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![Linus Torvalds](/assets/img/avatar_default.png)
Post 1.3.0 "git log" forgets to list parent commits on the first line when --parents is given. git-cvsserver relied on it. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
181 lines
4.5 KiB
C
181 lines
4.5 KiB
C
#include "cache.h"
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#include "diff.h"
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#include "commit.h"
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#include "log-tree.h"
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static void show_parents(struct commit *commit, int abbrev)
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{
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struct commit_list *p;
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for (p = commit->parents; p ; p = p->next) {
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struct commit *parent = p->item;
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printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
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}
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}
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void show_log(struct rev_info *opt, struct log_info *log, const char *sep)
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{
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static char this_header[16384];
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struct commit *commit = log->commit, *parent = log->parent;
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int abbrev = opt->diffopt.abbrev;
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int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
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const char *extra;
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int len;
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opt->loginfo = NULL;
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if (!opt->verbose_header) {
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fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
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if (opt->parents)
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show_parents(commit, abbrev_commit);
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putchar('\n');
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return;
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}
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/*
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* The "oneline" format has several special cases:
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* - The pretty-printed commit lacks a newline at the end
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* of the buffer, but we do want to make sure that we
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* have a newline there. If the separator isn't already
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* a newline, add an extra one.
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* - unlike other log messages, the one-line format does
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* not have an empty line between entries.
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*/
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extra = "";
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if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
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extra = "\n";
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if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
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putchar('\n');
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opt->shown_one = 1;
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/*
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* Print header line of header..
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*/
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printf("%s%s",
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opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
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diff_unique_abbrev(commit->object.sha1, abbrev_commit));
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if (opt->parents)
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show_parents(commit, abbrev_commit);
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if (parent)
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printf(" (from %s)", diff_unique_abbrev(parent->object.sha1, abbrev_commit));
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putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
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/*
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* And then the pretty-printed message itself
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*/
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len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header, sizeof(this_header), abbrev);
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printf("%s%s%s", this_header, extra, sep);
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}
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int log_tree_diff_flush(struct rev_info *opt)
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{
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diffcore_std(&opt->diffopt);
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if (diff_queue_is_empty()) {
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int saved_fmt = opt->diffopt.output_format;
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opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
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diff_flush(&opt->diffopt);
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opt->diffopt.output_format = saved_fmt;
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return 0;
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}
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if (opt->loginfo && !opt->no_commit_id)
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show_log(opt, opt->loginfo, opt->diffopt.with_stat ? "---\n" : "\n");
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diff_flush(&opt->diffopt);
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return 1;
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}
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static int diff_root_tree(struct rev_info *opt,
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const unsigned char *new, const char *base)
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{
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int retval;
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void *tree;
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struct tree_desc empty, real;
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tree = read_object_with_reference(new, tree_type, &real.size, NULL);
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if (!tree)
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die("unable to read root tree (%s)", sha1_to_hex(new));
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real.buf = tree;
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empty.buf = "";
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empty.size = 0;
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retval = diff_tree(&empty, &real, base, &opt->diffopt);
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free(tree);
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log_tree_diff_flush(opt);
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return retval;
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}
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static int do_diff_combined(struct rev_info *opt, struct commit *commit)
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{
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unsigned const char *sha1 = commit->object.sha1;
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diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
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return !opt->loginfo;
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}
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/*
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* Show the diff of a commit.
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*
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* Return true if we printed any log info messages
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*/
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static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
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{
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int showed_log;
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struct commit_list *parents;
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unsigned const char *sha1 = commit->object.sha1;
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if (!opt->diff)
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return 0;
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/* Root commit? */
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parents = commit->parents;
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if (!parents) {
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if (opt->show_root_diff)
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diff_root_tree(opt, sha1, "");
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return !opt->loginfo;
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}
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/* More than one parent? */
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if (parents && parents->next) {
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if (opt->ignore_merges)
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return 0;
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else if (opt->combine_merges)
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return do_diff_combined(opt, commit);
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/* If we show individual diffs, show the parent info */
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log->parent = parents->item;
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}
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showed_log = 0;
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for (;;) {
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struct commit *parent = parents->item;
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diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
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log_tree_diff_flush(opt);
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showed_log |= !opt->loginfo;
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/* Set up the log info for the next parent, if any.. */
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parents = parents->next;
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if (!parents)
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break;
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log->parent = parents->item;
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opt->loginfo = log;
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}
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return showed_log;
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}
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int log_tree_commit(struct rev_info *opt, struct commit *commit)
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{
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struct log_info log;
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log.commit = commit;
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log.parent = NULL;
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opt->loginfo = &log;
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if (!log_tree_diff(opt, commit, &log) && opt->loginfo && opt->always_show_header) {
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log.parent = NULL;
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show_log(opt, opt->loginfo, "");
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}
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opt->loginfo = NULL;
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return 0;
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}
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