From c5e4187590f37e9524a8e3fcb2bccb20f2e8b4eb Mon Sep 17 00:00:00 2001
From: Lukas Fleischer <calcurse@cryptocrack.de>
Date: Mon, 18 Apr 2011 17:45:50 +0200
Subject: Add Git version string support.

Introduce a script to auto-generate version strings. Use `git describe`
to create descriptive version strings when building from a Git checkout,
use ".version" files for release tarballs.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
---
 .gitignore                |  1 +
 Makefile.am               |  4 ++++
 build-aux/git-version-gen | 24 ++++++++++++++++++++++++
 configure.ac              |  4 +++-
 4 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100755 build-aux/git-version-gen

diff --git a/.gitignore b/.gitignore
index dfeb327..318e79f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,7 @@ depcomp
 install-sh
 missing
 stamp-h1
+.version
 autom4te.cache/
 m4/
 
diff --git a/Makefile.am b/Makefile.am
index b37844b..3052b72 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,3 +7,7 @@ SUBDIRS = doc po src
 EXTRA_DIST = \
 	INSTALL \
 	ABOUT-NLS
+
+BUILT_SOURCES = $(top_srcdir)/.version
+$(top_srcdir)/.version:
+	echo $(VERSION) > $@-t && mv $@-t $@
diff --git a/build-aux/git-version-gen b/build-aux/git-version-gen
new file mode 100755
index 0000000..2cc88fc
--- /dev/null
+++ b/build-aux/git-version-gen
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+if [ "$#" -ne 1 ]
+then
+  echo "usage: git-version-gen <verfile>" >&2
+  exit 1
+fi
+
+VERFILE="$1"
+
+if [ -d '.git' ]
+then
+  VERSION=`git describe --abbrev=4 --match='v[0-9]*' --dirty | sed 's/^v//'`
+  echo -n "$VERSION" > "$VERFILE"
+fi
+
+if [ -f "$VERFILE" ]
+then
+  cat "$VERFILE"
+else
+  echo "git-version-gen: unknown version number." >&2
+  exit 1
+fi
+
diff --git a/configure.ac b/configure.ac
index 34121e4..f736d9f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,9 @@
 #                                                                           Init
 #-------------------------------------------------------------------------------
 AC_PREREQ(2.59)
-AC_INIT(calcurse, 2.8, bugs@calcurse.org)
+AC_INIT([calcurse],
+        m4_esyscmd([build-aux/git-version-gen .version]),
+        [bugs@calcurse.org])
 AM_INIT_AUTOMAKE
 #m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 AM_GNU_GETTEXT([external])
-- 
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