X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2FSConscript;h=37b3f8572e25a28dee7fbb6c64eef9131998327b;hb=076faf8764d3cd8038145286f7533d0a18e82476;hp=4ba0a32d66925440b72e718547a4fe25334c7a27;hpb=741744f691d6ef63e9f9a4c03136f969f2ffb0bf;p=mesa.git

diff --git a/src/SConscript b/src/SConscript
index 4ba0a32d669..37b3f8572e2 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 +15,38 @@ if env['hostonly']:
     # 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."""
+
+    tempfile = "git_sha1.h.tmp"
+    with open(tempfile, "w") as f:
+        args = [ 'sh', Dir('#').abspath + '/bin/git_sha1_gen.sh' ]
+        try:
+            subprocess.Popen(args, stdout=f).wait()
+        except:
+            print "Warning: exception in write_git_sha1_h_file()"
+            return
+
+    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')