[PATCH/RFC] Teach fast-import to import subtrees named by tree id
- From
Jonathan Nieder <jrnieder@gmail.com>
- Date
- Jul 1, 2010, 03:18 UTC
- Message-ID
- <20100701031819.GA12524@burratino>
To simulate the svn cp command, it would be very useful to be replace an arbitrary file in the current revision by an arbitrary directory from a previous one. Modify the filemodify command to allow that:
M 040000 <tree id> pathname
This would be most useful in combination with a facility to print the commit ids for new revisions as they are written.
Cc: Shawn O. Pearce <spearce@spearce.org> Cc: Sverre Rabbelier <srabbelier@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> --- I actually thought fast-import already did this until David mentioned that no, it does not. Well, live and learn.
This and Sverre’s --print-marks command would allow svn-fe to be simplified a great deal.
I was not sure whether to add a "feature" specification for this, so I’ll try that as a separate patch.
Thoughts? Jonathan
Documentation/git-fast-import.txt | 8 ++++- fast-import.c | 24 ++++++++++------ t/t9300-fast-import.sh | 54 +++++++++++++++++++++++++++++++++++++ 3 files changed, 75 insertions(+), 11 deletions(-)
diff --git a/Documentation/git-fast-import.txt b/Documentation/git-fast-import.txt index 19082b0..f4d9aeb 100644 --- a/Documentation/git-fast-import.txt +++ b/Documentation/git-fast-import.txt @@ -482,9 +482,11 @@ External data format:: 'M' SP <mode> SP <dataref> SP <path> LF .... + -Here `<dataref>` can be either a mark reference (`:<idnum>`) +Here usually `<dataref>` must be either a mark reference (`:<idnum>`) set by a prior `blob` command, or a full 40-byte SHA-1 of an -existing Git blob object. +existing Git blob object. If `<mode>` is `040000`` then +`<dataref>` must be the full 40-byte SHA-1 of an existing +Git tree object or a mark reference set with `--import-marks`. Inline data format:: The data content for the file has not been supplied yet. @@ -509,6 +511,8 @@ in octal. Git only supports the following modes: * `160000`: A gitlink, SHA-1 of the object refers to a commit in another repository. Git links can only be specified by SHA or through a commit mark. They are used to implement submodules. +* `040000`: A subdirectory. Subdirectories can only be specified by + SHA or through a tree mark set with `--import-marks`. In both formats `<path>` is the complete path of the file to be added (if not already existing) or modified (if already existing). diff --git a/fast-import.c b/fast-import.c index 1e5d66e..ad6843a 100644 --- a/fast-import.c +++ b/fast-import.c @@ -2131,6 +2131,7 @@ static void file_change_m(struct branch *b) case S_IFREG | 0644: case S_IFREG | 0755: case S_IFLNK: + case S_IFDIR: case S_IFGITLINK: /* ok */ break; @@ -2176,23 +2177,28 @@ static void file_change_m(struct branch *b) * another repository. */ } else if (inline_data) { + if (S_ISDIR(mode)) + die("Directories cannot be specified 'inline': %s", + command_buf.buf); if (p != uq.buf) { strbuf_addstr(&uq, p); p = uq.buf; } read_next_command(); parse_and_store_blob(&last_blob, sha1, 0); - } else if (oe) { - if (oe->type != OBJ_BLOB) - die("Not a blob (actually a %s): %s", - typename(oe->type), command_buf.buf); } else { - enum object_type type = sha1_object_info(sha1, NULL); + enum object_type expected = S_ISDIR(mode) ? + OBJ_TREE: OBJ_BLOB; + enum object_type type = oe ? oe->type : + sha1_object_info(sha1, NULL); if (type < 0) - die("Blob not found: %s", command_buf.buf); - if (type != OBJ_BLOB) - die("Not a blob (actually a %s): %s", - typename(type), command_buf.buf); + die("%s not found: %s", + S_ISDIR(mode) ? "Tree" : "Blob", + command_buf.buf); + if (type != expected) + die("Not a %s (actually a %s): %s", + typename(expected), typename(type), + command_buf.buf); } tree_content_set(&b->branch_tree, p, sha1, mode, NULL); diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh index 131f032..50d5913 100755 --- a/t/t9300-fast-import.sh +++ b/t/t9300-fast-import.sh @@ -796,6 +796,60 @@ test_expect_success \ 'git fast-import <input && test `git rev-parse N2^{tree}` = `git rev-parse N3^{tree}`' +test_expect_success \ + 'N: copy directory by id' \ + 'cat >expect <<-\EOF && + :100755 100755 f1fb5da718392694d0076d677d6d0e364c79b0bc f1fb5da718392694d0076d677d6d0e364c79b0bc C100 file2/newf file3/newf + :100644 100644 7123f7f44e39be127c5eb701e5968176ee9d78b1 7123f7f44e39be127c5eb701e5968176ee9d78b1 C100 file2/oldf file3/oldf + EOF + subdir=$(git rev-parse refs/heads/branch^0:file2) && + cat >input <<-INPUT_END && + commit refs/heads/N4 + committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE + data <<COMMIT + copy by tree hash + COMMIT + + from refs/heads/branch^0 + M 040000 $subdir file3 + INPUT_END + git fast-import <input && + git diff-tree -C --find-copies-harder -r N4^ N4 >actual && + compare_diff_raw expect actual' + +test_expect_success \ + 'N: modify copied tree' \ + 'cat >expect <<-\EOF && + :100644 100644 fcf778cda181eaa1cbc9e9ce3a2e15ee9f9fe791 fcf778cda181eaa1cbc9e9ce3a2e15ee9f9fe791 C100 newdir/interesting file3/file5 + :100755 100755 f1fb5da718392694d0076d677d6d0e364c79b0bc f1fb5da718392694d0076d677d6d0e364c79b0bc C100 file2/newf file3/newf + :100644 100644 7123f7f44e39be127c5eb701e5968176ee9d78b1 7123f7f44e39be127c5eb701e5968176ee9d78b1 C100 file2/oldf file3/oldf + EOF + subdir=$(git rev-parse refs/heads/branch^0:file2) && + cat >input <<-INPUT_END && + commit refs/heads/N5 + committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE + data <<COMMIT + copy by tree hash + COMMIT + + from refs/heads/branch^0 + M 040000 $subdir file3 + + commit refs/heads/N5 + committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE + data <<COMMIT + modify directory copy + COMMIT + + M 644 inline file3/file5 + data <<EOF + $file5_data + EOF + INPUT_END + git fast-import <input && + git diff-tree -C --find-copies-harder -r N5^^ N5 >actual && + compare_diff_raw expect actual' + ### ### series O ###
-- 1.7.1.1