[gcab] build-sys: add -dirty to modified git version

[Marc-André Lureau <malureau src gnome org>]

commit c8c024d2018c3c791f7da6ff3965f3d01c5f3539
Author: Marc-André Lureau <marcandre lureau redhat com>
Date:   Tue Feb 13 11:49:13 2018 +0100

    build-sys: add -dirty to modified git version
    
    Track repository dirty state in version string.
    
    Signed-off-by: Marc-André Lureau <marcandre lureau redhat com>

 meson.build |   18 +++++++++++-------
 1 files changed, 11 insertions(+), 7 deletions(-)
---
diff --git a/meson.build b/meson.build
index 861df60..d2f95dd 100644
--- a/meson.build
+++ b/meson.build
@@ -8,7 +8,7 @@ project('gcab', 'c',
 git_version = []
 git = find_program('git', required: false)
 if git.found()
-  git_version = run_command(git, 'describe', '--abbrev=4', 'HEAD').stdout().strip().split('-')
+  git_version = run_command(git, 'describe', '--abbrev=4', '--dirty').stdout().strip().split('-')
 endif
 
 # libtool versioning
@@ -96,15 +96,19 @@ libz = dependency('zlib')
 gnome = import('gnome')
 i18n = import('i18n')
 
-conf = configuration_data()
-conf.set_quoted('GETTEXT_PACKAGE', meson.project_name())
-conf.set_quoted('PACKAGE_NAME', meson.project_name())
-if git_version.length() == 3
-  conf.set_quoted('PACKAGE_STRING', '@0@ @1@.@2@-@3@'.format(meson.project_name(), git_version[0], 
git_version[1], git_version[2]))
+if git_version.length() >= 3
+  package_string = '@0@ @1@.@2@-@3@'.format(meson.project_name(), git_version[0], git_version[1], 
git_version[2])
+  if git_version.length() == 4
+    package_string = '@0@-dirty'.format(package_string)
+  endif
 else
-  conf.set_quoted('PACKAGE_STRING', '@0@ v@1@'.format(meson.project_name(), meson.project_version()))
+  package_string = '@0@ v@1@'.format(meson.project_name(), meson.project_version())
 endif
 
+conf = configuration_data()
+conf.set_quoted('GETTEXT_PACKAGE', meson.project_name())
+conf.set_quoted('PACKAGE_NAME', meson.project_name())
+conf.set_quoted('PACKAGE_STRING', package_string)
 conf.set_quoted('LOCALEDIR', join_paths(get_option('prefix'), get_option('localedir')))
 conf.set_quoted('PACKAGE_BUGREPORT', 
'https://bugzilla.gnome.org/enter_bug.cgi?product=msitools&component=gcab')
 conf.set_quoted('TESTDATADIR', join_paths(meson.source_root(), 'tests'))