git/builtin-log.c

/*
 * Builtin "git log" and related commands (show, whatchanged)
 *
 * (C) Copyright 2006 Linus Torvalds
 *		 2006 Junio Hamano
 */
#include "cache.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"
#include "log-tree.h"
#include "builtin.h"

static int cmd_log_wc(int argc, const char **argv, char **envp,
		      struct rev_info *rev)
{
	struct commit *commit;

	rev->abbrev = DEFAULT_ABBREV;
	rev->commit_format = CMIT_FMT_DEFAULT;
	rev->verbose_header = 1;
	argc = setup_revisions(argc, argv, rev, "HEAD");

	if (argc > 1)
		die("unrecognized argument: %s", argv[1]);

	prepare_revision_walk(rev);
	setup_pager();
	while ((commit = get_revision(rev)) != NULL) {
		log_tree_commit(rev, commit);
		free(commit->buffer);
		commit->buffer = NULL;
	}
	return 0;
}

int cmd_whatchanged(int argc, const char **argv, char **envp)
{
	struct rev_info rev;

	init_revisions(&rev);
	rev.diff = 1;
	rev.diffopt.recursive = 1;
	return cmd_log_wc(argc, argv, envp, &rev);
}

int cmd_show(int argc, const char **argv, char **envp)
{
	struct rev_info rev;

	init_revisions(&rev);
	rev.diff = 1;
	rev.diffopt.recursive = 1;
	rev.combine_merges = 1;
	rev.dense_combined_merges = 1;
	rev.always_show_header = 1;
	rev.ignore_merges = 0;
	rev.no_walk = 1;
	return cmd_log_wc(argc, argv, envp, &rev);
}

int cmd_log(int argc, const char **argv, char **envp)
{
	struct rev_info rev;

	init_revisions(&rev);
	rev.always_show_header = 1;
	rev.diffopt.recursive = 1;
	return cmd_log_wc(argc, argv, envp, &rev);
}

static int istitlechar(char c)
{
	return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
		(c >= '0' && c <= '9') || c == '.' || c == '_';
}

static void reopen_stdout(struct commit *commit, int nr)
{
	char filename[1024];
	char *sol;
	int len;


	sprintf(filename, "%04d", nr);
	len = strlen(filename);

	sol = strstr(commit->buffer, "\n\n");
	if (sol) {
		int j, space = 1;

		sol += 2;
		/* strip [PATCH] or [PATCH blabla] */
		if (!strncmp(sol, "[PATCH", 6)) {
			char *eos = strchr(sol + 6, ']');
			if (eos) {
				while (isspace(*eos))
					eos++;
				sol = eos;
			}
		}

		for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
			if (istitlechar(sol[j])) {
				if (space) {
					filename[len++] = '-';
					space = 0;
				}
				filename[len++] = sol[j];
				if (sol[j] == '.')
					while (sol[j + 1] == '.')
						j++;
			} else
				space = 1;
		}
		while (filename[len - 1] == '.' || filename[len - 1] == '-')
			len--;
	}
	strcpy(filename + len, ".txt");
	fprintf(stderr, "%s\n", filename);
	freopen(filename, "w", stdout);
}

int cmd_format_patch(int argc, const char **argv, char **envp)
{
	struct commit *commit;
	struct commit **list = NULL;
	struct rev_info rev;
	int nr = 0, total;
	int use_stdout = 0;

	init_revisions(&rev);
	rev.commit_format = CMIT_FMT_EMAIL;
	rev.verbose_header = 1;
	rev.diff = 1;
	rev.diffopt.with_raw = 0;
	rev.diffopt.with_stat = 1;
	rev.combine_merges = 0;
	rev.ignore_merges = 1;
	rev.diffopt.output_format = DIFF_FORMAT_PATCH;
	argc = setup_revisions(argc, argv, &rev, "HEAD");

	while (argc > 1) {
		if (!strcmp(argv[1], "--stdout"))
			use_stdout = 1;
		else
			die ("unrecognized argument: %s", argv[1]);
		argc--;
		argv++;
	}

	prepare_revision_walk(&rev);
	while ((commit = get_revision(&rev)) != NULL) {
		/* ignore merges */
		if (commit->parents && commit->parents->next)
			continue;
		nr++;
		list = realloc(list, nr * sizeof(list[0]));
		list[nr - 1] = commit;
	}
	total = nr;
	while (0 <= --nr) {
		int shown;
		commit = list[nr];
		if (!use_stdout)
			reopen_stdout(commit, total - nr);
		shown = log_tree_commit(&rev, commit);
		free(commit->buffer);
		commit->buffer = NULL;
		if (shown)
			printf("-- \n%s\n\n", git_version_string);
		if (!use_stdout)
			fclose(stdout);
	}
	free(list);
	return 0;
}