1 files changed, 85 insertions, 0 deletions
diff --git a/poky/meta/classes/image-buildinfo.bbclass b/poky/meta/classes/image-buildinfo.bbclass
new file mode 100644
index 000000000..213fb9cf9
--- /dev/null
+++ b/poky/meta/classes/image-buildinfo.bbclass
@@ -0,0 +1,85 @@
+#
+# 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;"