From: Lukas Funke <lukas.fu...@weidmueller.com>
Signed-off-by: Lukas Funke <lukas.fu...@weidmueller.com>
Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsme...@weidmueller.com>
---
meta/classes/go-vendor.bbclass | 68 ++++++++++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
create mode 100644 meta/classes/go-vendor.bbclass
diff --git a/meta/classes/go-vendor.bbclass b/meta/classes/go-vendor.bbclass
new file mode 100644
index 0000000000..a1a740a1fc
--- /dev/null
+++ b/meta/classes/go-vendor.bbclass
@@ -0,0 +1,68 @@
+# Copyright 2022 (C) Weidmueller GmbH & Co KG
+# Author: Lukas Funke <lukas.fu...@weidmueller.com>
+#
+# Handle Go vendor support for offline builds
+#
+# When importing Go modules, Go downloads the imported module using
+# a network (proxy) connection ahead of the compile stage. This contradicts
+# the yocto build concept of fetching every source ahead of build-time
+# and supporting offline builds.
+#
+# To support offline builds, we use Go 'vendoring': module dependencies are
+# downloaded during the fetch-phase and unpacked into the modules 'vendor'
+# folder. Additinally a manifest file is generated for the 'vendor' folder
+#
+
+inherit go-mod
+
+def go_src_uri(repo, path=None, subdir=None, vcs='git', destsuffix_prefix =
'git/src/import/vendor.fetch'):
+ module_path = repo if not path else path
+ src_uri = "{}://{};name={};destsuffix={}/{}".format(vcs, repo, \
+ module_path.replace('/', '.'), \
+ destsuffix_prefix, module_path)
+
+ src_uri += ";subdir={}".format(subdir) if subdir else ""
+ src_uri += ";nobranch=1;protocol=https" if vcs == "git" else ""
+
+ return src_uri
+
+def go_generate_vendor_manifest(d):
+
+ vendor_dir = os.path.join(os.path.basename(d.getVar('S')),
+ 'src', d.getVar('GO_IMPORT'), "vendor")
+ dst = os.path.join(vendor_dir, "modules.txt")
+
+ go_modules = d.getVarFlags("GO_MODULE_PATH")
+ with open(dst, "w") as manifest:
+ for go_module in go_modules:
+ module_path = d.getVarFlag("GO_MODULE_PATH", go_module)
+ module_version = d.getVarFlag("GO_MODULE_VERSION", go_module)
+ if module_path and module_version:
+ manifest.write("# %s %s\n" % (module_path, module_version))
+ manifest.write("## explicit\n")
+ exclude = set(['vendor'])
+ for subdir, dirs, files in os.walk(os.path.join(vendor_dir,
module_path), topdown=True):
+ dirs[:] = [d for d in dirs if d not in exclude]
+ for file in files:
+ if file.endswith(".go"):
+ manifest.write(subdir[len(vendor_dir)+1:] + "\n")
+ break
+
+python go_do_unpack:append() {
+ src_uri = (d.getVar('SRC_URI') or "").split()
+ if len(src_uri) == 0:
+ return
+
+ try:
+ fetcher = bb.fetch2.Fetch(src_uri, d)
+ src_folder = os.path.join(os.path.basename(d.getVar('S')),
+ 'src', d.getVar('GO_IMPORT'))
+ vendor_src = os.path.join(src_folder, "vendor")
+ vendor_dst = os.path.join(d.getVar('S'), "src", "import",
"vendor.fetch")
+
+ os.symlink(os.path.relpath(vendor_dst, src_folder), vendor_src)
+ go_generate_vendor_manifest(d)
+
+ except bb.fetch2.BBFetchException as e:
+ raise bb.build.FuncFailed(e)
+}
--
2.30.2
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