From ef24c7ca055f03c673c2b67a3a7c92bcc32f62f0 Mon Sep 17 00:00:00 2001 From: Christian Couder Date: Sun, 19 Apr 2009 11:56:07 +0200 Subject: bisect--helper: add "--next-exit" to output bisect results The goal of this patch is to port more shell code from the "bisect_next" function in "git-bisect.sh" to C code in "builtin-bisect--helper.c". So we port the code that interprets the bisection result and stops or continues (by checking out the next revision) the bisection process. Signed-off-by: Christian Couder Signed-off-by: Junio C Hamano --- bisect.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) (limited to 'bisect.c') diff --git a/bisect.c b/bisect.c index 0448eae3f8..5902e83fac 100644 --- a/bisect.c +++ b/bisect.c @@ -6,6 +6,7 @@ #include "list-objects.h" #include "quote.h" #include "sha1-lookup.h" +#include "run-command.h" #include "bisect.h" static unsigned char (*skipped_sha1)[20]; @@ -16,6 +17,12 @@ static const char **rev_argv; static int rev_argv_nr; static int rev_argv_alloc; +static const unsigned char *current_bad_sha1; + +static const char *argv_diff_tree[] = {"diff-tree", "--pretty", NULL, NULL}; +static const char *argv_checkout[] = {"checkout", "-q", NULL, "--", NULL}; +static const char *argv_show_branch[] = {"show-branch", NULL, NULL}; + /* bits #0-15 in revision.h */ #define COUNTED (1u<<16) @@ -403,6 +410,7 @@ static int register_ref(const char *refname, const unsigned char *sha1, { if (!strcmp(refname, "bad")) { ALLOC_GROW(rev_argv, rev_argv_nr + 1, rev_argv_alloc); + current_bad_sha1 = sha1; rev_argv[rev_argv_nr++] = xstrdup(sha1_to_hex(sha1)); } else if (!prefixcmp(refname, "good-")) { const char *hex = sha1_to_hex(sha1); @@ -560,3 +568,100 @@ int bisect_next_vars(const char *prefix) return show_bisect_vars(&info, reaches, all); } + +static void exit_if_skipped_commits(struct commit_list *tried, + const unsigned char *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"); + if (bad) + printf("%s\n", sha1_to_hex(bad)); + printf("We cannot bisect more!\n"); + exit(2); +} + +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("could not create file '%s': %s", + filename, strerror(errno)); + + 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 res; + + mark_expected_rev(bisect_rev_hex); + + argv_checkout[2] = bisect_rev_hex; + res = run_command_v_opt(argv_checkout, RUN_GIT_CMD); + if (res) + exit(res); + + argv_show_branch[1] = bisect_rev_hex; + return run_command_v_opt(argv_show_branch, RUN_GIT_CMD); +} + +/* + * 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. + */ +int bisect_next_exit(const char *prefix) +{ + struct rev_info revs; + struct commit_list *tried; + int reaches = 0, all = 0, nr; + const unsigned char *bisect_rev; + char bisect_rev_hex[41]; + + bisect_common(&revs, prefix, &reaches, &all); + + revs.commits = filter_skipped(revs.commits, &tried, 0); + + if (!revs.commits) { + /* + * We should exit here only if the "bad" + * commit is also a "skip" commit. + */ + exit_if_skipped_commits(tried, NULL); + + printf("%s was both good and bad\n", + sha1_to_hex(current_bad_sha1)); + exit(1); + } + + bisect_rev = revs.commits->item->object.sha1; + memcpy(bisect_rev_hex, sha1_to_hex(bisect_rev), 41); + + if (!hashcmp(bisect_rev, current_bad_sha1)) { + exit_if_skipped_commits(tried, current_bad_sha1); + printf("%s is first bad commit\n", bisect_rev_hex); + argv_diff_tree[2] = bisect_rev_hex; + run_command_v_opt(argv_diff_tree, RUN_GIT_CMD); + /* This means the bisection process succeeded. */ + exit(10); + } + + nr = all - reaches - 1; + printf("Bisecting: %d revisions left to test after this " + "(roughly %d steps)\n", nr, estimate_bisect_steps(all)); + + return bisect_checkout(bisect_rev_hex); +} + -- cgit v1.2.3