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merge-tree: provide easy access to ls-files -u style info

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Much like `git merge` updates the index with information of the form
    (mode, oid, stage, name)
provide this output for conflicted files for merge-tree as well.
Provide a --name-only option for users to exclude the mode, oid, and
stage and only get the list of conflicted filenames.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren 2022-06-18 00:20:53 +00:00 committed by Junio C Hamano
parent 7fa3338870
commit b520bc6caa
3 changed files with 62 additions and 9 deletions
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34
Documentation/git-merge-tree.txt
View File

@ -40,6 +40,13 @@ After the merge completes, a new toplevel tree object is created. See
OPTIONS
-------
--name-only::
In the Conflicted file info section, instead of writing a list
of (mode, oid, stage, path) tuples to output for conflicted
files, just provide a list of filenames with conflicts (and
do not list filenames multiple times if they have multiple
conflicting stages).
--[no-]messages::
Write any informational messages such as "Auto-merging <path>"
or CONFLICT notices to the end of stdout. If unspecified, the
@ -58,7 +65,7 @@ line:
Whereas for a conflicted merge, the output is by default of the form:
<OID of toplevel tree>
<Conflicted file list>
<Conflicted file info>
<Informational messages>
These are discussed individually below.
@ -72,19 +79,24 @@ working tree at the end of `git merge`. If there were conflicts, then
files within this tree may have embedded conflict markers.
[[CFI]]
Conflicted file list
Conflicted file info
~~~~~~~~~~~~~~~~~~~~
This is a sequence of lines containing a filename on each line, quoted
as explained for the configuration variable `core.quotePath` (see
linkgit:git-config[1]).
This is a sequence of lines with the format
<mode> <object> <stage> <filename>
The filename will be quoted as explained for the configuration
variable `core.quotePath` (see linkgit:git-config[1]). However, if
the `--name-only` option is passed, the mode, object, and stage will
be omitted.
[[IM]]
Informational messages
~~~~~~~~~~~~~~~~~~~~~~
This always starts with a blank line to separate it from the previous
section, and then has free-form messages about the merge, such as:
sections, and then has free-form messages about the merge, such as:
* "Auto-merging <file>"
* "CONFLICT (rename/delete): <oldfile> renamed...but deleted in..."
@ -116,6 +128,16 @@ used as a part of a series of steps such as:
Note that when the exit status is non-zero, `NEWTREE` in this sequence
will contain a lot more output than just a tree.
For conflicts, the output includes the same information that you'd get
with linkgit:git-merge[1]:
* what would be written to the working tree (the
<<OIDTLT,OID of toplevel tree>>)
* the higher order stages that would be written to the index (the
<<CFI,Conflicted file info>>)
* any messages that would have been printed to stdout (the
<<IM,Informational messages>>)
[[DEPMERGE]]
DEPRECATED DESCRIPTION
----------------------

11
builtin/merge-tree.c
View File

@ -400,6 +400,7 @@ enum mode {
struct merge_tree_options {
int mode;
int show_messages;
int name_only;
};
static int real_merge(struct merge_tree_options *o,
@ -453,7 +454,11 @@ static int real_merge(struct merge_tree_options *o,
merge_get_conflicted_files(&result, &conflicted_files);
for (i = 0; i < conflicted_files.nr; i++) {
const char *name = conflicted_files.items[i].string;
if (last && !strcmp(last, name))
struct stage_info *c = conflicted_files.items[i].util;
if (!o->name_only)
printf("%06o %s %d\t",
c->mode, oid_to_hex(&c->oid), c->stage);
else if (last && !strcmp(last, name))
continue;
write_name_quoted_relative(
name, prefix, stdout, line_termination);
@ -488,6 +493,10 @@ int cmd_merge_tree(int argc, const char **argv, const char *prefix)
N_("do a trivial merge only"), MODE_TRIVIAL),
OPT_BOOL(0, "messages", &o.show_messages,
N_("also show informational/conflict messages")),
OPT_BOOL_F(0, "name-only",
&o.name_only,
N_("list filenames without modes/oids/stages"),
PARSE_OPT_NONEG),
OPT_END()
};

26
t/t4301-merge-tree-write-tree.sh
View File

@ -65,6 +65,7 @@ test_expect_success 'Content merge and a few conflicts' '
expected_tree=$(git rev-parse AUTO_MERGE) &&
# We will redo the merge, while we are still in a conflicted state!
git ls-files -u >conflicted-file-info &&
test_when_finished "git reset --hard" &&
test_expect_code 1 git merge-tree --write-tree side1 side2 >RESULT &&
@ -108,7 +109,7 @@ anonymize_hash() {
}
test_expect_success 'test conflict notices and such' '
test_expect_code 1 git merge-tree --write-tree side1 side2 >out &&
test_expect_code 1 git merge-tree --write-tree --name-only side1 side2 >out &&
anonymize_hash out >actual &&
# Expected results:
@ -143,7 +144,7 @@ do
done
test_expect_success 'Just the conflicted files without the messages' '
test_expect_code 1 git merge-tree --write-tree --no-messages side1 side2 >out &&
test_expect_code 1 git merge-tree --write-tree --no-messages --name-only side1 side2 >out &&
anonymize_hash out >actual &&
test_write_lines HASH greeting whatever~side1 >expect &&
@ -151,4 +152,25 @@ test_expect_success 'Just the conflicted files without the messages' '
test_cmp expect actual
'
test_expect_success 'Check conflicted oids and modes without messages' '
test_expect_code 1 git merge-tree --write-tree --no-messages side1 side2 >out &&
anonymize_hash out >actual &&
# Compare the basic output format
q_to_tab >expect <<-\EOF &&
HASH
100644 HASH 1Qgreeting
100644 HASH 2Qgreeting
100644 HASH 3Qgreeting
100644 HASH 1Qwhatever~side1
100644 HASH 2Qwhatever~side1
EOF
test_cmp expect actual &&
# Check the actual hashes against the `ls-files -u` output too
tail -n +2 out | sed -e s/side1/HEAD/ >actual &&
test_cmp conflicted-file-info actual
'
test_done