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![Christian Couder](/assets/img/avatar_default.png)
because we will need to get more information from this function in some later patches. The new "int *count" parameter gives the number of commits left after the skipped commit have been filtered out. The new "int *skipped_first" parameter tells us if the first commit in the list has been skipped. Note that using this parameter also changes the behavior of the function if the first commit is indeed skipped. Because we assume that in this case we will want all the filtered commits, not just the first one, even if "show_all" is not set. So using a not NULL "skipped_first" parameter really means that we plan to choose to test another commit than the first non skipped one if the first commit in the list is skipped. That in turn means that, in case the first commit is skipped, we have to return a fully filtered list. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
405 lines
9.5 KiB
C
405 lines
9.5 KiB
C
#include "cache.h"
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#include "commit.h"
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#include "diff.h"
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#include "revision.h"
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#include "list-objects.h"
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#include "builtin.h"
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#include "log-tree.h"
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#include "graph.h"
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#include "bisect.h"
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static const char rev_list_usage[] =
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"git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
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" limiting output:\n"
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" --max-count=nr\n"
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" --max-age=epoch\n"
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" --min-age=epoch\n"
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" --sparse\n"
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" --no-merges\n"
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" --remove-empty\n"
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" --all\n"
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" --branches\n"
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" --tags\n"
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" --remotes\n"
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" --stdin\n"
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" --quiet\n"
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" ordering output:\n"
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" --topo-order\n"
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" --date-order\n"
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" --reverse\n"
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" formatting output:\n"
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" --parents\n"
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" --children\n"
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" --objects | --objects-edge\n"
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" --unpacked\n"
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" --header | --pretty\n"
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" --abbrev=nr | --no-abbrev\n"
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" --abbrev-commit\n"
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" --left-right\n"
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" special purpose:\n"
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" --bisect\n"
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" --bisect-vars\n"
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" --bisect-all"
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;
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static void finish_commit(struct commit *commit, void *data);
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static void show_commit(struct commit *commit, void *data)
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{
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struct rev_list_info *info = data;
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struct rev_info *revs = info->revs;
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graph_show_commit(revs->graph);
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if (info->show_timestamp)
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printf("%lu ", commit->date);
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if (info->header_prefix)
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fputs(info->header_prefix, stdout);
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if (!revs->graph) {
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if (commit->object.flags & BOUNDARY)
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putchar('-');
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else if (commit->object.flags & UNINTERESTING)
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putchar('^');
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else if (revs->left_right) {
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if (commit->object.flags & SYMMETRIC_LEFT)
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putchar('<');
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else
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putchar('>');
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}
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}
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if (revs->abbrev_commit && revs->abbrev)
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fputs(find_unique_abbrev(commit->object.sha1, revs->abbrev),
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stdout);
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else
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fputs(sha1_to_hex(commit->object.sha1), stdout);
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if (revs->print_parents) {
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struct commit_list *parents = commit->parents;
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while (parents) {
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printf(" %s", sha1_to_hex(parents->item->object.sha1));
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parents = parents->next;
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}
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}
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if (revs->children.name) {
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struct commit_list *children;
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children = lookup_decoration(&revs->children, &commit->object);
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while (children) {
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printf(" %s", sha1_to_hex(children->item->object.sha1));
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children = children->next;
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}
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}
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show_decorations(revs, commit);
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if (revs->commit_format == CMIT_FMT_ONELINE)
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putchar(' ');
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else
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putchar('\n');
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if (revs->verbose_header && commit->buffer) {
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struct strbuf buf = STRBUF_INIT;
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pretty_print_commit(revs->commit_format, commit,
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&buf, revs->abbrev, NULL, NULL,
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revs->date_mode, 0);
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if (revs->graph) {
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if (buf.len) {
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if (revs->commit_format != CMIT_FMT_ONELINE)
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graph_show_oneline(revs->graph);
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graph_show_commit_msg(revs->graph, &buf);
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/*
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* Add a newline after the commit message.
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*
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* Usually, this newline produces a blank
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* padding line between entries, in which case
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* we need to add graph padding on this line.
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*
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* However, the commit message may not end in a
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* newline. In this case the newline simply
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* ends the last line of the commit message,
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* and we don't need any graph output. (This
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* always happens with CMIT_FMT_ONELINE, and it
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* happens with CMIT_FMT_USERFORMAT when the
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* format doesn't explicitly end in a newline.)
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*/
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if (buf.len && buf.buf[buf.len - 1] == '\n')
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graph_show_padding(revs->graph);
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putchar('\n');
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} else {
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/*
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* If the message buffer is empty, just show
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* the rest of the graph output for this
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* commit.
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*/
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if (graph_show_remainder(revs->graph))
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putchar('\n');
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}
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} else {
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if (buf.len)
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printf("%s%c", buf.buf, info->hdr_termination);
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}
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strbuf_release(&buf);
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} else {
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if (graph_show_remainder(revs->graph))
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putchar('\n');
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}
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maybe_flush_or_die(stdout, "stdout");
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finish_commit(commit, data);
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}
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static void finish_commit(struct commit *commit, void *data)
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{
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if (commit->parents) {
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free_commit_list(commit->parents);
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commit->parents = NULL;
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}
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free(commit->buffer);
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commit->buffer = NULL;
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}
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static void finish_object(struct object *obj, const struct name_path *path, const char *name)
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{
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if (obj->type == OBJ_BLOB && !has_sha1_file(obj->sha1))
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die("missing blob object '%s'", sha1_to_hex(obj->sha1));
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}
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static void show_object(struct object *obj, const struct name_path *path, const char *component)
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{
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char *name = path_name(path, component);
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/* An object with name "foo\n0000000..." can be used to
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* confuse downstream "git pack-objects" very badly.
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*/
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const char *ep = strchr(name, '\n');
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finish_object(obj, path, name);
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if (ep) {
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printf("%s %.*s\n", sha1_to_hex(obj->sha1),
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(int) (ep - name),
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name);
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}
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else
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printf("%s %s\n", sha1_to_hex(obj->sha1), name);
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free(name);
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}
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static void show_edge(struct commit *commit)
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{
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printf("-%s\n", sha1_to_hex(commit->object.sha1));
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}
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static inline int log2i(int n)
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{
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int log2 = 0;
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for (; n > 1; n >>= 1)
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log2++;
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return log2;
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}
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static inline int exp2i(int n)
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{
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return 1 << n;
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}
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/*
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* Estimate the number of bisect steps left (after the current step)
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*
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* For any x between 0 included and 2^n excluded, the probability for
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* n - 1 steps left looks like:
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*
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* P(2^n + x) == (2^n - x) / (2^n + x)
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*
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* and P(2^n + x) < 0.5 means 2^n < 3x
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*/
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int estimate_bisect_steps(int all)
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{
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int n, x, e;
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if (all < 3)
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return 0;
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n = log2i(all);
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e = exp2i(n);
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x = all - e;
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return (e < 3 * x) ? n : n - 1;
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}
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void print_commit_list(struct commit_list *list,
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const char *format_cur,
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const char *format_last)
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{
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for ( ; list; list = list->next) {
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const char *format = list->next ? format_cur : format_last;
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printf(format, sha1_to_hex(list->item->object.sha1));
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}
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}
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static void show_tried_revs(struct commit_list *tried)
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{
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printf("bisect_tried='");
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print_commit_list(tried, "%s|", "%s");
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printf("'\n");
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}
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static void print_var_str(const char *var, const char *val)
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{
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printf("%s='%s'\n", var, val);
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}
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static void print_var_int(const char *var, int val)
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{
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printf("%s=%d\n", var, val);
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}
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int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
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{
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int cnt, flags = info->bisect_show_flags;
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char hex[41] = "";
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struct commit_list *tried;
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struct rev_info *revs = info->revs;
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if (!revs->commits && !(flags & BISECT_SHOW_TRIED))
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return 1;
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revs->commits = filter_skipped(revs->commits, &tried,
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flags & BISECT_SHOW_ALL,
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NULL, NULL);
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/*
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* revs->commits can reach "reaches" commits among
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* "all" commits. If it is good, then there are
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* (all-reaches) commits left to be bisected.
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* On the other hand, if it is bad, then the set
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* to bisect is "reaches".
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* A bisect set of size N has (N-1) commits further
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* to test, as we already know one bad one.
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*/
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cnt = all - reaches;
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if (cnt < reaches)
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cnt = reaches;
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if (revs->commits)
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strcpy(hex, sha1_to_hex(revs->commits->item->object.sha1));
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if (flags & BISECT_SHOW_ALL) {
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traverse_commit_list(revs, show_commit, show_object, info);
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printf("------\n");
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}
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if (flags & BISECT_SHOW_TRIED)
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show_tried_revs(tried);
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print_var_str("bisect_rev", hex);
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print_var_int("bisect_nr", cnt - 1);
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print_var_int("bisect_good", all - reaches - 1);
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print_var_int("bisect_bad", reaches - 1);
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print_var_int("bisect_all", all);
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print_var_int("bisect_steps", estimate_bisect_steps(all));
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return 0;
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}
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int cmd_rev_list(int argc, const char **argv, const char *prefix)
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{
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struct rev_info revs;
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struct rev_list_info info;
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int i;
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int read_from_stdin = 0;
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int bisect_list = 0;
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int bisect_show_vars = 0;
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int bisect_find_all = 0;
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int quiet = 0;
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git_config(git_default_config, NULL);
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init_revisions(&revs, prefix);
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revs.abbrev = 0;
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revs.commit_format = CMIT_FMT_UNSPECIFIED;
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argc = setup_revisions(argc, argv, &revs, NULL);
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memset(&info, 0, sizeof(info));
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info.revs = &revs;
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quiet = DIFF_OPT_TST(&revs.diffopt, QUIET);
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for (i = 1 ; i < argc; i++) {
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const char *arg = argv[i];
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if (!strcmp(arg, "--header")) {
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revs.verbose_header = 1;
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continue;
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}
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if (!strcmp(arg, "--timestamp")) {
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info.show_timestamp = 1;
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continue;
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}
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if (!strcmp(arg, "--bisect")) {
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bisect_list = 1;
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continue;
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}
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if (!strcmp(arg, "--bisect-all")) {
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bisect_list = 1;
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bisect_find_all = 1;
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info.bisect_show_flags = BISECT_SHOW_ALL;
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revs.show_decorations = 1;
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continue;
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}
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if (!strcmp(arg, "--bisect-vars")) {
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bisect_list = 1;
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bisect_show_vars = 1;
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continue;
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}
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if (!strcmp(arg, "--stdin")) {
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if (read_from_stdin++)
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die("--stdin given twice?");
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read_revisions_from_stdin(&revs);
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continue;
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}
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usage(rev_list_usage);
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}
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if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
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/* The command line has a --pretty */
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info.hdr_termination = '\n';
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if (revs.commit_format == CMIT_FMT_ONELINE)
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info.header_prefix = "";
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else
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info.header_prefix = "commit ";
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}
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else if (revs.verbose_header)
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/* Only --header was specified */
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revs.commit_format = CMIT_FMT_RAW;
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if ((!revs.commits &&
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(!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
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!revs.pending.nr)) ||
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revs.diff)
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usage(rev_list_usage);
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save_commit_buffer = revs.verbose_header ||
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revs.grep_filter.pattern_list;
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if (bisect_list)
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revs.limited = 1;
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if (prepare_revision_walk(&revs))
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die("revision walk setup failed");
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if (revs.tree_objects)
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mark_edges_uninteresting(revs.commits, &revs, show_edge);
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if (bisect_list) {
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int reaches = reaches, all = all;
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revs.commits = find_bisection(revs.commits, &reaches, &all,
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bisect_find_all);
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if (bisect_show_vars)
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return show_bisect_vars(&info, reaches, all);
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}
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traverse_commit_list(&revs,
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quiet ? finish_commit : show_commit,
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quiet ? finish_object : show_object,
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&info);
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return 0;
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}
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