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https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=6712a5c28983e31d6142d8e1ba95c65cd77ea401
commit 6712a5c28983e31d6142d8e1ba95c65cd77ea401
Merge: 5783558 5adde4e
Author:     Brad King <brad.k...@kitware.com>
AuthorDate: Mon Sep 19 09:01:13 2016 -0400
Commit:     CMake Topic Stage <kwro...@kitware.com>
CommitDate: Mon Sep 19 09:01:13 2016 -0400

    Merge topic 'cmake-server-basic' into next
    
    5adde4e7 cmake-server: Add documentation
    b63c1f6c cmake-server: Add unit test
    d341d077 cmake-server: Implement ServerProtocol 1.0
    b13d3e0d cmake-server: Bare-bones server implementation
    cd049f01 cmake-server: Report server mode availablitily in Capabilities


https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=5adde4e79d18dea7e73307e25deb2197833569a8
commit 5adde4e79d18dea7e73307e25deb2197833569a8
Author:     Tobias Hunger <tobias.hun...@qt.io>
AuthorDate: Tue Sep 13 10:57:06 2016 +0200
Commit:     Brad King <brad.k...@kitware.com>
CommitDate: Mon Sep 19 08:57:58 2016 -0400

    cmake-server: Add documentation

diff --git a/Help/index.rst b/Help/index.rst
index 2d3f156..97cd107 100644
--- a/Help/index.rst
+++ b/Help/index.rst
@@ -32,6 +32,7 @@ Reference Manuals
    /manual/cmake-generator-expressions.7
    /manual/cmake-generators.7
    /manual/cmake-language.7
+   /manual/cmake-server.7
    /manual/cmake-modules.7
    /manual/cmake-packages.7
    /manual/cmake-policies.7
diff --git a/Help/manual/cmake-server.7.rst b/Help/manual/cmake-server.7.rst
new file mode 100644
index 0000000..fd0c9ee
--- /dev/null
+++ b/Help/manual/cmake-server.7.rst
@@ -0,0 +1,188 @@
+.. cmake-manual-description: CMake Server
+
+cmake-server(7)
+***************
+
+.. only:: html
+
+   .. contents::
+
+Introduction
+============
+
+:manual:`cmake(1)` is capable of providing semantic information about
+CMake code it executes to generate a buildsystem.  If executed with
+the ``-E server`` command line options, it starts in a long running mode
+and allows a client to request the available information via a JSON protocol.
+
+The protocol is designed to be useful to IDEs, refactoring tools, and
+other tools which have a need to understand the buildsystem in entirety.
+
+A single :manual:`cmake-buildsystem(7)` may describe buildsystem contents
+and build properties which differ based on
+:manual:`generation-time context <cmake-generator-expressions(7)>`
+including:
+
+* The Platform (eg, Windows, APPLE, Linux).
+* The build configuration (eg, Debug, Release, Coverage).
+* The Compiler (eg, MSVC, GCC, Clang) and compiler version.
+* The language of the source files compiled.
+* Available compile features (eg CXX variadic templates).
+* CMake policies.
+
+The protocol aims to provide information to tooling to satisfy several
+needs:
+
+#. Provide a complete and easily parsed source of all information relevant
+   to the tooling as it relates to the source code.  There should be no need
+   for tooling to parse generated buildsystems to access include directories
+   or compile definitions for example.
+#. Semantic information about the CMake buildsystem itself.
+#. Provide a stable interface for reading the information in the CMake cache.
+#. Information for determining when cmake needs to be re-run as a result of
+   file changes.
+
+
+Operation
+=========
+
+Start :manual:`cmake(1)` in the server command mode, supplying the path to
+the build directory to process::
+
+  cmake -E server
+
+The server will start up and reply with an hello message on stdout::
+
+  [== CMake Server ==[
+  {"supportedProtocolVersions":[{"major":0,"minor":1}],"type":"hello"}
+  ]== CMake Server ==]
+
+Messages sent to and from the process are wrapped in magic strings::
+
+  [== CMake Server ==[
+  {
+    ... some JSON message ...
+  }
+  ]== CMake Server ==]
+
+The server is now ready to accept further requests via stdin.
+
+
+Protocol API
+============
+
+
+General Message Layout
+----------------------
+
+All messages need to have a "type" value, which identifies the type of
+message that is passed back or forth. E.g. the initial message sent by the
+server is of type "hello". Messages without a type will generate an response
+of type "error".
+
+All requests sent to the server may contain a "cookie" value. This value
+will he handed back unchanged in all responses triggered by the request.
+
+All responses will contain a value "inReplyTo", which may be empty in
+case of parse errors, but will contain the type of the request message
+in all other cases.
+
+
+Type "reply"
+^^^^^^^^^^^^
+
+This type is used by the server to reply to requests.
+
+The message may -- depending on the type of the original request --
+contain values.
+
+Example::
+
+  [== CMake Server ==[
+  {"cookie":"zimtstern","inReplyTo":"handshake","type":"reply"}
+  ]== CMake Server ==]
+
+
+Type "error"
+^^^^^^^^^^^^
+
+This type is used to return an error condition to the client. It will
+contain an "errorMessage".
+
+Example::
+
+  [== CMake Server ==[
+  {"cookie":"","errorMessage":"Protocol version not 
supported.","inReplyTo":"handshake","type":"error"}
+  ]== CMake Server ==]
+
+
+Type "progress"
+^^^^^^^^^^^^^^^
+
+When the server is busy for a long time, it is polite to send back replies of
+type "progress" to the client. These will contain a "progressMessage" with a
+string describing the action currently taking place as well as
+"progressMinimum", "progressMaximum" and "progressCurrent" with integer values
+describing the range of progess.
+
+Messages of type "progress" will be followed by more "progress" messages or 
with
+a message of type "reply" or "error" that complete the request.
+
+"progress" messages may not be emitted after the "reply" or "error" message for
+the request that triggered the responses was delivered.
+
+
+Specific Message Types
+----------------------
+
+
+Type "hello"
+^^^^^^^^^^^^
+
+The initial message send by the cmake server on startup is of type "hello".
+This is the only message ever sent by the server that is not of type "reply",
+"progress" or "error".
+
+It will contain "supportedProtocolVersions" with an array of server protocol
+versions supported by the cmake server. These are JSON objects with "major" and
+"minor" keys containing non-negative integer values.
+
+Example::
+
+  [== CMake Server ==[
+  {"supportedProtocolVersions":[{"major":0,"minor":1}],"type":"hello"}
+  ]== CMake Server ==]
+
+
+Type "handshake"
+^^^^^^^^^^^^^^^^
+
+The first request that the client may send to the server is of type 
"handshake".
+
+This request needs to pass one of the "supportedProtocolVersions" of the 
"hello"
+type response received earlier back to the server in the "protocolVersion" 
field.
+
+Each protocol version may request additional attributes to be present.
+
+Protocol version 1.0 requires the following attributes to be set:
+
+  * "sourceDirectory" with a path to the sources
+  * "buildDirectory" with a path to the build directory
+  * "generator" with the generator name
+  * "extraGenerator" (optional!) with the extra generator to be used.
+
+Example::
+
+  [== CMake Server ==[
+  {"cookie":"zimtstern","type":"handshake","protocolVersion":{"major":0},
+   "sourceDirectory":"/home/code/cmake", "buildDirectory":"/tmp/testbuild",
+   "generator":"Ninja"}
+  ]== CMake Server ==]
+
+which will result in a response type "reply"::
+
+  [== CMake Server ==[
+  {"cookie":"zimtstern","inReplyTo":"handshake","type":"reply"}
+  ]== CMake Server ==]
+
+indicating that the server is ready for action.
diff --git a/Help/manual/cmake.1.rst b/Help/manual/cmake.1.rst
index 2ccc6be..063aea1 100644
--- a/Help/manual/cmake.1.rst
+++ b/Help/manual/cmake.1.rst
@@ -273,6 +273,9 @@ Available commands are:
 ``rename <oldname> <newname>``
   Rename a file or directory (on one volume).
 
+``server``
+  Launch :manual:`cmake-server(7)` mode.
+
 ``sleep <number>...``
   Sleep for given number of seconds.
 

https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=b63c1f6ce75d82028efc364cff8277c77854dcc3
commit b63c1f6ce75d82028efc364cff8277c77854dcc3
Author:     Tobias Hunger <tobias.hun...@qt.io>
AuthorDate: Tue Sep 13 10:56:42 2016 +0200
Commit:     Brad King <brad.k...@kitware.com>
CommitDate: Mon Sep 19 08:57:58 2016 -0400

    cmake-server: Add unit test

diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index 97770ed..8cf1faa 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -2722,6 +2722,15 @@ ${CMake_BINARY_DIR}/bin/cmake -DDIR=dev -P 
${CMake_SOURCE_DIR}/Utilities/Release
   ADD_TEST_MACRO(CMakeCommands.target_compile_definitions 
target_compile_definitions)
   ADD_TEST_MACRO(CMakeCommands.target_compile_options target_compile_options)
 
+  if(CMake_HAVE_SERVER_MODE)
+    # The cmake server-mode test requires python for a simple client.
+    find_package(PythonInterp QUIET)
+    if(PYTHON_EXECUTABLE)
+      set(Server_BUILD_OPTIONS 
-DPYTHON_EXECUTABLE:FILEPATH=${PYTHON_EXECUTABLE})
+      ADD_TEST_MACRO(Server Server)
+    endif()
+  endif()
+
   configure_file(
     "${CMake_SOURCE_DIR}/Tests/CTestTestCrash/test.cmake.in"
     "${CMake_BINARY_DIR}/Tests/CTestTestCrash/test.cmake"
diff --git a/Tests/Server/CMakeLists.txt b/Tests/Server/CMakeLists.txt
new file mode 100644
index 0000000..8daf12a
--- /dev/null
+++ b/Tests/Server/CMakeLists.txt
@@ -0,0 +1,23 @@
+cmake_minimum_required(VERSION 3.4)
+project(Server CXX)
+
+find_package(PythonInterp REQUIRED)
+
+macro(do_test bsname file)
+  execute_process(COMMAND ${PYTHON_EXECUTABLE}
+    "${CMAKE_SOURCE_DIR}/server-test.py"
+    "${CMAKE_COMMAND}"
+    "${CMAKE_SOURCE_DIR}/${file}"
+    "${CMAKE_SOURCE_DIR}"
+    "${CMAKE_BINARY_DIR}"
+    RESULT_VARIABLE test_result
+    )
+
+  if (NOT test_result EQUAL 0)
+    message(SEND_ERROR "TEST FAILED")
+  endif()
+endmacro()
+
+do_test("test_handshake" "tc_handshake.json")
+
+add_executable(Server empty.cpp)
diff --git a/Tests/Server/cmakelib.py b/Tests/Server/cmakelib.py
new file mode 100644
index 0000000..48ebc89
--- /dev/null
+++ b/Tests/Server/cmakelib.py
@@ -0,0 +1,126 @@
+import sys, subprocess, json
+
+termwidth = 150
+
+print_communication = True
+
+def ordered(obj):
+  if isinstance(obj, dict):
+    return sorted((k, ordered(v)) for k, v in obj.items())
+  if isinstance(obj, list):
+    return sorted(ordered(x) for x in obj)
+  else:
+    return obj
+
+def col_print(title, array):
+  print
+  print
+  print(title)
+
+  indentwidth = 4
+  indent = " " * indentwidth
+
+  if not array:
+    print(indent + "<None>")
+    return
+
+  padwidth = 2
+
+  maxitemwidth = len(max(array, key=len))
+
+  numCols = max(1, int((termwidth - indentwidth + padwidth) / (maxitemwidth + 
padwidth)))
+
+  numRows = len(array) // numCols + 1
+
+  pad = " " * padwidth
+
+  for index in range(numRows):
+    print(indent + pad.join(item.ljust(maxitemwidth) for item in 
array[index::numRows]))
+
+def waitForRawMessage(cmakeCommand):
+  stdoutdata = ""
+  payload = ""
+  while not cmakeCommand.poll():
+    stdoutdataLine = cmakeCommand.stdout.readline()
+    if stdoutdataLine:
+      stdoutdata += stdoutdataLine.decode('utf-8')
+    else:
+      break
+    begin = stdoutdata.find("[== CMake Server ==[\n")
+    end = stdoutdata.find("]== CMake Server ==]")
+
+    if (begin != -1 and end != -1):
+      begin += len("[== CMake Server ==[\n")
+      payload = stdoutdata[begin:end]
+      if print_communication:
+        print("\nSERVER>", json.loads(payload), "\n")
+      return json.loads(payload)
+
+def writeRawData(cmakeCommand, content):
+  writeRawData.counter += 1
+  payload = """
+[== CMake Server ==[
+%s
+]== CMake Server ==]
+""" % content
+
+  rn = ( writeRawData.counter % 2 ) == 0
+
+  if rn:
+    payload = payload.replace('\n', '\r\n')
+
+  if print_communication:
+    print("\nCLIENT>", content, "(Use \\r\\n:", rn, ")\n")
+  cmakeCommand.stdin.write(payload.encode('utf-8'))
+  cmakeCommand.stdin.flush()
+writeRawData.counter = 0
+
+def writePayload(cmakeCommand, obj):
+  writeRawData(cmakeCommand, json.dumps(obj))
+
+def initProc(cmakeCommand):
+  cmakeCommand = subprocess.Popen([cmakeCommand, "-E", "server"],
+                                  stdin=subprocess.PIPE,
+                                  stdout=subprocess.PIPE)
+
+  packet = waitForRawMessage(cmakeCommand)
+  if packet == None:
+    print("Not in server mode")
+    sys.exit(1)
+
+  if packet['type'] != 'hello':
+    print("No hello message")
+    sys.exit(1)
+
+  return cmakeCommand
+
+def waitForMessage(cmakeCommand, expected):
+  data = ordered(expected)
+  packet = ordered(waitForRawMessage(cmakeCommand))
+
+  if packet != data:
+    sys.exit(-1)
+  return packet
+
+def waitForReply(cmakeCommand, originalType, cookie):
+  packet = waitForRawMessage(cmakeCommand)
+  if packet['cookie'] != cookie or packet['type'] != 'reply' or 
packet['inReplyTo'] != originalType:
+    sys.exit(1)
+
+def waitForError(cmakeCommand, originalType, cookie, message):
+  packet = waitForRawMessage(cmakeCommand)
+  if packet['cookie'] != cookie or packet['type'] != 'error' or 
packet['inReplyTo'] != originalType or packet['errorMessage'] != message:
+    sys.exit(1)
+
+def waitForProgress(cmakeCommand, originalType, cookie, current, message):
+  packet = waitForRawMessage(cmakeCommand)
+  if packet['cookie'] != cookie or packet['type'] != 'progress' or 
packet['inReplyTo'] != originalType or packet['progressCurrent'] != current or 
packet['progressMessage'] != message:
+    sys.exit(1)
+
+def handshake(cmakeCommand, major, minor):
+  version = { 'major': major }
+  if minor >= 0:
+    version['minor'] = minor
+
+  writePayload(cmakeCommand, { 'type': 'handshake', 'protocolVersion': 
version, 'cookie': 'TEST_HANDSHAKE' })
+  waitForReply(cmakeCommand, 'handshake', 'TEST_HANDSHAKE')
diff --git a/Tests/Server/empty.cpp b/Tests/Server/empty.cpp
new file mode 100644
index 0000000..766b775
--- /dev/null
+++ b/Tests/Server/empty.cpp
@@ -0,0 +1,5 @@
+
+int main()
+{
+  return 0;
+}
diff --git a/Tests/Server/server-test.py b/Tests/Server/server-test.py
new file mode 100644
index 0000000..e0a3b3b
--- /dev/null
+++ b/Tests/Server/server-test.py
@@ -0,0 +1,82 @@
+import sys, cmakelib, json
+
+debug = True
+
+cmakeCommand = sys.argv[1]
+testFile = sys.argv[2]
+sourceDir = sys.argv[3]
+buildDir = sys.argv[4]
+
+print("SourceDir: ", sourceDir, " -- BuildDir: ", buildDir)
+
+proc = cmakelib.initProc(cmakeCommand)
+
+with open(testFile) as f:
+    testText = f.read()
+    testText = testText.replace('%BUILDDIR%', buildDir)
+    testText = testText.replace('%SOURCEDIR%', sourceDir)
+    testData = json.loads(testText)
+
+buildDir = sys.argv[3]
+sourceDir = sys.argv[4]
+
+for obj in testData:
+    if 'sendRaw' in obj:
+        data = obj['sendRaw']
+        if debug: print("Sending raw:", data)
+        cmakelib.writeRawData(proc, data)
+    elif 'send' in obj:
+        data = obj['send']
+        if debug: print("Sending:", json.dumps(data))
+        cmakelib.writePayload(proc, data)
+    elif 'recv' in obj:
+        data = obj['recv']
+        if debug: print("Waiting for:", json.dumps(data))
+        cmakelib.waitForMessage(proc, data)
+    elif 'reply' in obj:
+        data = obj['reply']
+        if debug: print("Waiting for reply:", json.dumps(data))
+        originalType = ""
+        cookie = ""
+        if 'cookie' in data: cookie = data['cookie']
+        if 'type' in data: originalType = data['type']
+        cmakelib.waitForReply(proc, originalType, cookie)
+    elif 'error' in obj:
+        data = obj['error']
+        if debug: print("Waiting for error:", json.dumps(data))
+        originalType = ""
+        cookie = ""
+        message = ""
+        if 'cookie' in data: cookie = data['cookie']
+        if 'type' in data: originalType = data['type']
+        if 'message' in data: message = data['message']
+        cmakelib.waitForError(proc, originalType, cookie, message)
+    elif 'progress' in obj:
+        data = obj['progress']
+        if debug: print("Waiting for progress:", json.dumps(data))
+        originalType = ''
+        cookie = ""
+        current = 0
+        message = ""
+        if 'cookie' in data: cookie = data['cookie']
+        if 'type' in data: originalType = data['type']
+        if 'current' in data: current = data['current']
+        if 'message' in data: message = data['message']
+        cmakelib.waitForProgress(proc, originalType, cookie, current, message)
+    elif 'handshake' in obj:
+        data = obj['handshake']
+        if debug: print("Doing handshake:", json.dumps(data))
+        major = -1
+        minor = -1
+        if 'major' in data: major = data['major']
+        if 'minor' in data: minor = data['minor']
+        cmakelib.handshake(proc, major, minor)
+    elif 'message' in obj:
+        print("MESSAGE:", obj["message"])
+    else:
+        print("Unknown command:", json.dumps(obj))
+        sys.exit(2)
+
+    print("Completed")
+
+sys.exit(0)
diff --git a/Tests/Server/tc_handshake.json b/Tests/Server/tc_handshake.json
new file mode 100644
index 0000000..5261581
--- /dev/null
+++ b/Tests/Server/tc_handshake.json
@@ -0,0 +1,71 @@
+[
+{ "message": "Testing basic message handling:" },
+
+{ "sendRaw": "Sometext"},
+{ "recv": {"cookie":"","errorMessage":"Failed to parse JSON 
input.","inReplyTo":"","type":"error"} },
+
+{ "message": "Testing invalid json input"},
+{ "send": { "test": "sometext" } },
+{ "recv": {"cookie":"","errorMessage":"No type given in 
request.","inReplyTo":"","type":"error"} },
+
+{ "send": {"test": "sometext","cookie":"monster"} },
+{ "recv": {"cookie":"monster","errorMessage":"No type given in 
request.","inReplyTo":"","type":"error"} },
+
+{ "message": "Testing handshake" },
+{ "send": {"type": "sometype","cookie":"monster2"} },
+{ "recv": {"cookie":"monster2","errorMessage":"Waiting for type 
\"handshake\".","inReplyTo":"sometype","type":"error"} },
+
+{ "send": {"type": "handshake"} },
+{ "recv": {"cookie":"","errorMessage":"\"protocolVersion\" is required for 
\"handshake\".","inReplyTo":"handshake","type":"error"} },
+
+{ "send": {"type": "handshake","foo":"bar"} },
+{ "recv": {"cookie":"","errorMessage":"\"protocolVersion\" is required for 
\"handshake\".","inReplyTo":"handshake","type":"error"} },
+
+{ "send": {"type": "handshake","protocolVersion":"bar"} },
+{ "recv": {"cookie":"","errorMessage":"\"protocolVersion\" must be a JSON 
object.","inReplyTo":"handshake","type":"error"} },
+
+{ "send": {"type": "handshake","protocolVersion":{}} },
+{ "recv": {"cookie":"","errorMessage":"\"major\" must be set and an 
integer.","inReplyTo":"handshake","type":"error"} },
+
+{ "send": {"type": "handshake","protocolVersion":{"major":"foo"}} },
+{ "recv": {"cookie":"","errorMessage":"\"major\" must be set and an 
integer.","inReplyTo":"handshake","type":"error"} },
+
+{ "send": {"type": "handshake","protocolVersion":{"major":1, "minor":"foo"}} },
+{ "recv": {"cookie":"","errorMessage":"\"minor\" must be unset or an 
integer.","inReplyTo":"handshake","type":"error"} },
+
+{ "send": {"type": "handshake","protocolVersion":{"major":-1, "minor":-1}} },
+{ "recv": {"cookie":"","errorMessage":"\"major\" must be >= 
0.","inReplyTo":"handshake","type":"error"} },
+
+{ "send": {"type": "handshake","protocolVersion":{"major":10, "minor":-1}} },
+{ "recv": {"cookie":"","errorMessage":"\"minor\" must be >= 0 when 
set.","inReplyTo":"handshake","type":"error"} },
+
+{ "send": {"type": "handshake","protocolVersion":{"major":10000}} },
+{ "recv": {"cookie":"","errorMessage":"Protocol version not 
supported.","inReplyTo":"handshake","type":"error"} },
+
+{ "send": {"type": "handshake","protocolVersion":{"major":1, "minor":10000}} },
+{ "recv": {"cookie":"","errorMessage":"Protocol version not 
supported.","inReplyTo":"handshake","type":"error"} },
+
+{ "send": {"cookie":"zimtstern","type": 
"handshake","protocolVersion":{"major":1}} },
+{ "recv": 
{"cookie":"zimtstern","inReplyTo":"handshake","type":"error","errorMessage":"Failed
 to activate protocol version: \"buildDirectory\" is missing."} },
+
+{ "message": "Testing protocol version specific options (1.0):" },
+{ "send": {"cookie":"zimtstern","type": 
"handshake","protocolVersion":{"major":1},"sourceDirectory":"/tmp/src"} },
+{ "recv": 
{"cookie":"zimtstern","inReplyTo":"handshake","type":"error","errorMessage":"Failed
 to activate protocol version: \"buildDirectory\" is missing."} },
+
+{ "send": {"cookie":"zimtstern","type": 
"handshake","protocolVersion":{"major":1},"sourceDirectory":"/tmp/src","buildDirectory":"/tmp/build"}
 },
+{ "recv": 
{"cookie":"zimtstern","inReplyTo":"handshake","type":"error","errorMessage":"Failed
 to activate protocol version: \"sourceDirectory\" is not a directory."} },
+
+{ "send": {"cookie":"zimtstern","type": 
"handshake","protocolVersion":{"major":1},"sourceDirectory":".","buildDirectory":"/tmp/build","extraGenerator":"CodeBlocks"}
 },
+{ "recv": 
{"cookie":"zimtstern","inReplyTo":"handshake","type":"error","errorMessage":"Failed
 to activate protocol version: \"generator\" is unset but required."} },
+
+{ "send": {"cookie":"zimtstern","type": 
"handshake","protocolVersion":{"major":1},"sourceDirectory":".","buildDirectory":"/tmp/build","generator":"XXXX","extraGenerator":"CodeBlocks"}
 },
+{ "recv": 
{"cookie":"zimtstern","inReplyTo":"handshake","type":"error","errorMessage":"Failed
 to activate protocol version: Could not set up the requested combination of 
\"generator\" and \"extraGenerator\""} },
+
+{ "send": {"cookie":"zimtstern","type": 
"handshake","protocolVersion":{"major":1},"sourceDirectory":".","buildDirectory":"/tmp/build","generator":"Ninja","extraGenerator":"XXXX"}
 },
+{ "recv": 
{"cookie":"zimtstern","inReplyTo":"handshake","type":"error","errorMessage":"Failed
 to activate protocol version: Could not set up the requested combination of 
\"generator\" and \"extraGenerator\""} },
+
+{ "send": {"cookie":"zimtstern","type": 
"handshake","protocolVersion":{"major":1},"sourceDirectory":".","buildDirectory":"/tmp/build","generator":"Ninja","extraGenerator":"CodeBlocks"}
 },
+{ "recv": {"cookie":"zimtstern","inReplyTo":"handshake","type":"reply"} },
+
+{ "message": "Everything ok." }
+]

https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=d341d077c5fb5c3df3732210b836a9ba6cb53873
commit d341d077c5fb5c3df3732210b836a9ba6cb53873
Author:     Tobias Hunger <tobias.hun...@qt.io>
AuthorDate: Tue Sep 13 11:39:24 2016 +0200
Commit:     Brad King <brad.k...@kitware.com>
CommitDate: Mon Sep 19 08:57:57 2016 -0400

    cmake-server: Implement ServerProtocol 1.0
    
    Enable the initial handshake of the client to complete the connection
    to the server.
    
    The handshake sets the protocol version that client and server will
    use to talk to each other. The only way to change this is to quit the
    server and start over.
    
    CMake specific information is also set during the initial handshake.
    Since cmake so far never had to change basic information about any project
    while running, it was decided to keep this information static and
    require a restart of the cmake server to change any of these.

diff --git a/Source/cmServer.cxx b/Source/cmServer.cxx
index 7643b47..123b6a4 100644
--- a/Source/cmServer.cxx
+++ b/Source/cmServer.cxx
@@ -87,6 +87,8 @@ void read_stdin(uv_stream_t* stream, ssize_t nread, const 
uv_buf_t* buf)
 
 cmServer::cmServer()
 {
+  // Register supported protocols:
+  this->RegisterProtocol(new cmServerProtocol1_0);
 }
 
 cmServer::~cmServer()
@@ -245,6 +247,7 @@ cmServerResponse cmServer::SetProtocolVersion(const 
cmServerRequest& request)
 
 void cmServer::Serve()
 {
+  assert(!this->SupportedProtocols.empty());
   assert(!this->Protocol);
 
   this->Loop = uv_default_loop();
diff --git a/Source/cmServerProtocol.cxx b/Source/cmServerProtocol.cxx
index 659aa0f..c3a4d8e 100644
--- a/Source/cmServerProtocol.cxx
+++ b/Source/cmServerProtocol.cxx
@@ -14,6 +14,7 @@
 
 #include "cmExternalMakefileProjectGenerator.h"
 #include "cmServer.h"
+#include "cmSystemTools.h"
 #include "cmake.h"
 
 #if defined(CMAKE_BUILD_WITH_CMAKE)
@@ -24,7 +25,11 @@
 namespace {
 // Vocabulary:
 
+const std::string kBUILD_DIRECTORY_KEY = "buildDirectory";
 const std::string kCOOKIE_KEY = "cookie";
+const std::string kEXTRA_GENERATOR_KEY = "extraGenerator";
+const std::string kGENERATOR_KEY = "generator";
+const std::string kSOURCE_DIRECTORY_KEY = "sourceDirectory";
 const std::string kTYPE_KEY = "type";
 
 } // namespace
@@ -127,3 +132,133 @@ bool cmServerProtocol::DoActivate(const cmServerRequest& 
/*request*/,
 {
   return true;
 }
+
+std::pair<int, int> cmServerProtocol1_0::ProtocolVersion() const
+{
+  return std::make_pair(1, 0);
+}
+
+bool cmServerProtocol1_0::DoActivate(const cmServerRequest& request,
+                                     std::string* errorMessage)
+{
+  std::string sourceDirectory = request.Data[kSOURCE_DIRECTORY_KEY].asString();
+  const std::string buildDirectory =
+    request.Data[kBUILD_DIRECTORY_KEY].asString();
+  std::string generator = request.Data[kGENERATOR_KEY].asString();
+  std::string extraGenerator = request.Data[kEXTRA_GENERATOR_KEY].asString();
+
+  if (buildDirectory.empty()) {
+    if (errorMessage)
+      *errorMessage =
+        std::string("\"") + kBUILD_DIRECTORY_KEY + "\" is missing.";
+    return false;
+  }
+  cmake* cm = CMakeInstance();
+  if (cmSystemTools::PathExists(buildDirectory)) {
+    if (!cmSystemTools::FileIsDirectory(buildDirectory)) {
+      if (errorMessage)
+        *errorMessage = std::string("\"") + kBUILD_DIRECTORY_KEY +
+          "\" exists but is not a directory.";
+      return false;
+    }
+
+    const std::string cachePath = cm->FindCacheFile(buildDirectory);
+    if (cm->LoadCache(cachePath)) {
+      cmState* state = cm->GetState();
+
+      // Check generator:
+      const std::string cachedGenerator =
+        std::string(state->GetCacheEntryValue("CMAKE_GENERATOR"));
+      if (cachedGenerator.empty() && generator.empty()) {
+        if (errorMessage)
+          *errorMessage =
+            std::string("\"") + kGENERATOR_KEY + "\" is required but unset.";
+        return false;
+      }
+      if (generator.empty()) {
+        generator = cachedGenerator;
+      }
+      if (generator != cachedGenerator) {
+        if (errorMessage)
+          *errorMessage = std::string("\"") + kGENERATOR_KEY +
+            "\" set but incompatible with configured generator.";
+        return false;
+      }
+
+      // check extra generator:
+      const std::string cachedExtraGenerator =
+        std::string(state->GetCacheEntryValue("CMAKE_EXTRA_GENERATOR"));
+      if (!cachedExtraGenerator.empty() && !extraGenerator.empty() &&
+          cachedExtraGenerator != extraGenerator) {
+        if (errorMessage)
+          *errorMessage = std::string("\"") + kEXTRA_GENERATOR_KEY +
+            "\" is set but incompatible with configured extra generator.";
+        return false;
+      }
+      if (extraGenerator.empty()) {
+        extraGenerator = cachedExtraGenerator;
+      }
+
+      // check sourcedir:
+      const std::string cachedSourceDirectory =
+        std::string(state->GetCacheEntryValue("CMAKE_HOME_DIRECTORY"));
+      if (!cachedSourceDirectory.empty() && !sourceDirectory.empty() &&
+          cachedSourceDirectory != sourceDirectory) {
+        if (errorMessage)
+          *errorMessage = std::string("\"") + kSOURCE_DIRECTORY_KEY +
+            "\" is set but incompatible with configured source directory.";
+        return false;
+      }
+      if (sourceDirectory.empty()) {
+        sourceDirectory = cachedSourceDirectory;
+      }
+    }
+  }
+
+  if (sourceDirectory.empty()) {
+    if (errorMessage)
+      *errorMessage = std::string("\"") + kSOURCE_DIRECTORY_KEY +
+        "\" is unset but required.";
+    return false;
+  }
+  if (!cmSystemTools::FileIsDirectory(sourceDirectory)) {
+    if (errorMessage)
+      *errorMessage =
+        std::string("\"") + kSOURCE_DIRECTORY_KEY + "\" is not a directory.";
+    return false;
+  }
+  if (generator.empty()) {
+    if (errorMessage)
+      *errorMessage =
+        std::string("\"") + kGENERATOR_KEY + "\" is unset but required.";
+    return false;
+  }
+
+  const std::string fullGeneratorName =
+    cmExternalMakefileProjectGenerator::CreateFullGeneratorName(
+      generator, extraGenerator);
+
+  cmGlobalGenerator* gg = cm->CreateGlobalGenerator(fullGeneratorName);
+  if (!gg) {
+    if (errorMessage)
+      *errorMessage =
+        std::string("Could not set up the requested combination of \"") +
+        kGENERATOR_KEY + "\" and \"" + kEXTRA_GENERATOR_KEY + "\"";
+    return false;
+  }
+
+  cm->SetGlobalGenerator(gg);
+  cm->SetHomeDirectory(sourceDirectory);
+  cm->SetHomeOutputDirectory(buildDirectory);
+
+  this->m_State = STATE_ACTIVE;
+  return true;
+}
+
+const cmServerResponse cmServerProtocol1_0::Process(
+  const cmServerRequest& request)
+{
+  assert(this->m_State >= STATE_ACTIVE);
+
+  return request.ReportError("Unknown command!");
+}
diff --git a/Source/cmServerProtocol.h b/Source/cmServerProtocol.h
index e086f72..33183e9 100644
--- a/Source/cmServerProtocol.h
+++ b/Source/cmServerProtocol.h
@@ -95,3 +95,21 @@ protected:
 private:
   std::unique_ptr<cmake> m_CMakeInstance;
 };
+
+class cmServerProtocol1_0 : public cmServerProtocol
+{
+public:
+  std::pair<int, int> ProtocolVersion() const override;
+  const cmServerResponse Process(const cmServerRequest& request) override;
+
+private:
+  bool DoActivate(const cmServerRequest& request,
+                  std::string* errorMessage) override;
+
+  enum State
+  {
+    STATE_INACTIVE,
+    STATE_ACTIVE
+  };
+  State m_State = STATE_INACTIVE;
+};

https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=b13d3e0d0b3c644242ef8dc4977d35da73398a9d
commit b13d3e0d0b3c644242ef8dc4977d35da73398a9d
Author:     Tobias Hunger <tobias.hun...@qt.io>
AuthorDate: Tue Sep 13 11:26:34 2016 +0200
Commit:     Brad King <brad.k...@kitware.com>
CommitDate: Mon Sep 19 08:57:57 2016 -0400

    cmake-server: Bare-bones server implementation
    
    Adds a bare-bones cmake-server implementation and makes it possible
    to start that with "cmake -E server".
    
    Communication happens via stdin/stdout for now.
    
    Protocol is based on Json objects surrounded by magic strings
    ("[== CMake Server ==[" and "]== CMake Server ==]"), which simplifies
    Json parsing significantly.
    
    This patch also defines an interface used to implement different
    versions of the protocol spoken by the server, but does not include
    any protocol implementaiton.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c8bd063..2ec8b57 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -702,6 +702,18 @@ endif()
 # setup some Testing support (a macro defined in this file)
 CMAKE_SETUP_TESTING()
 
+# Check whether to build server mode or not:
+set(CMake_HAVE_SERVER_MODE 0)
+if(NOT CMake_TEST_EXTERNAL_CMAKE AND NOT CMAKE_BOOTSTRAP AND CMAKE_USE_LIBUV)
+  list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_auto_type CMake_HAVE_CXX_AUTO_TYPE)
+  list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_range_for CMake_HAVE_CXX_RANGE_FOR)
+  if(CMake_HAVE_CXX_AUTO_TYPE AND CMake_HAVE_CXX_RANGE_FOR)
+    if(CMake_HAVE_CXX_MAKE_UNIQUE)
+      set(CMake_HAVE_SERVER_MODE 1)
+    endif()
+  endif()
+endif()
+
 if(NOT CMake_TEST_EXTERNAL_CMAKE)
   if(NOT CMake_VERSION_IS_RELEASE)
     if(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND
diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index 39773e1..a2dead6 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -786,6 +786,17 @@ add_executable(cmake cmakemain.cxx cmcmd.cxx cmcmd.h 
${MANIFEST_FILE})
 list(APPEND _tools cmake)
 target_link_libraries(cmake CMakeLib)
 
+if(CMake_HAVE_SERVER_MODE)
+  add_library(CMakeServerLib
+    cmServer.cxx cmServer.h
+    cmServerProtocol.cxx cmServerProtocol.h
+    )
+  target_link_libraries(CMakeServerLib CMakeLib)
+  set_property(SOURCE cmcmd.cxx APPEND PROPERTY COMPILE_DEFINITIONS 
HAVE_SERVER_MODE=1)
+
+  target_link_libraries(cmake CMakeServerLib)
+endif()
+
 # Build CTest executable
 add_executable(ctest ctest.cxx ${MANIFEST_FILE})
 list(APPEND _tools ctest)
diff --git a/Source/cmServer.cxx b/Source/cmServer.cxx
new file mode 100644
index 0000000..7643b47
--- /dev/null
+++ b/Source/cmServer.cxx
@@ -0,0 +1,352 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2015 Stephen Kelly <steve...@gmail.com>
+  Copyright 2016 Tobias Hunger <tobias.hun...@qt.io>
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+
+#include "cmServer.h"
+
+#include "cmServerProtocol.h"
+#include "cmVersionMacros.h"
+#include "cmake.h"
+
+#if defined(CMAKE_BUILD_WITH_CMAKE)
+#include "cm_jsoncpp_reader.h"
+#include "cm_jsoncpp_value.h"
+#endif
+
+const char kTYPE_KEY[] = "type";
+const char kCOOKIE_KEY[] = "cookie";
+const char REPLY_TO_KEY[] = "inReplyTo";
+const char ERROR_MESSAGE_KEY[] = "errorMessage";
+
+const char ERROR_TYPE[] = "error";
+const char REPLY_TYPE[] = "reply";
+const char PROGRESS_TYPE[] = "progress";
+
+const char START_MAGIC[] = "[== CMake Server ==[";
+const char END_MAGIC[] = "]== CMake Server ==]";
+
+typedef struct
+{
+  uv_write_t req;
+  uv_buf_t buf;
+} write_req_t;
+
+void alloc_buffer(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf)
+{
+  (void)handle;
+  *buf = uv_buf_init(static_cast<char*>(malloc(suggested_size)),
+                     static_cast<unsigned int>(suggested_size));
+}
+
+void free_write_req(uv_write_t* req)
+{
+  write_req_t* wr = reinterpret_cast<write_req_t*>(req);
+  free(wr->buf.base);
+  free(wr);
+}
+
+void on_stdout_write(uv_write_t* req, int status)
+{
+  (void)status;
+  auto server = reinterpret_cast<cmServer*>(req->data);
+  free_write_req(req);
+  server->PopOne();
+}
+
+void write_data(uv_stream_t* dest, std::string content, uv_write_cb cb)
+{
+  write_req_t* req = static_cast<write_req_t*>(malloc(sizeof(write_req_t)));
+  req->req.data = dest->data;
+  req->buf = uv_buf_init(static_cast<char*>(malloc(content.size())),
+                         static_cast<unsigned int>(content.size()));
+  memcpy(req->buf.base, content.c_str(), content.size());
+  uv_write(reinterpret_cast<uv_write_t*>(req), static_cast<uv_stream_t*>(dest),
+           &req->buf, 1, cb);
+}
+
+void read_stdin(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf)
+{
+  if (nread > 0) {
+    auto server = reinterpret_cast<cmServer*>(stream->data);
+    std::string result = std::string(buf->base, buf->base + nread);
+    server->handleData(result);
+  }
+
+  if (buf->base)
+    free(buf->base);
+}
+
+cmServer::cmServer()
+{
+}
+
+cmServer::~cmServer()
+{
+  if (!this->Protocol) // Daemon was never fully started!
+    return;
+
+  uv_close(reinterpret_cast<uv_handle_t*>(this->InputStream), NULL);
+  uv_close(reinterpret_cast<uv_handle_t*>(this->OutputStream), NULL);
+  uv_loop_close(this->Loop);
+
+  for (cmServerProtocol* p : this->SupportedProtocols) {
+    delete p;
+  }
+}
+
+void cmServer::PopOne()
+{
+  this->Writing = false;
+  if (this->Queue.empty()) {
+    return;
+  }
+
+  Json::Reader reader;
+  Json::Value value;
+  const std::string input = this->Queue.front();
+  this->Queue.erase(this->Queue.begin());
+
+  if (!reader.parse(input, value)) {
+    this->WriteParseError("Failed to parse JSON input.");
+    return;
+  }
+
+  const cmServerRequest request(this, value[kTYPE_KEY].asString(),
+                                value[kCOOKIE_KEY].asString(), value);
+
+  if (request.Type == "") {
+    cmServerResponse response(request);
+    response.SetError("No type given in request.");
+    this->WriteResponse(response);
+    return;
+  }
+
+  this->WriteResponse(this->Protocol ? this->Protocol->Process(request)
+                                     : this->SetProtocolVersion(request));
+}
+
+void cmServer::handleData(const std::string& data)
+{
+  this->DataBuffer += data;
+
+  for (;;) {
+    auto needle = this->DataBuffer.find('\n');
+
+    if (needle == std::string::npos) {
+      return;
+    }
+    std::string line = this->DataBuffer.substr(0, needle);
+    const auto ls = line.size();
+    if (ls > 1 && line.at(ls - 1) == '\r')
+      line.erase(ls - 1, 1);
+    this->DataBuffer.erase(this->DataBuffer.begin(),
+                           this->DataBuffer.begin() + needle + 1);
+    if (line == START_MAGIC) {
+      this->JsonData.clear();
+      continue;
+    }
+    if (line == END_MAGIC) {
+      this->Queue.push_back(this->JsonData);
+      this->JsonData.clear();
+      if (!this->Writing) {
+        this->PopOne();
+      }
+    } else {
+      this->JsonData += line;
+      this->JsonData += "\n";
+    }
+  }
+}
+
+void cmServer::RegisterProtocol(cmServerProtocol* protocol)
+{
+  auto version = protocol->ProtocolVersion();
+  assert(version.first >= 0);
+  assert(version.second >= 0);
+  auto it = std::find_if(this->SupportedProtocols.begin(),
+                         this->SupportedProtocols.end(),
+                         [version](cmServerProtocol* p) {
+                           return p->ProtocolVersion() == version;
+                         });
+  if (it == this->SupportedProtocols.end())
+    this->SupportedProtocols.push_back(protocol);
+}
+
+void cmServer::PrintHello() const
+{
+  Json::Value hello = Json::objectValue;
+  hello[kTYPE_KEY] = "hello";
+
+  Json::Value& protocolVersions = hello["supportedProtocolVersions"] =
+    Json::arrayValue;
+
+  for (auto const& proto : this->SupportedProtocols) {
+    auto version = proto->ProtocolVersion();
+    Json::Value tmp = Json::objectValue;
+    tmp["major"] = version.first;
+    tmp["minor"] = version.second;
+    protocolVersions.append(tmp);
+  }
+
+  this->WriteJsonObject(hello);
+}
+
+cmServerResponse cmServer::SetProtocolVersion(const cmServerRequest& request)
+{
+  if (request.Type != "handshake")
+    return request.ReportError("Waiting for type \"handshake\".");
+
+  Json::Value requestedProtocolVersion = request.Data["protocolVersion"];
+  if (requestedProtocolVersion.isNull())
+    return request.ReportError(
+      "\"protocolVersion\" is required for \"handshake\".");
+
+  if (!requestedProtocolVersion.isObject())
+    return request.ReportError("\"protocolVersion\" must be a JSON object.");
+
+  Json::Value majorValue = requestedProtocolVersion["major"];
+  if (!majorValue.isInt())
+    return request.ReportError("\"major\" must be set and an integer.");
+
+  Json::Value minorValue = requestedProtocolVersion["minor"];
+  if (!minorValue.isNull() && !minorValue.isInt())
+    return request.ReportError("\"minor\" must be unset or an integer.");
+
+  const int major = majorValue.asInt();
+  const int minor = minorValue.isNull() ? -1 : minorValue.asInt();
+  if (major < 0)
+    return request.ReportError("\"major\" must be >= 0.");
+  if (!minorValue.isNull() && minor < 0)
+    return request.ReportError("\"minor\" must be >= 0 when set.");
+
+  this->Protocol =
+    this->FindMatchingProtocol(this->SupportedProtocols, major, minor);
+  if (!this->Protocol) {
+    return request.ReportError("Protocol version not supported.");
+  }
+
+  std::string errorMessage;
+  if (!this->Protocol->Activate(request, &errorMessage)) {
+    this->Protocol = CM_NULLPTR;
+    return request.ReportError("Failed to activate protocol version: " +
+                               errorMessage);
+  }
+  return request.Reply(Json::objectValue);
+}
+
+void cmServer::Serve()
+{
+  assert(!this->Protocol);
+
+  this->Loop = uv_default_loop();
+
+  if (uv_guess_handle(1) == UV_TTY) {
+    uv_tty_init(this->Loop, &this->Input.tty, 0, 1);
+    uv_tty_set_mode(&this->Input.tty, UV_TTY_MODE_NORMAL);
+    this->Input.tty.data = this;
+    InputStream = reinterpret_cast<uv_stream_t*>(&this->Input.tty);
+
+    uv_tty_init(this->Loop, &this->Output.tty, 1, 0);
+    uv_tty_set_mode(&this->Output.tty, UV_TTY_MODE_NORMAL);
+    this->Output.tty.data = this;
+    OutputStream = reinterpret_cast<uv_stream_t*>(&this->Output.tty);
+  } else {
+    uv_pipe_init(this->Loop, &this->Input.pipe, 0);
+    uv_pipe_open(&this->Input.pipe, 0);
+    this->Input.pipe.data = this;
+    InputStream = reinterpret_cast<uv_stream_t*>(&this->Input.pipe);
+
+    uv_pipe_init(this->Loop, &this->Output.pipe, 0);
+    uv_pipe_open(&this->Output.pipe, 1);
+    this->Output.pipe.data = this;
+    OutputStream = reinterpret_cast<uv_stream_t*>(&this->Output.pipe);
+  }
+
+  this->PrintHello();
+
+  uv_read_start(this->InputStream, alloc_buffer, read_stdin);
+
+  uv_run(this->Loop, UV_RUN_DEFAULT);
+}
+
+void cmServer::WriteJsonObject(const Json::Value& jsonValue) const
+{
+  Json::FastWriter writer;
+
+  std::string result = std::string("\n") + std::string(START_MAGIC) +
+    std::string("\n") + writer.write(jsonValue) + std::string(END_MAGIC) +
+    std::string("\n");
+
+  this->Writing = true;
+  write_data(this->OutputStream, result, on_stdout_write);
+}
+
+cmServerProtocol* cmServer::FindMatchingProtocol(
+  const std::vector<cmServerProtocol*>& protocols, int major, int minor)
+{
+  cmServerProtocol* bestMatch = nullptr;
+  for (auto protocol : protocols) {
+    auto version = protocol->ProtocolVersion();
+    if (major != version.first)
+      continue;
+    if (minor == version.second)
+      return protocol;
+    if (!bestMatch || bestMatch->ProtocolVersion().second < version.second)
+      bestMatch = protocol;
+  }
+  return minor < 0 ? bestMatch : nullptr;
+}
+
+void cmServer::WriteProgress(const cmServerRequest& request, int min,
+                             int current, int max,
+                             const std::string& message) const
+{
+  assert(min <= current && current <= max);
+  assert(message.length() != 0);
+
+  Json::Value obj = Json::objectValue;
+  obj[kTYPE_KEY] = PROGRESS_TYPE;
+  obj[REPLY_TO_KEY] = request.Type;
+  obj[kCOOKIE_KEY] = request.Cookie;
+  obj["progressMessage"] = message;
+  obj["progressMinimum"] = min;
+  obj["progressMaximum"] = max;
+  obj["progressCurrent"] = current;
+
+  this->WriteJsonObject(obj);
+}
+
+void cmServer::WriteParseError(const std::string& message) const
+{
+  Json::Value obj = Json::objectValue;
+  obj[kTYPE_KEY] = ERROR_TYPE;
+  obj[ERROR_MESSAGE_KEY] = message;
+  obj[REPLY_TO_KEY] = "";
+  obj[kCOOKIE_KEY] = "";
+
+  this->WriteJsonObject(obj);
+}
+
+void cmServer::WriteResponse(const cmServerResponse& response) const
+{
+  assert(response.IsComplete());
+
+  Json::Value obj = response.Data();
+  obj[kCOOKIE_KEY] = response.Cookie;
+  obj[kTYPE_KEY] = response.IsError() ? ERROR_TYPE : REPLY_TYPE;
+  obj[REPLY_TO_KEY] = response.Type;
+  if (response.IsError()) {
+    obj[ERROR_MESSAGE_KEY] = response.ErrorMessage();
+  }
+
+  this->WriteJsonObject(obj);
+}
diff --git a/Source/cmServer.h b/Source/cmServer.h
new file mode 100644
index 0000000..0ef1e17
--- /dev/null
+++ b/Source/cmServer.h
@@ -0,0 +1,85 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2015 Stephen Kelly <steve...@gmail.com>
+  Copyright 2016 Tobias Hunger <tobias.hun...@qt.io>
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+
+#pragma once
+
+#include "cmListFileCache.h"
+#include "cmState.h"
+
+#if defined(CMAKE_BUILD_WITH_CMAKE)
+#include "cm_jsoncpp_value.h"
+#include "cm_uv.h"
+#endif
+
+#include <string>
+#include <vector>
+
+class cmServerProtocol;
+class cmServerRequest;
+class cmServerResponse;
+
+class cmServer
+{
+public:
+  cmServer();
+  ~cmServer();
+
+  void Serve();
+
+  // for callbacks:
+  void PopOne();
+  void handleData(std::string const& data);
+
+private:
+  void RegisterProtocol(cmServerProtocol* protocol);
+
+  // Handle requests:
+  cmServerResponse SetProtocolVersion(const cmServerRequest& request);
+
+  void PrintHello() const;
+
+  // Write responses:
+  void WriteProgress(const cmServerRequest& request, int min, int current,
+                     int max, const std::string& message) const;
+  void WriteResponse(const cmServerResponse& response) const;
+  void WriteParseError(const std::string& message) const;
+
+  void WriteJsonObject(Json::Value const& jsonValue) const;
+
+  static cmServerProtocol* FindMatchingProtocol(
+    const std::vector<cmServerProtocol*>& protocols, int major, int minor);
+
+  cmServerProtocol* Protocol = nullptr;
+  std::vector<cmServerProtocol*> SupportedProtocols;
+  std::vector<std::string> Queue;
+
+  std::string DataBuffer;
+  std::string JsonData;
+
+  uv_loop_t* Loop = nullptr;
+
+  typedef union
+  {
+    uv_tty_t tty;
+    uv_pipe_t pipe;
+  } InOutUnion;
+
+  InOutUnion Input;
+  InOutUnion Output;
+  uv_stream_t* InputStream = nullptr;
+  uv_stream_t* OutputStream = nullptr;
+
+  mutable bool Writing = false;
+
+  friend class cmServerRequest;
+};
diff --git a/Source/cmServerProtocol.cxx b/Source/cmServerProtocol.cxx
new file mode 100644
index 0000000..659aa0f
--- /dev/null
+++ b/Source/cmServerProtocol.cxx
@@ -0,0 +1,129 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2016 Tobias Hunger <tobias.hun...@qt.io>
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+
+#include "cmServerProtocol.h"
+
+#include "cmExternalMakefileProjectGenerator.h"
+#include "cmServer.h"
+#include "cmake.h"
+
+#if defined(CMAKE_BUILD_WITH_CMAKE)
+#include "cm_jsoncpp_reader.h"
+#include "cm_jsoncpp_value.h"
+#endif
+
+namespace {
+// Vocabulary:
+
+const std::string kCOOKIE_KEY = "cookie";
+const std::string kTYPE_KEY = "type";
+
+} // namespace
+
+cmServerRequest::cmServerRequest(cmServer* server, const std::string& t,
+                                 const std::string& c, const Json::Value& d)
+  : Type(t)
+  , Cookie(c)
+  , Data(d)
+  , m_Server(server)
+{
+}
+
+void cmServerRequest::ReportProgress(int min, int current, int max,
+                                     const std::string& message) const
+{
+  this->m_Server->WriteProgress(*this, min, current, max, message);
+}
+
+cmServerResponse cmServerRequest::Reply(const Json::Value& data) const
+{
+  cmServerResponse response(*this);
+  response.SetData(data);
+  return response;
+}
+
+cmServerResponse cmServerRequest::ReportError(const std::string& message) const
+{
+  cmServerResponse response(*this);
+  response.SetError(message);
+  return response;
+}
+
+cmServerResponse::cmServerResponse(const cmServerRequest& request)
+  : Type(request.Type)
+  , Cookie(request.Cookie)
+{
+}
+
+void cmServerResponse::SetData(const Json::Value& data)
+{
+  assert(this->m_Payload == PAYLOAD_UNKNOWN);
+  if (!data[kCOOKIE_KEY].isNull() || !data[kTYPE_KEY].isNull()) {
+    this->SetError("Response contains cookie or type field.");
+    return;
+  }
+  this->m_Payload = PAYLOAD_DATA;
+  this->m_Data = data;
+}
+
+void cmServerResponse::SetError(const std::string& message)
+{
+  assert(this->m_Payload == PAYLOAD_UNKNOWN);
+  this->m_Payload = PAYLOAD_ERROR;
+  this->m_ErrorMessage = message;
+}
+
+bool cmServerResponse::IsComplete() const
+{
+  return this->m_Payload != PAYLOAD_UNKNOWN;
+}
+
+bool cmServerResponse::IsError() const
+{
+  assert(this->m_Payload != PAYLOAD_UNKNOWN);
+  return this->m_Payload == PAYLOAD_ERROR;
+}
+
+std::string cmServerResponse::ErrorMessage() const
+{
+  if (this->m_Payload == PAYLOAD_ERROR)
+    return this->m_ErrorMessage;
+  else
+    return std::string();
+}
+
+Json::Value cmServerResponse::Data() const
+{
+  assert(this->m_Payload != PAYLOAD_UNKNOWN);
+  return this->m_Data;
+}
+
+bool cmServerProtocol::Activate(const cmServerRequest& request,
+                                std::string* errorMessage)
+{
+  this->m_CMakeInstance = std::make_unique<cmake>();
+  const bool result = this->DoActivate(request, errorMessage);
+  if (!result)
+    this->m_CMakeInstance = CM_NULLPTR;
+  return result;
+}
+
+cmake* cmServerProtocol::CMakeInstance() const
+{
+  return this->m_CMakeInstance.get();
+}
+
+bool cmServerProtocol::DoActivate(const cmServerRequest& /*request*/,
+                                  std::string* /*errorMessage*/)
+{
+  return true;
+}
diff --git a/Source/cmServerProtocol.h b/Source/cmServerProtocol.h
new file mode 100644
index 0000000..e086f72
--- /dev/null
+++ b/Source/cmServerProtocol.h
@@ -0,0 +1,97 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2016 Tobias Hunger <tobias.hun...@qt.io>
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+
+#pragma once
+
+#include "cmListFileCache.h"
+
+#if defined(CMAKE_BUILD_WITH_CMAKE)
+#include "cm_jsoncpp_writer.h"
+#endif
+
+#include <memory>
+#include <string>
+
+class cmake;
+class cmServer;
+
+class cmServerRequest;
+
+class cmServerResponse
+{
+public:
+  explicit cmServerResponse(const cmServerRequest& request);
+
+  void SetData(const Json::Value& data);
+  void SetError(const std::string& message);
+
+  bool IsComplete() const;
+  bool IsError() const;
+  std::string ErrorMessage() const;
+  Json::Value Data() const;
+
+  const std::string Type;
+  const std::string Cookie;
+
+private:
+  enum PayLoad
+  {
+    PAYLOAD_UNKNOWN,
+    PAYLOAD_ERROR,
+    PAYLOAD_DATA
+  };
+  PayLoad m_Payload = PAYLOAD_UNKNOWN;
+  std::string m_ErrorMessage;
+  Json::Value m_Data;
+};
+
+class cmServerRequest
+{
+public:
+  void ReportProgress(int min, int current, int max,
+                      const std::string& message) const;
+
+  cmServerResponse Reply(const Json::Value& data) const;
+  cmServerResponse ReportError(const std::string& message) const;
+
+  const std::string Type;
+  const std::string Cookie;
+  const Json::Value Data;
+
+private:
+  cmServerRequest(cmServer* server, const std::string& t, const std::string& c,
+                  const Json::Value& d);
+
+  cmServer* m_Server;
+
+  friend class cmServer;
+};
+
+class cmServerProtocol
+{
+public:
+  virtual ~cmServerProtocol() {}
+
+  virtual std::pair<int, int> ProtocolVersion() const = 0;
+  virtual const cmServerResponse Process(const cmServerRequest& request) = 0;
+
+  bool Activate(const cmServerRequest& request, std::string* errorMessage);
+
+protected:
+  cmake* CMakeInstance() const;
+  // Implement protocol specific activation tasks here. Called from Activate().
+  virtual bool DoActivate(const cmServerRequest& request,
+                          std::string* errorMessage);
+
+private:
+  std::unique_ptr<cmake> m_CMakeInstance;
+};
diff --git a/Source/cmcmd.cxx b/Source/cmcmd.cxx
index 3b385ab..c09ea8b 100644
--- a/Source/cmcmd.cxx
+++ b/Source/cmcmd.cxx
@@ -23,6 +23,10 @@
 #include "cm_auto_ptr.hxx"
 #include "cmake.h"
 
+#if defined(HAVE_SERVER_MODE) && HAVE_SERVER_MODE
+#include "cmServer.h"
+#endif
+
 #if defined(CMAKE_BUILD_WITH_CMAKE)
 #include "cmDependsFortran.h" // For -E cmake_copy_f90_mod callback.
 #endif
@@ -91,6 +95,7 @@ void CMakeCommandUsage(const char* program)
     << "  remove_directory dir      - remove a directory and its contents\n"
     << "  rename oldname newname    - rename a file or directory "
        "(on one volume)\n"
+    << "  server                    - start cmake in server mode\n"
     << "  sleep <number>...         - sleep for given number of seconds\n"
     << "  tar [cxt][vf][zjJ] file.tar [file/dir1 file/dir2 ...]\n"
     << "                            - create or extract a tar or zip archive\n"
@@ -907,6 +912,19 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string>& 
args)
 #endif
       }
       return 0;
+    } else if (args[1] == "server") {
+      if (args.size() > 2) {
+        cmSystemTools::Error("Too many arguments to start server mode");
+        return 1;
+      }
+#if defined(HAVE_SERVER_MODE) && HAVE_SERVER_MODE
+      cmServer server;
+      server.Serve();
+      return 0;
+#else
+      cmSystemTools::Error("CMake was not built with server mode enabled");
+      return 1;
+#endif
     }
 
 #if defined(CMAKE_BUILD_WITH_CMAKE)
diff --git a/Tests/RunCMake/CommandLine/E_server-arg-result.txt 
b/Tests/RunCMake/CommandLine/E_server-arg-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/CommandLine/E_server-arg-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/CommandLine/E_server-arg-stderr.txt 
b/Tests/RunCMake/CommandLine/E_server-arg-stderr.txt
new file mode 100644
index 0000000..7877c01
--- /dev/null
+++ b/Tests/RunCMake/CommandLine/E_server-arg-stderr.txt
@@ -0,0 +1 @@
+^CMake Error: Too many arguments to start server mode$
diff --git a/Tests/RunCMake/CommandLine/RunCMakeTest.cmake 
b/Tests/RunCMake/CommandLine/RunCMakeTest.cmake
index 6ae47a8..9f76ad9 100644
--- a/Tests/RunCMake/CommandLine/RunCMakeTest.cmake
+++ b/Tests/RunCMake/CommandLine/RunCMakeTest.cmake
@@ -12,6 +12,7 @@ run_cmake_command(E_capabilities ${CMAKE_COMMAND} -E 
capabilities)
 run_cmake_command(E_capabilities-arg ${CMAKE_COMMAND} -E capabilities 
--extra-arg)
 run_cmake_command(E_echo_append ${CMAKE_COMMAND} -E echo_append)
 run_cmake_command(E_rename-no-arg ${CMAKE_COMMAND} -E rename)
+run_cmake_command(E_server-arg ${CMAKE_COMMAND} -E server --extra-arg)
 run_cmake_command(E_touch_nocreate-no-arg ${CMAKE_COMMAND} -E touch_nocreate)
 
 run_cmake_command(E_time ${CMAKE_COMMAND} -E time ${CMAKE_COMMAND} -E echo 
"hello  world")

https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=cd049f012ef22f8f1214b35e351fda823d534b92
commit cd049f012ef22f8f1214b35e351fda823d534b92
Author:     Tobias Hunger <tobias.hun...@qt.io>
AuthorDate: Tue Sep 13 11:05:39 2016 +0200
Commit:     Brad King <brad.k...@kitware.com>
CommitDate: Mon Sep 19 08:57:28 2016 -0400

    cmake-server: Report server mode availablitily in Capabilities
    
    Report the availability of the server-mode in the output of
    cmake -E capabilities.

diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 112a5f7..0c84283 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -234,7 +234,7 @@ cmake::~cmake()
 }
 
 #if defined(CMAKE_BUILD_WITH_CMAKE)
-Json::Value cmake::ReportCapabilitiesJson() const
+Json::Value cmake::ReportCapabilitiesJson(bool haveServerMode) const
 {
   Json::Value obj = Json::objectValue;
   // Version information:
@@ -280,22 +280,18 @@ Json::Value cmake::ReportCapabilitiesJson() const
     generators.append(i->second);
   }
   obj["generators"] = generators;
+  obj["serverMode"] = haveServerMode;
 
-#if defined(HAVE_SERVER_MODE) && HAVE_SERVER_MODE
-  obj["serverMode"] = true;
-#else
-  obj["serverMode"] = false;
-#endif
   return obj;
 }
 #endif
 
-std::string cmake::ReportCapabilities() const
+std::string cmake::ReportCapabilities(bool haveServerMode) const
 {
   std::string result;
 #if defined(CMAKE_BUILD_WITH_CMAKE)
   Json::FastWriter writer;
-  result = writer.write(this->ReportCapabilitiesJson());
+  result = writer.write(this->ReportCapabilitiesJson(haveServerMode));
 #else
   result = "Not supported";
 #endif
diff --git a/Source/cmake.h b/Source/cmake.h
index 6095a59..a21c9ca 100644
--- a/Source/cmake.h
+++ b/Source/cmake.h
@@ -123,9 +123,9 @@ public:
   ~cmake();
 
 #if defined(CMAKE_BUILD_WITH_CMAKE)
-  Json::Value ReportCapabilitiesJson() const;
+  Json::Value ReportCapabilitiesJson(bool haveServerMode) const;
 #endif
-  std::string ReportCapabilities() const;
+  std::string ReportCapabilities(bool haveServerMode) const;
 
   static const char* GetCMakeFilesDirectory() { return "/CMakeFiles"; }
   static const char* GetCMakeFilesDirectoryPostSlash()
diff --git a/Source/cmcmd.cxx b/Source/cmcmd.cxx
index 900bba0..3b385ab 100644
--- a/Source/cmcmd.cxx
+++ b/Source/cmcmd.cxx
@@ -527,7 +527,11 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string>& 
args)
         return 1;
       }
       cmake cm;
-      std::cout << cm.ReportCapabilities();
+#if defined(HAVE_SERVER_MODE) && HAVE_SERVER_MODE
+      std::cout << cm.ReportCapabilities(true);
+#else
+      std::cout << cm.ReportCapabilities(false);
+#endif
       return 0;
     }
 

-----------------------------------------------------------------------

Summary of changes:


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