genversion.bat: generate same version as update_version

Remove version.mk and references to it in the repo.

genversion.bat will now generate the same version strings as
update_version script, i.e. without 'v' prefix and without a
fallback if git archive is used.

If run from a release tarball it'll use package_version,
like configure. If run from a git repo, it will use the same
'git describe' with '-dirty' as update_version.

Signed-off-by: Ralph Giles <giles@thaumas.net>

Makefile.am

@@ -157,8 +157,7 @@ opus_custom_demo_LDADD = libopus.la $(LIBM)
 endif
 endif
 
-EXTRA_DIST = version.mk \
-             opus.pc.in \
+EXTRA_DIST = opus.pc.in \
              opus-uninstalled.pc.in \
              opus.m4 \
              Makefile.mips \

doc/release.txt

@@ -4,7 +4,6 @@
 
 - Check for uncommitted changes to master.
 - Update OPUS_LT_* API versioning in configure.ac.
-- Update the version in version.mk
 - Tag the release commit with 'git tag -s vN.M'.
  - Include release notes in the tag annotation.
 - Verify 'make distcheck' produces a tarball with

version.mk

-# static version string; update manually every release.
-PACKAGE_VERSION = "1.2-alpha"

win32/genversion.bat

@@ -2,13 +2,13 @@
 
 setlocal enableextensions enabledelayedexpansion
 
-for /f %%v in ('git --git-dir="%~dp0..\.git" describe --tags --match "v*"') do set version=%%v
+for /f %%v in ('cd "%~dp0.." ^&^& git status ^>NUL 2^>NUL ^&^& git describe --tags --match "v*" --dirty 2^>NUL') do set version=%%v
 
-if not "%version%"=="" goto :gotversion
+if not "%version%"=="" set version=!version:~1! && goto :gotversion
 
-if exist "%~dp0..\version.mk" goto :getversion
+if exist "%~dp0..\package_version" goto :getversion
 
-echo Git cannot be found, nor can version.mk. Generating unknown version.
+echo Git cannot be found, nor can package_version. Generating unknown version.
 
 set version=unknown
 
@@ -16,25 +16,16 @@ goto :gotversion
 
 :getversion
 
-for /f "delims== tokens=2" %%v in (%~dps0..\version.mk) do set version=%%v
-
-set version=!version:^"=!
-set version=!version: =!
+for /f "delims== tokens=2" %%v in (%~dps0..\package_version) do set version=%%v
+set version=!version:"=!
 
 :gotversion
 
+set version=!version: =!
 set version_out=#define %~2 "%version%"
-set version_mk=%~2 = "%version%"
 
 echo %version_out%> "%~1_temp"
 
-if %version%==unknown goto :skipgenerate
-
-echo # static version string; update manually every release.> "%~dp0..\version.mk"
-echo %version_mk%>> "%~dp0..\version.mk"
-
-:skipgenerate
-
 echo n | comp "%~1_temp" "%~1" > NUL 2> NUL
 
 if not errorlevel 1 goto exit