build: set version based on git tag or specific

This patch brings version and release number generated at build time
using git tags or fixed content from VERSION file.

With git tag, version/release number are got from output of
'git describe --tags --match "v[0-9]*"' command.

This behavior can be overriden by having VERSION file with fixed
version/release.  The VERSION file should have text describing version
and release for example something like 'v3.4.0-1'

For testing this patch, its required to remove autom4te.cache
directory to avoid seeing previously set version.

BUG: 1074919
Change-Id: I8f68172e8b389b0ba0846e9adb4b597e67a909aa
Signed-off-by: Bala.FA <barumuga@redhat.com>
Reviewed-on: http://review.gluster.org/7164
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/build-aux/pkg-version b/build-aux/pkg-version
new file mode 100755
index 00000000000..2be2a975621
--- /dev/null
+++ b/build-aux/pkg-version
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# To override version/release from git,
+# create VERSION file containing text with version/release
+# eg. v3.4.0-1
+PKG_VERSION=`cat VERSION 2> /dev/null || git describe --tags --match "v[0-9]*"`
+
+function get_version ()
+{
+    # tags and output versions:
+    #   - v3.4.0   => 3.4.0 (upstream clean)
+    #   - v3.4.0-1 => 3.4.0 (downstream clean)
+    #   - v3.4.0-2-g34e62f   => 3.4.0 (upstream dirty)
+    #   - v3.4.0-1-2-g34e62f => 3.4.0 (downstream dirty)
+    AWK_VERSION='
+    BEGIN { FS="-" }
+    /^v[0-9]/ {
+      sub(/^v/,"") ; print $1
+    }'
+
+    echo $PKG_VERSION | awk "$AWK_VERSION" | tr -cd '[:alnum:].'
+}
+
+function get_release ()
+{
+    # tags and output releases:
+    #   - v3.4.0   => 0 (upstream clean)
+    #   - v3.4.0-1 => 1 (downstream clean)
+    #   - v3.4.0-2-g34e62f1   => 2.git34e62f1 (upstream dirty)
+    #   - v3.4.0-1-2-g34e62f1 => 1.2.git34e62f1 (downstream dirty)
+    AWK_RELEASE='
+    BEGIN { FS="-"; OFS="." }
+    /^v[0-9]/ {
+      if (NF == 1) print 0
+      else if (NF == 2) print $2
+      else if (NF == 3) print $2, "git" substr($3, 2)
+      else if (NF == 4) print $2, $3, "git" substr($4, 2)
+    }'
+
+    echo $PKG_VERSION | awk "$AWK_RELEASE" | tr -cd '[:alnum:].'
+}
+
+if test "x$1" = "x--full"; then
+    echo -n "v$(get_version)-$(get_release)"
+elif test "x$1" = "x--version"; then
+    get_version
+elif test "x$1" = "x--release"; then
+    get_release
+else
+    echo "usage: $0 [--full|--version|--release]"
+    exit 1
+fi