[PATCH v3 4/8] fetch: fix missing from-reference when fetching HEAD:foo
- From
Patrick Steinhardt <ps@pks.im>
- Date
- May 3, 2023, 11:34 UTC
- Message-ID
- <46e1266ab0b13ace9b50bd98c00dbabb566c6cd2.1683113177.git.ps@pks.im>
- In-Reply-To
- <cover.1683113177.git.ps@pks.im>
`store_updated_refs()` parses the remote reference for two purposes:
- It gets used as a note when writing FETCH_HEAD.
- It is passed through to `display_ref_update()` to display
updated references in the following format: ```
* branch master -> master
```In most cases, the parsed remote reference is the prettified reference name and can thus be used for both cases. But if the remote reference is HEAD, the parsed remote reference becomes empty. This is intended when we write the FETCH_HEAD, where we skip writing the note in that case. But it is not intended when displaying the updated references and would cause us to miss the left-hand side of the displayed reference update:
``` $ git fetch origin HEAD:foo From https://github.com/git/git * [new ref] -> foo ```
The HEAD string is clearly missing from the left-hand side of the arrow, which is further stressed by the point that the following commands show the left-hand side as expected:
``` $ git fetch origin HEAD From https://github.com/git/git * branch HEAD -> FETCH_HEAD
$ git fetch origin master From https://github.com/git/git * branch master -> FETCH_HEAD * branch master -> origin/master ```
The logic of how we compute the remote reference name that we ultimately pass to `display_ref_update()` is not easy to follow. There are three different cases here:
- When the remote reference name is "HEAD" we set the remote
reference name to the empty string. This is the case that causes
the bug to occur, where we would indeed want to print "HEAD"
instead of the empty string. This is what `prettify_refname()`
would return. - When the remote reference name has a well-known prefix then we
strip this prefix. This matches what `prettify_refname()` does. - Otherwise, we keep the fully qualified reference name. This also
matches what `prettify_refname()` does.As the return value of `prettify_refname()` would do the correct thing for us in all three cases, we can fix the bug by passing through the full remote reference name to `display_ref_update()`, which learns to call `prettify_refname()`. At the same time, this also simplifies the code a bit.
Note that this patch also changes formatting of the block that computes the "kind" and "what" variables. This is done on purpose so that it is part of the diff, hopefully making the change easier to comprehend.
Signed-off-by: Patrick Steinhardt <ps@pks.im> --- builtin/fetch.c | 37 +++++++++++++++++++------------------ t/t5574-fetch-output.sh | 29 +++++++++++++++++++++++++++++ 2 files changed, 48 insertions(+), 18 deletions(-)
diff --git a/builtin/fetch.c b/builtin/fetch.c index 08d7fc7233..6aecf549e8 100644 --- a/builtin/fetch.c +++ b/builtin/fetch.c @@ -918,12 +918,14 @@ static void display_ref_update(struct display_state *display_state, char code, } width = (summary_width + strlen(summary) - gettext_width(summary)); + remote = prettify_refname(remote); + local = prettify_refname(local); strbuf_addf(&display_state->buf, " %c %-*s ", code, width, summary); if (!display_state->compact_format) - print_remote_to_local(display_state, remote, prettify_refname(local)); + print_remote_to_local(display_state, remote, local); else - print_compact(display_state, remote, prettify_refname(local)); + print_compact(display_state, remote, local); if (error) strbuf_addf(&display_state->buf, " (%s)", error); strbuf_addch(&display_state->buf, '\n'); @@ -934,7 +936,7 @@ static void display_ref_update(struct display_state *display_state, char code, static int update_local_ref(struct ref *ref, struct ref_transaction *transaction, struct display_state *display_state, - const char *remote, const struct ref *remote_ref, + const struct ref *remote_ref, int summary_width) { struct commit *current = NULL, *updated; @@ -946,7 +948,7 @@ static int update_local_ref(struct ref *ref, if (oideq(&ref->old_oid, &ref->new_oid)) { if (verbosity > 0) display_ref_update(display_state, '=', _("[up to date]"), NULL, - remote, ref->name, summary_width); + remote_ref->name, ref->name, summary_width); return 0; } @@ -959,7 +961,7 @@ static int update_local_ref(struct ref *ref, */ display_ref_update(display_state, '!', _("[rejected]"), _("can't fetch into checked-out branch"), - remote, ref->name, summary_width); + remote_ref->name, ref->name, summary_width); return 1; } @@ -970,12 +972,12 @@ static int update_local_ref(struct ref *ref, r = s_update_ref("updating tag", ref, transaction, 0); display_ref_update(display_state, r ? '!' : 't', _("[tag update]"), r ? _("unable to update local ref") : NULL, - remote, ref->name, summary_width); + remote_ref->name, ref->name, summary_width); return r; } else { display_ref_update(display_state, '!', _("[rejected]"), _("would clobber existing tag"), - remote, ref->name, summary_width); + remote_ref->name, ref->name, summary_width); return 1; } } @@ -1008,7 +1010,7 @@ static int update_local_ref(struct ref *ref, r = s_update_ref(msg, ref, transaction, 0); display_ref_update(display_state, r ? '!' : '*', what, r ? _("unable to update local ref") : NULL, - remote, ref->name, summary_width); + remote_ref->name, ref->name, summary_width); return r; } @@ -1030,7 +1032,7 @@ static int update_local_ref(struct ref *ref, r = s_update_ref("fast-forward", ref, transaction, 1); display_ref_update(display_state, r ? '!' : ' ', quickref.buf, r ? _("unable to update local ref") : NULL, - remote, ref->name, summary_width); + remote_ref->name, ref->name, summary_width); strbuf_release(&quickref); return r; } else if (force || ref->force) { @@ -1042,12 +1044,12 @@ static int update_local_ref(struct ref *ref, r = s_update_ref("forced-update", ref, transaction, 1); display_ref_update(display_state, r ? '!' : '+', quickref.buf, r ? _("unable to update local ref") : _("forced update"), - remote, ref->name, summary_width); + remote_ref->name, ref->name, summary_width); strbuf_release(&quickref); return r; } else { display_ref_update(display_state, '!', _("[rejected]"), _("non-fast-forward"), - remote, ref->name, summary_width); + remote_ref->name, ref->name, summary_width); return 1; } } @@ -1252,14 +1254,13 @@ static int store_updated_refs(struct display_state *display_state, if (!strcmp(rm->name, "HEAD")) { kind = ""; what = ""; - } - else if (skip_prefix(rm->name, "refs/heads/", &what)) + } else if (skip_prefix(rm->name, "refs/heads/", &what)) { kind = "branch"; - else if (skip_prefix(rm->name, "refs/tags/", &what)) + } else if (skip_prefix(rm->name, "refs/tags/", &what)) { kind = "tag"; - else if (skip_prefix(rm->name, "refs/remotes/", &what)) + } else if (skip_prefix(rm->name, "refs/remotes/", &what)) { kind = "remote-tracking branch"; - else { + } else { kind = ""; what = rm->name; } @@ -1277,7 +1278,7 @@ static int store_updated_refs(struct display_state *display_state, display_state->url_len); if (ref) { - rc |= update_local_ref(ref, transaction, display_state, what, + rc |= update_local_ref(ref, transaction, display_state, rm, summary_width); free(ref); } else if (write_fetch_head || dry_run) { @@ -1288,7 +1289,7 @@ static int store_updated_refs(struct display_state *display_state, */ display_ref_update(display_state, '*', *kind ? kind : "branch", NULL, - *what ? what : "HEAD", + rm->name, "FETCH_HEAD", summary_width); } } diff --git a/t/t5574-fetch-output.sh b/t/t5574-fetch-output.sh index a09750d225..6e0f7e0046 100755 --- a/t/t5574-fetch-output.sh +++ b/t/t5574-fetch-output.sh @@ -56,6 +56,35 @@ test_expect_success 'fetch compact output' ' test_cmp expect actual ' +test_expect_success 'fetch output with HEAD' ' + test_when_finished "rm -rf head" && + git clone . head && + + git -C head fetch --dry-run origin HEAD >actual.out 2>actual.err && + cat >expect <<-EOF && + From $(test-tool path-utils real_path .)/. + * branch HEAD -> FETCH_HEAD + EOF + test_must_be_empty actual.out && + test_cmp expect actual.err && + + git -C head fetch origin HEAD >actual.out 2>actual.err && + test_must_be_empty actual.out && + test_cmp expect actual.err && + + git -C head fetch --dry-run origin HEAD:foo >actual.out 2>actual.err && + cat >expect <<-EOF && + From $(test-tool path-utils real_path .)/. + * [new ref] HEAD -> foo + EOF + test_must_be_empty actual.out && + test_cmp expect actual.err && + + git -C head fetch origin HEAD:foo >actual.out 2>actual.err && + test_must_be_empty actual.out && + test_cmp expect actual.err +' + test_expect_success '--no-show-forced-updates' ' mkdir forced-updates && (
-- 2.40.1