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authorJunio C Hamano <gitster@pobox.com>2017-12-28 22:08:50 (GMT)
committerJunio C Hamano <gitster@pobox.com>2017-12-28 22:08:50 (GMT)
commit556de1a8e38ff03d31fd35751582447001f39d0c (patch)
tree312f912aa8071e9011bb5ac96657192257dafb88
parent0433d533f13671f4313c31e34707f0f5281a18e0 (diff)
parent644eb60bd01a15f665b63774fd80e3b6316073a1 (diff)
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Merge branch 'sb/describe-blob'
"git describe" was taught to dig trees deeper to find a <commit-ish>:<path> that refers to a given blob object. * sb/describe-blob: builtin/describe.c: describe a blob builtin/describe.c: factor out describe_commit builtin/describe.c: print debug statements earlier builtin/describe.c: rename `oid` to avoid variable shadowing revision.h: introduce blob/tree walking in order of the commits list-objects.c: factor out traverse_trees_and_blobs t6120: fix typo in test name
-rw-r--r--Documentation/git-describe.txt18
-rw-r--r--Documentation/rev-list-options.txt5
-rw-r--r--builtin/describe.c121
-rw-r--r--list-objects.c67
-rw-r--r--revision.c2
-rw-r--r--revision.h3
-rwxr-xr-xt/t6100-rev-list-in-order.sh77
-rwxr-xr-xt/t6120-describe.sh36
8 files changed, 277 insertions, 52 deletions
diff --git a/Documentation/git-describe.txt b/Documentation/git-describe.txt
index c924c94..e027fb8 100644
--- a/Documentation/git-describe.txt
+++ b/Documentation/git-describe.txt
@@ -3,14 +3,14 @@ git-describe(1)
NAME
----
-git-describe - Describe a commit using the most recent tag reachable from it
-
+git-describe - Give an object a human readable name based on an available ref
SYNOPSIS
--------
[verse]
'git describe' [--all] [--tags] [--contains] [--abbrev=<n>] [<commit-ish>...]
'git describe' [--all] [--tags] [--contains] [--abbrev=<n>] --dirty[=<mark>]
+'git describe' <blob>
DESCRIPTION
-----------
@@ -24,6 +24,12 @@ By default (without --all or --tags) `git describe` only shows
annotated tags. For more information about creating annotated tags
see the -a and -s options to linkgit:git-tag[1].
+If the given object refers to a blob, it will be described
+as `<commit-ish>:<path>`, such that the blob can be found
+at `<path>` in the `<commit-ish>`, which itself describes the
+first commit in which this blob occurs in a reverse revision walk
+from HEAD.
+
OPTIONS
-------
<commit-ish>...::
@@ -186,6 +192,14 @@ selected and output. Here fewest commits different is defined as
the number of commits which would be shown by `git log tag..input`
will be the smallest number of commits possible.
+BUGS
+----
+
+Tree objects as well as tag objects not pointing at commits, cannot be described.
+When describing blobs, the lightweight tags pointing at blobs are ignored,
+but the blob is still described as <committ-ish>:<path> despite the lightweight
+tag being favorable.
+
GIT
---
Part of the linkgit:git[1] suite
diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index 8d8b7f4..22f5c9b 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -686,6 +686,11 @@ ifdef::git-rev-list[]
all object IDs which I need to download if I have the commit
object _bar_ but not _foo_''.
+--in-commit-order::
+ Print tree and blob ids in order of the commits. The tree
+ and blob ids are printed after they are first referenced
+ by a commit.
+
--objects-edge::
Similar to `--objects`, but also print the IDs of excluded
commits prefixed with a ``-'' character. This is used by
diff --git a/builtin/describe.c b/builtin/describe.c
index e14e162..3b0b204 100644
--- a/builtin/describe.c
+++ b/builtin/describe.c
@@ -3,6 +3,7 @@
#include "lockfile.h"
#include "commit.h"
#include "tag.h"
+#include "blob.h"
#include "refs.h"
#include "builtin.h"
#include "exec_cmd.h"
@@ -12,6 +13,8 @@
#include "hashmap.h"
#include "argv-array.h"
#include "run-command.h"
+#include "revision.h"
+#include "list-objects.h"
#define MAX_TAGS (FLAG_BITS - 1)
@@ -256,7 +259,7 @@ static unsigned long finish_depth_computation(
return seen_commits;
}
-static void display_name(struct commit_name *n)
+static void append_name(struct commit_name *n, struct strbuf *dst)
{
if (n->prio == 2 && !n->tag) {
n->tag = lookup_tag(&n->oid);
@@ -272,19 +275,18 @@ static void display_name(struct commit_name *n)
}
if (n->tag)
- printf("%s", n->tag->tag);
+ strbuf_addstr(dst, n->tag->tag);
else
- printf("%s", n->path);
+ strbuf_addstr(dst, n->path);
}
-static void show_suffix(int depth, const struct object_id *oid)
+static void append_suffix(int depth, const struct object_id *oid, struct strbuf *dst)
{
- printf("-%d-g%s", depth, find_unique_abbrev(oid->hash, abbrev));
+ strbuf_addf(dst, "-%d-g%s", depth, find_unique_abbrev(oid->hash, abbrev));
}
-static void describe(const char *arg, int last_one)
+static void describe_commit(struct object_id *oid, struct strbuf *dst)
{
- struct object_id oid;
struct commit *cmit, *gave_up_on = NULL;
struct commit_list *list;
struct commit_name *n;
@@ -293,30 +295,25 @@ static void describe(const char *arg, int last_one)
unsigned long seen_commits = 0;
unsigned int unannotated_cnt = 0;
- if (get_oid(arg, &oid))
- die(_("Not a valid object name %s"), arg);
- cmit = lookup_commit_reference(&oid);
- if (!cmit)
- die(_("%s is not a valid '%s' object"), arg, commit_type);
+ cmit = lookup_commit_reference(oid);
n = find_commit_name(&cmit->object.oid);
if (n && (tags || all || n->prio == 2)) {
/*
* Exact match to an existing ref.
*/
- display_name(n);
+ append_name(n, dst);
if (longformat)
- show_suffix(0, n->tag ? &n->tag->tagged->oid : &oid);
+ append_suffix(0, n->tag ? &n->tag->tagged->oid : oid, dst);
if (suffix)
- printf("%s", suffix);
- printf("\n");
+ strbuf_addstr(dst, suffix);
return;
}
if (!max_candidates)
die(_("no tag exactly matches '%s'"), oid_to_hex(&cmit->object.oid));
if (debug)
- fprintf(stderr, _("searching to describe %s\n"), arg);
+ fprintf(stderr, _("No exact match on refs or tags, searching to describe\n"));
if (!have_util) {
struct hashmap_iter iter;
@@ -381,22 +378,21 @@ static void describe(const char *arg, int last_one)
}
if (!match_cnt) {
- struct object_id *oid = &cmit->object.oid;
+ struct object_id *cmit_oid = &cmit->object.oid;
if (always) {
- printf("%s", find_unique_abbrev(oid->hash, abbrev));
+ strbuf_addstr(dst, find_unique_abbrev(cmit_oid->hash, abbrev));
if (suffix)
- printf("%s", suffix);
- printf("\n");
+ strbuf_addstr(dst, suffix);
return;
}
if (unannotated_cnt)
die(_("No annotated tags can describe '%s'.\n"
"However, there were unannotated tags: try --tags."),
- oid_to_hex(oid));
+ oid_to_hex(cmit_oid));
else
die(_("No tags can describe '%s'.\n"
"Try --always, or create some tags."),
- oid_to_hex(oid));
+ oid_to_hex(cmit_oid));
}
QSORT(all_matches, match_cnt, compare_pt);
@@ -434,15 +430,86 @@ static void describe(const char *arg, int last_one)
}
}
- display_name(all_matches[0].name);
+ append_name(all_matches[0].name, dst);
if (abbrev)
- show_suffix(all_matches[0].depth, &cmit->object.oid);
+ append_suffix(all_matches[0].depth, &cmit->object.oid, dst);
if (suffix)
- printf("%s", suffix);
- printf("\n");
+ strbuf_addstr(dst, suffix);
+}
+
+struct process_commit_data {
+ struct object_id current_commit;
+ struct object_id looking_for;
+ struct strbuf *dst;
+ struct rev_info *revs;
+};
+
+static void process_commit(struct commit *commit, void *data)
+{
+ struct process_commit_data *pcd = data;
+ pcd->current_commit = commit->object.oid;
+}
+
+static void process_object(struct object *obj, const char *path, void *data)
+{
+ struct process_commit_data *pcd = data;
+
+ if (!oidcmp(&pcd->looking_for, &obj->oid) && !pcd->dst->len) {
+ reset_revision_walk();
+ describe_commit(&pcd->current_commit, pcd->dst);
+ strbuf_addf(pcd->dst, ":%s", path);
+ free_commit_list(pcd->revs->commits);
+ pcd->revs->commits = NULL;
+ }
+}
+
+static void describe_blob(struct object_id oid, struct strbuf *dst)
+{
+ struct rev_info revs;
+ struct argv_array args = ARGV_ARRAY_INIT;
+ struct process_commit_data pcd = { null_oid, oid, dst, &revs};
+
+ argv_array_pushl(&args, "internal: The first arg is not parsed",
+ "--objects", "--in-commit-order", "--reverse", "HEAD",
+ NULL);
+
+ init_revisions(&revs, NULL);
+ if (setup_revisions(args.argc, args.argv, &revs, NULL) > 1)
+ BUG("setup_revisions could not handle all args?");
+
+ if (prepare_revision_walk(&revs))
+ die("revision walk setup failed");
+
+ traverse_commit_list(&revs, process_commit, process_object, &pcd);
+ reset_revision_walk();
+}
+
+static void describe(const char *arg, int last_one)
+{
+ struct object_id oid;
+ struct commit *cmit;
+ struct strbuf sb = STRBUF_INIT;
+
+ if (debug)
+ fprintf(stderr, _("describe %s\n"), arg);
+
+ if (get_oid(arg, &oid))
+ die(_("Not a valid object name %s"), arg);
+ cmit = lookup_commit_reference_gently(&oid, 1);
+
+ if (cmit)
+ describe_commit(&oid, &sb);
+ else if (lookup_blob(&oid))
+ describe_blob(oid, &sb);
+ else
+ die(_("%s is neither a commit nor blob"), arg);
+
+ puts(sb.buf);
if (!last_one)
clear_commit_marks(cmit, -1);
+
+ strbuf_release(&sb);
}
int cmd_describe(int argc, const char **argv, const char *prefix)
diff --git a/list-objects.c b/list-objects.c
index d9e83d0..0966cdc 100644
--- a/list-objects.c
+++ b/list-objects.c
@@ -214,27 +214,17 @@ static void add_pending_tree(struct rev_info *revs, struct tree *tree)
add_pending_object(revs, &tree->object, "");
}
-static void do_traverse(struct rev_info *revs,
- show_commit_fn show_commit,
- show_object_fn show_object,
- void *show_data,
- filter_object_fn filter_fn,
- void *filter_data)
+static void traverse_trees_and_blobs(struct rev_info *revs,
+ struct strbuf *base,
+ show_object_fn show_object,
+ void *show_data,
+ filter_object_fn filter_fn,
+ void *filter_data)
{
int i;
- struct commit *commit;
- struct strbuf base;
- strbuf_init(&base, PATH_MAX);
- while ((commit = get_revision(revs)) != NULL) {
- /*
- * an uninteresting boundary commit may not have its tree
- * parsed yet, but we are not going to show them anyway
- */
- if (commit->tree)
- add_pending_tree(revs, commit->tree);
- show_commit(commit, show_data);
- }
+ assert(base->len == 0);
+
for (i = 0; i < revs->pending.nr; i++) {
struct object_array_entry *pending = revs->pending.objects + i;
struct object *obj = pending->item;
@@ -251,13 +241,13 @@ static void do_traverse(struct rev_info *revs,
path = "";
if (obj->type == OBJ_TREE) {
process_tree(revs, (struct tree *)obj, show_object,
- &base, path, show_data,
+ base, path, show_data,
filter_fn, filter_data);
continue;
}
if (obj->type == OBJ_BLOB) {
process_blob(revs, (struct blob *)obj, show_object,
- &base, path, show_data,
+ base, path, show_data,
filter_fn, filter_data);
continue;
}
@@ -265,7 +255,42 @@ static void do_traverse(struct rev_info *revs,
oid_to_hex(&obj->oid), name);
}
object_array_clear(&revs->pending);
- strbuf_release(&base);
+}
+
+static void do_traverse(struct rev_info *revs,
+ show_commit_fn show_commit,
+ show_object_fn show_object,
+ void *show_data,
+ filter_object_fn filter_fn,
+ void *filter_data)
+{
+ struct commit *commit;
+ struct strbuf csp; /* callee's scratch pad */
+ strbuf_init(&csp, PATH_MAX);
+
+ while ((commit = get_revision(revs)) != NULL) {
+ /*
+ * an uninteresting boundary commit may not have its tree
+ * parsed yet, but we are not going to show them anyway
+ */
+ if (commit->tree)
+ add_pending_tree(revs, commit->tree);
+ show_commit(commit, show_data);
+
+ if (revs->tree_blobs_in_commit_order)
+ /*
+ * NEEDSWORK: Adding the tree and then flushing it here
+ * needs a reallocation for each commit. Can we pass the
+ * tree directory without allocation churn?
+ */
+ traverse_trees_and_blobs(revs, &csp,
+ show_object, show_data,
+ filter_fn, filter_data);
+ }
+ traverse_trees_and_blobs(revs, &csp,
+ show_object, show_data,
+ filter_fn, filter_data);
+ strbuf_release(&csp);
}
void traverse_commit_list(struct rev_info *revs,
diff --git a/revision.c b/revision.c
index f6a3da5..72f2b45 100644
--- a/revision.c
+++ b/revision.c
@@ -1855,6 +1855,8 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
revs->dense = 0;
} else if (!strcmp(arg, "--show-all")) {
revs->show_all = 1;
+ } else if (!strcmp(arg, "--in-commit-order")) {
+ revs->tree_blobs_in_commit_order = 1;
} else if (!strcmp(arg, "--remove-empty")) {
revs->remove_empty_trees = 1;
} else if (!strcmp(arg, "--merges")) {
diff --git a/revision.h b/revision.h
index 747bce8..19dc9bd 100644
--- a/revision.h
+++ b/revision.h
@@ -121,7 +121,8 @@ struct rev_info {
bisect:1,
ancestry_path:1,
first_parent_only:1,
- line_level_traverse:1;
+ line_level_traverse:1,
+ tree_blobs_in_commit_order:1;
/* Diff flags */
unsigned int diff:1,
diff --git a/t/t6100-rev-list-in-order.sh b/t/t6100-rev-list-in-order.sh
new file mode 100755
index 0000000..b2bb0a7
--- /dev/null
+++ b/t/t6100-rev-list-in-order.sh
@@ -0,0 +1,77 @@
+#!/bin/sh
+
+test_description='rev-list testing in-commit-order'
+
+. ./test-lib.sh
+
+test_expect_success 'setup a commit history with trees, blobs' '
+ for x in one two three four
+ do
+ echo $x >$x &&
+ git add $x &&
+ git commit -m "add file $x" ||
+ return 1
+ done &&
+ for x in four three
+ do
+ git rm $x &&
+ git commit -m "remove $x" ||
+ return 1
+ done
+'
+
+test_expect_success 'rev-list --in-commit-order' '
+ git rev-list --in-commit-order --objects HEAD >actual.raw &&
+ cut -c 1-40 >actual <actual.raw &&
+
+ git cat-file --batch-check="%(objectname)" >expect.raw <<-\EOF &&
+ HEAD^{commit}
+ HEAD^{tree}
+ HEAD^{tree}:one
+ HEAD^{tree}:two
+ HEAD~1^{commit}
+ HEAD~1^{tree}
+ HEAD~1^{tree}:three
+ HEAD~2^{commit}
+ HEAD~2^{tree}
+ HEAD~2^{tree}:four
+ HEAD~3^{commit}
+ # HEAD~3^{tree} skipped, same as HEAD~1^{tree}
+ HEAD~4^{commit}
+ # HEAD~4^{tree} skipped, same as HEAD^{tree}
+ HEAD~5^{commit}
+ HEAD~5^{tree}
+ EOF
+ grep -v "#" >expect <expect.raw &&
+
+ test_cmp expect actual
+'
+
+test_expect_success 'rev-list lists blobs and trees after commits' '
+ git rev-list --objects HEAD >actual.raw &&
+ cut -c 1-40 >actual <actual.raw &&
+
+ git cat-file --batch-check="%(objectname)" >expect.raw <<-\EOF &&
+ HEAD^{commit}
+ HEAD~1^{commit}
+ HEAD~2^{commit}
+ HEAD~3^{commit}
+ HEAD~4^{commit}
+ HEAD~5^{commit}
+ HEAD^{tree}
+ HEAD^{tree}:one
+ HEAD^{tree}:two
+ HEAD~1^{tree}
+ HEAD~1^{tree}:three
+ HEAD~2^{tree}
+ HEAD~2^{tree}:four
+ # HEAD~3^{tree} skipped, same as HEAD~1^{tree}
+ # HEAD~4^{tree} skipped, same as HEAD^{tree}
+ HEAD~5^{tree}
+ EOF
+ grep -v "#" >expect <expect.raw &&
+
+ test_cmp expect actual
+'
+
+test_done
diff --git a/t/t6120-describe.sh b/t/t6120-describe.sh
index 1c0e865..3e3fb46 100755
--- a/t/t6120-describe.sh
+++ b/t/t6120-describe.sh
@@ -304,12 +304,46 @@ test_expect_success 'describe chokes on severely broken submodules' '
mv .git/modules/sub1/ .git/modules/sub_moved &&
test_must_fail git describe --dirty
'
-test_expect_success 'describe ignoring a borken submodule' '
+test_expect_success 'describe ignoring a broken submodule' '
git describe --broken >out &&
test_when_finished "mv .git/modules/sub_moved .git/modules/sub1" &&
grep broken out
'
+test_expect_success 'describe a blob at a directly tagged commit' '
+ echo "make it a unique blob" >file &&
+ git add file && git commit -m "content in file" &&
+ git tag -a -m "latest annotated tag" unique-file &&
+ git describe HEAD:file >actual &&
+ echo "unique-file:file" >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'describe a blob with its first introduction' '
+ git commit --allow-empty -m "empty commit" &&
+ git rm file &&
+ git commit -m "delete blob" &&
+ git revert HEAD &&
+ git commit --allow-empty -m "empty commit" &&
+ git describe HEAD:file >actual &&
+ echo "unique-file:file" >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'describe directly tagged blob' '
+ git tag test-blob unique-file:file &&
+ git describe test-blob >actual &&
+ echo "unique-file:file" >expect &&
+ # suboptimal: we rather want to see "test-blob"
+ test_cmp expect actual
+'
+
+test_expect_success 'describe tag object' '
+ git tag test-blob-1 -a -m msg unique-file:file &&
+ test_must_fail git describe test-blob-1 2>actual &&
+ test_i18ngrep "fatal: test-blob-1 is neither a commit nor blob" actual
+'
+
test_expect_failure ULIMIT_STACK_SIZE 'name-rev works in a deep repo' '
i=1 &&
while test $i -lt 8000