Adding m4 macros for Git versioning.

1 files changed, 67 insertions, 0 deletions

diff --git a/m4/dmstools_git.m4 b/m4/dmstools_git.m4
new file mode 100644
index 0000000..a48a0a3
--- /dev/null
+++ b/m4/dmstools_git.m4
@@ -0,0 +1,67 @@
+#
+#   DMS Tools and Utilities
+#   Copyright (C) 2008 David M. Syzdek <david@syzdek.net>
+#
+#   @SYZDEK_LICENSE_HEADER_START@
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License Version 2 as
+#   published by the Free Software Foundation.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program; if not, write to the Free Software
+#   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+#
+#   @SYZDEK_LICENSE_HEADER_END@
+#
+#   acinclude.m4 - custom m4 macros used by configure.ac
+#
+
+# AC_DMS_GIT_PACKAGE_VERSION()
+# -----------------------------------
+AC_DEFUN([AC_DMS_GIT_PACKAGE_VERSION],[dnl
+
+   if test -f ${srcdir}/.git/config;then
+      GPV=$(git describe --abbrev=7 HEAD 2>/dev/null)
+      GPV=$(echo "$GPV" | sed -e 's/-/./g')
+      GPV=$(echo "$GPV" | sed -e 's/^v//g')
+      if test "x${GPV}" != "x";then
+         AC_MSG_NOTICE([using git package version ${GPV}])
+         if test -d ${ac_aux_dir};then 
+            echo ${GPV} > ${ac_aux_dir}/git-package-version
+         fi
+      fi
+   elif test -f ${ac_aux_dir}/git-package-version;then
+      GPV=$(cat ${ac_aux_dir}/git-package-version)
+      if test -d ${ac_aux_dir};then
+         AC_MSG_NOTICE([using cached git package version ${GPV}])
+      fi
+   fi
+
+   if test "x${GPV}" = "x";then
+      AC_MSG_WARN([unable to determine package version from Git tags])
+   else
+      #
+      # set internal variables
+      GIT_PACKAGE_VERSION=${GPV}
+      PACKAGE_VERSION=${GPV}
+      VERSION=${GPV}
+      #
+      # set substitution variables
+      AC_SUBST([GIT_PACKAGE_VERSION], [${GPV}])
+      AC_SUBST([PACKAGE_VERSION], [${GPV}])
+      AC_SUBST([VERSION], [${GPV}])
+      #
+      # set C/C++/Objc preprocessor macros
+      AC_DEFINE_UNQUOTED([GIT_PACKAGE_VERSION], ["${GIT_PACKAGE_VERSION}"], [package version determined from git repository])
+      AC_DEFINE_UNQUOTED([PACKAGE_VERSION], ["${GIT_PACKAGE_VERSION}"], [package version determined from git repository])
+      AC_DEFINE_UNQUOTED([VERSION], ["${GIT_PACKAGE_VERSION}"], [package version determined from git repository])
+   fi
+])dnl
+
+# end of M4 file