Initial import of a python script to import changesets from Perforce into git.

Signed-off-by: Simon Hausmann <shausman@trolltech.com>

contrib/fast-import/p4-fast-export.py

@@ -0,0 +1,150 @@
+#!/usr/bin/python
+#
+# p4-fast-export.py
+#
+# Author: Simon Hausmann <hausmann@kde.org>
+# License: MIT <http://www.opensource.org/licenses/mit-license.php>
+#
+# TODO: - fix date parsing (how hard can it be?)
+#       - support integrations (at least p4i)
+#       - support incremental imports
+#       - create tags
+#       - instead of reading all files into a variable try to pipe from
+#       - p4 print directly to stdout. need to figure out file size somehow
+#         though.
+#       - support p4 submit (hah!)
+#       - don't hardcode the import to master
+#
+import os, string, sys
+
+# yep, that's hardcoded right. will fix to a commandline option rsn :)
+prefix = "//depot/qt/main/"
+# that's in revision range syntax, for example @2342,523634
+changeRange = ""
+
+def describe(change):
+    output = os.popen("p4 describe %s" % change).readlines()
+
+    firstLine = output[0]
+
+    author = firstLine.split(" ")[3]
+    author = author[:author.find("@")]
+
+    filesSection = 0
+    try:
+        filesSection = output.index("Affected files ...\n")
+    except ValueError:
+        sys.stderr.write("Change %s doesn't seem to affect any files. Weird.\n" % change)
+        return [], [], [], []
+
+    differencesSection = 0
+    try:
+        differencesSection = output.index("Differences ...\n")
+    except ValueError:
+        sys.stderr.write("Change %s doesn't seem to have a differences section. Weird.\n" % change)
+        return [], [], [], []
+
+    log = output[2:filesSection - 1]
+
+    lines = output[filesSection + 2:differencesSection - 1]
+
+    changed = []
+    removed = []
+
+    for line in lines:
+        # chop off "... " and trailing newline
+        line = line[4:len(line) - 1]
+
+        lastSpace = line.rfind(" ")
+        if lastSpace == -1:
+            sys.stderr.write("trouble parsing line %s, skipping!\n" % line)
+            continue
+
+        operation = line[lastSpace + 1:]
+        path = line[:lastSpace]
+
+        if operation == "delete":
+            removed.append(path)
+        else:
+            changed.append(path)
+
+    return author, log, changed, removed
+
+def p4cat(path):
+    return os.popen("p4 print -q \"%s\"" % path).read()
+
+def stripRevision(path):
+    hashPos = path.rindex("#")
+    return path[:hashPos]
+
+def getUserMap():
+    users = {}
+    output = os.popen("p4 users")
+    for line in output:
+        firstSpace = line.index(" ")
+        secondSpace = line.index(" ", firstSpace + 1)
+        key = line[:firstSpace]
+        email = line[firstSpace + 1:secondSpace]
+        openParenPos = line.index("(", secondSpace)
+        closedParenPos = line.index(")", openParenPos)
+        name = line[openParenPos + 1:closedParenPos]
+
+        users[key] = name + " " + email
+
+    return users
+
+
+users = getUserMap()
+
+output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
+
+changes = []
+for line in output:
+    changeNum = line.split(" ")[1]
+    changes.append(changeNum)
+
+changes.reverse()
+
+sys.stderr.write("\n")
+
+cnt = 0
+for change in changes:
+    [ author, log, changedFiles, removedFiles ] = describe(change)
+    sys.stderr.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
+    cnt = cnt + 1
+#    sys.stderr.write("%s\n" % log)
+#    sys.stderr.write("%s\n" % changedFiles)
+#    sys.stderr.write("%s\n" % removedFiles)
+
+    print "commit refs/heads/master"
+    if author in users:
+        print "committer %s 1 2" % users[author]
+    else:
+        print "committer %s <a@b> 1 2" % author
+    print "data <<EOT"
+    for l in log:
+        print l[:len(l) - 1]
+    print "EOT"
+
+    print ""
+
+    for f in changedFiles:
+        if not f.startswith(prefix):
+            sys.stderr.write("\nchanged files: ignoring path %s outside of %s in change %s\n" % (f, prefix, change))
+            continue
+        relpath = f[len(prefix):]
+        print "M 644 inline %s" % stripRevision(relpath)
+        data = p4cat(f)
+        print "data %s" % len(data)
+        sys.stdout.write(data)
+        print ""
+
+    for f in removedFiles:
+        if not f.startswith(prefix):
+            sys.stderr.write("\ndeleted files: ignoring path %s outside of %s in change %s\n" % (f, prefix, change))
+            continue
+        relpath = f[len(prefix):]
+        print "D %s" % stripRevision(relpath)
+
+    print ""
+