Added gsutil to depot tools

third_party/gsutil/pkg_util.py

Index: third_party/gsutil/pkg_util.py
diff --git a/third_party/gsutil/pkg_util.py b/third_party/gsutil/pkg_util.py
new file mode 100644
index 0000000000000000000000000000000000000000..8a0befc6b1642a53187f88393c347669120c284d
--- /dev/null
+++ b/third_party/gsutil/pkg_util.py
@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+
+# Utilities to facilitate maintaining one master list of package contents 
+# in MANIFEST.in and allow us to import that list into various packaging 
+# tools (e.g. rpmbuid and setup.py).
+
+# Define the file in which we maintain package contents. Rather than 
+# hard-coding our package contents, to ease maintenance we read the 
+# manifest file to obtain the list of files and directories to include.
+MANIFEST_IN = 'MANIFEST.in'
+
+# Define input and output files for customizing the rpm package spec.
+SPEC_IN = 'gsutil.spec.in'
+SPEC_OUT = 'gsutil.spec'
+
+# Root of rpmbuild tree for file enumeration in gsutil.spec file.
+RPM_ROOT = '%{_datadir}/%{name}/'
+
+def parse_manifest(files, dirs):
+  '''Parse contents of manifest file and append results to passed lists
+     of files and directories.
+  '''
+  f = open(MANIFEST_IN, 'r')
+  for line in f:
+    line = line.strip()
+    # Skip empty or comment lines.
+    if (len(line) <= 0) or (line[0] == '#'):
+      continue
+    tokens = line.split()
+    if len(tokens) >= 0:
+      if tokens[0] == 'include':
+        files.extend(tokens[1:])
+      elif tokens[0] == 'recursive-include' and tokens[2] == '*':
+        dirs.append(tokens[1])
+      else:
+        err = 'Unsupported type ' + tokens[0] + ' in ' + MANIFEST_IN + ' file.'
+        raise Exception(err)
+  f.close()
+
+# When executed as a separate script, create a dynamically generated rpm 
+# spec file. Otherwise, when loaded as a module by another script, no
+# specific actions are taken, other than making utility functions available
+# to the loading script.
+if __name__ == '__main__':
+  # Running as main so generate a new rpm spec file.
+  files = []
+  dirs = []
+  parse_manifest(files, dirs)
+  fin = open(SPEC_IN, 'r')
+  fout = open(SPEC_OUT, 'w')
+  for line in fin:
+    if line.strip() == '###FILES_GO_HERE###':
+      for file in files:
+        fout.write(RPM_ROOT + file + '\n')
+      for dir in dirs:
+        fout.write(RPM_ROOT + dir + '/\n')
+    else:
+      fout.write(line)
+  fout.close()
+  fin.close()