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