Imported Upstream version 2.10.4
[platform/upstream/git.git] / bisect.c
index df09cbc..6f512c2 100644 (file)
--- a/bisect.c
+++ b/bisect.c
 static struct sha1_array good_revs;
 static struct sha1_array skipped_revs;
 
-static unsigned char *current_bad_sha1;
+static struct object_id *current_bad_oid;
 
 static const char *argv_checkout[] = {"checkout", "-q", NULL, "--", NULL};
 static const char *argv_show_branch[] = {"show-branch", NULL, NULL};
-static const char *argv_update_ref[] = {"update-ref", "--no-deref", "BISECT_HEAD", NULL, NULL};
+
+static const char *term_bad;
+static const char *term_good;
 
 /* Remember to update object flag allocation in object.h */
 #define COUNTED                (1u<<16)
@@ -191,7 +193,7 @@ static int compare_commit_dist(const void *a_, const void *b_)
        b = (struct commit_dist *)b_;
        if (a->distance != b->distance)
                return b->distance - a->distance; /* desc sort */
-       return hashcmp(a->commit->object.sha1, b->commit->object.sha1);
+       return oidcmp(&a->commit->object.oid, &b->commit->object.oid);
 }
 
 static struct commit_list *best_bisection_sorted(struct commit_list *list, int nr)
@@ -400,18 +402,24 @@ struct commit_list *find_bisection(struct commit_list *list,
        return best;
 }
 
-static int register_ref(const char *refname, const unsigned char *sha1,
+static int register_ref(const char *refname, const struct object_id *oid,
                        int flags, void *cb_data)
 {
-       if (!strcmp(refname, "bad")) {
-               current_bad_sha1 = xmalloc(20);
-               hashcpy(current_bad_sha1, sha1);
-       } else if (starts_with(refname, "good-")) {
-               sha1_array_append(&good_revs, sha1);
+       struct strbuf good_prefix = STRBUF_INIT;
+       strbuf_addstr(&good_prefix, term_good);
+       strbuf_addstr(&good_prefix, "-");
+
+       if (!strcmp(refname, term_bad)) {
+               current_bad_oid = xmalloc(sizeof(*current_bad_oid));
+               oidcpy(current_bad_oid, oid);
+       } else if (starts_with(refname, good_prefix.buf)) {
+               sha1_array_append(&good_revs, oid->hash);
        } else if (starts_with(refname, "skip-")) {
-               sha1_array_append(&skipped_revs, sha1);
+               sha1_array_append(&skipped_revs, oid->hash);
        }
 
+       strbuf_release(&good_prefix);
+
        return 0;
 }
 
@@ -420,19 +428,22 @@ static int read_bisect_refs(void)
        return for_each_ref_in("refs/bisect/", register_ref, NULL);
 }
 
+static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES")
+static GIT_PATH_FUNC(git_path_bisect_expected_rev, "BISECT_EXPECTED_REV")
+
 static void read_bisect_paths(struct argv_array *array)
 {
        struct strbuf str = STRBUF_INIT;
-       const char *filename = git_path("BISECT_NAMES");
+       const char *filename = git_path_bisect_names();
        FILE *fp = fopen(filename, "r");
 
        if (!fp)
-               die_errno("Could not open file '%s'", filename);
+               die_errno(_("Could not open file '%s'"), filename);
 
-       while (strbuf_getline(&str, fp, '\n') != EOF) {
+       while (strbuf_getline_lf(&str, fp) != EOF) {
                strbuf_trim(&str);
                if (sq_dequote_to_argv_array(str.buf, array))
-                       die("Badly quoted content in file '%s': %s",
+                       die(_("Badly quoted content in file '%s': %s"),
                            filename, str.buf);
        }
 
@@ -489,7 +500,7 @@ struct commit_list *filter_skipped(struct commit_list *list,
                struct commit_list *next = list->next;
                list->next = NULL;
                if (0 <= sha1_array_lookup(&skipped_revs,
-                                          list->item->object.sha1)) {
+                                          list->item->object.oid.hash)) {
                        if (skipped_first && !*skipped_first)
                                *skipped_first = 1;
                        /* Move current to tried list */
@@ -564,7 +575,7 @@ static struct commit_list *skip_away(struct commit_list *list, int count)
 
        for (i = 0; cur; cur = cur->next, i++) {
                if (i == index) {
-                       if (hashcmp(cur->item->object.sha1, current_bad_sha1))
+                       if (oidcmp(&cur->item->object.oid, current_bad_oid))
                                return cur;
                        if (previous)
                                return previous;
@@ -607,7 +618,7 @@ static void bisect_rev_setup(struct rev_info *revs, const char *prefix,
 
        /* rev_argv.argv[0] will be ignored by setup_revisions */
        argv_array_push(&rev_argv, "bisect_rev_setup");
-       argv_array_pushf(&rev_argv, bad_format, sha1_to_hex(current_bad_sha1));
+       argv_array_pushf(&rev_argv, bad_format, oid_to_hex(current_bad_oid));
        for (i = 0; i < good_revs.nr; i++)
                argv_array_pushf(&rev_argv, good_format,
                                 sha1_to_hex(good_revs.sha1[i]));
@@ -628,23 +639,26 @@ static void bisect_common(struct rev_info *revs)
 }
 
 static void exit_if_skipped_commits(struct commit_list *tried,
-                                   const unsigned char *bad)
+                                   const struct object_id *bad)
 {
        if (!tried)
                return;
 
        printf("There are only 'skip'ped commits left to test.\n"
-              "The first bad commit could be any of:\n");
-       print_commit_list(tried, "%s\n", "%s\n");
+              "The first %s commit could be any of:\n", term_bad);
+
+       for ( ; tried; tried = tried->next)
+               printf("%s\n", oid_to_hex(&tried->item->object.oid));
+
        if (bad)
-               printf("%s\n", sha1_to_hex(bad));
-       printf("We cannot bisect more!\n");
+               printf("%s\n", oid_to_hex(bad));
+       printf(_("We cannot bisect more!\n"));
        exit(2);
 }
 
-static int is_expected_rev(const unsigned char *sha1)
+static int is_expected_rev(const struct object_id *oid)
 {
-       const char *filename = git_path("BISECT_EXPECTED_REV");
+       const char *filename = git_path_bisect_expected_rev();
        struct stat st;
        struct strbuf str = STRBUF_INIT;
        FILE *fp;
@@ -657,8 +671,8 @@ static int is_expected_rev(const unsigned char *sha1)
        if (!fp)
                return 0;
 
-       if (strbuf_getline(&str, fp, '\n') != EOF)
-               res = !strcmp(str.buf, sha1_to_hex(sha1));
+       if (strbuf_getline_lf(&str, fp) != EOF)
+               res = !strcmp(str.buf, oid_to_hex(oid));
 
        strbuf_release(&str);
        fclose(fp);
@@ -666,34 +680,16 @@ static int is_expected_rev(const unsigned char *sha1)
        return res;
 }
 
-static void mark_expected_rev(char *bisect_rev_hex)
-{
-       int len = strlen(bisect_rev_hex);
-       const char *filename = git_path("BISECT_EXPECTED_REV");
-       int fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600);
-
-       if (fd < 0)
-               die_errno("could not create file '%s'", filename);
-
-       bisect_rev_hex[len] = '\n';
-       write_or_die(fd, bisect_rev_hex, len + 1);
-       bisect_rev_hex[len] = '\0';
-
-       if (close(fd) < 0)
-               die("closing file %s: %s", filename, strerror(errno));
-}
-
-static int bisect_checkout(char *bisect_rev_hex, int no_checkout)
+static int bisect_checkout(const unsigned char *bisect_rev, int no_checkout)
 {
+       char bisect_rev_hex[GIT_SHA1_HEXSZ + 1];
 
-       mark_expected_rev(bisect_rev_hex);
+       memcpy(bisect_rev_hex, sha1_to_hex(bisect_rev), GIT_SHA1_HEXSZ + 1);
+       update_ref(NULL, "BISECT_EXPECTED_REV", bisect_rev, NULL, 0, UPDATE_REFS_DIE_ON_ERR);
 
        argv_checkout[2] = bisect_rev_hex;
        if (no_checkout) {
-               argv_update_ref[3] = bisect_rev_hex;
-               if (run_command_v_opt(argv_update_ref, RUN_GIT_CMD))
-                       die("update-ref --no-deref HEAD failed on %s",
-                           bisect_rev_hex);
+               update_ref(NULL, "BISECT_HEAD", bisect_rev, NULL, 0, UPDATE_REFS_DIE_ON_ERR);
        } else {
                int res;
                res = run_command_v_opt(argv_checkout, RUN_GIT_CMD);
@@ -709,17 +705,17 @@ static struct commit *get_commit_reference(const unsigned char *sha1)
 {
        struct commit *r = lookup_commit_reference(sha1);
        if (!r)
-               die("Not a valid commit name %s", sha1_to_hex(sha1));
+               die(_("Not a valid commit name %s"), sha1_to_hex(sha1));
        return r;
 }
 
 static struct commit **get_bad_and_good_commits(int *rev_nr)
 {
-       int len = 1 + good_revs.nr;
-       struct commit **rev = xmalloc(len * sizeof(*rev));
+       struct commit **rev;
        int i, n = 0;
 
-       rev[n++] = get_commit_reference(current_bad_sha1);
+       ALLOC_ARRAY(rev, 1 + good_revs.nr);
+       rev[n++] = get_commit_reference(current_bad_oid->hash);
        for (i = 0; i < good_revs.nr; i++)
                rev[n++] = get_commit_reference(good_revs.sha1[i]);
        *rev_nr = n;
@@ -729,45 +725,56 @@ static struct commit **get_bad_and_good_commits(int *rev_nr)
 
 static void handle_bad_merge_base(void)
 {
-       if (is_expected_rev(current_bad_sha1)) {
-               char *bad_hex = sha1_to_hex(current_bad_sha1);
+       if (is_expected_rev(current_bad_oid)) {
+               char *bad_hex = oid_to_hex(current_bad_oid);
                char *good_hex = join_sha1_array_hex(&good_revs, ' ');
-
-               fprintf(stderr, "The merge base %s is bad.\n"
-                       "This means the bug has been fixed "
-                       "between %s and [%s].\n",
-                       bad_hex, bad_hex, good_hex);
-
+               if (!strcmp(term_bad, "bad") && !strcmp(term_good, "good")) {
+                       fprintf(stderr, _("The merge base %s is bad.\n"
+                               "This means the bug has been fixed "
+                               "between %s and [%s].\n"),
+                               bad_hex, bad_hex, good_hex);
+               } else if (!strcmp(term_bad, "new") && !strcmp(term_good, "old")) {
+                       fprintf(stderr, _("The merge base %s is new.\n"
+                               "The property has changed "
+                               "between %s and [%s].\n"),
+                               bad_hex, bad_hex, good_hex);
+               } else {
+                       fprintf(stderr, _("The merge base %s is %s.\n"
+                               "This means the first '%s' commit is "
+                               "between %s and [%s].\n"),
+                               bad_hex, term_bad, term_good, bad_hex, good_hex);
+               }
                exit(3);
        }
 
-       fprintf(stderr, "Some good revs are not ancestor of the bad rev.\n"
+       fprintf(stderr, _("Some %s revs are not ancestor of the %s rev.\n"
                "git bisect cannot work properly in this case.\n"
-               "Maybe you mistake good and bad revs?\n");
+               "Maybe you mistook %s and %s revs?\n"),
+               term_good, term_bad, term_good, term_bad);
        exit(1);
 }
 
 static void handle_skipped_merge_base(const unsigned char *mb)
 {
        char *mb_hex = sha1_to_hex(mb);
-       char *bad_hex = sha1_to_hex(current_bad_sha1);
+       char *bad_hex = oid_to_hex(current_bad_oid);
        char *good_hex = join_sha1_array_hex(&good_revs, ' ');
 
-       warning("the merge base between %s and [%s] "
+       warning(_("the merge base between %s and [%s] "
                "must be skipped.\n"
-               "So we cannot be sure the first bad commit is "
+               "So we cannot be sure the first %s commit is "
                "between %s and %s.\n"
-               "We continue anyway.",
-               bad_hex, good_hex, mb_hex, bad_hex);
+               "We continue anyway."),
+               bad_hex, good_hex, term_bad, mb_hex, bad_hex);
        free(good_hex);
 }
 
 /*
- * "check_merge_bases" checks that merge bases are not "bad".
+ * "check_merge_bases" checks that merge bases are not "bad" (or "new").
  *
- * - If one is "bad", it means the user assumed something wrong
+ * - If one is "bad" (or "new"), it means the user assumed something wrong
  * and we must exit with a non 0 error code.
- * - If one is "good", that's good, we have nothing to do.
+ * - If one is "good" (or "old"), that's good, we have nothing to do.
  * - If one is "skipped", we can't know but we should warn.
  * - If we don't know, we should check it out and ask the user to test.
  */
@@ -777,19 +784,19 @@ static void check_merge_bases(int no_checkout)
        int rev_nr;
        struct commit **rev = get_bad_and_good_commits(&rev_nr);
 
-       result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1, 0);
+       result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1);
 
        for (; result; result = result->next) {
-               const unsigned char *mb = result->item->object.sha1;
-               if (!hashcmp(mb, current_bad_sha1)) {
+               const unsigned char *mb = result->item->object.oid.hash;
+               if (!hashcmp(mb, current_bad_oid->hash)) {
                        handle_bad_merge_base();
                } else if (0 <= sha1_array_lookup(&good_revs, mb)) {
                        continue;
                } else if (0 <= sha1_array_lookup(&skipped_revs, mb)) {
                        handle_skipped_merge_base(mb);
                } else {
-                       printf("Bisecting: a merge base must be tested\n");
-                       exit(bisect_checkout(sha1_to_hex(mb), no_checkout));
+                       printf(_("Bisecting: a merge base must be tested\n"));
+                       exit(bisect_checkout(mb, no_checkout));
                }
        }
 
@@ -838,8 +845,8 @@ static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
        struct stat st;
        int fd;
 
-       if (!current_bad_sha1)
-               die("a bad revision is needed");
+       if (!current_bad_oid)
+               die(_("a %s revision is needed"), term_bad);
 
        /* Check if file BISECT_ANCESTORS_OK exists. */
        if (!stat(filename, &st) && S_ISREG(st.st_mode))
@@ -856,8 +863,8 @@ static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
        /* Create file BISECT_ANCESTORS_OK. */
        fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600);
        if (fd < 0)
-               warning("could not create file '%s': %s",
-                       filename, strerror(errno));
+               warning_errno(_("could not create file '%s'"),
+                             filename);
        else
                close(fd);
  done:
@@ -886,10 +893,40 @@ static void show_diff_tree(const char *prefix, struct commit *commit)
        if (!opt.diffopt.output_format)
                opt.diffopt.output_format = DIFF_FORMAT_RAW;
 
+       setup_revisions(0, NULL, &opt, NULL);
        log_tree_commit(&opt, commit);
 }
 
 /*
+ * The terms used for this bisect session are stored in BISECT_TERMS.
+ * We read them and store them to adapt the messages accordingly.
+ * Default is bad/good.
+ */
+void read_bisect_terms(const char **read_bad, const char **read_good)
+{
+       struct strbuf str = STRBUF_INIT;
+       const char *filename = git_path("BISECT_TERMS");
+       FILE *fp = fopen(filename, "r");
+
+       if (!fp) {
+               if (errno == ENOENT) {
+                       *read_bad = "bad";
+                       *read_good = "good";
+                       return;
+               } else {
+                       die_errno(_("could not read file '%s'"), filename);
+               }
+       } else {
+               strbuf_getline_lf(&str, fp);
+               *read_bad = strbuf_detach(&str, NULL);
+               strbuf_getline_lf(&str, fp);
+               *read_good = strbuf_detach(&str, NULL);
+       }
+       strbuf_release(&str);
+       fclose(fp);
+}
+
+/*
  * We use the convention that exiting with an exit code 10 means that
  * the bisection process finished successfully.
  * In this case the calling shell script should exit 0.
@@ -903,10 +940,11 @@ int bisect_next_all(const char *prefix, int no_checkout)
        struct commit_list *tried;
        int reaches = 0, all = 0, nr, steps;
        const unsigned char *bisect_rev;
-       char bisect_rev_hex[41];
+       char steps_msg[32];
 
+       read_bisect_terms(&term_bad, &term_good);
        if (read_bisect_refs())
-               die("reading bisect refs failed");
+               die(_("reading bisect refs failed"));
 
        check_good_are_ancestors_of_bad(prefix, no_checkout);
 
@@ -926,23 +964,25 @@ int bisect_next_all(const char *prefix, int no_checkout)
                 */
                exit_if_skipped_commits(tried, NULL);
 
-               printf("%s was both good and bad\n",
-                      sha1_to_hex(current_bad_sha1));
+               printf(_("%s was both %s and %s\n"),
+                      oid_to_hex(current_bad_oid),
+                      term_good,
+                      term_bad);
                exit(1);
        }
 
        if (!all) {
-               fprintf(stderr, "No testable commit found.\n"
-                       "Maybe you started with bad path parameters?\n");
+               fprintf(stderr, _("No testable commit found.\n"
+                       "Maybe you started with bad path parameters?\n"));
                exit(4);
        }
 
-       bisect_rev = revs.commits->item->object.sha1;
-       memcpy(bisect_rev_hex, sha1_to_hex(bisect_rev), 41);
+       bisect_rev = revs.commits->item->object.oid.hash;
 
-       if (!hashcmp(bisect_rev, current_bad_sha1)) {
-               exit_if_skipped_commits(tried, current_bad_sha1);
-               printf("%s is the first bad commit\n", bisect_rev_hex);
+       if (!hashcmp(bisect_rev, current_bad_oid->hash)) {
+               exit_if_skipped_commits(tried, current_bad_oid);
+               printf("%s is the first %s commit\n", sha1_to_hex(bisect_rev),
+                       term_bad);
                show_diff_tree(prefix, revs.commits->item);
                /* This means the bisection process succeeded. */
                exit(10);
@@ -950,11 +990,16 @@ int bisect_next_all(const char *prefix, int no_checkout)
 
        nr = all - reaches - 1;
        steps = estimate_bisect_steps(all);
-       printf("Bisecting: %d revision%s left to test after this "
-              "(roughly %d step%s)\n", nr, (nr == 1 ? "" : "s"),
-              steps, (steps == 1 ? "" : "s"));
-
-       return bisect_checkout(bisect_rev_hex, no_checkout);
+       xsnprintf(steps_msg, sizeof(steps_msg),
+                 Q_("(roughly %d step)", "(roughly %d steps)", steps),
+                 steps);
+       /* TRANSLATORS: the last %s will be replaced with
+          "(roughly %d steps)" translation */
+       printf(Q_("Bisecting: %d revision left to test after this %s\n",
+                 "Bisecting: %d revisions left to test after this %s\n",
+                 nr), nr, steps_msg);
+
+       return bisect_checkout(bisect_rev, no_checkout);
 }
 
 static inline int log2i(int n)