From: Omar Sandoval <osan...@fb.com>
The C libbtrfsutil library isn't very useful for scripting, so we also
want bindings for Python. Writing unit tests in Python is also much
easier than doing so in C. Only Python 3 is supported; if someone really
wants Python 2 support, they can write their own bindings. This commit
is just the scaffolding.
Signed-off-by: Omar Sandoval <osan...@fb.com>
---
INSTALL | 4 +
Makefile | 36 ++++++
Makefile.inc.in | 2 +
configure.ac | 15 +++
libbtrfsutil/README.md | 5 +-
libbtrfsutil/python/.gitignore | 7 ++
libbtrfsutil/python/btrfsutilpy.h | 57 ++++++++++
libbtrfsutil/python/error.c | 202 ++++++++++++++++++++++++++++++++++
libbtrfsutil/python/module.c | 166 ++++++++++++++++++++++++++++
libbtrfsutil/python/setup.py | 100 +++++++++++++++++
libbtrfsutil/python/tests/__init__.py | 0
11 files changed, 593 insertions(+), 1 deletion(-)
create mode 100644 libbtrfsutil/python/.gitignore
create mode 100644 libbtrfsutil/python/btrfsutilpy.h
create mode 100644 libbtrfsutil/python/error.c
create mode 100644 libbtrfsutil/python/module.c
create mode 100755 libbtrfsutil/python/setup.py
create mode 100644 libbtrfsutil/python/tests/__init__.py
diff --git a/INSTALL b/INSTALL
index 819b92ea..24d6e24f 100644
--- a/INSTALL
+++ b/INSTALL
@@ -41,6 +41,10 @@ To build from the released tarballs:
$ make
$ make install
+To install the libbtrfsutil Python bindings:
+
+ $ make install_python
+
You may disable building some parts like documentation, btrfs-convert or
backtrace support. See ./configure --help for more.
diff --git a/Makefile b/Makefile
index 062f7f3c..02b03e81 100644
--- a/Makefile
+++ b/Makefile
@@ -144,8 +144,10 @@ endif
ifeq ($(BUILD_VERBOSE),1)
Q =
+ SETUP_PY_Q =
else
Q = @
+ SETUP_PY_Q = -q
endif
ifeq ("$(origin D)", "command line")
@@ -293,6 +295,9 @@ endif
$($(subst -,_,btrfs-$(@:%/$(notdir $@)=%)-cflags))
all: $(progs) $(libs) $(lib_links) $(BUILDDIRS)
+ifeq ($(PYTHON_BINDINGS),1)
+all: libbtrfsutil_python
+endif
$(SUBDIRS): $(BUILDDIRS)
$(BUILDDIRS):
@echo "Making all in $(patsubst build-%,%,$@)"
@@ -336,6 +341,16 @@ test-inst: all
test: test-fsck test-mkfs test-convert test-misc test-fuzz test-cli
+ifeq ($(PYTHON_BINDINGS),1)
+test-libbtrfsutil: libbtrfsutil_python
+ $(Q)cd libbtrfsutil/python; \
+ LD_LIBRARY_PATH=../.. $(PYTHON) -m unittest discover -v tests
+
+.PHONY: test-libbtrfsutil
+
+test: test-libbtrfsutil
+endif
+
#
# NOTE: For static compiles, you need to have all the required libs
# static equivalent available
@@ -382,6 +397,15 @@ libbtrfsutil.so.0 libbtrfsutil.so:
libbtrfsutil.so.$(libbtrfsutil_version)
@echo " [LN] $@"
$(Q)$(LN_S) -f $< $@
+ifeq ($(PYTHON_BINDINGS),1)
+libbtrfsutil_python: libbtrfsutil.so
+ @echo " [PY] libbtrfsutil"
+ $(Q)cd libbtrfsutil/python; \
+ CFLAGS= LDFLAGS= $(PYTHON) setup.py $(SETUP_PY_Q) build_ext -i
build
+
+.PHONY: libbtrfsutil_python
+endif
+
# keep intermediate files from the below implicit rules around
.PRECIOUS: $(addsuffix .o,$(progs))
@@ -565,6 +589,10 @@ clean: $(CLEANDIRS)
$(libs) $(lib_links) \
$(progs_static) $(progs_extra) \
libbtrfsutil/*.o libbtrfsutil/*.o.d
+ifeq ($(PYTHON_BINDINGS),1)
+ $(Q)cd libbtrfsutil/python; \
+ $(PYTHON) setup.py $(SETUP_PY_Q) clean -a
+endif
clean-doc:
@echo "Cleaning Documentation"
@@ -599,6 +627,14 @@ ifneq ($(udevdir),)
$(INSTALL) -m644 $(udev_rules) $(DESTDIR)$(udevruledir)
endif
+ifeq ($(PYTHON_BINDINGS),1)
+install_python: libbtrfsutil_python
+ $(Q)cd libbtrfsutil/python; \
+ $(PYTHON) setup.py install --skip-build $(if $(DESTDIR),--root
$(DESTDIR)) --prefix $(prefix)
+
+.PHONY: install_python
+endif
+
install-static: $(progs_static) $(INSTALLDIRS)
$(INSTALL) -m755 -d $(DESTDIR)$(bindir)
$(INSTALL) $(progs_static) $(DESTDIR)$(bindir)
diff --git a/Makefile.inc.in b/Makefile.inc.in
index 56271903..408e00d2 100644
--- a/Makefile.inc.in
+++ b/Makefile.inc.in
@@ -14,6 +14,8 @@ DISABLE_BTRFSCONVERT = @DISABLE_BTRFSCONVERT@
BTRFSCONVERT_EXT2 = @BTRFSCONVERT_EXT2@
BTRFSCONVERT_REISERFS = @BTRFSCONVERT_REISERFS@
BTRFSRESTORE_ZSTD = @BTRFSRESTORE_ZSTD@
+PYTHON_BINDINGS = @PYTHON_BINDINGS@
+PYTHON = @PYTHON@
SUBST_CFLAGS = @CFLAGS@
SUBST_LDFLAGS = @LDFLAGS@
diff --git a/configure.ac b/configure.ac
index 290dc1d5..5e2905d5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -199,6 +199,19 @@ fi
AS_IF([test "x$enable_zstd" = xyes], [BTRFSRESTORE_ZSTD=1],
[BTRFSRESTORE_ZSTD=0])
AC_SUBST(BTRFSRESTORE_ZSTD)
+AC_ARG_ENABLE([python],
+ AS_HELP_STRING([--disable-python], [do not build libbtrfsutil Python
bindings]),
+ [], [enable_python=yes]
+)
+
+if test "x$enable_python" = xyes; then
+ AM_PATH_PYTHON([3.4])
+fi
+
+AS_IF([test "x$enable_python" = xyes], [PYTHON_BINDINGS=1],
[PYTHON_BINDINGS=0])
+AC_SUBST(PYTHON_BINDINGS)
+AC_SUBST(PYTHON)
+
# udev v190 introduced the btrfs builtin and a udev rule to use it.
# Our udev rule gives us the friendly dm names but isn't required (or valid)
# on earlier releases.
@@ -253,6 +266,8 @@ AC_MSG_RESULT([
backtrace support: ${enable_backtrace}
btrfs-convert: ${enable_convert} ${convertfs:+($convertfs)}
btrfs-restore zstd: ${enable_zstd}
+ Python bindings: ${enable_python}
+ Python interpreter: ${PYTHON}
Type 'make' to compile.
])
diff --git a/libbtrfsutil/README.md b/libbtrfsutil/README.md
index 2bc9a0a7..eed8102d 100644
--- a/libbtrfsutil/README.md
+++ b/libbtrfsutil/README.md
@@ -3,7 +3,8 @@ libbtrfsutil
libbtrfsutil is a library for managing Btrfs filesystems. It is licensed under
the LGPL. libbtrfsutil provides interfaces for a subset of the operations
-offered by the `btrfs` command line utility.
+offered by the `btrfs` command line utility. It also includes official Python
+bindings (Python 3 only).
Development
-----------
@@ -27,6 +28,8 @@ A few guidelines:
* Don't require the Btrfs UAPI headers for any interfaces (e.g., instead of
directly exposing a type from `linux/btrfs_tree.h`, abstract it away in a
type specific to `libbtrfsutil`)
+* Include Python bindings for all interfaces
+* Write tests for all interfaces
* Preserve API and ABI compatability at all times
* Bump the libbtrfsutil version once for every release where the library
changes (this is mostly on the maintainers)
diff --git a/libbtrfsutil/python/.gitignore b/libbtrfsutil/python/.gitignore
new file mode 100644
index 00000000..d050ff7c
--- /dev/null
+++ b/libbtrfsutil/python/.gitignore
@@ -0,0 +1,7 @@
+__pycache__
+*.pyc
+/btrfsutil.egg-info
+/btrfsutil*.so
+/build
+/constants.c
+/dist
diff --git a/libbtrfsutil/python/btrfsutilpy.h
b/libbtrfsutil/python/btrfsutilpy.h
new file mode 100644
index 00000000..6d82f7e1
--- /dev/null
+++ b/libbtrfsutil/python/btrfsutilpy.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2018 Facebook
+ *
+ * This file is part of libbtrfsutil.
+ *
+ * libbtrfsutil is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * libbtrfsutil is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with libbtrfsutil. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef BTRFSUTILPY_H
+#define BTRFSUTILPY_H
+
+#define PY_SSIZE_T_CLEAN
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <Python.h>
+#include "structmember.h"
+
+#include <btrfsutil.h>
+
+extern PyTypeObject BtrfsUtilError_type;
+
+/*
+ * Helpers for path arguments based on posixmodule.c in CPython.
+ */
+struct path_arg {
+ bool allow_fd;
+ char *path;
+ int fd;
+ Py_ssize_t length;
+ PyObject *object;
+ PyObject *cleanup;
+};
+int path_converter(PyObject *o, void *p);
+void path_cleanup(struct path_arg *path);
+
+void SetFromBtrfsUtilError(enum btrfs_util_error err);
+void SetFromBtrfsUtilErrorWithPath(enum btrfs_util_error err,
+ struct path_arg *path);
+void SetFromBtrfsUtilErrorWithPaths(enum btrfs_util_error err,
+ struct path_arg *path1,
+ struct path_arg *path2);
+
+void add_module_constants(PyObject *m);
+
+#endif /* BTRFSUTILPY_H */
diff --git a/libbtrfsutil/python/error.c b/libbtrfsutil/python/error.c
new file mode 100644
index 00000000..0876c9b4
--- /dev/null
+++ b/libbtrfsutil/python/error.c
@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2018 Facebook
+ *
+ * This file is part of libbtrfsutil.
+ *
+ * libbtrfsutil is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * libbtrfsutil is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with libbtrfsutil. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "btrfsutilpy.h"
+
+typedef struct {
+ PyOSErrorObject os_error;
+ PyObject *btrfsutilerror;
+} BtrfsUtilError;
+
+void SetFromBtrfsUtilError(enum btrfs_util_error err)
+{
+ SetFromBtrfsUtilErrorWithPaths(err, NULL, NULL);
+}
+
+void SetFromBtrfsUtilErrorWithPath(enum btrfs_util_error err,
+ struct path_arg *path1)
+{
+ SetFromBtrfsUtilErrorWithPaths(err, path1, NULL);
+}
+
+void SetFromBtrfsUtilErrorWithPaths(enum btrfs_util_error err,
+ struct path_arg *path1,
+ struct path_arg *path2)
+{
+ PyObject *strobj, *args, *exc;
+ int i = errno;
+ const char *str1 = btrfs_util_strerror(err), *str2 = strerror(i);
+
+ if (str1 && str2 && strcmp(str1, str2) != 0) {
+ strobj = PyUnicode_FromFormat("%s: %s", str1, str2);
+ } else if (str1) {
+ strobj = PyUnicode_FromString(str1);
+ } else if (str2) {
+ strobj = PyUnicode_FromString(str2);
+ } else {
+ Py_INCREF(Py_None);
+ strobj = Py_None;
+ }
+ if (strobj == NULL)
+ return;
+
+ args = Py_BuildValue("iOOOOi", i, strobj,
+ path1 ? path1->object : Py_None, Py_None,
+ path2 ? path2->object : Py_None, (int)err);
+ Py_DECREF(strobj);
+ if (args == NULL)
+ return;
+
+ exc = PyObject_CallObject((PyObject *)&BtrfsUtilError_type, args);
+ Py_DECREF(args);
+ if (exc == NULL)
+ return;
+
+ PyErr_SetObject((PyObject *)&BtrfsUtilError_type, exc);
+ Py_DECREF(exc);
+}
+
+static int BtrfsUtilError_clear(BtrfsUtilError *self)
+{
+ Py_CLEAR(self->btrfsutilerror);
+ return Py_TYPE(self)->tp_base->tp_clear((PyObject *)self);
+}
+
+static void BtrfsUtilError_dealloc(BtrfsUtilError *self)
+{
+ PyObject_GC_UnTrack(self);
+ BtrfsUtilError_clear(self);
+ Py_TYPE(self)->tp_free((PyObject *)self);
+}
+
+static int BtrfsUtilError_traverse(BtrfsUtilError *self, visitproc visit,
+ void *arg)
+{
+ Py_VISIT(self->btrfsutilerror);
+ return Py_TYPE(self)->tp_base->tp_traverse((PyObject *)self, visit,
arg);
+}
+
+static PyObject *BtrfsUtilError_new(PyTypeObject *type, PyObject *args,
+ PyObject *kwds)
+{
+ BtrfsUtilError *self;
+ PyObject *oserror_args = args;
+
+ if (PyTuple_Check(args) && PyTuple_GET_SIZE(args) == 6) {
+ oserror_args = PyTuple_GetSlice(args, 0, 5);
+ if (oserror_args == NULL)
+ return NULL;
+ }
+
+ self = (BtrfsUtilError *)type->tp_base->tp_new(type, oserror_args,
+ kwds);
+ if (oserror_args != args)
+ Py_DECREF(oserror_args);
+ if (self == NULL)
+ return NULL;
+
+ if (PyTuple_Check(args) && PyTuple_GET_SIZE(args) == 6) {
+ self->btrfsutilerror = PyTuple_GET_ITEM(args, 5);
+ Py_INCREF(self->btrfsutilerror);
+ }
+
+ return (PyObject *)self;
+}
+
+static PyObject *BtrfsUtilError_str(BtrfsUtilError *self)
+{
+#define OR_NONE(x) ((x) ? (x) : Py_None)
+ if (self->btrfsutilerror) {
+ if (self->os_error.filename) {
+ if (self->os_error.filename2) {
+ return PyUnicode_FromFormat("[BtrfsUtilError %S
Errno %S] %S: %R -> %R",
+
OR_NONE(self->btrfsutilerror),
+
OR_NONE(self->os_error.myerrno),
+
OR_NONE(self->os_error.strerror),
+
self->os_error.filename,
+
self->os_error.filename2);
+ } else {
+ return PyUnicode_FromFormat("[BtrfsUtilError %S
Errno %S] %S: %R",
+
OR_NONE(self->btrfsutilerror),
+
OR_NONE(self->os_error.myerrno),
+
OR_NONE(self->os_error.strerror),
+
self->os_error.filename);
+ }
+ }
+ if (self->os_error.myerrno && self->os_error.strerror) {
+ return PyUnicode_FromFormat("[BtrfsUtilError %S Errno
%S] %S",
+ self->btrfsutilerror,
+ self->os_error.myerrno,
+ self->os_error.strerror);
+ }
+ }
+ return Py_TYPE(self)->tp_base->tp_str((PyObject *)self);
+#undef OR_NONE
+}
+
+static PyMemberDef BtrfsUtilError_members[] = {
+ {"btrfsutilerror", T_OBJECT,
+ offsetof(BtrfsUtilError, btrfsutilerror), 0,
+ "btrfsutil error code"},
+ {},
+};
+
+#define BtrfsUtilError_DOC \
+ "Btrfs operation error."
+
+PyTypeObject BtrfsUtilError_type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "btrfsutil.BtrfsUtilError", /* tp_name */
+ sizeof(BtrfsUtilError), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ (destructor)BtrfsUtilError_dealloc, /* tp_dealloc */
+ NULL, /* tp_print */
+ NULL, /* tp_getattr */
+ NULL, /* tp_setattr */
+ NULL, /* tp_as_async */
+ NULL, /* tp_repr */
+ NULL, /* tp_as_number */
+ NULL, /* tp_as_sequence */
+ NULL, /* tp_as_mapping */
+ NULL, /* tp_hash */
+ NULL, /* tp_call */
+ (reprfunc)BtrfsUtilError_str, /* tp_str */
+ NULL, /* tp_getattro */
+ NULL, /* tp_setattro */
+ NULL, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /*
tp_flags */
+ BtrfsUtilError_DOC, /* tp_doc */
+ (traverseproc)BtrfsUtilError_traverse, /* tp_traverse */
+ (inquiry)BtrfsUtilError_clear, /* tp_clear */
+ NULL, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ NULL, /* tp_iter */
+ NULL, /* tp_iternext */
+ NULL, /* tp_methods */
+ BtrfsUtilError_members, /* tp_members */
+ NULL, /* tp_getset */
+ NULL, /* tp_base */
+ NULL, /* tp_dict */
+ NULL, /* tp_descr_get */
+ NULL, /* tp_descr_set */
+ offsetof(BtrfsUtilError, os_error.dict), /* tp_dictoffset */
+ NULL, /* tp_init */
+ NULL, /* tp_alloc */
+ BtrfsUtilError_new, /* tp_new */
+};
diff --git a/libbtrfsutil/python/module.c b/libbtrfsutil/python/module.c
new file mode 100644
index 00000000..d7398808
--- /dev/null
+++ b/libbtrfsutil/python/module.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2018 Facebook
+ *
+ * This file is part of libbtrfsutil.
+ *
+ * libbtrfsutil is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * libbtrfsutil is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with libbtrfsutil. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "btrfsutilpy.h"
+
+static int fd_converter(PyObject *o, void *p)
+{
+ int *fd = p;
+ long tmp;
+ int overflow;
+
+ tmp = PyLong_AsLongAndOverflow(o, &overflow);
+ if (tmp == -1 && PyErr_Occurred())
+ return 0;
+ if (overflow > 0 || tmp > INT_MAX) {
+ PyErr_SetString(PyExc_OverflowError,
+ "fd is greater than maximum");
+ return 0;
+ }
+ if (overflow < 0 || tmp < 0) {
+ PyErr_SetString(PyExc_ValueError, "fd is negative");
+ return 0;
+ }
+ *fd = tmp;
+ return 1;
+}
+
+int path_converter(PyObject *o, void *p)
+{
+ struct path_arg *path = p;
+ int is_index, is_bytes, is_unicode;
+ PyObject *bytes = NULL;
+ Py_ssize_t length = 0;
+ char *tmp;
+
+ if (o == NULL) {
+ path_cleanup(p);
+ return 1;
+ }
+
+ path->object = path->cleanup = NULL;
+ Py_INCREF(o);
+
+ path->fd = -1;
+
+ is_index = path->allow_fd && PyIndex_Check(o);
+ is_bytes = PyBytes_Check(o);
+ is_unicode = PyUnicode_Check(o);
+
+ if (!is_index && !is_bytes && !is_unicode) {
+ _Py_IDENTIFIER(__fspath__);
+ PyObject *func;
+
+ func = _PyObject_LookupSpecial(o, &PyId___fspath__);
+ if (func == NULL)
+ goto err_format;
+ Py_DECREF(o);
+ o = PyObject_CallFunctionObjArgs(func, NULL);
+ Py_DECREF(func);
+ if (o == NULL)
+ return 0;
+ is_bytes = PyBytes_Check(o);
+ is_unicode = PyUnicode_Check(o);
+ }
+
+ if (is_unicode) {
+ if (!PyUnicode_FSConverter(o, &bytes))
+ goto err;
+ } else if (is_bytes) {
+ bytes = o;
+ Py_INCREF(bytes);
+ } else if (is_index) {
+ if (!fd_converter(o, &path->fd))
+ goto err;
+ path->path = NULL;
+ goto out;
+ } else {
+err_format:
+ PyErr_Format(PyExc_TypeError, "expected %s, not %s",
+ path->allow_fd ? "string, bytes, os.PathLike, or
integer" :
+ "string, bytes, or os.PathLike",
+ Py_TYPE(o)->tp_name);
+ goto err;
+ }
+
+ length = PyBytes_GET_SIZE(bytes);
+ tmp = PyBytes_AS_STRING(bytes);
+ if ((size_t)length != strlen(tmp)) {
+ PyErr_SetString(PyExc_TypeError,
+ "path has embedded nul character");
+ goto err;
+ }
+
+ path->path = tmp;
+ if (bytes == o)
+ Py_DECREF(bytes);
+ else
+ path->cleanup = bytes;
+ path->fd = -1;
+
+out:
+ path->length = length;
+ path->object = o;
+ return Py_CLEANUP_SUPPORTED;
+
+err:
+ Py_XDECREF(o);
+ Py_XDECREF(bytes);
+ return 0;
+}
+
+void path_cleanup(struct path_arg *path)
+{
+ Py_CLEAR(path->object);
+ Py_CLEAR(path->cleanup);
+}
+
+static PyMethodDef btrfsutil_methods[] = {
+ {},
+};
+
+static struct PyModuleDef btrfsutilmodule = {
+ PyModuleDef_HEAD_INIT,
+ "btrfsutil",
+ "Library for managing Btrfs filesystems",
+ -1,
+ btrfsutil_methods,
+};
+
+PyMODINIT_FUNC
+PyInit_btrfsutil(void)
+{
+ PyObject *m;
+
+ BtrfsUtilError_type.tp_base = (PyTypeObject *)PyExc_OSError;
+ if (PyType_Ready(&BtrfsUtilError_type) < 0)
+ return NULL;
+
+ m = PyModule_Create(&btrfsutilmodule);
+ if (!m)
+ return NULL;
+
+ Py_INCREF(&BtrfsUtilError_type);
+ PyModule_AddObject(m, "BtrfsUtilError",
+ (PyObject *)&BtrfsUtilError_type);
+
+ add_module_constants(m);
+
+ return m;
+}
diff --git a/libbtrfsutil/python/setup.py b/libbtrfsutil/python/setup.py
new file mode 100755
index 00000000..3dc778ab
--- /dev/null
+++ b/libbtrfsutil/python/setup.py
@@ -0,0 +1,100 @@
+#!/usr/bin/env python3
+
+# Copyright (C) 2018 Facebook
+#
+# This file is part of libbtrfsutil.
+#
+# libbtrfsutil is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# libbtrfsutil is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with libbtrfsutil. If not, see <http://www.gnu.org/licenses/>.
+
+import re
+import os
+import os.path
+from setuptools import setup, Extension
+from setuptools.command.build_ext import build_ext
+import subprocess
+
+
+def out_of_date(dependencies, target):
+ dependency_mtimes = [os.path.getmtime(dependency) for dependency in
dependencies]
+ try:
+ target_mtime = os.path.getmtime(target)
+ except OSError:
+ return True
+ return any(dependency_mtime >= target_mtime for dependency_mtime in
dependency_mtimes)
+
+
+def gen_constants():
+ with open('../btrfsutil.h', 'r') as f:
+ btrfsutil_h = f.read()
+
+ constants = re.findall(
+ r'^\s*(BTRFS_UTIL_ERROR_[a-zA-Z0-9_]+)',
+ btrfsutil_h, flags=re.MULTILINE)
+
+ with open('constants.c', 'w') as f:
+ f.write("""\
+#include <btrfsutil.h>
+#include "btrfsutilpy.h"
+
+void add_module_constants(PyObject *m)
+{
+""")
+ for constant in constants:
+ assert constant.startswith('BTRFS_UTIL_')
+ name = constant[len('BTRFS_UTIL_'):]
+ f.write('\tPyModule_AddIntConstant(m, "{}", {});\n'.format(name,
constant))
+ f.write("""\
+}
+""")
+
+
+class my_build_ext(build_ext):
+ def run(self):
+ if out_of_date(['../btrfsutil.h'], 'constants.c'):
+ try:
+ gen_constants()
+ except Exception as e:
+ try:
+ os.remove('constants.c')
+ except OSError:
+ pass
+ raise e
+ super().run()
+
+
+module = Extension(
+ name='btrfsutil',
+ sources=[
+ 'constants.c',
+ 'error.c',
+ 'module.c',
+ ],
+ include_dirs=['..'],
+ library_dirs=['../..'],
+ libraries=['btrfsutil'],
+)
+
+
+version = subprocess.check_output(
+ ['./version.sh', '--configure'], cwd='../..').decode('utf-8')
+version = re.match(r'v(\d+(?:\.\d+)*)', version).group(1)
+
+setup(
+ name='btrfsutil',
+ version=version,
+ description='Library for managing Btrfs filesystems',
+ url='https://github.com/kdave/btrfs-progs',
+ cmdclass={'build_ext': my_build_ext},
+ ext_modules=[module],
+)
diff --git a/libbtrfsutil/python/tests/__init__.py
b/libbtrfsutil/python/tests/__init__.py
new file mode 100644
index 00000000..e69de29b
--
2.16.1
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