From 739bafbd8ecdbbf2eb3fd42e1b3d9249236a3fcf Mon Sep 17 00:00:00 2001
From: Tony Crisci <tony@dubstepdish.com>
Date: Thu, 30 Nov 2017 04:48:08 -0500
Subject: [PATCH] make meson version configurable

---
 meson.build       | 16 +++++++++++++---
 meson_options.txt |  1 +
 2 files changed, 14 insertions(+), 3 deletions(-)
 create mode 100644 meson_options.txt

diff --git a/meson.build b/meson.build
index af383fbf..ac161987 100644
--- a/meson.build
+++ b/meson.build
@@ -23,10 +23,20 @@ pango          = dependency('pango')
 pixman         = dependency('pixman-1')
 libcap         = dependency('libcap')
 math           = cc.find_library('m')
+git = find_program('git', required: false)
 
-git_commit_hash = run_command(['git', 'describe', '--always', '--tags']).stdout().strip()
-git_branch = run_command(['git', 'rev-parse', '--abbrev-ref', 'HEAD']).stdout().strip()
-version = '"@0@ (" __DATE__ ", branch \'@1@\')"'.format(git_commit_hash, git_branch)
+version = get_option('sway_version')
+if version != ''
+	version = '"@0@"'.format(version)
+else
+	if not git.found()
+		error('git is required to make the version string')
+	endif
+
+	git_commit_hash = run_command([git.path(), 'describe', '--always', '--tags']).stdout().strip()
+	git_branch = run_command([git.path(), 'rev-parse', '--abbrev-ref', 'HEAD']).stdout().strip()
+	version = '"@0@ (" __DATE__ ", branch \'@1@\')"'.format(git_commit_hash, git_branch)
+endif
 
 add_project_arguments('-DSWAY_VERSION=@0@'.format(version), language: 'c')
 
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 00000000..5015a986
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1 @@
+option('sway_version', type : 'string', description : 'The version string reported in `sway --version`.')