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-rw-r--r--mesalib/src/mesa/SConscript43
1 files changed, 37 insertions, 6 deletions
diff --git a/mesalib/src/mesa/SConscript b/mesalib/src/mesa/SConscript
index ff1ffe008..abcce4133 100644
--- a/mesalib/src/mesa/SConscript
+++ b/mesalib/src/mesa/SConscript
@@ -3,6 +3,9 @@
Import('*')
+import filecmp
+import os
+import subprocess
env = env.Clone()
@@ -458,13 +461,41 @@ if env['gcc'] and env['platform'] != 'windows':
env.Append(CPPPATH = [matypes[0].dir])
-# Create the git_sha1.h file if it doesn't exist already
-try:
- f = open('main/git_sha1.h', 'r')
- f.close()
-except IOError:
- f = open('main/git_sha1.h', 'w')
+
+
+def write_git_sha1_h_file(filename):
+ """Mesa looks for a git_sha1.h file at compile time in order to display
+ the current git hash id in the GL_VERSION string. This function tries
+ to retrieve the git hashid and write the header file. An empty file
+ will be created if anything goes wrong."""
+
+ args = [ 'git', 'log', '-n', '1', '--oneline' ]
+ try:
+ (commit, foo) = subprocess.Popen(args, stdout=subprocess.PIPE).communicate()
+ except:
+ # git log command didn't work
+ if not os.path.exists(filename):
+ # create an empty file if none already exists
+ f = open(filename, "w")
+ f.close()
+ return
+
+ commit = '#define MESA_GIT_SHA1 "git-%s"\n' % commit[0:7]
+ tempfile = "git_sha1.h.tmp"
+ f = open(tempfile, "w")
+ f.write(commit)
f.close()
+ if not os.path.exists(filename) or not filecmp.cmp(tempfile, filename):
+ # The filename does not exist or it's different from the new file,
+ # so replace old file with new.
+ if os.path.exists(filename):
+ os.remove(filename)
+ os.rename(tempfile, filename)
+ return
+
+
+# Create the git_sha1.h header file
+write_git_sha1_h_file("main/git_sha1.h")
# and update CPPPATH so the git_sha1.h header can be found
env.Append(CPPPATH = ["#" + env['build_dir'] + "/mesa/main"])