scons: put the generated git_sha1.h file in top-level src/ directory
To match what's done in the automake build.
v2: Use git rev-parse to get a 10-character hash ID
Fix Python imports
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: José Fonseca <jfonseca@vmware.com>
diff --git a/src/SConscript b/src/SConscript
index 4ba0a32..d861af8 100644
--- a/src/SConscript
+++ b/src/SConscript
@@ -1,5 +1,8 @@
-Import('*')
+import filecmp
+import os
+import subprocess
+Import('*')
if env['platform'] == 'windows':
SConscript('getopt/SConscript')
@@ -12,6 +15,50 @@
# compilation
Return()
+
+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', 'rev-parse', '--short=10', 'HEAD' ]
+ try:
+ (commit, foo) = subprocess.Popen(args, stdout=subprocess.PIPE).communicate()
+ except:
+ print "Warning: exception in write_git_sha1_h_file()"
+ # git log command didn't work
+ if not os.path.exists(filename):
+ dirname = os.path.dirname(filename)
+ if dirname and not os.path.exists(dirname):
+ os.makedirs(dirname)
+ # create an empty file if none already exists
+ f = open(filename, "w")
+ f.close()
+ return
+
+ # note that commit[:-1] removes the trailing newline character
+ commit = '#define MESA_GIT_SHA1 "git-%s"\n' % commit[:-1]
+ 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("git_sha1.h")
+# and update CPPPATH so the git_sha1.h header can be found
+env.Append(CPPPATH = ["#" + env['build_dir']])
+
+
+
if env['platform'] != 'windows':
SConscript('loader/SConscript')