tools/version.sh: Update embedded version numbers in build products

We can now use `tools/version.sh --release` to update the MANIFEST.MF
and Maven POM files with the current version number of this project,
so they appear in any build product created.

The counterpart --snapshot option be used to reset files to use
their natural *-SNAPSHOT and *.qualifier state during development.

We use a simple Bourne shell script with Perl calls because we
must edit both Maven pom.xml and OSGi bundle MANIFEST.MF in order
to store the correct data for our parallel build systems.  In the
future we should use a native Java solution which relies upon JGit
to compute the `git describe` portion.

Until we tag our first official release a "tagged snapshot" can be
made by creating an artifical annotated tag first:

  git tag -a -m "initial contribution" v0.5.1 046198cf5f21e5a63e8ec0ecde2ef3fe21db2eae
  tools/version.sh --release

Resulting in a version string like "0.5.1.50-ge16af83".

Change-Id: Ic2bbae75bf96fc8831324c62c2212131277f70e4
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

1 files changed, 107 insertions, 0 deletions

diff --git a/tools/version.sh b/tools/version.sh
new file mode 100644
index 0000000000..eee41f00a1
--- /dev/null
+++ b/tools/version.sh
@@ -0,0 +1,107 @@
+#!/bin/sh
+# Copyright (C) 2009, Google Inc.
+# and other copyright owners as documented in the project's IP log.
+#
+# This program and the accompanying materials are made available
+# under the terms of the Eclipse Distribution License v1.0 which
+# accompanies this distribution, is reproduced below, and is
+# available at http://www.eclipse.org/org/documents/edl-v10.php
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or
+# without modification, are permitted provided that the following
+# conditions are met:
+#
+# - Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+#
+# - Redistributions in binary form must reproduce the above
+#   copyright notice, this list of conditions and the following
+#   disclaimer in the documentation and/or other materials provided
+#   with the distribution.
+#
+# - Neither the name of the Eclipse Foundation, Inc. nor the
+#   names of its contributors may be used to endorse or promote
+#   products derived from this software without specific prior
+#   written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+# Update all pom.xml and MANIFEST.MF with new build number
+#
+# TODO(spearce) This should be converted to some sort of
+# Java based Maven plugin so its fully portable.
+#
+
+case "$1" in
+--snapshot=*)
+	V=$(echo "$1" | perl -pe 's/^--snapshot=//')
+	if [ -z "$V" ]
+	then
+		echo >&2 "usage: $0 --snapshot=0.n.0"
+		exit 1
+	fi
+	case "$V" in
+	*-SNAPSHOT) : ;;
+	*) V=$V-SNAPSHOT ;;
+	esac
+	;;
+
+--release)
+	V=$(git describe HEAD) || exit
+	;;
+
+*)
+	echo >&2 "usage: $0 {--snapshot=0.n.0 | --release}"
+	exit 1
+esac
+
+case "$V" in
+v*) V=$(echo "$V" | perl -pe s/^v//) ;;
+esac
+
+case "$V" in
+*-SNAPSHOT)
+	POM_V=$V
+	MF_V=$(echo "$V" | perl -pe 's/-SNAPSHOT$/.qualifier/')
+	;;
+*-[1-9]*-g[0-9a-f]*)
+	POM_V=$(echo "$V" | perl -pe 's/-(\d+-g.*)$/.$1/')
+	MF_V=$POM_V
+	;;
+*)
+	POM_V=$V
+	MF_V=$V
+	;;
+esac
+
+perl -pi -e '
+	s/^(Bundle-Version:).*/$1 '"$MF_V"'/
+	' $(git ls-files | grep META-INF/MANIFEST.MF)
+
+perl -pi -e '
+	if ($ARGV ne $old_argv) {
+		$seen_version = 0;
+		$old_argv = $ARGV;
+	}
+	if (!$seen_version) {
+		$seen_version = 1 if
+		s{(<version>).*(</version>)}{${1}'"$POM_V"'${2}};
+	}
+	' $(git ls-files | grep pom.xml)
+
+git diff