chiark - git - mdw - runlisp/blob - .ext/cfd/m4/mdw-auto-version.m4

1 dnl -*-autoconf-*-

2

3 ### SYNOPSIS

4 ###

5 ### mdw_AUTO_VERSION

6 ###

7 ### DESCRIPTION

8 ###

9 ### Defines an m4 macro `AUTO_VERSION' which contains the current package's

10 ### version number, worked out in some clever way.

11 ###

12 ### The heavy lifting is performed by the `auto-version' script (q.v.). In

13 ### brief:

14 ###

15 ### * if this is a Git working tree (i.e., there is a `.git' file or

16 ### directory at toplevel) then call `git describe' and use its output;

17 ###

18 ### * if there is a `RELEASE' file, then use its contents literally;

19 ###

20 ### * if there is a `debian/changelog' file, then use the most recent

21 ### entry's version number;

22 ###

23 ### * otherwise use `UNKNOWN'.

24 ###

25 ### LICENSE

26 ###

28 ###

29 ### This program is free software: you can redistribute it and/or modify it

30 ### under the terms of the GNU General Public License as published by the

31 ### Free Software Foundation, either version 2 of the License, or (at your

32 ### option) any later version.

33 ###

34 ### This program is distributed in the hope that it will be useful, but

35 ### WITHOUT ANY WARRANTY; without even the implied warranty of

36 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

37 ### General Public License for more details.

38 ###

39 ### You should have received a copy of the GNU General Public License along

40 ### with this program. If not, see <http://www.gnu.org/licenses/>.

41 ###

42 ### As a special exception, the respective Autoconf Macro's copyright owner

43 ### gives unlimited permission to copy, distribute and modify the configure

44 ### scripts that are the output of Autoconf when processing the Macro. You

45 ### need not follow the terms of the GNU General Public License when using

46 ### or distributing such scripts, even though portions of the text of the

47 ### Macro appear in them. The GNU General Public License (GPL) does govern

48 ### all other use of the material that constitutes the Autoconf Macro.

49 ###

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51 ### Macro released by the Autoconf Archive. When you make and distribute a

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53 ### exception to the GPL to apply to your modified version as well.

54

55 # serial 1

56 AC_DEFUN([mdw_AUTO_VERSION], [m4_define([AUTO_VERSION], m4_esyscmd([

57 ver=UNKNOWN

58 for pre in ./ config/; do

59 try=${pre}auto-version

60 if test -x $try; then ver=$("$try"); break; fi

61 done

62 echo -n "$ver"

63 ]))])