build-sys: added githooks to do Change-Id insertion/filtering.

diff --git a/githooks/commit-msg b/githooks/commit-msg
new file mode 100755 (executable)
index 0000000..8836d79
--- /dev/null
+++ b/githooks/commit-msg
@@ -0,0 +1,206 @@
+#!/bin/sh
+# From Gerrit Code Review 2.6.1.20130902
+#
+# Part of Gerrit Code Review (http://code.google.com/p/gerrit/)
+#
+# Copyright (C) 2009 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+unset GREP_OPTIONS
+
+CHANGE_ID_AFTER="Bug|Issue"
+MSG="$1"
+
+# Check for, and add if missing, a unique Change-Id
+#
+add_ChangeId() {
+       clean_message=`sed -e '
+               /^diff --git a\/.*/{
+                       s///
+                       q
+               }
+               /^Signed-off-by:/d
+               /^#/d
+       ' "$MSG" | git stripspace`
+       if test -z "$clean_message"
+       then
+               return
+       fi
+
+       # Does Change-Id: already exist? if so, exit (no change).
+       if grep -i '^Change-Id:' "$MSG" >/dev/null
+       then
+               return
+       fi
+
+       id=`_gen_ChangeId`
+       T="$MSG.tmp.$$"
+       AWK=awk
+       if [ -x /usr/xpg4/bin/awk ]; then
+               # Solaris AWK is just too broken
+               AWK=/usr/xpg4/bin/awk
+       fi
+
+       # How this works:
+       # - parse the commit message as (textLine+ blankLine*)*
+       # - assume textLine+ to be a footer until proven otherwise
+       # - exception: the first block is not footer (as it is the title)
+       # - read textLine+ into a variable
+       # - then count blankLines
+       # - once the next textLine appears, print textLine+ blankLine* as these
+       #   aren't footer
+       # - in END, the last textLine+ block is available for footer parsing
+       $AWK '
+       BEGIN {
+               # while we start with the assumption that textLine+
+               # is a footer, the first block is not.
+               isFooter = 0
+               footerComment = 0
+               blankLines = 0
+       }
+
+       # Skip lines starting with "#" without any spaces before it.
+       /^#/ { next }
+
+       # Skip the line starting with the diff command and everything after it,
+       # up to the end of the file, assuming it is only patch data.
+       # If more than one line before the diff was empty, strip all but one.
+       /^diff --git a/ {
+               blankLines = 0
+               while (getline) { }
+               next
+       }
+
+       # Count blank lines outside footer comments
+       /^$/ && (footerComment == 0) {
+               blankLines++
+               next
+       }
+
+       # Catch footer comment
+       /^\[[a-zA-Z0-9-]+:/ && (isFooter == 1) {
+               footerComment = 1
+       }
+
+       /]$/ && (footerComment == 1) {
+               footerComment = 2
+       }
+
+       # We have a non-blank line after blank lines. Handle this.
+       (blankLines > 0) {
+               print lines
+               for (i = 0; i < blankLines; i++) {
+                       print ""
+               }
+
+               lines = ""
+               blankLines = 0
+               isFooter = 1
+               footerComment = 0
+       }
+
+       # Detect that the current block is not the footer
+       (footerComment == 0) && (!/^\[?[a-zA-Z0-9-]+:/ || /^[a-zA-Z0-9-]+:\/\//) {
+               isFooter = 0
+       }
+
+       {
+               # We need this information about the current last comment line
+               if (footerComment == 2) {
+                       footerComment = 0
+               }
+               if (lines != "") {
+                       lines = lines "\n";
+               }
+               lines = lines $0
+       }
+
+       # Footer handling:
+       # If the last block is considered a footer, splice in the Change-Id at the
+       # right place.
+       # Look for the right place to inject Change-Id by considering
+       # CHANGE_ID_AFTER. Keys listed in it (case insensitive) come first,
+       # then Change-Id, then everything else (eg. Signed-off-by:).
+       #
+       # Otherwise just print the last block, a new line and the Change-Id as a
+       # block of its own.
+       END {
+               unprinted = 1
+               if (isFooter == 0) {
+                       print lines "\n"
+                       lines = ""
+               }
+               changeIdAfter = "^(" tolower("'"$CHANGE_ID_AFTER"'") "):"
+               numlines = split(lines, footer, "\n")
+               for (line = 1; line <= numlines; line++) {
+                       if (unprinted && match(tolower(footer[line]), changeIdAfter) != 1) {
+                               unprinted = 0
+                               print "Change-Id: I'"$id"'"
+                       }
+                       print footer[line]
+               }
+               if (unprinted) {
+                       print "Change-Id: I'"$id"'"
+               }
+       }' "$MSG" > "$T" && mv "$T" "$MSG" || rm -f "$T"
+}
+_gen_ChangeIdInput() {
+       echo "tree `git write-tree`"
+       if parent=`git rev-parse "HEAD^0" 2>/dev/null`
+       then
+               echo "parent $parent"
+       fi
+       echo "author `git var GIT_AUTHOR_IDENT`"
+       echo "committer `git var GIT_COMMITTER_IDENT`"
+       echo
+       printf '%s' "$clean_message"
+}
+_gen_ChangeId() {
+       _gen_ChangeIdInput |
+       git hash-object -t commit --stdin
+}
+
+
+del_ChangeId() {
+    T="$MSG.tmp.$$"
+
+    cat "$MSG" | grep -v 'Change-Id: I' > "$T" && mv "$T" "$MSG" || rm -f "$T"
+}
+
+
+gittop=$(while [ ! -d .git -a $(pwd) != "/" ]; do cd ..; done; echo $(pwd))
+
+if [ -f $gittop/.rebase-branch-name ]; then
+    branch=$(cat $gittop/.rebase-branch-name)
+    echo "Taken branch name \"$branch\" from saved branch name file..."
+else
+    branch=$(git branch -l | grep '^\*' | cut -d ' ' -f 2)
+    echo "Using current branch name..."
+fi
+
+case $branch in
+    \(*|-)
+        echo "Can't figure out rebased branch name, not touching anything..."
+        ;;
+    *tizen*)
+        add_ChangeId
+        ;;
+    *)
+        del_ChangeId
+        ;;
+esac
+
+
+exit 0

diff --git a/githooks/post-rewrite b/githooks/post-rewrite
new file mode 100755 (executable)
index 0000000..a23bc51
--- /dev/null
+++ b/githooks/post-rewrite
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+gittop=$(while [ ! -d .git -a $(pwd) != "/" ]; do cd ..; done; echo $(pwd))
+
+if [ -f $gittop/.rebase-branch-name ]; then
+    rm -f $gittop/.rebase-branch-name
+    echo "Removed saved branch name file..."
+fi
+
+exit 0

diff --git a/githooks/pre-rebase b/githooks/pre-rebase
new file mode 100755 (executable)
index 0000000..1fe53bf
--- /dev/null
+++ b/githooks/pre-rebase
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+# This hook is called with the following parameters:
+#
+# $1 -- the upstream the series was forked from.
+# $2 -- the branch being rebased (or empty when rebasing the current branch).
+
+# Dig out and save the name of the branch being rebased for commit-msg hook.
+# There the branch name is used to add gerrit Change-Id footers to branches
+# matching .*tizen.* and remove from any other branches.
+
+branch=$(git branch -l | grep '^\*' | cut -d ' ' -f 2)
+gittop=$(while [ ! -d .git -a $(pwd) != "/" ]; do cd ..; done; echo $(pwd))
+
+case $branch in
+    \(*)
+        echo "-" > $gittop/.rebase-branch-name
+        ;;
+      *)
+        echo "$branch"   > $gittop/.rebase-branch-name
+        echo "Saved branch name \"$branch\" for commit-msg hook..."
+        ;;
+esac
+
+exit 0