Although it does not matter for Git itself, tools that
export to systems that explicitly track copies and
renames can benefit from such information.
This patch makes fast-export output correct action
logs when -M or -C are enabled.
Signed-off-by: Alexander Gavrilov <angavrilov@xxxxxxxxx>
---
Added a note to the fast-export documentation. When this patch
is merged, it probably should be updated with the exact version.
-- Alexander
Documentation/git-fast-export.txt | 9 +++++++
builtin-fast-export.c | 28 +++++++++++++++++++++-
t/t9301-fast-export.sh | 46 +++++++++++++++++++++++++++++++++++++
3 files changed, 81 insertions(+), 2 deletions(-)
diff --git a/Documentation/git-fast-export.txt b/Documentation/git-fast-export.txt
index 332346c..699b69e 100644
--- a/Documentation/git-fast-export.txt
+++ b/Documentation/git-fast-export.txt
@@ -36,6 +36,15 @@ when encountering a signed tag. With 'strip', the tags will be made
unsigned, with 'verbatim', they will be silently exported
and with 'warn', they will be exported, but you will see a warning.
+-M, -C::
+ Perform move and/or copy detection, as described in the
+ linkgit:git-diff[1] manual page, and use it to generate
+ rename and copy commands in the output dump.
++
+Note that these options are always accepted by git-fast-import,
+but before a certain version it silently produced wrong results.
+You should always check the git version before using them.
+
EXAMPLES
--------
diff --git a/builtin-fast-export.c b/builtin-fast-export.c
index 8bea269..3225e8f 100644
--- a/builtin-fast-export.c
+++ b/builtin-fast-export.c
@@ -118,10 +118,27 @@ static void show_filemodify(struct diff_queue_struct *q,
{
int i;
for (i = 0; i < q->nr; i++) {
+ struct diff_filespec *ospec = q->queue[i]->one;
struct diff_filespec *spec = q->queue[i]->two;
- if (is_null_sha1(spec->sha1))
+
+ switch (q->queue[i]->status) {
+ case DIFF_STATUS_DELETED:
printf("D %s\n", spec->path);
- else {
+ break;
+
+ case DIFF_STATUS_COPIED:
+ case DIFF_STATUS_RENAMED:
+ printf("%c \"%s\" \"%s\"\n", q->queue[i]->status,
+ ospec->path, spec->path);
+
+ if (!hashcmp(ospec->sha1, spec->sha1) &&
+ ospec->mode == spec->mode)
+ break;
+ /* fallthrough */
+
+ case DIFF_STATUS_TYPE_CHANGED:
+ case DIFF_STATUS_MODIFIED:
+ case DIFF_STATUS_ADDED:
/*
* Links refer to objects in another repositories;
* output the SHA-1 verbatim.
@@ -134,6 +151,13 @@ static void show_filemodify(struct diff_queue_struct *q,
printf("M %06o :%d %s\n", spec->mode,
get_object_mark(object), spec->path);
}
+ break;
+
+ default:
+ die("Unexpected comparison status '%c' for %s, %s",
+ q->queue[i]->status,
+ ospec->path ? ospec->path : "none",
+ spec->path ? spec->path : "none");
}
}
}
diff --git a/t/t9301-fast-export.sh b/t/t9301-fast-export.sh
index f18eec9..bb595b7 100755
--- a/t/t9301-fast-export.sh
+++ b/t/t9301-fast-export.sh
@@ -162,4 +162,50 @@ test_expect_success 'submodule fast-export | fast-import' '
'
+export GIT_AUTHOR_NAME='A U Thor'
+export GIT_COMMITTER_NAME='C O Mitter'
+
+test_expect_success 'setup copies' '
+
+ git config --unset i18n.commitencoding &&
+ git checkout -b copy rein &&
+ git mv file file3 &&
+ git commit -m move1 &&
+ test_tick &&
+ cp file2 file4 &&
+ git add file4 &&
+ git mv file2 file5 &&
+ git commit -m copy1 &&
+ test_tick &&
+ cp file3 file6 &&
+ git add file6 &&
+ git commit -m copy2 &&
+ test_tick &&
+ echo more text >> file6 &&
+ echo even more text >> file6 &&
+ git add file6 &&
+ git commit -m modify &&
+ test_tick &&
+ cp file6 file7 &&
+ echo test >> file7 &&
+ git add file7 &&
+ git commit -m copy_modify
+
+'
+
+test_expect_success 'fast-export -C -C | fast-import' '
+
+ ENTRY=$(git rev-parse --verify copy) &&
+ rm -rf new &&
+ mkdir new &&
+ git --git-dir=new/.git init &&
+ git fast-export -C -C --signed-tags=strip --all > output &&
+ grep "^C \"file6\" \"file7\"\$" output &&
+ cat output |
+ (cd new &&
+ git fast-import &&
+ test $ENTRY = $(git rev-parse --verify refs/heads/copy))
+
+'
+
test_done
--
1.5.6.3.18.gfe82
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