mirror of
https://github.com/git/git
synced 2024-08-25 02:35:46 +00:00
![Andrzej Hunt](/assets/img/avatar_default.png)
origin starts off pointing to somewhere within line, which is owned by the caller. Later we might allocate a new string using xmemdupz() or xstrfmt(). To avoid leaking these new strings, we introduce a to_free pointer - which allows us to safely free the newly allocated string when we're done (we cannot just free origin directly as it might still be pointing to line). LSAN output from t0090: Direct leak of 8 byte(s) in 1 object(s) allocated from: #0 0x49a82d in malloc ../projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:145:3 #1 0xa71f49 in do_xmalloc wrapper.c:41:8 #2 0xa720b0 in do_xmallocz wrapper.c:75:8 #3 0xa720b0 in xmallocz wrapper.c:83:9 #4 0xa720b0 in xmemdupz wrapper.c:99:16 #5 0x8092ba in handle_line fmt-merge-msg.c:187:23 #6 0x8092ba in fmt_merge_msg fmt-merge-msg.c:666:7 #7 0x5ce2e6 in prepare_merge_message builtin/merge.c:1119:2 #8 0x5ce2e6 in collect_parents builtin/merge.c:1215:3 #9 0x5c9c1e in cmd_merge builtin/merge.c:1454:16 #10 0x4ce83e in run_builtin git.c:475:11 #11 0x4ccafe in handle_builtin git.c:729:3 #12 0x4cb01c in run_argv git.c:818:4 #13 0x4cb01c in cmd_main git.c:949:19 #14 0x6b3fad in main common-main.c:52:11 #15 0x7fb929620349 in __libc_start_main (/lib64/libc.so.6+0x24349) SUMMARY: AddressSanitizer: 8 byte(s) leaked in 1 allocation(s). Signed-off-by: Andrzej Hunt <andrzej@ahunt.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
699 lines
18 KiB
C
699 lines
18 KiB
C
#include "config.h"
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#include "refs.h"
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#include "object-store.h"
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#include "diff.h"
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#include "diff-merges.h"
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#include "revision.h"
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#include "tag.h"
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#include "string-list.h"
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#include "branch.h"
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#include "fmt-merge-msg.h"
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#include "commit-reach.h"
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static int use_branch_desc;
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static int suppress_dest_pattern_seen;
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static struct string_list suppress_dest_patterns = STRING_LIST_INIT_DUP;
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int fmt_merge_msg_config(const char *key, const char *value, void *cb)
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{
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if (!strcmp(key, "merge.log") || !strcmp(key, "merge.summary")) {
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int is_bool;
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merge_log_config = git_config_bool_or_int(key, value, &is_bool);
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if (!is_bool && merge_log_config < 0)
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return error("%s: negative length %s", key, value);
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if (is_bool && merge_log_config)
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merge_log_config = DEFAULT_MERGE_LOG_LEN;
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} else if (!strcmp(key, "merge.branchdesc")) {
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use_branch_desc = git_config_bool(key, value);
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} else if (!strcmp(key, "merge.suppressdest")) {
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if (!value)
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return config_error_nonbool(key);
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if (!*value)
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string_list_clear(&suppress_dest_patterns, 0);
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else
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string_list_append(&suppress_dest_patterns, value);
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suppress_dest_pattern_seen = 1;
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} else {
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return git_default_config(key, value, cb);
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}
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return 0;
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}
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/* merge data per repository where the merged tips came from */
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struct src_data {
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struct string_list branch, tag, r_branch, generic;
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int head_status;
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};
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struct origin_data {
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struct object_id oid;
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unsigned is_local_branch:1;
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};
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static void init_src_data(struct src_data *data)
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{
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data->branch.strdup_strings = 1;
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data->tag.strdup_strings = 1;
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data->r_branch.strdup_strings = 1;
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data->generic.strdup_strings = 1;
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}
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static struct string_list srcs = STRING_LIST_INIT_DUP;
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static struct string_list origins = STRING_LIST_INIT_DUP;
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struct merge_parents {
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int alloc, nr;
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struct merge_parent {
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struct object_id given;
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struct object_id commit;
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unsigned char used;
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} *item;
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};
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/*
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* I know, I know, this is inefficient, but you won't be pulling and merging
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* hundreds of heads at a time anyway.
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*/
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static struct merge_parent *find_merge_parent(struct merge_parents *table,
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struct object_id *given,
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struct object_id *commit)
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{
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int i;
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for (i = 0; i < table->nr; i++) {
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if (given && !oideq(&table->item[i].given, given))
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continue;
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if (commit && !oideq(&table->item[i].commit, commit))
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continue;
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return &table->item[i];
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}
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return NULL;
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}
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static void add_merge_parent(struct merge_parents *table,
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struct object_id *given,
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struct object_id *commit)
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{
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if (table->nr && find_merge_parent(table, given, commit))
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return;
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ALLOC_GROW(table->item, table->nr + 1, table->alloc);
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oidcpy(&table->item[table->nr].given, given);
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oidcpy(&table->item[table->nr].commit, commit);
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table->item[table->nr].used = 0;
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table->nr++;
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}
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static int handle_line(char *line, struct merge_parents *merge_parents)
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{
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int i, len = strlen(line);
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struct origin_data *origin_data;
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char *src;
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const char *origin, *tag_name;
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char *to_free = NULL;
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struct src_data *src_data;
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struct string_list_item *item;
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int pulling_head = 0;
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struct object_id oid;
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const unsigned hexsz = the_hash_algo->hexsz;
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if (len < hexsz + 3 || line[hexsz] != '\t')
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return 1;
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if (starts_with(line + hexsz + 1, "not-for-merge"))
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return 0;
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if (line[hexsz + 1] != '\t')
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return 2;
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i = get_oid_hex(line, &oid);
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if (i)
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return 3;
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if (!find_merge_parent(merge_parents, &oid, NULL))
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return 0; /* subsumed by other parents */
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CALLOC_ARRAY(origin_data, 1);
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oidcpy(&origin_data->oid, &oid);
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if (line[len - 1] == '\n')
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line[len - 1] = 0;
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line += hexsz + 2;
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/*
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* At this point, line points at the beginning of comment e.g.
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* "branch 'frotz' of git://that/repository.git".
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* Find the repository name and point it with src.
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*/
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src = strstr(line, " of ");
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if (src) {
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*src = 0;
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src += 4;
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pulling_head = 0;
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} else {
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src = line;
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pulling_head = 1;
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}
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item = unsorted_string_list_lookup(&srcs, src);
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if (!item) {
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item = string_list_append(&srcs, src);
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item->util = xcalloc(1, sizeof(struct src_data));
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init_src_data(item->util);
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}
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src_data = item->util;
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if (pulling_head) {
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origin = src;
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src_data->head_status |= 1;
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} else if (skip_prefix(line, "branch ", &origin)) {
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origin_data->is_local_branch = 1;
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string_list_append(&src_data->branch, origin);
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src_data->head_status |= 2;
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} else if (skip_prefix(line, "tag ", &tag_name)) {
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origin = line;
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string_list_append(&src_data->tag, tag_name);
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src_data->head_status |= 2;
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} else if (skip_prefix(line, "remote-tracking branch ", &origin)) {
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string_list_append(&src_data->r_branch, origin);
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src_data->head_status |= 2;
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} else {
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origin = src;
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string_list_append(&src_data->generic, line);
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src_data->head_status |= 2;
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}
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if (!strcmp(".", src) || !strcmp(src, origin)) {
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int len = strlen(origin);
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if (origin[0] == '\'' && origin[len - 1] == '\'')
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origin = to_free = xmemdupz(origin + 1, len - 2);
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} else
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origin = to_free = xstrfmt("%s of %s", origin, src);
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if (strcmp(".", src))
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origin_data->is_local_branch = 0;
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string_list_append(&origins, origin)->util = origin_data;
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free(to_free);
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return 0;
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}
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static void print_joined(const char *singular, const char *plural,
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struct string_list *list, struct strbuf *out)
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{
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if (list->nr == 0)
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return;
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if (list->nr == 1) {
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strbuf_addf(out, "%s%s", singular, list->items[0].string);
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} else {
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int i;
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strbuf_addstr(out, plural);
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for (i = 0; i < list->nr - 1; i++)
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strbuf_addf(out, "%s%s", i > 0 ? ", " : "",
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list->items[i].string);
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strbuf_addf(out, " and %s", list->items[list->nr - 1].string);
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}
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}
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static void add_branch_desc(struct strbuf *out, const char *name)
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{
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struct strbuf desc = STRBUF_INIT;
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if (!read_branch_desc(&desc, name)) {
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const char *bp = desc.buf;
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while (*bp) {
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const char *ep = strchrnul(bp, '\n');
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if (*ep)
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ep++;
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strbuf_addf(out, " : %.*s", (int)(ep - bp), bp);
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bp = ep;
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}
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strbuf_complete_line(out);
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}
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strbuf_release(&desc);
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}
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#define util_as_integral(elem) ((intptr_t)((elem)->util))
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static void record_person_from_buf(int which, struct string_list *people,
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const char *buffer)
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{
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char *name_buf, *name, *name_end;
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struct string_list_item *elem;
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const char *field;
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field = (which == 'a') ? "\nauthor " : "\ncommitter ";
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name = strstr(buffer, field);
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if (!name)
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return;
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name += strlen(field);
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name_end = strchrnul(name, '<');
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if (*name_end)
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name_end--;
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while (isspace(*name_end) && name <= name_end)
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name_end--;
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if (name_end < name)
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return;
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name_buf = xmemdupz(name, name_end - name + 1);
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elem = string_list_lookup(people, name_buf);
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if (!elem) {
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elem = string_list_insert(people, name_buf);
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elem->util = (void *)0;
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}
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elem->util = (void*)(util_as_integral(elem) + 1);
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free(name_buf);
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}
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static void record_person(int which, struct string_list *people,
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struct commit *commit)
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{
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const char *buffer = get_commit_buffer(commit, NULL);
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record_person_from_buf(which, people, buffer);
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unuse_commit_buffer(commit, buffer);
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}
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static int cmp_string_list_util_as_integral(const void *a_, const void *b_)
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{
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const struct string_list_item *a = a_, *b = b_;
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return util_as_integral(b) - util_as_integral(a);
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}
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static void add_people_count(struct strbuf *out, struct string_list *people)
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{
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if (people->nr == 1)
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strbuf_addstr(out, people->items[0].string);
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else if (people->nr == 2)
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strbuf_addf(out, "%s (%d) and %s (%d)",
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people->items[0].string,
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(int)util_as_integral(&people->items[0]),
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people->items[1].string,
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(int)util_as_integral(&people->items[1]));
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else if (people->nr)
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strbuf_addf(out, "%s (%d) and others",
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people->items[0].string,
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(int)util_as_integral(&people->items[0]));
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}
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static void credit_people(struct strbuf *out,
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struct string_list *them,
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int kind)
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{
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const char *label;
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const char *me;
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if (kind == 'a') {
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label = "By";
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me = git_author_info(IDENT_NO_DATE);
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} else {
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label = "Via";
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me = git_committer_info(IDENT_NO_DATE);
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}
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if (!them->nr ||
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(them->nr == 1 &&
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me &&
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skip_prefix(me, them->items->string, &me) &&
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starts_with(me, " <")))
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return;
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strbuf_addf(out, "\n%c %s ", comment_line_char, label);
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add_people_count(out, them);
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}
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static void add_people_info(struct strbuf *out,
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struct string_list *authors,
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struct string_list *committers)
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{
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QSORT(authors->items, authors->nr,
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cmp_string_list_util_as_integral);
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QSORT(committers->items, committers->nr,
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cmp_string_list_util_as_integral);
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credit_people(out, authors, 'a');
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credit_people(out, committers, 'c');
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}
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static void shortlog(const char *name,
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struct origin_data *origin_data,
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struct commit *head,
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struct rev_info *rev,
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struct fmt_merge_msg_opts *opts,
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struct strbuf *out)
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{
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int i, count = 0;
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struct commit *commit;
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struct object *branch;
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struct string_list subjects = STRING_LIST_INIT_DUP;
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struct string_list authors = STRING_LIST_INIT_DUP;
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struct string_list committers = STRING_LIST_INIT_DUP;
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int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED;
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struct strbuf sb = STRBUF_INIT;
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const struct object_id *oid = &origin_data->oid;
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int limit = opts->shortlog_len;
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branch = deref_tag(the_repository, parse_object(the_repository, oid),
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oid_to_hex(oid),
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the_hash_algo->hexsz);
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if (!branch || branch->type != OBJ_COMMIT)
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return;
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setup_revisions(0, NULL, rev, NULL);
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add_pending_object(rev, branch, name);
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add_pending_object(rev, &head->object, "^HEAD");
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head->object.flags |= UNINTERESTING;
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if (prepare_revision_walk(rev))
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die("revision walk setup failed");
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while ((commit = get_revision(rev)) != NULL) {
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struct pretty_print_context ctx = {0};
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if (commit->parents && commit->parents->next) {
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/* do not list a merge but count committer */
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if (opts->credit_people)
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record_person('c', &committers, commit);
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continue;
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}
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if (!count && opts->credit_people)
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/* the 'tip' committer */
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record_person('c', &committers, commit);
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if (opts->credit_people)
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record_person('a', &authors, commit);
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count++;
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if (subjects.nr > limit)
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continue;
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format_commit_message(commit, "%s", &sb, &ctx);
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strbuf_ltrim(&sb);
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if (!sb.len)
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string_list_append(&subjects,
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oid_to_hex(&commit->object.oid));
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else
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string_list_append_nodup(&subjects,
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strbuf_detach(&sb, NULL));
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}
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if (opts->credit_people)
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add_people_info(out, &authors, &committers);
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if (count > limit)
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strbuf_addf(out, "\n* %s: (%d commits)\n", name, count);
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else
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strbuf_addf(out, "\n* %s:\n", name);
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if (origin_data->is_local_branch && use_branch_desc)
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add_branch_desc(out, name);
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for (i = 0; i < subjects.nr; i++)
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if (i >= limit)
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strbuf_addstr(out, " ...\n");
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else
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strbuf_addf(out, " %s\n", subjects.items[i].string);
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clear_commit_marks((struct commit *)branch, flags);
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clear_commit_marks(head, flags);
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free_commit_list(rev->commits);
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rev->commits = NULL;
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rev->pending.nr = 0;
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string_list_clear(&authors, 0);
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string_list_clear(&committers, 0);
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string_list_clear(&subjects, 0);
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}
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/*
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* See if dest_branch matches with any glob pattern on the
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* suppress_dest_patterns list.
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*
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* We may want to also allow negative matches e.g. ":!glob" like we do
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* for pathspec, but for now, let's keep it simple and stupid.
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*/
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static int dest_suppressed(const char *dest_branch)
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{
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struct string_list_item *item;
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for_each_string_list_item(item, &suppress_dest_patterns) {
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if (!wildmatch(item->string, dest_branch, WM_PATHNAME))
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return 1;
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}
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return 0;
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}
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static void fmt_merge_msg_title(struct strbuf *out,
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const char *current_branch)
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{
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int i = 0;
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char *sep = "";
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strbuf_addstr(out, "Merge ");
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for (i = 0; i < srcs.nr; i++) {
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struct src_data *src_data = srcs.items[i].util;
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const char *subsep = "";
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strbuf_addstr(out, sep);
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sep = "; ";
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if (src_data->head_status == 1) {
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strbuf_addstr(out, srcs.items[i].string);
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continue;
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}
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if (src_data->head_status == 3) {
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subsep = ", ";
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strbuf_addstr(out, "HEAD");
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}
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if (src_data->branch.nr) {
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strbuf_addstr(out, subsep);
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subsep = ", ";
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print_joined("branch ", "branches ", &src_data->branch,
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out);
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}
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if (src_data->r_branch.nr) {
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strbuf_addstr(out, subsep);
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subsep = ", ";
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print_joined("remote-tracking branch ", "remote-tracking branches ",
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&src_data->r_branch, out);
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}
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if (src_data->tag.nr) {
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strbuf_addstr(out, subsep);
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subsep = ", ";
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print_joined("tag ", "tags ", &src_data->tag, out);
|
|
}
|
|
if (src_data->generic.nr) {
|
|
strbuf_addstr(out, subsep);
|
|
print_joined("commit ", "commits ", &src_data->generic,
|
|
out);
|
|
}
|
|
if (strcmp(".", srcs.items[i].string))
|
|
strbuf_addf(out, " of %s", srcs.items[i].string);
|
|
}
|
|
|
|
if (!dest_suppressed(current_branch))
|
|
strbuf_addf(out, " into %s", current_branch);
|
|
strbuf_addch(out, '\n');
|
|
}
|
|
|
|
static void fmt_tag_signature(struct strbuf *tagbuf,
|
|
struct strbuf *sig,
|
|
const char *buf,
|
|
unsigned long len)
|
|
{
|
|
const char *tag_body = strstr(buf, "\n\n");
|
|
if (tag_body) {
|
|
tag_body += 2;
|
|
strbuf_add(tagbuf, tag_body, buf + len - tag_body);
|
|
}
|
|
strbuf_complete_line(tagbuf);
|
|
if (sig->len) {
|
|
strbuf_addch(tagbuf, '\n');
|
|
strbuf_add_commented_lines(tagbuf, sig->buf, sig->len);
|
|
}
|
|
}
|
|
|
|
static void fmt_merge_msg_sigs(struct strbuf *out)
|
|
{
|
|
int i, tag_number = 0, first_tag = 0;
|
|
struct strbuf tagbuf = STRBUF_INIT;
|
|
|
|
for (i = 0; i < origins.nr; i++) {
|
|
struct object_id *oid = origins.items[i].util;
|
|
enum object_type type;
|
|
unsigned long size;
|
|
char *buf = read_object_file(oid, &type, &size);
|
|
char *origbuf = buf;
|
|
unsigned long len = size;
|
|
struct signature_check sigc = { NULL };
|
|
struct strbuf payload = STRBUF_INIT, sig = STRBUF_INIT;
|
|
|
|
if (!buf || type != OBJ_TAG)
|
|
goto next;
|
|
|
|
if (!parse_signature(buf, size, &payload, &sig))
|
|
;/* merely annotated */
|
|
else {
|
|
buf = payload.buf;
|
|
len = payload.len;
|
|
if (check_signature(payload.buf, payload.len, sig.buf,
|
|
sig.len, &sigc) &&
|
|
!sigc.gpg_output)
|
|
strbuf_addstr(&sig, "gpg verification failed.\n");
|
|
else
|
|
strbuf_addstr(&sig, sigc.gpg_output);
|
|
}
|
|
signature_check_clear(&sigc);
|
|
|
|
if (!tag_number++) {
|
|
fmt_tag_signature(&tagbuf, &sig, buf, len);
|
|
first_tag = i;
|
|
} else {
|
|
if (tag_number == 2) {
|
|
struct strbuf tagline = STRBUF_INIT;
|
|
strbuf_addch(&tagline, '\n');
|
|
strbuf_add_commented_lines(&tagline,
|
|
origins.items[first_tag].string,
|
|
strlen(origins.items[first_tag].string));
|
|
strbuf_insert(&tagbuf, 0, tagline.buf,
|
|
tagline.len);
|
|
strbuf_release(&tagline);
|
|
}
|
|
strbuf_addch(&tagbuf, '\n');
|
|
strbuf_add_commented_lines(&tagbuf,
|
|
origins.items[i].string,
|
|
strlen(origins.items[i].string));
|
|
fmt_tag_signature(&tagbuf, &sig, buf, len);
|
|
}
|
|
strbuf_release(&payload);
|
|
strbuf_release(&sig);
|
|
next:
|
|
free(origbuf);
|
|
}
|
|
if (tagbuf.len) {
|
|
strbuf_addch(out, '\n');
|
|
strbuf_addbuf(out, &tagbuf);
|
|
}
|
|
strbuf_release(&tagbuf);
|
|
}
|
|
|
|
static void find_merge_parents(struct merge_parents *result,
|
|
struct strbuf *in, struct object_id *head)
|
|
{
|
|
struct commit_list *parents;
|
|
struct commit *head_commit;
|
|
int pos = 0, i, j;
|
|
|
|
parents = NULL;
|
|
while (pos < in->len) {
|
|
int len;
|
|
char *p = in->buf + pos;
|
|
char *newline = strchr(p, '\n');
|
|
const char *q;
|
|
struct object_id oid;
|
|
struct commit *parent;
|
|
struct object *obj;
|
|
|
|
len = newline ? newline - p : strlen(p);
|
|
pos += len + !!newline;
|
|
|
|
if (parse_oid_hex(p, &oid, &q) ||
|
|
q[0] != '\t' ||
|
|
q[1] != '\t')
|
|
continue; /* skip not-for-merge */
|
|
/*
|
|
* Do not use get_merge_parent() here; we do not have
|
|
* "name" here and we do not want to contaminate its
|
|
* util field yet.
|
|
*/
|
|
obj = parse_object(the_repository, &oid);
|
|
parent = (struct commit *)peel_to_type(NULL, 0, obj, OBJ_COMMIT);
|
|
if (!parent)
|
|
continue;
|
|
commit_list_insert(parent, &parents);
|
|
add_merge_parent(result, &obj->oid, &parent->object.oid);
|
|
}
|
|
head_commit = lookup_commit(the_repository, head);
|
|
if (head_commit)
|
|
commit_list_insert(head_commit, &parents);
|
|
reduce_heads_replace(&parents);
|
|
|
|
while (parents) {
|
|
struct commit *cmit = pop_commit(&parents);
|
|
for (i = 0; i < result->nr; i++)
|
|
if (oideq(&result->item[i].commit, &cmit->object.oid))
|
|
result->item[i].used = 1;
|
|
}
|
|
|
|
for (i = j = 0; i < result->nr; i++) {
|
|
if (result->item[i].used) {
|
|
if (i != j)
|
|
result->item[j] = result->item[i];
|
|
j++;
|
|
}
|
|
}
|
|
result->nr = j;
|
|
}
|
|
|
|
|
|
int fmt_merge_msg(struct strbuf *in, struct strbuf *out,
|
|
struct fmt_merge_msg_opts *opts)
|
|
{
|
|
int i = 0, pos = 0;
|
|
struct object_id head_oid;
|
|
const char *current_branch;
|
|
void *current_branch_to_free;
|
|
struct merge_parents merge_parents;
|
|
|
|
if (!suppress_dest_pattern_seen) {
|
|
string_list_append(&suppress_dest_patterns, "main");
|
|
string_list_append(&suppress_dest_patterns, "master");
|
|
}
|
|
|
|
memset(&merge_parents, 0, sizeof(merge_parents));
|
|
|
|
/* get current branch */
|
|
current_branch = current_branch_to_free =
|
|
resolve_refdup("HEAD", RESOLVE_REF_READING, &head_oid, NULL);
|
|
if (!current_branch)
|
|
die("No current branch");
|
|
if (starts_with(current_branch, "refs/heads/"))
|
|
current_branch += 11;
|
|
|
|
find_merge_parents(&merge_parents, in, &head_oid);
|
|
|
|
/* get a line */
|
|
while (pos < in->len) {
|
|
int len;
|
|
char *newline, *p = in->buf + pos;
|
|
|
|
newline = strchr(p, '\n');
|
|
len = newline ? newline - p : strlen(p);
|
|
pos += len + !!newline;
|
|
i++;
|
|
p[len] = 0;
|
|
if (handle_line(p, &merge_parents))
|
|
die("error in line %d: %.*s", i, len, p);
|
|
}
|
|
|
|
if (opts->add_title && srcs.nr)
|
|
fmt_merge_msg_title(out, current_branch);
|
|
|
|
if (origins.nr)
|
|
fmt_merge_msg_sigs(out);
|
|
|
|
if (opts->shortlog_len) {
|
|
struct commit *head;
|
|
struct rev_info rev;
|
|
|
|
head = lookup_commit_or_die(&head_oid, "HEAD");
|
|
repo_init_revisions(the_repository, &rev, NULL);
|
|
rev.commit_format = CMIT_FMT_ONELINE;
|
|
diff_merges_suppress(&rev);
|
|
rev.limited = 1;
|
|
|
|
strbuf_complete_line(out);
|
|
|
|
for (i = 0; i < origins.nr; i++)
|
|
shortlog(origins.items[i].string,
|
|
origins.items[i].util,
|
|
head, &rev, opts, out);
|
|
}
|
|
|
|
strbuf_complete_line(out);
|
|
free(current_branch_to_free);
|
|
free(merge_parents.item);
|
|
return 0;
|
|
}
|