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authorDavid Barr <david.barr@cordelta.com>2010-12-02 21:40:20 +1100
committerJonathan Nieder <jrnieder@gmail.com>2011-02-26 04:57:58 -0600
commit8dc6a373d201839859fe7924b63e57526ee2fc22 (patch)
treebab104b288613f22fd0139fc11eb5fcf42f29fb5 /t/t9300-fast-import.sh
parent046613c5465e4fc0611f93a5ef31d3815fb50c22 (diff)
downloadgit-8dc6a373d201839859fe7924b63e57526ee2fc22.tar.gz
fast-import: add 'ls' command
Lazy fast-import frontend authors that want to rely on the backend to keep track of the content of the imported trees _almost_ have what they need in the 'cat-blob' command (v1.7.4-rc0~30^2~3, 2010-11-28). But it is not quite enough, since (1) cat-blob can be used to retrieve the content of files, but not their mode, and (2) using cat-blob requires the frontend to keep track of a name (mark number or object id) for each blob to be retrieved Introduce an 'ls' command to complement cat-blob and take care of the remaining needs. The 'ls' command finds what is at a given path within a given tree-ish (tag, commit, or tree): 'ls' SP <dataref> SP <path> LF or in fast-import's active commit: 'ls' SP <path> LF The response is a single line sent through the cat-blob channel, imitating ls-tree output. So for example: FE> ls :1 Documentation gfi> 040000 tree 9e6c2b599341d28a2a375f8207507e0a2a627fe9 Documentation FE> ls 9e6c2b599341d28a2a375f8207507e0a2a627fe9 git-fast-import.txt gfi> 100644 blob 4f92954396e3f0f97e75b6838a5635b583708870 git-fast-import.txt FE> ls :1 RelNotes gfi> 120000 blob b942e499449d97aeb50c73ca2bdc1c6e6d528743 RelNotes FE> cat-blob b942e499449d97aeb50c73ca2bdc1c6e6d528743 gfi> b942e499449d97aeb50c73ca2bdc1c6e6d528743 blob 32 gfi> Documentation/RelNotes/1.7.4.txt The most interesting parts of the reply are the first word, which is a 6-digit octal mode (regular file, executable, symlink, directory, or submodule), and the part from the second space to the tab, which is a <dataref> that can be used in later cat-blob, ls, and filemodify (M) commands to refer to the content (blob, tree, or commit) at that path. If there is nothing there, the response is "missing some/path". The intent is for this command to be used to read files from the active commit, so a frontend can apply patches to them, and to copy files and directories from previous revisions. For example, proposed updates to svn-fe use this command in place of its internal representation of the repository directory structure. This simplifies the frontend a great deal and means support for resuming an import in a separate fast-import run (i.e., incremental import) is basically free. Signed-off-by: David Barr <david.barr@cordelta.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Improved-by: Junio C Hamano <gitster@pobox.com> Improved-by: Sverre Rabbelier <srabbelier@gmail.com>
Diffstat (limited to 't/t9300-fast-import.sh')
-rwxr-xr-xt/t9300-fast-import.sh92
1 files changed, 84 insertions, 8 deletions
diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh
index 52ac0e56dc..6b1ba6c858 100755
--- a/t/t9300-fast-import.sh
+++ b/t/t9300-fast-import.sh
@@ -42,6 +42,14 @@ echo "$@"'
>empty
+test_expect_success 'setup: have pipes?' '
+ rm -f frob &&
+ if mkfifo frob
+ then
+ test_set_prereq PIPE
+ fi
+'
+
###
### series A
###
@@ -898,6 +906,77 @@ test_expect_success \
git diff-tree -C --find-copies-harder -r N4^ N4 >actual &&
compare_diff_raw expect actual'
+test_expect_success PIPE 'N: read and copy directory' '
+ cat >expect <<-\EOF
+ :100755 100755 f1fb5da718392694d0076d677d6d0e364c79b0bc f1fb5da718392694d0076d677d6d0e364c79b0bc C100 file2/newf file3/newf
+ :100644 100644 7123f7f44e39be127c5eb701e5968176ee9d78b1 7123f7f44e39be127c5eb701e5968176ee9d78b1 C100 file2/oldf file3/oldf
+ EOF
+ git update-ref -d refs/heads/N4 &&
+ rm -f backflow &&
+ mkfifo backflow &&
+ (
+ exec <backflow &&
+ cat <<-EOF &&
+ commit refs/heads/N4
+ committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+ data <<COMMIT
+ copy by tree hash, part 2
+ COMMIT
+
+ from refs/heads/branch^0
+ ls "file2"
+ EOF
+ read mode type tree filename &&
+ echo "M 040000 $tree file3"
+ ) |
+ git fast-import --cat-blob-fd=3 3>backflow &&
+ git diff-tree -C --find-copies-harder -r N4^ N4 >actual &&
+ compare_diff_raw expect actual
+'
+
+test_expect_success PIPE 'N: empty directory reads as missing' '
+ cat <<-\EOF >expect &&
+ OBJNAME
+ :000000 100644 OBJNAME OBJNAME A unrelated
+ EOF
+ echo "missing src" >expect.response &&
+ git update-ref -d refs/heads/read-empty &&
+ rm -f backflow &&
+ mkfifo backflow &&
+ (
+ exec <backflow &&
+ cat <<-EOF &&
+ commit refs/heads/read-empty
+ committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+ data <<COMMIT
+ read "empty" (missing) directory
+ COMMIT
+
+ M 100644 inline src/greeting
+ data <<BLOB
+ hello
+ BLOB
+ C src/greeting dst1/non-greeting
+ C src/greeting unrelated
+ # leave behind "empty" src directory
+ D src/greeting
+ ls "src"
+ EOF
+ read -r line &&
+ printf "%s\n" "$line" >response &&
+ cat <<-\EOF
+ D dst1
+ D dst2
+ EOF
+ ) |
+ git fast-import --cat-blob-fd=3 3>backflow &&
+ test_cmp expect.response response &&
+ git rev-list read-empty |
+ git diff-tree -r --root --stdin |
+ sed "s/$_x40/OBJNAME/g" >actual &&
+ test_cmp expect actual
+'
+
test_expect_success \
'N: copy root directory by tree hash' \
'cat >expect <<-\EOF &&
@@ -1861,6 +1940,11 @@ test_expect_success 'R: feature no-relative-marks should be honoured' '
test_cmp marks.new non-relative.out
'
+test_expect_success 'R: feature ls supported' '
+ echo "feature ls" |
+ git fast-import
+'
+
test_expect_success 'R: feature cat-blob supported' '
echo "feature cat-blob" |
git fast-import
@@ -1986,14 +2070,6 @@ test_expect_success 'R: print two blobs to stdout' '
test_cmp expect actual
'
-test_expect_success 'setup: have pipes?' '
- rm -f frob &&
- if mkfifo frob
- then
- test_set_prereq PIPE
- fi
-'
-
test_expect_success PIPE 'R: copy using cat-file' '
expect_id=$(git hash-object big) &&
expect_len=$(wc -c <big) &&