LIB_OBJS += archive-zip.o
LIB_OBJS += attr.o
LIB_OBJS += base85.o
+LIB_OBJS += bisect.o
LIB_OBJS += blob.o
LIB_OBJS += branch.o
LIB_OBJS += bundle.o
BUILTIN_OBJS += builtin-annotate.o
BUILTIN_OBJS += builtin-apply.o
BUILTIN_OBJS += builtin-archive.o
+BUILTIN_OBJS += builtin-bisect--helper.o
BUILTIN_OBJS += builtin-blame.o
BUILTIN_OBJS += builtin-branch.o
BUILTIN_OBJS += builtin-bundle.o
--- /dev/null
+#include "cache.h"
+#include "commit.h"
+#include "diff.h"
+#include "revision.h"
+#include "refs.h"
+#include "list-objects.h"
+#include "quote.h"
+#include "sha1-lookup.h"
+#include "bisect.h"
+
+static unsigned char (*skipped_sha1)[20];
+static int skipped_sha1_nr;
+static int skipped_sha1_alloc;
+
+static const char **rev_argv;
+static int rev_argv_nr;
+static int rev_argv_alloc;
+
+/* bits #0-15 in revision.h */
+
+#define COUNTED (1u<<16)
+
+/*
+ * This is a truly stupid algorithm, but it's only
+ * used for bisection, and we just don't care enough.
+ *
+ * We care just barely enough to avoid recursing for
+ * non-merge entries.
+ */
+static int count_distance(struct commit_list *entry)
+{
+ int nr = 0;
+
+ while (entry) {
+ struct commit *commit = entry->item;
+ struct commit_list *p;
+
+ if (commit->object.flags & (UNINTERESTING | COUNTED))
+ break;
+ if (!(commit->object.flags & TREESAME))
+ nr++;
+ commit->object.flags |= COUNTED;
+ p = commit->parents;
+ entry = p;
+ if (p) {
+ p = p->next;
+ while (p) {
+ nr += count_distance(p);
+ p = p->next;
+ }
+ }
+ }
+
+ return nr;
+}
+
+static void clear_distance(struct commit_list *list)
+{
+ while (list) {
+ struct commit *commit = list->item;
+ commit->object.flags &= ~COUNTED;
+ list = list->next;
+ }
+}
+
+#define DEBUG_BISECT 0
+
+static inline int weight(struct commit_list *elem)
+{
+ return *((int*)(elem->item->util));
+}
+
+static inline void weight_set(struct commit_list *elem, int weight)
+{
+ *((int*)(elem->item->util)) = weight;
+}
+
+static int count_interesting_parents(struct commit *commit)
+{
+ struct commit_list *p;
+ int count;
+
+ for (count = 0, p = commit->parents; p; p = p->next) {
+ if (p->item->object.flags & UNINTERESTING)
+ continue;
+ count++;
+ }
+ return count;
+}
+
+static inline int halfway(struct commit_list *p, int nr)
+{
+ /*
+ * Don't short-cut something we are not going to return!
+ */
+ if (p->item->object.flags & TREESAME)
+ return 0;
+ if (DEBUG_BISECT)
+ return 0;
+ /*
+ * 2 and 3 are halfway of 5.
+ * 3 is halfway of 6 but 2 and 4 are not.
+ */
+ switch (2 * weight(p) - nr) {
+ case -1: case 0: case 1:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+#if !DEBUG_BISECT
+#define show_list(a,b,c,d) do { ; } while (0)
+#else
+static void show_list(const char *debug, int counted, int nr,
+ struct commit_list *list)
+{
+ struct commit_list *p;
+
+ fprintf(stderr, "%s (%d/%d)\n", debug, counted, nr);
+
+ for (p = list; p; p = p->next) {
+ struct commit_list *pp;
+ struct commit *commit = p->item;
+ unsigned flags = commit->object.flags;
+ enum object_type type;
+ unsigned long size;
+ char *buf = read_sha1_file(commit->object.sha1, &type, &size);
+ char *ep, *sp;
+
+ fprintf(stderr, "%c%c%c ",
+ (flags & TREESAME) ? ' ' : 'T',
+ (flags & UNINTERESTING) ? 'U' : ' ',
+ (flags & COUNTED) ? 'C' : ' ');
+ if (commit->util)
+ fprintf(stderr, "%3d", weight(p));
+ else
+ fprintf(stderr, "---");
+ fprintf(stderr, " %.*s", 8, sha1_to_hex(commit->object.sha1));
+ for (pp = commit->parents; pp; pp = pp->next)
+ fprintf(stderr, " %.*s", 8,
+ sha1_to_hex(pp->item->object.sha1));
+
+ sp = strstr(buf, "\n\n");
+ if (sp) {
+ sp += 2;
+ for (ep = sp; *ep && *ep != '\n'; ep++)
+ ;
+ fprintf(stderr, " %.*s", (int)(ep - sp), sp);
+ }
+ fprintf(stderr, "\n");
+ }
+}
+#endif /* DEBUG_BISECT */
+
+static struct commit_list *best_bisection(struct commit_list *list, int nr)
+{
+ struct commit_list *p, *best;
+ int best_distance = -1;
+
+ best = list;
+ for (p = list; p; p = p->next) {
+ int distance;
+ unsigned flags = p->item->object.flags;
+
+ if (flags & TREESAME)
+ continue;
+ distance = weight(p);
+ if (nr - distance < distance)
+ distance = nr - distance;
+ if (distance > best_distance) {
+ best = p;
+ best_distance = distance;
+ }
+ }
+
+ return best;
+}
+
+struct commit_dist {
+ struct commit *commit;
+ int distance;
+};
+
+static int compare_commit_dist(const void *a_, const void *b_)
+{
+ struct commit_dist *a, *b;
+
+ a = (struct commit_dist *)a_;
+ 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);
+}
+
+static struct commit_list *best_bisection_sorted(struct commit_list *list, int nr)
+{
+ struct commit_list *p;
+ struct commit_dist *array = xcalloc(nr, sizeof(*array));
+ int cnt, i;
+
+ for (p = list, cnt = 0; p; p = p->next) {
+ int distance;
+ unsigned flags = p->item->object.flags;
+
+ if (flags & TREESAME)
+ continue;
+ distance = weight(p);
+ if (nr - distance < distance)
+ distance = nr - distance;
+ array[cnt].commit = p->item;
+ array[cnt].distance = distance;
+ cnt++;
+ }
+ qsort(array, cnt, sizeof(*array), compare_commit_dist);
+ for (p = list, i = 0; i < cnt; i++) {
+ struct name_decoration *r = xmalloc(sizeof(*r) + 100);
+ struct object *obj = &(array[i].commit->object);
+
+ sprintf(r->name, "dist=%d", array[i].distance);
+ r->next = add_decoration(&name_decoration, obj, r);
+ p->item = array[i].commit;
+ p = p->next;
+ }
+ if (p)
+ p->next = NULL;
+ free(array);
+ return list;
+}
+
+/*
+ * zero or positive weight is the number of interesting commits it can
+ * reach, including itself. Especially, weight = 0 means it does not
+ * reach any tree-changing commits (e.g. just above uninteresting one
+ * but traversal is with pathspec).
+ *
+ * weight = -1 means it has one parent and its distance is yet to
+ * be computed.
+ *
+ * weight = -2 means it has more than one parent and its distance is
+ * unknown. After running count_distance() first, they will get zero
+ * or positive distance.
+ */
+static struct commit_list *do_find_bisection(struct commit_list *list,
+ int nr, int *weights,
+ int find_all)
+{
+ int n, counted;
+ struct commit_list *p;
+
+ counted = 0;
+
+ for (n = 0, p = list; p; p = p->next) {
+ struct commit *commit = p->item;
+ unsigned flags = commit->object.flags;
+
+ p->item->util = &weights[n++];
+ switch (count_interesting_parents(commit)) {
+ case 0:
+ if (!(flags & TREESAME)) {
+ weight_set(p, 1);
+ counted++;
+ show_list("bisection 2 count one",
+ counted, nr, list);
+ }
+ /*
+ * otherwise, it is known not to reach any
+ * tree-changing commit and gets weight 0.
+ */
+ break;
+ case 1:
+ weight_set(p, -1);
+ break;
+ default:
+ weight_set(p, -2);
+ break;
+ }
+ }
+
+ show_list("bisection 2 initialize", counted, nr, list);
+
+ /*
+ * If you have only one parent in the resulting set
+ * then you can reach one commit more than that parent
+ * can reach. So we do not have to run the expensive
+ * count_distance() for single strand of pearls.
+ *
+ * However, if you have more than one parents, you cannot
+ * just add their distance and one for yourself, since
+ * they usually reach the same ancestor and you would
+ * end up counting them twice that way.
+ *
+ * So we will first count distance of merges the usual
+ * way, and then fill the blanks using cheaper algorithm.
+ */
+ for (p = list; p; p = p->next) {
+ if (p->item->object.flags & UNINTERESTING)
+ continue;
+ if (weight(p) != -2)
+ continue;
+ weight_set(p, count_distance(p));
+ clear_distance(list);
+
+ /* Does it happen to be at exactly half-way? */
+ if (!find_all && halfway(p, nr))
+ return p;
+ counted++;
+ }
+
+ show_list("bisection 2 count_distance", counted, nr, list);
+
+ while (counted < nr) {
+ for (p = list; p; p = p->next) {
+ struct commit_list *q;
+ unsigned flags = p->item->object.flags;
+
+ if (0 <= weight(p))
+ continue;
+ for (q = p->item->parents; q; q = q->next) {
+ if (q->item->object.flags & UNINTERESTING)
+ continue;
+ if (0 <= weight(q))
+ break;
+ }
+ if (!q)
+ continue;
+
+ /*
+ * weight for p is unknown but q is known.
+ * add one for p itself if p is to be counted,
+ * otherwise inherit it from q directly.
+ */
+ if (!(flags & TREESAME)) {
+ weight_set(p, weight(q)+1);
+ counted++;
+ show_list("bisection 2 count one",
+ counted, nr, list);
+ }
+ else
+ weight_set(p, weight(q));
+
+ /* Does it happen to be at exactly half-way? */
+ if (!find_all && halfway(p, nr))
+ return p;
+ }
+ }
+
+ show_list("bisection 2 counted all", counted, nr, list);
+
+ if (!find_all)
+ return best_bisection(list, nr);
+ else
+ return best_bisection_sorted(list, nr);
+}
+
+struct commit_list *find_bisection(struct commit_list *list,
+ int *reaches, int *all,
+ int find_all)
+{
+ int nr, on_list;
+ struct commit_list *p, *best, *next, *last;
+ int *weights;
+
+ show_list("bisection 2 entry", 0, 0, list);
+
+ /*
+ * Count the number of total and tree-changing items on the
+ * list, while reversing the list.
+ */
+ for (nr = on_list = 0, last = NULL, p = list;
+ p;
+ p = next) {
+ unsigned flags = p->item->object.flags;
+
+ next = p->next;
+ if (flags & UNINTERESTING)
+ continue;
+ p->next = last;
+ last = p;
+ if (!(flags & TREESAME))
+ nr++;
+ on_list++;
+ }
+ list = last;
+ show_list("bisection 2 sorted", 0, nr, list);
+
+ *all = nr;
+ weights = xcalloc(on_list, sizeof(*weights));
+
+ /* Do the real work of finding bisection commit. */
+ best = do_find_bisection(list, nr, weights, find_all);
+ if (best) {
+ if (!find_all)
+ best->next = NULL;
+ *reaches = weight(best);
+ }
+ free(weights);
+ return best;
+}
+
+static int register_ref(const char *refname, const unsigned char *sha1,
+ int flags, void *cb_data)
+{
+ if (!strcmp(refname, "bad")) {
+ ALLOC_GROW(rev_argv, rev_argv_nr + 1, rev_argv_alloc);
+ rev_argv[rev_argv_nr++] = xstrdup(sha1_to_hex(sha1));
+ } else if (!prefixcmp(refname, "good-")) {
+ const char *hex = sha1_to_hex(sha1);
+ char *good = xmalloc(strlen(hex) + 2);
+ *good = '^';
+ memcpy(good + 1, hex, strlen(hex) + 1);
+ ALLOC_GROW(rev_argv, rev_argv_nr + 1, rev_argv_alloc);
+ rev_argv[rev_argv_nr++] = good;
+ } else if (!prefixcmp(refname, "skip-")) {
+ ALLOC_GROW(skipped_sha1, skipped_sha1_nr + 1,
+ skipped_sha1_alloc);
+ hashcpy(skipped_sha1[skipped_sha1_nr++], sha1);
+ }
+
+ return 0;
+}
+
+static int read_bisect_refs(void)
+{
+ return for_each_ref_in("refs/bisect/", register_ref, NULL);
+}
+
+void read_bisect_paths(void)
+{
+ struct strbuf str = STRBUF_INIT;
+ const char *filename = git_path("BISECT_NAMES");
+ FILE *fp = fopen(filename, "r");
+
+ if (!fp)
+ die("Could not open file '%s': %s", filename, strerror(errno));
+
+ while (strbuf_getline(&str, fp, '\n') != EOF) {
+ char *quoted;
+ int res;
+
+ strbuf_trim(&str);
+ quoted = strbuf_detach(&str, NULL);
+ res = sq_dequote_to_argv(quoted, &rev_argv,
+ &rev_argv_nr, &rev_argv_alloc);
+ if (res)
+ die("Badly quoted content in file '%s': %s",
+ filename, quoted);
+ }
+
+ strbuf_release(&str);
+ fclose(fp);
+}
+
+static int skipcmp(const void *a, const void *b)
+{
+ return hashcmp(a, b);
+}
+
+static void prepare_skipped(void)
+{
+ qsort(skipped_sha1, skipped_sha1_nr, sizeof(*skipped_sha1), skipcmp);
+}
+
+static const unsigned char *skipped_sha1_access(size_t index, void *table)
+{
+ unsigned char (*skipped)[20] = table;
+ return skipped[index];
+}
+
+static int lookup_skipped(unsigned char *sha1)
+{
+ return sha1_pos(sha1, skipped_sha1, skipped_sha1_nr,
+ skipped_sha1_access);
+}
+
+struct commit_list *filter_skipped(struct commit_list *list,
+ struct commit_list **tried,
+ int show_all)
+{
+ struct commit_list *filtered = NULL, **f = &filtered;
+
+ *tried = NULL;
+
+ if (!skipped_sha1_nr)
+ return list;
+
+ prepare_skipped();
+
+ while (list) {
+ struct commit_list *next = list->next;
+ list->next = NULL;
+ if (0 <= lookup_skipped(list->item->object.sha1)) {
+ /* Move current to tried list */
+ *tried = list;
+ tried = &list->next;
+ } else {
+ if (!show_all)
+ return list;
+ /* Move current to filtered list */
+ *f = list;
+ f = &list->next;
+ }
+ list = next;
+ }
+
+ return filtered;
+}
+
+static void bisect_rev_setup(struct rev_info *revs, const char *prefix)
+{
+ init_revisions(revs, prefix);
+ revs->abbrev = 0;
+ revs->commit_format = CMIT_FMT_UNSPECIFIED;
+
+ /* argv[0] will be ignored by setup_revisions */
+ ALLOC_GROW(rev_argv, rev_argv_nr + 1, rev_argv_alloc);
+ rev_argv[rev_argv_nr++] = xstrdup("bisect_rev_setup");
+
+ if (read_bisect_refs())
+ die("reading bisect refs failed");
+
+ ALLOC_GROW(rev_argv, rev_argv_nr + 1, rev_argv_alloc);
+ rev_argv[rev_argv_nr++] = xstrdup("--");
+
+ read_bisect_paths();
+
+ ALLOC_GROW(rev_argv, rev_argv_nr + 1, rev_argv_alloc);
+ rev_argv[rev_argv_nr++] = NULL;
+
+ setup_revisions(rev_argv_nr, rev_argv, revs, NULL);
+
+ revs->limited = 1;
+}
+
+int bisect_next_vars(const char *prefix)
+{
+ struct rev_info revs;
+ struct rev_list_info info;
+ int reaches = 0, all = 0;
+
+ memset(&info, 0, sizeof(info));
+ info.revs = &revs;
+ info.bisect_show_flags = BISECT_SHOW_TRIED | BISECT_SHOW_STRINGED;
+
+ bisect_rev_setup(&revs, prefix);
+
+ if (prepare_revision_walk(&revs))
+ die("revision walk setup failed");
+ if (revs.tree_objects)
+ mark_edges_uninteresting(revs.commits, &revs, NULL);
+
+ revs.commits = find_bisection(revs.commits, &reaches, &all,
+ !!skipped_sha1_nr);
+
+ return show_bisect_vars(&info, reaches, all);
+}
--- /dev/null
+#ifndef BISECT_H
+#define BISECT_H
+
+extern struct commit_list *find_bisection(struct commit_list *list,
+ int *reaches, int *all,
+ int find_all);
+
+extern struct commit_list *filter_skipped(struct commit_list *list,
+ struct commit_list **tried,
+ int show_all);
+
+/* bisect_show_flags flags in struct rev_list_info */
+#define BISECT_SHOW_ALL (1<<0)
+#define BISECT_SHOW_TRIED (1<<1)
+#define BISECT_SHOW_STRINGED (1<<2)
+
+struct rev_list_info {
+ struct rev_info *revs;
+ int bisect_show_flags;
+ int show_timestamp;
+ int hdr_termination;
+ const char *header_prefix;
+};
+
+extern int show_bisect_vars(struct rev_list_info *info, int reaches, int all);
+
+extern int bisect_next_vars(const char *prefix);
+
+#endif
--- /dev/null
+#include "builtin.h"
+#include "cache.h"
+#include "parse-options.h"
+#include "bisect.h"
+
+static const char * const git_bisect_helper_usage[] = {
+ "git bisect--helper --next-vars",
+ NULL
+};
+
+int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
+{
+ int next_vars = 0;
+ struct option options[] = {
+ OPT_BOOLEAN(0, "next-vars", &next_vars,
+ "output next bisect step variables"),
+ OPT_END()
+ };
+
+ argc = parse_options(argc, argv, options, git_bisect_helper_usage, 0);
+
+ if (!next_vars)
+ usage_with_options(git_bisect_helper_usage, options);
+
+ /* next-vars */
+ return bisect_next_vars(prefix);
+}
#define OBJECT_ADDED (1u<<20)
-static void show_commit(struct commit *commit)
+static void show_commit(struct commit *commit, void *data)
{
add_object_entry(commit->object.sha1, OBJ_COMMIT, NULL, 0);
commit->object.flags |= OBJECT_ADDED;
}
-static void show_object(struct object_array_entry *p)
+static void show_object(struct object_array_entry *p, void *data)
{
add_preferred_base_object(p->name);
add_object_entry(p->item->sha1, p->item->type, p->name, 0);
if (prepare_revision_walk(&revs))
die("revision walk setup failed");
mark_edges_uninteresting(revs.commits, &revs, show_edge);
- traverse_commit_list(&revs, show_commit, show_object);
+ traverse_commit_list(&revs, show_commit, show_object, NULL);
if (keep_unreachable)
add_objects_in_unpacked_packs(&revs);
#include "cache.h"
-#include "refs.h"
-#include "tag.h"
#include "commit.h"
-#include "tree.h"
-#include "blob.h"
-#include "tree-walk.h"
#include "diff.h"
#include "revision.h"
#include "list-objects.h"
#include "builtin.h"
#include "log-tree.h"
#include "graph.h"
-
-/* bits #0-15 in revision.h */
-
-#define COUNTED (1u<<16)
+#include "bisect.h"
static const char rev_list_usage[] =
"git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
" --bisect-all"
;
-static struct rev_info revs;
-
-static int bisect_list;
-static int show_timestamp;
-static int hdr_termination;
-static const char *header_prefix;
-
-static void finish_commit(struct commit *commit);
-static void show_commit(struct commit *commit)
+static void finish_commit(struct commit *commit, void *data);
+static void show_commit(struct commit *commit, void *data)
{
- graph_show_commit(revs.graph);
+ struct rev_list_info *info = data;
+ struct rev_info *revs = info->revs;
+
+ graph_show_commit(revs->graph);
- if (show_timestamp)
+ if (info->show_timestamp)
printf("%lu ", commit->date);
- if (header_prefix)
- fputs(header_prefix, stdout);
+ if (info->header_prefix)
+ fputs(info->header_prefix, stdout);
- if (!revs.graph) {
+ if (!revs->graph) {
if (commit->object.flags & BOUNDARY)
putchar('-');
else if (commit->object.flags & UNINTERESTING)
putchar('^');
- else if (revs.left_right) {
+ else if (revs->left_right) {
if (commit->object.flags & SYMMETRIC_LEFT)
putchar('<');
else
putchar('>');
}
}
- if (revs.abbrev_commit && revs.abbrev)
- fputs(find_unique_abbrev(commit->object.sha1, revs.abbrev),
+ if (revs->abbrev_commit && revs->abbrev)
+ fputs(find_unique_abbrev(commit->object.sha1, revs->abbrev),
stdout);
else
fputs(sha1_to_hex(commit->object.sha1), stdout);
- if (revs.print_parents) {
+ if (revs->print_parents) {
struct commit_list *parents = commit->parents;
while (parents) {
printf(" %s", sha1_to_hex(parents->item->object.sha1));
parents = parents->next;
}
}
- if (revs.children.name) {
+ if (revs->children.name) {
struct commit_list *children;
- children = lookup_decoration(&revs.children, &commit->object);
+ children = lookup_decoration(&revs->children, &commit->object);
while (children) {
printf(" %s", sha1_to_hex(children->item->object.sha1));
children = children->next;
}
}
- show_decorations(&revs, commit);
- if (revs.commit_format == CMIT_FMT_ONELINE)
+ show_decorations(revs, commit);
+ if (revs->commit_format == CMIT_FMT_ONELINE)
putchar(' ');
else
putchar('\n');
- if (revs.verbose_header && commit->buffer) {
+ if (revs->verbose_header && commit->buffer) {
struct strbuf buf = STRBUF_INIT;
- pretty_print_commit(revs.commit_format, commit,
- &buf, revs.abbrev, NULL, NULL,
- revs.date_mode, 0);
- if (revs.graph) {
+ pretty_print_commit(revs->commit_format, commit,
+ &buf, revs->abbrev, NULL, NULL,
+ revs->date_mode, 0);
+ if (revs->graph) {
if (buf.len) {
- if (revs.commit_format != CMIT_FMT_ONELINE)
- graph_show_oneline(revs.graph);
+ if (revs->commit_format != CMIT_FMT_ONELINE)
+ graph_show_oneline(revs->graph);
- graph_show_commit_msg(revs.graph, &buf);
+ graph_show_commit_msg(revs->graph, &buf);
/*
* Add a newline after the commit message.
* format doesn't explicitly end in a newline.)
*/
if (buf.len && buf.buf[buf.len - 1] == '\n')
- graph_show_padding(revs.graph);
+ graph_show_padding(revs->graph);
putchar('\n');
} else {
/*
* the rest of the graph output for this
* commit.
*/
- if (graph_show_remainder(revs.graph))
+ if (graph_show_remainder(revs->graph))
putchar('\n');
}
} else {
if (buf.len)
- printf("%s%c", buf.buf, hdr_termination);
+ printf("%s%c", buf.buf, info->hdr_termination);
}
strbuf_release(&buf);
} else {
- if (graph_show_remainder(revs.graph))
+ if (graph_show_remainder(revs->graph))
putchar('\n');
}
maybe_flush_or_die(stdout, "stdout");
- finish_commit(commit);
+ finish_commit(commit, data);
}
-static void finish_commit(struct commit *commit)
+static void finish_commit(struct commit *commit, void *data)
{
if (commit->parents) {
free_commit_list(commit->parents);
commit->buffer = NULL;
}
-static void finish_object(struct object_array_entry *p)
+static void finish_object(struct object_array_entry *p, void *data)
{
if (p->item->type == OBJ_BLOB && !has_sha1_file(p->item->sha1))
die("missing blob object '%s'", sha1_to_hex(p->item->sha1));
}
-static void show_object(struct object_array_entry *p)
+static void show_object(struct object_array_entry *p, void *data)
{
/* An object with name "foo\n0000000..." can be used to
* confuse downstream "git pack-objects" very badly.
*/
const char *ep = strchr(p->name, '\n');
- finish_object(p);
+ finish_object(p, data);
if (ep) {
printf("%s %.*s\n", sha1_to_hex(p->item->sha1),
(int) (ep - p->name),
printf("-%s\n", sha1_to_hex(commit->object.sha1));
}
-/*
- * This is a truly stupid algorithm, but it's only
- * used for bisection, and we just don't care enough.
- *
- * We care just barely enough to avoid recursing for
- * non-merge entries.
- */
-static int count_distance(struct commit_list *entry)
-{
- int nr = 0;
-
- while (entry) {
- struct commit *commit = entry->item;
- struct commit_list *p;
-
- if (commit->object.flags & (UNINTERESTING | COUNTED))
- break;
- if (!(commit->object.flags & TREESAME))
- nr++;
- commit->object.flags |= COUNTED;
- p = commit->parents;
- entry = p;
- if (p) {
- p = p->next;
- while (p) {
- nr += count_distance(p);
- p = p->next;
- }
- }
- }
-
- return nr;
-}
-
-static void clear_distance(struct commit_list *list)
-{
- while (list) {
- struct commit *commit = list->item;
- commit->object.flags &= ~COUNTED;
- list = list->next;
- }
-}
-
-#define DEBUG_BISECT 0
-
-static inline int weight(struct commit_list *elem)
-{
- return *((int*)(elem->item->util));
-}
-
-static inline void weight_set(struct commit_list *elem, int weight)
-{
- *((int*)(elem->item->util)) = weight;
-}
-
-static int count_interesting_parents(struct commit *commit)
-{
- struct commit_list *p;
- int count;
-
- for (count = 0, p = commit->parents; p; p = p->next) {
- if (p->item->object.flags & UNINTERESTING)
- continue;
- count++;
- }
- return count;
-}
-
-static inline int halfway(struct commit_list *p, int nr)
-{
- /*
- * Don't short-cut something we are not going to return!
- */
- if (p->item->object.flags & TREESAME)
- return 0;
- if (DEBUG_BISECT)
- return 0;
- /*
- * 2 and 3 are halfway of 5.
- * 3 is halfway of 6 but 2 and 4 are not.
- */
- switch (2 * weight(p) - nr) {
- case -1: case 0: case 1:
- return 1;
- default:
- return 0;
- }
-}
-
-#if !DEBUG_BISECT
-#define show_list(a,b,c,d) do { ; } while (0)
-#else
-static void show_list(const char *debug, int counted, int nr,
- struct commit_list *list)
-{
- struct commit_list *p;
-
- fprintf(stderr, "%s (%d/%d)\n", debug, counted, nr);
-
- for (p = list; p; p = p->next) {
- struct commit_list *pp;
- struct commit *commit = p->item;
- unsigned flags = commit->object.flags;
- enum object_type type;
- unsigned long size;
- char *buf = read_sha1_file(commit->object.sha1, &type, &size);
- char *ep, *sp;
-
- fprintf(stderr, "%c%c%c ",
- (flags & TREESAME) ? ' ' : 'T',
- (flags & UNINTERESTING) ? 'U' : ' ',
- (flags & COUNTED) ? 'C' : ' ');
- if (commit->util)
- fprintf(stderr, "%3d", weight(p));
- else
- fprintf(stderr, "---");
- fprintf(stderr, " %.*s", 8, sha1_to_hex(commit->object.sha1));
- for (pp = commit->parents; pp; pp = pp->next)
- fprintf(stderr, " %.*s", 8,
- sha1_to_hex(pp->item->object.sha1));
-
- sp = strstr(buf, "\n\n");
- if (sp) {
- sp += 2;
- for (ep = sp; *ep && *ep != '\n'; ep++)
- ;
- fprintf(stderr, " %.*s", (int)(ep - sp), sp);
- }
- fprintf(stderr, "\n");
- }
-}
-#endif /* DEBUG_BISECT */
-
-static struct commit_list *best_bisection(struct commit_list *list, int nr)
-{
- struct commit_list *p, *best;
- int best_distance = -1;
-
- best = list;
- for (p = list; p; p = p->next) {
- int distance;
- unsigned flags = p->item->object.flags;
-
- if (flags & TREESAME)
- continue;
- distance = weight(p);
- if (nr - distance < distance)
- distance = nr - distance;
- if (distance > best_distance) {
- best = p;
- best_distance = distance;
- }
- }
-
- return best;
-}
-
-struct commit_dist {
- struct commit *commit;
- int distance;
-};
-
-static int compare_commit_dist(const void *a_, const void *b_)
-{
- struct commit_dist *a, *b;
-
- a = (struct commit_dist *)a_;
- 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);
-}
-
-static struct commit_list *best_bisection_sorted(struct commit_list *list, int nr)
-{
- struct commit_list *p;
- struct commit_dist *array = xcalloc(nr, sizeof(*array));
- int cnt, i;
-
- for (p = list, cnt = 0; p; p = p->next) {
- int distance;
- unsigned flags = p->item->object.flags;
-
- if (flags & TREESAME)
- continue;
- distance = weight(p);
- if (nr - distance < distance)
- distance = nr - distance;
- array[cnt].commit = p->item;
- array[cnt].distance = distance;
- cnt++;
- }
- qsort(array, cnt, sizeof(*array), compare_commit_dist);
- for (p = list, i = 0; i < cnt; i++) {
- struct name_decoration *r = xmalloc(sizeof(*r) + 100);
- struct object *obj = &(array[i].commit->object);
-
- sprintf(r->name, "dist=%d", array[i].distance);
- r->next = add_decoration(&name_decoration, obj, r);
- p->item = array[i].commit;
- p = p->next;
- }
- if (p)
- p->next = NULL;
- free(array);
- return list;
-}
-
-/*
- * zero or positive weight is the number of interesting commits it can
- * reach, including itself. Especially, weight = 0 means it does not
- * reach any tree-changing commits (e.g. just above uninteresting one
- * but traversal is with pathspec).
- *
- * weight = -1 means it has one parent and its distance is yet to
- * be computed.
- *
- * weight = -2 means it has more than one parent and its distance is
- * unknown. After running count_distance() first, they will get zero
- * or positive distance.
- */
-static struct commit_list *do_find_bisection(struct commit_list *list,
- int nr, int *weights,
- int find_all)
-{
- int n, counted;
- struct commit_list *p;
-
- counted = 0;
-
- for (n = 0, p = list; p; p = p->next) {
- struct commit *commit = p->item;
- unsigned flags = commit->object.flags;
-
- p->item->util = &weights[n++];
- switch (count_interesting_parents(commit)) {
- case 0:
- if (!(flags & TREESAME)) {
- weight_set(p, 1);
- counted++;
- show_list("bisection 2 count one",
- counted, nr, list);
- }
- /*
- * otherwise, it is known not to reach any
- * tree-changing commit and gets weight 0.
- */
- break;
- case 1:
- weight_set(p, -1);
- break;
- default:
- weight_set(p, -2);
- break;
- }
- }
-
- show_list("bisection 2 initialize", counted, nr, list);
-
- /*
- * If you have only one parent in the resulting set
- * then you can reach one commit more than that parent
- * can reach. So we do not have to run the expensive
- * count_distance() for single strand of pearls.
- *
- * However, if you have more than one parents, you cannot
- * just add their distance and one for yourself, since
- * they usually reach the same ancestor and you would
- * end up counting them twice that way.
- *
- * So we will first count distance of merges the usual
- * way, and then fill the blanks using cheaper algorithm.
- */
- for (p = list; p; p = p->next) {
- if (p->item->object.flags & UNINTERESTING)
- continue;
- if (weight(p) != -2)
- continue;
- weight_set(p, count_distance(p));
- clear_distance(list);
-
- /* Does it happen to be at exactly half-way? */
- if (!find_all && halfway(p, nr))
- return p;
- counted++;
- }
-
- show_list("bisection 2 count_distance", counted, nr, list);
-
- while (counted < nr) {
- for (p = list; p; p = p->next) {
- struct commit_list *q;
- unsigned flags = p->item->object.flags;
-
- if (0 <= weight(p))
- continue;
- for (q = p->item->parents; q; q = q->next) {
- if (q->item->object.flags & UNINTERESTING)
- continue;
- if (0 <= weight(q))
- break;
- }
- if (!q)
- continue;
-
- /*
- * weight for p is unknown but q is known.
- * add one for p itself if p is to be counted,
- * otherwise inherit it from q directly.
- */
- if (!(flags & TREESAME)) {
- weight_set(p, weight(q)+1);
- counted++;
- show_list("bisection 2 count one",
- counted, nr, list);
- }
- else
- weight_set(p, weight(q));
-
- /* Does it happen to be at exactly half-way? */
- if (!find_all && halfway(p, nr))
- return p;
- }
- }
-
- show_list("bisection 2 counted all", counted, nr, list);
-
- if (!find_all)
- return best_bisection(list, nr);
- else
- return best_bisection_sorted(list, nr);
-}
-
-static struct commit_list *find_bisection(struct commit_list *list,
- int *reaches, int *all,
- int find_all)
-{
- int nr, on_list;
- struct commit_list *p, *best, *next, *last;
- int *weights;
-
- show_list("bisection 2 entry", 0, 0, list);
-
- /*
- * Count the number of total and tree-changing items on the
- * list, while reversing the list.
- */
- for (nr = on_list = 0, last = NULL, p = list;
- p;
- p = next) {
- unsigned flags = p->item->object.flags;
-
- next = p->next;
- if (flags & UNINTERESTING)
- continue;
- p->next = last;
- last = p;
- if (!(flags & TREESAME))
- nr++;
- on_list++;
- }
- list = last;
- show_list("bisection 2 sorted", 0, nr, list);
-
- *all = nr;
- weights = xcalloc(on_list, sizeof(*weights));
-
- /* Do the real work of finding bisection commit. */
- best = do_find_bisection(list, nr, weights, find_all);
- if (best) {
- if (!find_all)
- best->next = NULL;
- *reaches = weight(best);
- }
- free(weights);
- return best;
-}
-
static inline int log2i(int n)
{
int log2 = 0;
return (e < 3 * x) ? n : n - 1;
}
+static void show_tried_revs(struct commit_list *tried, int stringed)
+{
+ printf("bisect_tried='");
+ for (;tried; tried = tried->next) {
+ char *format = tried->next ? "%s|" : "%s";
+ printf(format, sha1_to_hex(tried->item->object.sha1));
+ }
+ printf(stringed ? "' &&\n" : "'\n");
+}
+
+int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
+{
+ int cnt, flags = info->bisect_show_flags;
+ char hex[41] = "", *format;
+ struct commit_list *tried;
+ struct rev_info *revs = info->revs;
+
+ if (!revs->commits && !(flags & BISECT_SHOW_TRIED))
+ return 1;
+
+ revs->commits = filter_skipped(revs->commits, &tried, flags & BISECT_SHOW_ALL);
+
+ /*
+ * revs->commits can reach "reaches" commits among
+ * "all" commits. If it is good, then there are
+ * (all-reaches) commits left to be bisected.
+ * On the other hand, if it is bad, then the set
+ * to bisect is "reaches".
+ * A bisect set of size N has (N-1) commits further
+ * to test, as we already know one bad one.
+ */
+ cnt = all - reaches;
+ if (cnt < reaches)
+ cnt = reaches;
+
+ if (revs->commits)
+ strcpy(hex, sha1_to_hex(revs->commits->item->object.sha1));
+
+ if (flags & BISECT_SHOW_ALL) {
+ traverse_commit_list(revs, show_commit, show_object, info);
+ printf("------\n");
+ }
+
+ if (flags & BISECT_SHOW_TRIED)
+ show_tried_revs(tried, flags & BISECT_SHOW_STRINGED);
+ format = (flags & BISECT_SHOW_STRINGED) ?
+ "bisect_rev=%s &&\n"
+ "bisect_nr=%d &&\n"
+ "bisect_good=%d &&\n"
+ "bisect_bad=%d &&\n"
+ "bisect_all=%d &&\n"
+ "bisect_steps=%d\n"
+ :
+ "bisect_rev=%s\n"
+ "bisect_nr=%d\n"
+ "bisect_good=%d\n"
+ "bisect_bad=%d\n"
+ "bisect_all=%d\n"
+ "bisect_steps=%d\n";
+ printf(format,
+ hex,
+ cnt - 1,
+ all - reaches - 1,
+ reaches - 1,
+ all,
+ estimate_bisect_steps(all));
+
+ return 0;
+}
+
int cmd_rev_list(int argc, const char **argv, const char *prefix)
{
- struct commit_list *list;
+ struct rev_info revs;
+ struct rev_list_info info;
int i;
int read_from_stdin = 0;
+ int bisect_list = 0;
int bisect_show_vars = 0;
int bisect_find_all = 0;
int quiet = 0;
revs.commit_format = CMIT_FMT_UNSPECIFIED;
argc = setup_revisions(argc, argv, &revs, NULL);
+ memset(&info, 0, sizeof(info));
+ info.revs = &revs;
+
quiet = DIFF_OPT_TST(&revs.diffopt, QUIET);
for (i = 1 ; i < argc; i++) {
const char *arg = argv[i];
continue;
}
if (!strcmp(arg, "--timestamp")) {
- show_timestamp = 1;
+ info.show_timestamp = 1;
continue;
}
if (!strcmp(arg, "--bisect")) {
if (!strcmp(arg, "--bisect-all")) {
bisect_list = 1;
bisect_find_all = 1;
+ info.bisect_show_flags = BISECT_SHOW_ALL;
revs.show_decorations = 1;
continue;
}
}
if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
/* The command line has a --pretty */
- hdr_termination = '\n';
+ info.hdr_termination = '\n';
if (revs.commit_format == CMIT_FMT_ONELINE)
- header_prefix = "";
+ info.header_prefix = "";
else
- header_prefix = "commit ";
+ info.header_prefix = "commit ";
}
else if (revs.verbose_header)
/* Only --header was specified */
revs.commit_format = CMIT_FMT_RAW;
- list = revs.commits;
-
- if ((!list &&
+ if ((!revs.commits &&
(!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
!revs.pending.nr)) ||
revs.diff)
revs.commits = find_bisection(revs.commits, &reaches, &all,
bisect_find_all);
- if (bisect_show_vars) {
- int cnt;
- char hex[41];
- if (!revs.commits)
- return 1;
- /*
- * revs.commits can reach "reaches" commits among
- * "all" commits. If it is good, then there are
- * (all-reaches) commits left to be bisected.
- * On the other hand, if it is bad, then the set
- * to bisect is "reaches".
- * A bisect set of size N has (N-1) commits further
- * to test, as we already know one bad one.
- */
- cnt = all - reaches;
- if (cnt < reaches)
- cnt = reaches;
- strcpy(hex, sha1_to_hex(revs.commits->item->object.sha1));
-
- if (bisect_find_all) {
- traverse_commit_list(&revs, show_commit, show_object);
- printf("------\n");
- }
- printf("bisect_rev=%s\n"
- "bisect_nr=%d\n"
- "bisect_good=%d\n"
- "bisect_bad=%d\n"
- "bisect_all=%d\n"
- "bisect_steps=%d\n",
- hex,
- cnt - 1,
- all - reaches - 1,
- reaches - 1,
- all,
- estimate_bisect_steps(all));
- return 0;
- }
+ if (bisect_show_vars)
+ return show_bisect_vars(&info, reaches, all);
}
traverse_commit_list(&revs,
- quiet ? finish_commit : show_commit,
- quiet ? finish_object : show_object);
+ quiet ? finish_commit : show_commit,
+ quiet ? finish_object : show_object,
+ &info);
return 0;
}
extern int cmd_annotate(int argc, const char **argv, const char *prefix);
extern int cmd_apply(int argc, const char **argv, const char *prefix);
extern int cmd_archive(int argc, const char **argv, const char *prefix);
+extern int cmd_bisect__helper(int argc, const char **argv, const char *prefix);
extern int cmd_blame(int argc, const char **argv, const char *prefix);
extern int cmd_branch(int argc, const char **argv, const char *prefix);
extern int cmd_bundle(int argc, const char **argv, const char *prefix);
bisect_next_check && bisect_next || :
}
-filter_skipped() {
- _eval="$1"
- _skip="$2"
-
- if [ -z "$_skip" ]; then
- eval "$_eval" | {
- while read line
- do
- echo "$line &&"
- done
- echo ':'
- }
- return
- fi
-
- # Let's parse the output of:
- # "git rev-list --bisect-vars --bisect-all ..."
- eval "$_eval" | {
- VARS= FOUND= TRIED=
- while read hash line
- do
- case "$VARS,$FOUND,$TRIED,$hash" in
- 1,*,*,*)
- # "bisect_foo=bar" read from rev-list output.
- echo "$hash &&"
- ;;
- ,*,*,---*)
- # Separator
- ;;
- ,,,bisect_rev*)
- # We had nothing to search.
- echo "bisect_rev= &&"
- VARS=1
- ;;
- ,,*,bisect_rev*)
- # We did not find a good bisect rev.
- # This should happen only if the "bad"
- # commit is also a "skip" commit.
- echo "bisect_rev='$TRIED' &&"
- VARS=1
- ;;
- ,,*,*)
- # We are searching.
- TRIED="${TRIED:+$TRIED|}$hash"
- case "$_skip" in
- *$hash*) ;;
- *)
- echo "bisect_rev=$hash &&"
- echo "bisect_tried='$TRIED' &&"
- FOUND=1
- ;;
- esac
- ;;
- ,1,*,bisect_rev*)
- # We have already found a rev to be tested.
- VARS=1
- ;;
- ,1,*,*)
- ;;
- *)
- # Unexpected input
- echo "die 'filter_skipped error'"
- die "filter_skipped error " \
- "VARS: '$VARS' " \
- "FOUND: '$FOUND' " \
- "TRIED: '$TRIED' " \
- "hash: '$hash' " \
- "line: '$line'"
- ;;
- esac
- done
- echo ':'
- }
-}
-
exit_if_skipped_commits () {
_tried=$1
- if expr "$_tried" : ".*[|].*" > /dev/null ; then
+ _bad=$2
+ if test -n "$_tried" ; then
echo "There are only 'skip'ped commit left to test."
echo "The first bad commit could be any of:"
echo "$_tried" | tr '[|]' '[\012]'
+ test -n "$_bad" && echo "$_bad"
echo "We cannot bisect more!"
exit 2
fi
test "$?" -eq "1" && return
# Get bisection information
- BISECT_OPT=''
- test -n "$skip" && BISECT_OPT='--bisect-all'
- eval="git rev-list --bisect-vars $BISECT_OPT $good $bad --" &&
- eval="$eval $(cat "$GIT_DIR/BISECT_NAMES")" &&
- eval=$(filter_skipped "$eval" "$skip") &&
+ eval=$(eval "git bisect--helper --next-vars") &&
eval "$eval" || exit
if [ -z "$bisect_rev" ]; then
+ # We should exit here only if the "bad"
+ # commit is also a "skip" commit (see above).
+ exit_if_skipped_commits "$bisect_tried"
echo "$bad was both good and bad"
exit 1
fi
if [ "$bisect_rev" = "$bad" ]; then
- exit_if_skipped_commits "$bisect_tried"
+ exit_if_skipped_commits "$bisect_tried" "$bad"
echo "$bisect_rev is first bad commit"
git diff-tree --pretty $bisect_rev
exit 0
fi
- # We should exit here only if the "bad"
- # commit is also a "skip" commit (see above).
- exit_if_skipped_commits "$bisect_rev"
-
bisect_checkout "$bisect_rev" "$bisect_nr revisions left to test after this (roughly $bisect_steps steps)"
}
{ "annotate", cmd_annotate, RUN_SETUP },
{ "apply", cmd_apply },
{ "archive", cmd_archive },
+ { "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE },
{ "blame", cmd_blame, RUN_SETUP },
{ "branch", cmd_branch, RUN_SETUP },
{ "bundle", cmd_bundle },
}
void traverse_commit_list(struct rev_info *revs,
- void (*show_commit)(struct commit *),
- void (*show_object)(struct object_array_entry *))
+ show_commit_fn show_commit,
+ show_object_fn show_object,
+ void *data)
{
int i;
struct commit *commit;
while ((commit = get_revision(revs)) != NULL) {
process_tree(revs, commit->tree, &objects, NULL, "");
- show_commit(commit);
+ show_commit(commit, data);
}
for (i = 0; i < revs->pending.nr; i++) {
struct object_array_entry *pending = revs->pending.objects + i;
sha1_to_hex(obj->sha1), name);
}
for (i = 0; i < objects.nr; i++)
- show_object(&objects.objects[i]);
+ show_object(&objects.objects[i], data);
free(objects.objects);
if (revs->pending.nr) {
free(revs->pending.objects);
#ifndef LIST_OBJECTS_H
#define LIST_OBJECTS_H
-typedef void (*show_commit_fn)(struct commit *);
-typedef void (*show_object_fn)(struct object_array_entry *);
+typedef void (*show_commit_fn)(struct commit *, void *);
+typedef void (*show_object_fn)(struct object_array_entry *, void *);
typedef void (*show_edge_fn)(struct commit *);
-void traverse_commit_list(struct rev_info *revs, show_commit_fn, show_object_fn);
+void traverse_commit_list(struct rev_info *, show_commit_fn, show_object_fn, void *);
void mark_edges_uninteresting(struct commit_list *, struct rev_info *, show_edge_fn);
#include "cache.h"
#include "diff.h"
#include "commit.h"
+#include "sha1-lookup.h"
#include "patch-ids.h"
static int commit_patch_id(struct commit *commit, struct diff_options *options,
return diff_flush_patch_id(options, sha1);
}
-static uint32_t take2(const unsigned char *id)
+static const unsigned char *patch_id_access(size_t index, void *table)
{
- return ((id[0] << 8) | id[1]);
+ struct patch_id **id_table = table;
+ return id_table[index]->patch_id;
}
-/*
- * Conventional binary search loop looks like this:
- *
- * do {
- * int mi = (lo + hi) / 2;
- * int cmp = "entry pointed at by mi" minus "target";
- * if (!cmp)
- * return (mi is the wanted one)
- * if (cmp > 0)
- * hi = mi; "mi is larger than target"
- * else
- * lo = mi+1; "mi is smaller than target"
- * } while (lo < hi);
- *
- * The invariants are:
- *
- * - When entering the loop, lo points at a slot that is never
- * above the target (it could be at the target), hi points at a
- * slot that is guaranteed to be above the target (it can never
- * be at the target).
- *
- * - We find a point 'mi' between lo and hi (mi could be the same
- * as lo, but never can be the same as hi), and check if it hits
- * the target. There are three cases:
- *
- * - if it is a hit, we are happy.
- *
- * - if it is strictly higher than the target, we update hi with
- * it.
- *
- * - if it is strictly lower than the target, we update lo to be
- * one slot after it, because we allow lo to be at the target.
- *
- * When choosing 'mi', we do not have to take the "middle" but
- * anywhere in between lo and hi, as long as lo <= mi < hi is
- * satisfied. When we somehow know that the distance between the
- * target and lo is much shorter than the target and hi, we could
- * pick mi that is much closer to lo than the midway.
- */
static int patch_pos(struct patch_id **table, int nr, const unsigned char *id)
{
- int hi = nr;
- int lo = 0;
- int mi = 0;
-
- if (!nr)
- return -1;
-
- if (nr != 1) {
- unsigned lov, hiv, miv, ofs;
-
- for (ofs = 0; ofs < 18; ofs += 2) {
- lov = take2(table[0]->patch_id + ofs);
- hiv = take2(table[nr-1]->patch_id + ofs);
- miv = take2(id + ofs);
- if (miv < lov)
- return -1;
- if (hiv < miv)
- return -1 - nr;
- if (lov != hiv) {
- /*
- * At this point miv could be equal
- * to hiv (but id could still be higher);
- * the invariant of (mi < hi) should be
- * kept.
- */
- mi = (nr-1) * (miv - lov) / (hiv - lov);
- if (lo <= mi && mi < hi)
- break;
- die("oops");
- }
- }
- if (18 <= ofs)
- die("cannot happen -- lo and hi are identical");
- }
-
- do {
- int cmp;
- cmp = hashcmp(table[mi]->patch_id, id);
- if (!cmp)
- return mi;
- if (cmp > 0)
- hi = mi;
- else
- lo = mi + 1;
- mi = (hi + lo) / 2;
- } while (lo < hi);
- return -lo-1;
+ return sha1_pos(id, table, nr, patch_id_access);
}
#define BUCKET_SIZE 190 /* 190 * 21 = 3990, with slop close enough to 4K */
}
}
-char *sq_dequote(char *arg)
+char *sq_dequote_step(char *arg, char **next)
{
char *dst = arg;
char *src = arg;
switch (*++src) {
case '\0':
*dst = 0;
+ if (next)
+ *next = NULL;
return arg;
case '\\':
c = *++src;
}
/* Fallthrough */
default:
- return NULL;
+ if (!next || !isspace(*src))
+ return NULL;
+ do {
+ c = *++src;
+ } while (isspace(c));
+ *dst = 0;
+ *next = src;
+ return arg;
}
}
}
+char *sq_dequote(char *arg)
+{
+ return sq_dequote_step(arg, NULL);
+}
+
+int sq_dequote_to_argv(char *arg, const char ***argv, int *nr, int *alloc)
+{
+ char *next = arg;
+
+ if (!*arg)
+ return 0;
+ do {
+ char *dequoted = sq_dequote_step(next, &next);
+ if (!dequoted)
+ return -1;
+ ALLOC_GROW(*argv, *nr + 1, *alloc);
+ (*argv)[(*nr)++] = dequoted;
+ } while (next);
+
+ return 0;
+}
+
/* 1 means: quote as octal
* 0 means: quote as octal if (quote_path_fully)
* -1 means: never quote
*/
extern char *sq_dequote(char *);
+/*
+ * Same as the above, but can be used to unwrap many arguments in the
+ * same string separated by space. "next" is changed to point to the
+ * next argument that should be passed as first parameter. When there
+ * is no more argument to be dequoted, "next" is updated to point to NULL.
+ */
+extern char *sq_dequote_step(char *arg, char **next);
+extern int sq_dequote_to_argv(char *arg, const char ***argv, int *nr, int *alloc);
+
extern int unquote_c_style(struct strbuf *, const char *quoted, const char **endp);
extern size_t quote_c_style(const char *name, struct strbuf *, FILE *, int no_dq);
extern void quote_two_c_style(struct strbuf *, const char *, const char *, int);
return do_for_each_ref("refs/", fn, 0, 0, cb_data);
}
+int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data)
+{
+ return do_for_each_ref(prefix, fn, strlen(prefix), 0, cb_data);
+}
+
int for_each_tag_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/tags/", fn, 10, 0, cb_data);
+ return for_each_ref_in("refs/tags/", fn, cb_data);
}
int for_each_branch_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/heads/", fn, 11, 0, cb_data);
+ return for_each_ref_in("refs/heads/", fn, cb_data);
}
int for_each_remote_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/remotes/", fn, 13, 0, cb_data);
+ return for_each_ref_in("refs/remotes/", fn, cb_data);
}
int for_each_rawref(each_ref_fn fn, void *cb_data)
typedef int each_ref_fn(const char *refname, const unsigned char *sha1, int flags, void *cb_data);
extern int head_ref(each_ref_fn, void *);
extern int for_each_ref(each_ref_fn, void *);
+extern int for_each_ref_in(const char *, each_ref_fn, void *);
extern int for_each_tag_ref(each_ref_fn, void *);
extern int for_each_branch_ref(each_ref_fn, void *);
extern int for_each_remote_ref(each_ref_fn, void *);
#include "cache.h"
#include "sha1-lookup.h"
+static uint32_t take2(const unsigned char *sha1)
+{
+ return ((sha1[0] << 8) | sha1[1]);
+}
+
+/*
+ * Conventional binary search loop looks like this:
+ *
+ * do {
+ * int mi = (lo + hi) / 2;
+ * int cmp = "entry pointed at by mi" minus "target";
+ * if (!cmp)
+ * return (mi is the wanted one)
+ * if (cmp > 0)
+ * hi = mi; "mi is larger than target"
+ * else
+ * lo = mi+1; "mi is smaller than target"
+ * } while (lo < hi);
+ *
+ * The invariants are:
+ *
+ * - When entering the loop, lo points at a slot that is never
+ * above the target (it could be at the target), hi points at a
+ * slot that is guaranteed to be above the target (it can never
+ * be at the target).
+ *
+ * - We find a point 'mi' between lo and hi (mi could be the same
+ * as lo, but never can be the same as hi), and check if it hits
+ * the target. There are three cases:
+ *
+ * - if it is a hit, we are happy.
+ *
+ * - if it is strictly higher than the target, we update hi with
+ * it.
+ *
+ * - if it is strictly lower than the target, we update lo to be
+ * one slot after it, because we allow lo to be at the target.
+ *
+ * When choosing 'mi', we do not have to take the "middle" but
+ * anywhere in between lo and hi, as long as lo <= mi < hi is
+ * satisfied. When we somehow know that the distance between the
+ * target and lo is much shorter than the target and hi, we could
+ * pick mi that is much closer to lo than the midway.
+ */
+/*
+ * The table should contain "nr" elements.
+ * The sha1 of element i (between 0 and nr - 1) should be returned
+ * by "fn(i, table)".
+ */
+int sha1_pos(const unsigned char *sha1, void *table, size_t nr,
+ sha1_access_fn fn)
+{
+ size_t hi = nr;
+ size_t lo = 0;
+ size_t mi = 0;
+
+ if (!nr)
+ return -1;
+
+ if (nr != 1) {
+ size_t lov, hiv, miv, ofs;
+
+ for (ofs = 0; ofs < 18; ofs += 2) {
+ lov = take2(fn(0, table) + ofs);
+ hiv = take2(fn(nr - 1, table) + ofs);
+ miv = take2(sha1 + ofs);
+ if (miv < lov)
+ return -1;
+ if (hiv < miv)
+ return -1 - nr;
+ if (lov != hiv) {
+ /*
+ * At this point miv could be equal
+ * to hiv (but sha1 could still be higher);
+ * the invariant of (mi < hi) should be
+ * kept.
+ */
+ mi = (nr - 1) * (miv - lov) / (hiv - lov);
+ if (lo <= mi && mi < hi)
+ break;
+ die("oops");
+ }
+ }
+ if (18 <= ofs)
+ die("cannot happen -- lo and hi are identical");
+ }
+
+ do {
+ int cmp;
+ cmp = hashcmp(fn(mi, table), sha1);
+ if (!cmp)
+ return mi;
+ if (cmp > 0)
+ hi = mi;
+ else
+ lo = mi + 1;
+ mi = (hi + lo) / 2;
+ } while (lo < hi);
+ return -lo-1;
+}
+
/*
* Conventional binary search loop looks like this:
*
#ifndef SHA1_LOOKUP_H
#define SHA1_LOOKUP_H
+typedef const unsigned char *sha1_access_fn(size_t index, void *table);
+
+extern int sha1_pos(const unsigned char *sha1,
+ void *table,
+ size_t nr,
+ sha1_access_fn fn);
+
extern int sha1_entry_pos(const void *table,
size_t elem_size,
size_t key_offset,
unset GIT_TRACE
'
+# This creates another side branch called "parallel" with some files
+# in some directories, to test bisecting with paths.
+#
+# We should have the following:
+#
+# P1-P2-P3-P4-P5-P6-P7
+# / / /
+# H1-H2-H3-H4-H5-H6-H7
+# \ \ \
+# S5-A \
+# \ \
+# S6-S7----B
+#
+test_expect_success '"parallel" side branch creation' '
+ git bisect reset &&
+ git checkout -b parallel $HASH1 &&
+ mkdir dir1 dir2 &&
+ add_line_into_file "1(para): line 1 on parallel branch" dir1/file1 &&
+ PARA_HASH1=$(git rev-parse --verify HEAD) &&
+ add_line_into_file "2(para): line 2 on parallel branch" dir2/file2 &&
+ PARA_HASH2=$(git rev-parse --verify HEAD) &&
+ add_line_into_file "3(para): line 3 on parallel branch" dir2/file3 &&
+ PARA_HASH3=$(git rev-parse --verify HEAD)
+ git merge -m "merge HASH4 and PARA_HASH3" "$HASH4" &&
+ PARA_HASH4=$(git rev-parse --verify HEAD)
+ add_line_into_file "5(para): add line on parallel branch" dir1/file1 &&
+ PARA_HASH5=$(git rev-parse --verify HEAD)
+ add_line_into_file "6(para): add line on parallel branch" dir2/file2 &&
+ PARA_HASH6=$(git rev-parse --verify HEAD)
+ git merge -m "merge HASH7 and PARA_HASH6" "$HASH7" &&
+ PARA_HASH7=$(git rev-parse --verify HEAD)
+'
+
+test_expect_success 'restricting bisection on one dir' '
+ git bisect reset &&
+ git bisect start HEAD $HASH1 -- dir1 &&
+ para1=$(git rev-parse --verify HEAD) &&
+ test "$para1" = "$PARA_HASH1" &&
+ git bisect bad > my_bisect_log.txt &&
+ grep "$PARA_HASH1 is first bad commit" my_bisect_log.txt
+'
+
+test_expect_success 'restricting bisection on one dir and a file' '
+ git bisect reset &&
+ git bisect start HEAD $HASH1 -- dir1 hello &&
+ para4=$(git rev-parse --verify HEAD) &&
+ test "$para4" = "$PARA_HASH4" &&
+ git bisect bad &&
+ hash3=$(git rev-parse --verify HEAD) &&
+ test "$hash3" = "$HASH3" &&
+ git bisect good &&
+ hash4=$(git rev-parse --verify HEAD) &&
+ test "$hash4" = "$HASH4" &&
+ git bisect good &&
+ para1=$(git rev-parse --verify HEAD) &&
+ test "$para1" = "$PARA_HASH1" &&
+ git bisect good > my_bisect_log.txt &&
+ grep "$PARA_HASH4 is first bad commit" my_bisect_log.txt
+'
+
#
#
test_done
}
static FILE *pack_pipe = NULL;
-static void show_commit(struct commit *commit)
+static void show_commit(struct commit *commit, void *data)
{
if (commit->object.flags & BOUNDARY)
fputc('-', pack_pipe);
commit->buffer = NULL;
}
-static void show_object(struct object_array_entry *p)
+static void show_object(struct object_array_entry *p, void *data)
{
/* An object with name "foo\n0000000..." can be used to
* confuse downstream git-pack-objects very badly.
if (prepare_revision_walk(&revs))
die("revision walk setup failed");
mark_edges_uninteresting(revs.commits, &revs, show_edge);
- traverse_commit_list(&revs, show_commit, show_object);
+ traverse_commit_list(&revs, show_commit, show_object, NULL);
fflush(pack_pipe);
fclose(pack_pipe);
return 0;