From: Eric Engestrom <eric@engestrom.ch>
Date: Tue, 24 Oct 2017 17:03:39 +0000 (+0100)
Subject: meson: bring MESA_GIT_SHA1 in line with other build systems
X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=commitdiff_plain;h=05a94a4dfc79f95d597dd6fc08eea4a947eb300c

meson: bring MESA_GIT_SHA1 in line with other build systems

Meson's vcs_tag() uses the output of `git describe`, eg.
  17.3-branchpoint-5-gfbf29c3cd15ae831e249+

Whereas the other build systems used a script that outputs only the sha1
of the HEAD commit, eg.
  fbf29c3cd1

Given that this information is used by printing it next to the version
number, there's some redundancy here, and inconsistency between build
systems.

Bring Meson in line by making it use the same script, with the added
advantage of now supporting the MESA_GIT_SHA1_OVERRIDE env var.

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
---

diff --git a/bin/meson.build b/bin/meson.build
new file mode 100644
index 00000000000..b8b44baf7d0
--- /dev/null
+++ b/bin/meson.build
@@ -0,0 +1,21 @@
+# Copyright © 2017 Eric Engestrom
+
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+git_sha1_gen_py = files('git_sha1_gen.py')
diff --git a/meson.build b/meson.build
index 49a0ef6d405..875f9d4d294 100644
--- a/meson.build
+++ b/meson.build
@@ -843,4 +843,5 @@ endif
 pkg = import('pkgconfig')
 
 subdir('include')
+subdir('bin')
 subdir('src')
diff --git a/src/meson.build b/src/meson.build
index 9b1b0ae594d..f980d25b7dd 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -34,9 +34,11 @@ libglsl_util = static_library(
   build_by_default : false,
 )
 
-sha1_h = vcs_tag(
-  input : 'git_sha1.h.in',
+sha1_h = custom_target(
+  'git_sha1.h',
   output : 'git_sha1.h',
+  command : [prog_python2, git_sha1_gen_py, '--output', '@OUTPUT@'],
+  build_always : true, # commit sha1 can change without having touched these files
 )
 
 subdir('gtest')