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authorKarthik Nayak <karthik.188@gmail.com>2015-09-11 15:06:16 (GMT)
committerJunio C Hamano <gitster@pobox.com>2015-09-17 17:02:49 (GMT)
commitb7cc53e92c806b73e14b03f60c17b7c29e52b4a4 (patch)
tree476b544dc35d3eea557665aec0db22d1d7b75778 /builtin/tag.c
parentac4cc866c8cddbc25b5f213286a0269318dd2485 (diff)
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tag.c: use 'ref-filter' APIs
Make 'tag.c' use 'ref-filter' APIs for iterating through refs, sorting and printing of refs. This removes most of the code used in 'tag.c' replacing it with calls to the 'ref-filter' library. Make 'tag.c' use the 'filter_refs()' function provided by 'ref-filter' to filter out tags based on the options set. For printing tags we use 'show_ref_array_item()' function provided by 'ref-filter'. We improve the sorting option provided by 'tag.c' by using the sorting options provided by 'ref-filter'. This causes the test 'invalid sort parameter on command line' in t7004 to fail, as 'ref-filter' throws an error for all sorting fields which are incorrect. The test is changed to reflect the same. Modify documentation for the same. Mentored-by: Christian Couder <christian.couder@gmail.com> Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr> Signed-off-by: Karthik Nayak <karthik.188@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/tag.c')
-rw-r--r--builtin/tag.c345
1 files changed, 43 insertions, 302 deletions
diff --git a/builtin/tag.c b/builtin/tag.c
index fe66f7b..977a18c 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -28,278 +28,35 @@ static const char * const git_tag_usage[] = {
NULL
};
-#define STRCMP_SORT 0 /* must be zero */
-#define VERCMP_SORT 1
-#define SORT_MASK 0x7fff
-#define REVERSE_SORT 0x8000
-
-static int tag_sort;
-
static unsigned int colopts;
-static int match_pattern(const char **patterns, const char *ref)
-{
- /* no pattern means match everything */
- if (!*patterns)
- return 1;
- for (; *patterns; patterns++)
- if (!wildmatch(*patterns, ref, 0, NULL))
- return 1;
- return 0;
-}
-
-/*
- * This is currently duplicated in ref-filter.c, and will eventually be
- * removed as we port tag.c to use the ref-filter APIs.
- */
-static const unsigned char *match_points_at(const char *refname,
- const unsigned char *sha1,
- struct sha1_array *points_at)
-{
- const unsigned char *tagged_sha1 = NULL;
- struct object *obj;
-
- if (sha1_array_lookup(points_at, sha1) >= 0)
- return sha1;
- obj = parse_object(sha1);
- if (!obj)
- die(_("malformed object at '%s'"), refname);
- if (obj->type == OBJ_TAG)
- tagged_sha1 = ((struct tag *)obj)->tagged->sha1;
- if (tagged_sha1 && sha1_array_lookup(points_at, tagged_sha1) >= 0)
- return tagged_sha1;
- return NULL;
-}
-
-static int in_commit_list(const struct commit_list *want, struct commit *c)
-{
- for (; want; want = want->next)
- if (!hashcmp(want->item->object.sha1, c->object.sha1))
- return 1;
- return 0;
-}
-
-/*
- * The entire code segment for supporting the --contains option has been
- * copied over to ref-filter.{c,h}. This will be deleted evetually when
- * we port tag.c to use ref-filter APIs.
- */
-enum contains_result {
- CONTAINS_UNKNOWN = -1,
- CONTAINS_NO = 0,
- CONTAINS_YES = 1
-};
-
-/*
- * Test whether the candidate or one of its parents is contained in the list.
- * Do not recurse to find out, though, but return -1 if inconclusive.
- */
-static enum contains_result contains_test(struct commit *candidate,
- const struct commit_list *want)
-{
- /* was it previously marked as containing a want commit? */
- if (candidate->object.flags & TMP_MARK)
- return 1;
- /* or marked as not possibly containing a want commit? */
- if (candidate->object.flags & UNINTERESTING)
- return 0;
- /* or are we it? */
- if (in_commit_list(want, candidate)) {
- candidate->object.flags |= TMP_MARK;
- return 1;
- }
-
- if (parse_commit(candidate) < 0)
- return 0;
-
- return -1;
-}
-
-/*
- * Mimicking the real stack, this stack lives on the heap, avoiding stack
- * overflows.
- *
- * At each recursion step, the stack items points to the commits whose
- * ancestors are to be inspected.
- */
-struct stack {
- int nr, alloc;
- struct stack_entry {
- struct commit *commit;
- struct commit_list *parents;
- } *stack;
-};
-
-static void push_to_stack(struct commit *candidate, struct stack *stack)
-{
- int index = stack->nr++;
- ALLOC_GROW(stack->stack, stack->nr, stack->alloc);
- stack->stack[index].commit = candidate;
- stack->stack[index].parents = candidate->parents;
-}
-
-static enum contains_result contains(struct commit *candidate,
- const struct commit_list *want)
-{
- struct stack stack = { 0, 0, NULL };
- int result = contains_test(candidate, want);
-
- if (result != CONTAINS_UNKNOWN)
- return result;
-
- push_to_stack(candidate, &stack);
- while (stack.nr) {
- struct stack_entry *entry = &stack.stack[stack.nr - 1];
- struct commit *commit = entry->commit;
- struct commit_list *parents = entry->parents;
-
- if (!parents) {
- commit->object.flags |= UNINTERESTING;
- stack.nr--;
- }
- /*
- * If we just popped the stack, parents->item has been marked,
- * therefore contains_test will return a meaningful 0 or 1.
- */
- else switch (contains_test(parents->item, want)) {
- case CONTAINS_YES:
- commit->object.flags |= TMP_MARK;
- stack.nr--;
- break;
- case CONTAINS_NO:
- entry->parents = parents->next;
- break;
- case CONTAINS_UNKNOWN:
- push_to_stack(parents->item, &stack);
- break;
- }
- }
- free(stack.stack);
- return contains_test(candidate, want);
-}
-
-/*
- * Currently modified and used in ref-filter as append_lines(), will
- * eventually be removed as we port tag.c to use ref-filter APIs.
- */
-static void show_tag_lines(const struct object_id *oid, int lines)
-{
- int i;
- unsigned long size;
- enum object_type type;
- char *buf, *sp, *eol;
- size_t len;
-
- buf = read_sha1_file(oid->hash, &type, &size);
- if (!buf)
- die_errno("unable to read object %s", oid_to_hex(oid));
- if (type != OBJ_COMMIT && type != OBJ_TAG)
- goto free_return;
- if (!size)
- die("an empty %s object %s?",
- typename(type), oid_to_hex(oid));
-
- /* skip header */
- sp = strstr(buf, "\n\n");
- if (!sp)
- goto free_return;
-
- /* only take up to "lines" lines, and strip the signature from a tag */
- if (type == OBJ_TAG)
- size = parse_signature(buf, size);
- for (i = 0, sp += 2; i < lines && sp < buf + size; i++) {
- if (i)
- printf("\n ");
- eol = memchr(sp, '\n', size - (sp - buf));
- len = eol ? eol - sp : size - (sp - buf);
- fwrite(sp, len, 1, stdout);
- if (!eol)
- break;
- sp = eol + 1;
- }
-free_return:
- free(buf);
-}
-
-static void ref_array_append(struct ref_array *array, const char *refname)
-{
- size_t len = strlen(refname);
- struct ref_array_item *ref = xcalloc(1, sizeof(struct ref_array_item) + len + 1);
- memcpy(ref->refname, refname, len);
- ref->refname[len] = '\0';
- REALLOC_ARRAY(array->items, array->nr + 1);
- array->items[array->nr++] = ref;
-}
-
-static int show_reference(const char *refname, const struct object_id *oid,
- int flag, void *cb_data)
-{
- struct ref_filter_cbdata *data = cb_data;
- struct ref_array *array = data->array;
- struct ref_filter *filter = data->filter;
-
- if (match_pattern(filter->name_patterns, refname)) {
- if (filter->with_commit) {
- struct commit *commit;
-
- commit = lookup_commit_reference_gently(oid->hash, 1);
- if (!commit)
- return 0;
- if (!contains(commit, filter->with_commit))
- return 0;
- }
-
- if (filter->points_at.nr && !match_points_at(refname, oid->hash, &filter->points_at))
- return 0;
-
- if (!filter->lines) {
- if (tag_sort)
- ref_array_append(array, refname);
- else
- printf("%s\n", refname);
- return 0;
- }
- printf("%-15s ", refname);
- show_tag_lines(oid, filter->lines);
- putchar('\n');
- }
-
- return 0;
-}
-
-static int sort_by_version(const void *a_, const void *b_)
-{
- const struct ref_array_item *a = *((struct ref_array_item **)a_);
- const struct ref_array_item *b = *((struct ref_array_item **)b_);
- return versioncmp(a->refname, b->refname);
-}
-
-static int list_tags(struct ref_filter *filter, int sort)
+static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting)
{
struct ref_array array;
- struct ref_filter_cbdata data;
+ char *format, *to_free = NULL;
+ int i;
memset(&array, 0, sizeof(array));
- data.array = &array;
- data.filter = filter;
if (filter->lines == -1)
filter->lines = 0;
- for_each_tag_ref(show_reference, &data);
- if (sort) {
- int i;
- if ((sort & SORT_MASK) == VERCMP_SORT)
- qsort(array.items, array.nr,
- sizeof(struct ref_array_item *), sort_by_version);
- if (sort & REVERSE_SORT)
- for (i = array.nr - 1; i >= 0; i--)
- printf("%s\n", array.items[i]->refname);
- else
- for (i = 0; i < array.nr; i++)
- printf("%s\n", array.items[i]->refname);
- ref_array_clear(&array);
- }
+ if (filter->lines) {
+ to_free = xstrfmt("%s %%(contents:lines=%d)",
+ "%(align:15)%(refname:short)%(end)", filter->lines);
+ format = to_free;
+ } else
+ format = "%(refname:short)";
+
+ verify_ref_format(format);
+ filter_refs(&array, filter, FILTER_REFS_TAGS);
+ ref_array_sort(sorting, &array);
+
+ for (i = 0; i < array.nr; i++)
+ show_ref_array_item(array.items[i], format, 0);
+ ref_array_clear(&array);
+ free(to_free);
+
return 0;
}
@@ -366,35 +123,26 @@ static const char tag_template_nocleanup[] =
"Lines starting with '%c' will be kept; you may remove them"
" yourself if you want to.\n");
-/*
- * Parse a sort string, and return 0 if parsed successfully. Will return
- * non-zero when the sort string does not parse into a known type. If var is
- * given, the error message becomes a warning and includes information about
- * the configuration value.
- */
-static int parse_sort_string(const char *var, const char *arg, int *sort)
+/* Parse arg given and add it the ref_sorting array */
+static int parse_sorting_string(const char *arg, struct ref_sorting **sorting_tail)
{
- int type = 0, flags = 0;
-
- if (skip_prefix(arg, "-", &arg))
- flags |= REVERSE_SORT;
+ struct ref_sorting *s;
+ int len;
- if (skip_prefix(arg, "version:", &arg) || skip_prefix(arg, "v:", &arg))
- type = VERCMP_SORT;
- else
- type = STRCMP_SORT;
+ s = xcalloc(1, sizeof(*s));
+ s->next = *sorting_tail;
+ *sorting_tail = s;
- if (strcmp(arg, "refname")) {
- if (!var)
- return error(_("unsupported sort specification '%s'"), arg);
- else {
- warning(_("unsupported sort specification '%s' in variable '%s'"),
- var, arg);
- return -1;
- }
+ if (*arg == '-') {
+ s->reverse = 1;
+ arg++;
}
+ if (skip_prefix(arg, "version:", &arg) ||
+ skip_prefix(arg, "v:", &arg))
+ s->version = 1;
- *sort = (type | flags);
+ len = strlen(arg);
+ s->atom = parse_ref_filter_atom(arg, arg+len);
return 0;
}
@@ -402,11 +150,12 @@ static int parse_sort_string(const char *var, const char *arg, int *sort)
static int git_tag_config(const char *var, const char *value, void *cb)
{
int status;
+ struct ref_sorting **sorting_tail = (struct ref_sorting **)cb;
if (!strcmp(var, "tag.sort")) {
if (!value)
return config_error_nonbool(var);
- parse_sort_string(var, value, &tag_sort);
+ parse_sorting_string(value, sorting_tail);
return 0;
}
@@ -564,13 +313,6 @@ static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
return check_refname_format(sb->buf, 0);
}
-static int parse_opt_sort(const struct option *opt, const char *arg, int unset)
-{
- int *sort = opt->value;
-
- return parse_sort_string(NULL, arg, sort);
-}
-
int cmd_tag(int argc, const char **argv, const char *prefix)
{
struct strbuf buf = STRBUF_INIT;
@@ -587,6 +329,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
struct ref_filter filter;
+ static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
struct option options[] = {
OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
{ OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
@@ -613,10 +356,8 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
- {
- OPTION_CALLBACK, 0, "sort", &tag_sort, N_("type"), N_("sort tags"),
- PARSE_OPT_NONEG, parse_opt_sort
- },
+ OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
+ N_("field name to sort on"), &parse_opt_ref_sorting),
{
OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
N_("print only tags of the object"), 0, parse_opt_object_name
@@ -624,7 +365,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
OPT_END()
};
- git_config(git_tag_config, NULL);
+ git_config(git_tag_config, sorting_tail);
memset(&opt, 0, sizeof(opt));
memset(&filter, 0, sizeof(filter));
@@ -650,6 +391,8 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
die(_("--column and -n are incompatible"));
colopts = 0;
}
+ if (!sorting)
+ sorting = ref_default_sorting();
if (cmdmode == 'l') {
int ret;
if (column_active(colopts)) {
@@ -658,10 +401,8 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
copts.padding = 2;
run_column_filter(colopts, &copts);
}
- if (filter.lines != -1 && tag_sort)
- die(_("--sort and -n are incompatible"));
filter.name_patterns = argv;
- ret = list_tags(&filter, tag_sort);
+ ret = list_tags(&filter, sorting);
if (column_active(colopts))
stop_column_filter();
return ret;