Merge branch 'upstream' into dfsg-orig

[debian/gnuradio] / config / gr_git.m4

diff --git a/config/gr_git.m4 b/config/gr_git.m4
new file mode 100644 (file)
index 0000000..c4f1ea0
--- /dev/null
+++ b/config/gr_git.m4
@@ -0,0 +1,63 @@
+dnl Copyright 2009,2010 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
+
+
+AC_DEFUN([GR_GIT],[
+  dnl Identify git binary
+  AC_PATH_PROG([GIT],[git])
+  
+  dnl If it exists, get either 'git describe' or fallback to current commit
+  if test x$GIT != x ; then
+    AC_MSG_CHECKING([existence of git version control directory])
+    if test -d $srcdir/.git ; then
+      AC_MSG_RESULT([ok])
+      AC_MSG_CHECKING([git description of current commit])
+      if (cd $srcdir && $GIT describe >/dev/null 2>&1); then
+        GIT_DESCRIBE=`cd $srcdir && $GIT describe --abbrev=8 --long`
+        # Release candidate tags create an extra -rcX field
+       case $GIT_DESCRIBE in
+         *-*-*-*)
+           GIT_TAG=`echo $GIT_DESCRIBE | cut -f -2 -d '-'`
+           GIT_SEQNO=`echo $GIT_DESCRIBE | cut -f 3 -d '-'`
+           GIT_COMMIT=`echo $GIT_DESCRIBE | cut -f 4 -d '-' | cut -f 2- -d 'g'`
+           ;;
+         *-*-*)
+           GIT_TAG=`echo $GIT_DESCRIBE | cut -f 1 -d '-'`
+           GIT_SEQNO=`echo $GIT_DESCRIBE | cut -f 2 -d '-'`
+           GIT_COMMIT=`echo $GIT_DESCRIBE | cut -f 3 -d '-' | cut -f 2- -d 'g'`
+           ;;
+       esac
+
+       AC_MSG_RESULT([$GIT_DESCRIBE])
+      else
+        AC_MSG_RESULT([no tag in history, using current commit])
+       GIT_TAG=''
+       GIT_SEQNO=''
+       GIT_COMMIT=`cd $srcdir && $GIT describe --always --abbrev=8`
+      fi
+    else
+      AC_MSG_RESULT([not found])
+    fi
+
+    AC_SUBST([GIT_DESCRIBE])
+    AC_SUBST([GIT_TAG])
+    AC_SUBST([GIT_SEQNO])
+    AC_SUBST([GIT_COMMIT])
+  fi
+])