merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/contrib/fast-import/import-zips.py

@@ -0,0 +1,78 @@
+#!/usr/bin/env python
+
+## zip archive frontend for git-fast-import
+##
+## For example:
+##
+##  mkdir project; cd project; git init
+##  python import-zips.py *.zip
+##  git log --stat import-zips
+
+from os import popen, path
+from sys import argv, exit, hexversion, stderr
+from time import mktime
+from zipfile import ZipFile
+
+if hexversion < 0x01060000:
+    # The limiter is the zipfile module
+    stderr.write("import-zips.py: requires Python 1.6.0 or later.\n")
+    exit(1)
+
+if len(argv) < 2:
+    print 'usage:', argv[0], '<zipfile>...'
+    exit(1)
+
+branch_ref = 'refs/heads/import-zips'
+committer_name = 'Z Ip Creator'
+committer_email = 'zip@example.com'
+
+fast_import = popen('git fast-import --quiet', 'w')
+def printlines(list):
+    for str in list:
+        fast_import.write(str + "\n")
+
+for zipfile in argv[1:]:
+    commit_time = 0
+    next_mark = 1
+    common_prefix = None
+    mark = dict()
+
+    zip = ZipFile(zipfile, 'r')
+    for name in zip.namelist():
+        if name.endswith('/'):
+            continue
+        info = zip.getinfo(name)
+
+        if commit_time < info.date_time:
+            commit_time = info.date_time
+        if common_prefix == None:
+            common_prefix = name[:name.rfind('/') + 1]
+        else:
+            while not name.startswith(common_prefix):
+                last_slash = common_prefix[:-1].rfind('/') + 1
+                common_prefix = common_prefix[:last_slash]
+
+        mark[name] = ':' + str(next_mark)
+        next_mark += 1
+
+        printlines(('blob', 'mark ' + mark[name], \
+                    'data ' + str(info.file_size)))
+        fast_import.write(zip.read(name) + "\n")
+
+    committer = committer_name + ' <' + committer_email + '> %d +0000' % \
+        mktime(commit_time + (0, 0, 0))
+
+    printlines(('commit ' + branch_ref, 'committer ' + committer, \
+        'data <<EOM', 'Imported from ' + zipfile + '.', 'EOM', \
+        '', 'deleteall'))
+
+    for name in mark.keys():
+        fast_import.write('M 100644 ' + mark[name] + ' ' +
+            name[len(common_prefix):] + "\n")
+
+    printlines(('',  'tag ' + path.basename(zipfile), \
+        'from ' + branch_ref, 'tagger ' + committer, \
+        'data <<EOM', 'Package ' + zipfile, 'EOM', ''))
+
+if fast_import.close():
+    exit(1)