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+#
+# Writes build information to target filesystem on /etc/build
+#
+# Copyright (C) 2014 Intel Corporation
+# Author: Alejandro Enedino Hernandez Samaniego <alejandro.hernandez@intel.com>
+#
+# Licensed under the MIT license, see COPYING.MIT for details
+#
+# Usage: add INHERIT += "image-buildinfo" to your conf file
+#
+
+# Desired variables to display
+IMAGE_BUILDINFO_VARS ?= "DISTRO DISTRO_VERSION"
+
+# Desired location of the output file in the image.
+IMAGE_BUILDINFO_FILE ??= "${sysconfdir}/build"
+
+# From buildhistory.bbclass
+def image_buildinfo_outputvars(vars, listvars, d):
+ vars = vars.split()
+ listvars = listvars.split()
+ ret = ""
+ for var in vars:
+ value = d.getVar(var) or ""
+ if (d.getVarFlag(var, 'type') == "list"):
+ value = oe.utils.squashspaces(value)
+ ret += "%s = %s\n" % (var, value)
+ return ret.rstrip('\n')
+
+# Gets git branch's status (clean or dirty)
+def get_layer_git_status(path):
+ import subprocess
+ try:
+ subprocess.check_output("""cd %s; export PSEUDO_UNLOAD=1; set -e;
+ git diff --quiet --no-ext-diff
+ git diff --quiet --no-ext-diff --cached""" % path,
+ shell=True,
+ stderr=subprocess.STDOUT)
+ return ""
+ except subprocess.CalledProcessError as ex:
+ # Silently treat errors as "modified", without checking for the
+ # (expected) return code 1 in a modified git repo. For example, we get
+ # output and a 129 return code when a layer isn't a git repo at all.
+ return "-- modified"
+
+# Returns layer revisions along with their respective status
+def get_layer_revs(d):
+ layers = (d.getVar("BBLAYERS") or "").split()
+ medadata_revs = ["%-17s = %s:%s %s" % (os.path.basename(i), \
+ base_get_metadata_git_branch(i, None).strip(), \
+ base_get_metadata_git_revision(i, None), \
+ get_layer_git_status(i)) \
+ for i in layers]
+ return '\n'.join(medadata_revs)
+
+def buildinfo_target(d):
+ # Get context
+ if d.getVar('BB_WORKERCONTEXT') != '1':
+ return ""
+ # Single and list variables to be read
+ vars = (d.getVar("IMAGE_BUILDINFO_VARS") or "")
+ listvars = (d.getVar("IMAGE_BUILDINFO_LVARS") or "")
+ return image_buildinfo_outputvars(vars, listvars, d)
+
+# Write build information to target filesystem
+python buildinfo () {
+ with open(d.expand('${IMAGE_ROOTFS}${IMAGE_BUILDINFO_FILE}'), 'w') as build:
+ build.writelines((
+ '''-----------------------
+Build Configuration: |
+-----------------------
+''',
+ buildinfo_target(d),
+ '''
+-----------------------
+Layer Revisions: |
+-----------------------
+''',
+ get_layer_revs(d),
+ '''
+'''
+ ))
+}
+
+IMAGE_PREPROCESS_COMMAND += "buildinfo;"