sequencer: introduce todo_list_write_to_file()

diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index db9091e249454e2678ce37fb7c5c5b391e330bcc..417d141c09ad2698c17cf4738ad6ce7177456088 100644 (file)
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -4,9 +4,14 @@
 #include "bisect.h"
 #include "refs.h"
 
+static GIT_PATH_FUNC(git_path_bisect_terms, "BISECT_TERMS")
+static GIT_PATH_FUNC(git_path_bisect_expected_rev, "BISECT_EXPECTED_REV")
+static GIT_PATH_FUNC(git_path_bisect_ancestors_ok, "BISECT_ANCESTORS_OK")
+
 static const char * const git_bisect_helper_usage[] = {
        N_("git bisect--helper --next-all [--no-checkout]"),
-       N_("git bisect--helper --check-term-format <term> <orig_term>"),
+       N_("git bisect--helper --write-terms <bad_term> <good_term>"),
+       N_("git bisect--helper --bisect-clean-state"),
        NULL
 };
 
@@ -41,7 +46,7 @@ static int check_term_format(const char *term, const char *orig_term)
                return error(_("'%s' is not a valid term"), term);
 
        if (one_of(term, "help", "start", "skip", "next", "reset",
-                       "visualize", "replay", "log", "run", "terms", NULL))
+                       "visualize", "view", "replay", "log", "run", "terms", NULL))
                return error(_("can't use the builtin command '%s' as a term"), term);
 
        /*
@@ -57,18 +62,68 @@ static int check_term_format(const char *term, const char *orig_term)
        return 0;
 }
 
+static int write_terms(const char *bad, const char *good)
+{
+       FILE *fp = NULL;
+       int res;
+
+       if (!strcmp(bad, good))
+               return error(_("please use two different terms"));
+
+       if (check_term_format(bad, "bad") || check_term_format(good, "good"))
+               return -1;
+
+       fp = fopen(git_path_bisect_terms(), "w");
+       if (!fp)
+               return error_errno(_("could not open the file BISECT_TERMS"));
+
+       res = fprintf(fp, "%s\n%s\n", bad, good);
+       res |= fclose(fp);
+       return (res < 0) ? -1 : 0;
+}
+
+static int is_expected_rev(const char *expected_hex)
+{
+       struct strbuf actual_hex = STRBUF_INIT;
+       int res = 0;
+       if (strbuf_read_file(&actual_hex, git_path_bisect_expected_rev(), 0) >= 40) {
+               strbuf_trim(&actual_hex);
+               res = !strcmp(actual_hex.buf, expected_hex);
+       }
+       strbuf_release(&actual_hex);
+       return res;
+}
+
+static void check_expected_revs(const char **revs, int rev_nr)
+{
+       int i;
+
+       for (i = 0; i < rev_nr; i++) {
+               if (!is_expected_rev(revs[i])) {
+                       unlink_or_warn(git_path_bisect_ancestors_ok());
+                       unlink_or_warn(git_path_bisect_expected_rev());
+               }
+       }
+}
+
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
        enum {
                NEXT_ALL = 1,
-               CHECK_TERM_FMT
+               WRITE_TERMS,
+               BISECT_CLEAN_STATE,
+               CHECK_EXPECTED_REVS
        } cmdmode = 0;
        int no_checkout = 0;
        struct option options[] = {
                OPT_CMDMODE(0, "next-all", &cmdmode,
                         N_("perform 'git bisect next'"), NEXT_ALL),
-               OPT_CMDMODE(0, "check-term-format", &cmdmode,
-                        N_("check format of the term"), CHECK_TERM_FMT),
+               OPT_CMDMODE(0, "write-terms", &cmdmode,
+                        N_("write the terms to .git/BISECT_TERMS"), WRITE_TERMS),
+               OPT_CMDMODE(0, "bisect-clean-state", &cmdmode,
+                        N_("cleanup the bisection state"), BISECT_CLEAN_STATE),
+               OPT_CMDMODE(0, "check-expected-revs", &cmdmode,
+                        N_("check for expected revs"), CHECK_EXPECTED_REVS),
                OPT_BOOL(0, "no-checkout", &no_checkout,
                         N_("update BISECT_HEAD instead of checking out the current commit")),
                OPT_END()
@@ -82,11 +137,18 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 
        switch (cmdmode) {
        case NEXT_ALL:
-               return bisect_next_all(prefix, no_checkout);
-       case CHECK_TERM_FMT:
+               return bisect_next_all(the_repository, prefix, no_checkout);
+       case WRITE_TERMS:
                if (argc != 2)
-                       return error(_("--check-term-format requires two arguments"));
-               return check_term_format(argv[0], argv[1]);
+                       return error(_("--write-terms requires two arguments"));
+               return write_terms(argv[0], argv[1]);
+       case BISECT_CLEAN_STATE:
+               if (argc != 0)
+                       return error(_("--bisect-clean-state requires no arguments"));
+               return bisect_clean_state();
+       case CHECK_EXPECTED_REVS:
+               check_expected_revs(argv, argc);
+               return 0;
        default:
                return error("BUG: unknown subcommand '%d'", cmdmode);
        }