From ee76f92fe883305c1260952f5b325b0503311fc9 Mon Sep 17 00:00:00 2001 From: Mike Hommey Date: Thu, 8 Oct 2015 11:54:43 +0900 Subject: [PATCH] notes: allow treeish expressions as notes ref init_notes() is the main point of entry to the notes API. It ensures that the input can be used as ref, because it needs a ref to update to store notes tree after modifying it. There however are many use cases where notes tree is only read, e.g. "git log --notes=...". Any notes-shaped treeish could be used for such purpose, but it is not allowed due to existing restriction. Allow treeish expressions to be used in the case the notes tree is going to be used without write "permissions". Add a flag to distinguish whether the notes tree is intended to be used read-only, or will be updated. With this change, operations that use notes read-only can be fed any notes-shaped tree-ish can be used, e.g. git log --notes=notes@{1}. Signed-off-by: Mike Hommey Signed-off-by: Junio C Hamano --- Documentation/pretty-options.txt | 8 ++++---- builtin/notes.c | 29 ++++++++++++++++------------- notes-cache.c | 11 ++++++----- notes-utils.c | 6 +++--- notes.c | 11 +++++++---- notes.h | 10 +++++++++- t/t3301-notes.sh | 10 ++++++++++ 7 files changed, 55 insertions(+), 30 deletions(-) diff --git a/Documentation/pretty-options.txt b/Documentation/pretty-options.txt index 4b659ac1a..54b88b6dc 100644 --- a/Documentation/pretty-options.txt +++ b/Documentation/pretty-options.txt @@ -43,7 +43,7 @@ people using 80-column terminals. commit may be copied to the output. ifndef::git-rev-list[] ---notes[=]:: +--notes[=]:: Show the notes (see linkgit:git-notes[1]) that annotate the commit, when showing the commit log message. This is the default for `git log`, `git show` and `git whatchanged` commands when @@ -54,8 +54,8 @@ By default, the notes shown are from the notes refs listed in the 'core.notesRef' and 'notes.displayRef' variables (or corresponding environment overrides). See linkgit:git-config[1] for more details. + -With an optional '' argument, show this notes ref instead of the -default notes ref(s). The ref specifies the full refname when it begins +With an optional '' argument, use the treeish to find the notes +to display. The treeish can specify the full refname when it begins with `refs/notes/`; when it begins with `notes/`, `refs/` and otherwise `refs/notes/` is prefixed to form a full name of the ref. + @@ -71,7 +71,7 @@ being displayed. Examples: "--notes=foo" will show only notes from "--notes --notes=foo --no-notes --notes=bar" will only show notes from "refs/notes/bar". ---show-notes[=]:: +--show-notes[=]:: --[no-]standard-notes:: These options are deprecated. Use the above --notes/--no-notes options instead. diff --git a/builtin/notes.c b/builtin/notes.c index 52aa9af74..e1556896f 100644 --- a/builtin/notes.c +++ b/builtin/notes.c @@ -286,7 +286,7 @@ static int notes_copy_from_stdin(int force, const char *rewrite_cmd) if (!c) return 0; } else { - init_notes(NULL, NULL, NULL, 0); + init_notes(NULL, NULL, NULL, NOTES_INIT_WRITABLE); t = &default_notes_tree; } @@ -329,15 +329,18 @@ static int notes_copy_from_stdin(int force, const char *rewrite_cmd) return ret; } -static struct notes_tree *init_notes_check(const char *subcommand) +static struct notes_tree *init_notes_check(const char *subcommand, + int flags) { struct notes_tree *t; - init_notes(NULL, NULL, NULL, 0); + const char *ref; + init_notes(NULL, NULL, NULL, flags); t = &default_notes_tree; - if (!starts_with(t->ref, "refs/notes/")) + ref = (flags & NOTES_INIT_WRITABLE) ? t->update_ref : t->ref; + if (!starts_with(ref, "refs/notes/")) die("Refusing to %s notes in %s (outside of refs/notes/)", - subcommand, t->ref); + subcommand, ref); return t; } @@ -360,7 +363,7 @@ static int list(int argc, const char **argv, const char *prefix) usage_with_options(git_notes_list_usage, options); } - t = init_notes_check("list"); + t = init_notes_check("list", 0); if (argc) { if (get_sha1(argv[0], object)) die(_("Failed to resolve '%s' as a valid ref."), argv[0]); @@ -420,7 +423,7 @@ static int add(int argc, const char **argv, const char *prefix) if (get_sha1(object_ref, object)) die(_("Failed to resolve '%s' as a valid ref."), object_ref); - t = init_notes_check("add"); + t = init_notes_check("add", NOTES_INIT_WRITABLE); note = get_note(t, object); if (note) { @@ -511,7 +514,7 @@ static int copy(int argc, const char **argv, const char *prefix) if (get_sha1(object_ref, object)) die(_("Failed to resolve '%s' as a valid ref."), object_ref); - t = init_notes_check("copy"); + t = init_notes_check("copy", NOTES_INIT_WRITABLE); note = get_note(t, object); if (note) { @@ -589,7 +592,7 @@ static int append_edit(int argc, const char **argv, const char *prefix) if (get_sha1(object_ref, object)) die(_("Failed to resolve '%s' as a valid ref."), object_ref); - t = init_notes_check(argv[0]); + t = init_notes_check(argv[0], NOTES_INIT_WRITABLE); note = get_note(t, object); prepare_note_data(object, &d, edit ? note : NULL); @@ -652,7 +655,7 @@ static int show(int argc, const char **argv, const char *prefix) if (get_sha1(object_ref, object)) die(_("Failed to resolve '%s' as a valid ref."), object_ref); - t = init_notes_check("show"); + t = init_notes_check("show", 0); note = get_note(t, object); if (!note) @@ -809,7 +812,7 @@ static int merge(int argc, const char **argv, const char *prefix) expand_notes_ref(&remote_ref); o.remote_ref = remote_ref.buf; - t = init_notes_check("merge"); + t = init_notes_check("merge", NOTES_INIT_WRITABLE); if (strategy) { if (parse_notes_merge_strategy(strategy, &o.strategy)) { @@ -901,7 +904,7 @@ static int remove_cmd(int argc, const char **argv, const char *prefix) argc = parse_options(argc, argv, prefix, options, git_notes_remove_usage, 0); - t = init_notes_check("remove"); + t = init_notes_check("remove", NOTES_INIT_WRITABLE); if (!argc && !from_stdin) { retval = remove_one_note(t, "HEAD", flag); @@ -943,7 +946,7 @@ static int prune(int argc, const char **argv, const char *prefix) usage_with_options(git_notes_prune_usage, options); } - t = init_notes_check("prune"); + t = init_notes_check("prune", NOTES_INIT_WRITABLE); prune_notes(t, (verbose ? NOTES_PRUNE_VERBOSE : 0) | (show_only ? NOTES_PRUNE_VERBOSE|NOTES_PRUNE_DRYRUN : 0) ); diff --git a/notes-cache.c b/notes-cache.c index c4e9bb7f6..5dfc5cbd0 100644 --- a/notes-cache.c +++ b/notes-cache.c @@ -32,14 +32,14 @@ void notes_cache_init(struct notes_cache *c, const char *name, const char *validity) { struct strbuf ref = STRBUF_INIT; - int flags = 0; + int flags = NOTES_INIT_WRITABLE; memset(c, 0, sizeof(*c)); c->validity = xstrdup(validity); strbuf_addf(&ref, "refs/notes/%s", name); if (!notes_cache_match_validity(ref.buf, validity)) - flags = NOTES_INIT_EMPTY; + flags |= NOTES_INIT_EMPTY; init_notes(&c->tree, ref.buf, combine_notes_overwrite, flags); strbuf_release(&ref); } @@ -49,7 +49,8 @@ int notes_cache_write(struct notes_cache *c) unsigned char tree_sha1[20]; unsigned char commit_sha1[20]; - if (!c || !c->tree.initialized || !c->tree.ref || !*c->tree.ref) + if (!c || !c->tree.initialized || !c->tree.update_ref || + !*c->tree.update_ref) return -1; if (!c->tree.dirty) return 0; @@ -59,8 +60,8 @@ int notes_cache_write(struct notes_cache *c) if (commit_tree(c->validity, strlen(c->validity), tree_sha1, NULL, commit_sha1, NULL, NULL) < 0) return -1; - if (update_ref("update notes cache", c->tree.ref, commit_sha1, NULL, - 0, UPDATE_REFS_QUIET_ON_ERR) < 0) + if (update_ref("update notes cache", c->tree.update_ref, commit_sha1, + NULL, 0, UPDATE_REFS_QUIET_ON_ERR) < 0) return -1; return 0; diff --git a/notes-utils.c b/notes-utils.c index 299e34bcc..24a33616a 100644 --- a/notes-utils.c +++ b/notes-utils.c @@ -37,7 +37,7 @@ void commit_notes(struct notes_tree *t, const char *msg) if (!t) t = &default_notes_tree; - if (!t->initialized || !t->ref || !*t->ref) + if (!t->initialized || !t->update_ref || !*t->update_ref) die(_("Cannot commit uninitialized/unreferenced notes tree")); if (!t->dirty) return; /* don't have to commit an unchanged tree */ @@ -48,7 +48,7 @@ void commit_notes(struct notes_tree *t, const char *msg) create_notes_commit(t, NULL, buf.buf, buf.len, commit_sha1); strbuf_insert(&buf, 0, "notes: ", 7); /* commit message starts at index 7 */ - update_ref(buf.buf, t->ref, commit_sha1, NULL, 0, + update_ref(buf.buf, t->update_ref, commit_sha1, NULL, 0, UPDATE_REFS_DIE_ON_ERR); strbuf_release(&buf); @@ -148,7 +148,7 @@ struct notes_rewrite_cfg *init_copy_notes_for_rewrite(const char *cmd) free(c); return NULL; } - c->trees = load_notes_trees(c->refs); + c->trees = load_notes_trees(c->refs, NOTES_INIT_WRITABLE); string_list_clear(c->refs, 0); free(c->refs); return c; diff --git a/notes.c b/notes.c index db7792213..358e2fdb7 100644 --- a/notes.c +++ b/notes.c @@ -1011,13 +1011,16 @@ void init_notes(struct notes_tree *t, const char *notes_ref, t->first_non_note = NULL; t->prev_non_note = NULL; t->ref = xstrdup_or_null(notes_ref); + t->update_ref = (flags & NOTES_INIT_WRITABLE) ? t->ref : NULL; t->combine_notes = combine_notes; t->initialized = 1; t->dirty = 0; if (flags & NOTES_INIT_EMPTY || !notes_ref || - read_ref(notes_ref, object_sha1)) + get_sha1_treeish(notes_ref, object_sha1)) return; + if (flags & NOTES_INIT_WRITABLE && read_ref(notes_ref, object_sha1)) + die("Cannot use notes ref %s", notes_ref); if (get_tree_entry(object_sha1, "", sha1, &mode)) die("Failed to read notes tree referenced by %s (%s)", notes_ref, sha1_to_hex(object_sha1)); @@ -1027,7 +1030,7 @@ void init_notes(struct notes_tree *t, const char *notes_ref, load_subtree(t, &root_tree, t->root, 0); } -struct notes_tree **load_notes_trees(struct string_list *refs) +struct notes_tree **load_notes_trees(struct string_list *refs, int flags) { struct string_list_item *item; int counter = 0; @@ -1035,7 +1038,7 @@ struct notes_tree **load_notes_trees(struct string_list *refs) trees = xmalloc((refs->nr+1) * sizeof(struct notes_tree *)); for_each_string_list_item(item, refs) { struct notes_tree *t = xcalloc(1, sizeof(struct notes_tree)); - init_notes(t, item->string, combine_notes_ignore, 0); + init_notes(t, item->string, combine_notes_ignore, flags); trees[counter++] = t; } trees[counter] = NULL; @@ -1071,7 +1074,7 @@ void init_display_notes(struct display_notes_opt *opt) item->string); } - display_notes_trees = load_notes_trees(&display_notes_refs); + display_notes_trees = load_notes_trees(&display_notes_refs, 0); string_list_clear(&display_notes_refs, 0); } diff --git a/notes.h b/notes.h index 2a3f92338..e5d67fd37 100644 --- a/notes.h +++ b/notes.h @@ -44,6 +44,7 @@ extern struct notes_tree { struct int_node *root; struct non_note *first_non_note, *prev_non_note; char *ref; + char *update_ref; combine_notes_fn combine_notes; int initialized; int dirty; @@ -71,6 +72,13 @@ const char *default_notes_ref(void); */ #define NOTES_INIT_EMPTY 1 +/* + * By default, the notes tree is only readable, and the notes ref can be + * any treeish. The notes tree can however be made writable with this flag, + * in which case only strict ref names can be used. + */ +#define NOTES_INIT_WRITABLE 2 + /* * Initialize the given notes_tree with the notes tree structure at the given * ref. If given ref is NULL, the value of the $GIT_NOTES_REF environment @@ -276,7 +284,7 @@ void format_display_notes(const unsigned char *object_sha1, * Load the notes tree from each ref listed in 'refs'. The output is * an array of notes_tree*, terminated by a NULL. */ -struct notes_tree **load_notes_trees(struct string_list *refs); +struct notes_tree **load_notes_trees(struct string_list *refs, int flags); /* * Add all refs that match 'glob' to the 'list'. diff --git a/t/t3301-notes.sh b/t/t3301-notes.sh index cd70274ea..2d200fdf3 100755 --- a/t/t3301-notes.sh +++ b/t/t3301-notes.sh @@ -83,6 +83,16 @@ test_expect_success 'edit existing notes' ' test_must_fail git notes show HEAD^ ' +test_expect_success 'show notes from treeish' ' + test "b3" = "$(git notes --ref commits^{tree} show)" && + test "b4" = "$(git notes --ref commits@{1} show)" +' + +test_expect_success 'cannot edit notes from non-ref' ' + test_must_fail git notes --ref commits^{tree} edit && + test_must_fail git notes --ref commits@{1} edit +' + test_expect_success 'cannot "git notes add -m" where notes already exists' ' test_must_fail git notes add -m "b2" && test_path_is_missing .git/NOTES_EDITMSG &&