[PATCH v2] git-p4.py: add support for filetype change

[Romain Picard <romain.picard@oakbits.com>]

After changing the type of a file in the git repository, it is not possible to
"git p4 publish" the commit to perforce. This is due to the fact that the git
"T" status is not handled in git-p4.py. This can typically occur when replacing
an existing file with a symbolic link.

The "T" modifier is now supported in git-p4.py. When a file type has changed,
inform perforce with the "p4 edit -f auto" command.

Signed-off-by: Romain Picard <romain.picard@oakbits.com>
---
 git-p4.py                         |  9 +++--
 t/t9827-git-p4-change-filetype.sh | 69 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+), 2 deletions(-)
 create mode 100755 t/t9827-git-p4-change-filetype.sh

diff --git a/git-p4.py b/git-p4.py
index a7ec118..b7a3494 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -240,8 +240,8 @@ def p4_add(f):
 def p4_delete(f):
     p4_system(["delete", wildcard_encode(f)])
 
-def p4_edit(f):
-    p4_system(["edit", wildcard_encode(f)])
+def p4_edit(f, *options):
+    p4_system(["edit"] + list(options) + [wildcard_encode(f)])
 
 def p4_revert(f):
     p4_system(["revert", wildcard_encode(f)])
@@ -1344,6 +1344,7 @@ class P4Submit(Command, P4UserMap):
 
         diff = read_pipe_lines("git diff-tree -r %s \"%s^\" \"%s\"" % (self.diffOpts, id, id))
         filesToAdd = set()
+        filesToChangeType = set()
         filesToDelete = set()
         editedFiles = set()
         pureRenameCopy = set()
@@ -1404,6 +1405,8 @@ class P4Submit(Command, P4UserMap):
                     os.unlink(dest)
                     filesToDelete.add(src)
                 editedFiles.add(dest)
+            elif modifier == "T":
+                filesToChangeType.add(path)
             else:
                 die("unknown modifier %s for %s" % (modifier, path))
 
@@ -1463,6 +1466,8 @@ class P4Submit(Command, P4UserMap):
         #
         system(applyPatchCmd)
 
+        for f in filesToChangeType:
+            p4_edit(f, "-t", "auto")
         for f in filesToAdd:
             p4_add(f)
         for f in filesToDelete:
diff --git a/t/t9827-git-p4-change-filetype.sh b/t/t9827-git-p4-change-filetype.sh
new file mode 100755
index 0000000..b0a9f62
--- /dev/null
+++ b/t/t9827-git-p4-change-filetype.sh
@@ -0,0 +1,69 @@
+#!/bin/sh
+#
+# Copyright (c) 2016 Romain Picard
+#
+
+test_description='git p4 support for file type change'
+
+. ./lib-git-p4.sh
+
+test_expect_success 'start p4d' '
+	start_p4d
+'
+
+test_expect_success 'create files' '
+	(
+		cd "$cli" &&
+		p4 client -o | sed "/LineEnd/s/:.*/:unix/" | p4 client -i &&
+		cat >file1 <<-EOF &&
+		This is a first file.
+		EOF
+		cat >file2 <<-EOF &&
+		This is a second file whose type will change.
+		EOF
+		p4 add file1 file2 &&
+		p4 submit -d "add files"
+	)
+'
+
+test_expect_success 'change file to symbolic link' '
+	git p4 clone --dest="$git" //depot@all &&
+	test_when_finished cleanup_git &&
+	(
+		cd "$git" &&
+		git config git-p4.skipSubmitEdit true &&
+
+		rm file2 &&
+		ln -s file1 file2 &&
+		git add file2 &&
+		git commit -m "symlink file1 to file2" &&
+		git p4 submit &&
+		p4 filelog -m 1 //depot/file2 >filelog &&
+		grep "(symlink)" filelog
+	)
+'
+
+test_expect_success 'change symbolic link to file' '
+	git p4 clone --dest="$git" //depot@all &&
+	test_when_finished cleanup_git &&
+	(
+		cd "$git" &&
+		git config git-p4.skipSubmitEdit true &&
+
+		rm file2 &&
+		cat >file2 <<-EOF &&
+		This is another content for the second file.
+		EOF
+		git add file2 &&
+		git commit -m "re-write file2" &&
+		git p4 submit &&
+		p4 filelog -m 1 //depot/file2 >filelog &&
+		grep "(text)" filelog
+	)
+'
+
+test_expect_success 'kill p4d' '
+	kill_p4d
+'
+
+test_done
-- 
2.6.4