1 files changed, 535 insertions, 0 deletions

diff --git a/log-tree.c b/log-tree.c
new file mode 100644
index 000000000..194ddb13d
--- /dev/null
+++ b/log-tree.c
@@ -0,0 +1,535 @@
+#include "cache.h"
+#include "diff.h"
+#include "commit.h"
+#include "tag.h"
+#include "graph.h"
+#include "log-tree.h"
+#include "reflog-walk.h"
+#include "refs.h"
+
+struct decoration name_decoration = { "object names" };
+
+static void add_name_decoration(const char *prefix, const char *name, struct object *obj)
+{
+	int plen = strlen(prefix);
+	int nlen = strlen(name);
+	struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + plen + nlen);
+	memcpy(res->name, prefix, plen);
+	memcpy(res->name + plen, name, nlen + 1);
+	res->next = add_decoration(&name_decoration, obj, res);
+}
+
+static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
+{
+	struct object *obj = parse_object(sha1);
+	if (!obj)
+		return 0;
+	add_name_decoration("", refname, obj);
+	while (obj->type == OBJ_TAG) {
+		obj = ((struct tag *)obj)->tagged;
+		if (!obj)
+			break;
+		add_name_decoration("tag: ", refname, obj);
+	}
+	return 0;
+}
+
+void load_ref_decorations(void)
+{
+	static int loaded;
+	if (!loaded) {
+		loaded = 1;
+		for_each_ref(add_ref_decoration, NULL);
+	}
+}
+
+static void show_parents(struct commit *commit, int abbrev)
+{
+	struct commit_list *p;
+	for (p = commit->parents; p ; p = p->next) {
+		struct commit *parent = p->item;
+		printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
+	}
+}
+
+void show_decorations(struct rev_info *opt, struct commit *commit)
+{
+	const char *prefix;
+	struct name_decoration *decoration;
+
+	if (opt->show_source && commit->util)
+		printf("\t%s", (char *) commit->util);
+	if (!opt->show_decorations)
+		return;
+	decoration = lookup_decoration(&name_decoration, &commit->object);
+	if (!decoration)
+		return;
+	prefix = " (";
+	while (decoration) {
+		printf("%s%s", prefix, decoration->name);
+		prefix = ", ";
+		decoration = decoration->next;
+	}
+	putchar(')');
+}
+
+/*
+ * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
+ * Signed-off-by: and Acked-by: lines.
+ */
+static int detect_any_signoff(char *letter, int size)
+{
+	char ch, *cp;
+	int seen_colon = 0;
+	int seen_at = 0;
+	int seen_name = 0;
+	int seen_head = 0;
+
+	cp = letter + size;
+	while (letter <= --cp && (ch = *cp) == '\n')
+		continue;
+
+	while (letter <= cp) {
+		ch = *cp--;
+		if (ch == '\n')
+			break;
+
+		if (!seen_at) {
+			if (ch == '@')
+				seen_at = 1;
+			continue;
+		}
+		if (!seen_colon) {
+			if (ch == '@')
+				return 0;
+			else if (ch == ':')
+				seen_colon = 1;
+			else
+				seen_name = 1;
+			continue;
+		}
+		if (('A' <= ch && ch <= 'Z') ||
+		    ('a' <= ch && ch <= 'z') ||
+		    ch == '-') {
+			seen_head = 1;
+			continue;
+		}
+		/* no empty last line doesn't match */
+		return 0;
+	}
+	return seen_head && seen_name;
+}
+
+static void append_signoff(struct strbuf *sb, const char *signoff)
+{
+	static const char signed_off_by[] = "Signed-off-by: ";
+	size_t signoff_len = strlen(signoff);
+	int has_signoff = 0;
+	char *cp;
+
+	cp = sb->buf;
+
+	/* First see if we already have the sign-off by the signer */
+	while ((cp = strstr(cp, signed_off_by))) {
+
+		has_signoff = 1;
+
+		cp += strlen(signed_off_by);
+		if (cp + signoff_len >= sb->buf + sb->len)
+			break;
+		if (strncmp(cp, signoff, signoff_len))
+			continue;
+		if (!isspace(cp[signoff_len]))
+			continue;
+		/* we already have him */
+		return;
+	}
+
+	if (!has_signoff)
+		has_signoff = detect_any_signoff(sb->buf, sb->len);
+
+	if (!has_signoff)
+		strbuf_addch(sb, '\n');
+
+	strbuf_addstr(sb, signed_off_by);
+	strbuf_add(sb, signoff, signoff_len);
+	strbuf_addch(sb, '\n');
+}
+
+static unsigned int digits_in_number(unsigned int number)
+{
+	unsigned int i = 10, result = 1;
+	while (i <= number) {
+		i *= 10;
+		result++;
+	}
+	return result;
+}
+
+static int has_non_ascii(const char *s)
+{
+	int ch;
+	if (!s)
+		return 0;
+	while ((ch = *s++) != '\0') {
+		if (non_ascii(ch))
+			return 1;
+	}
+	return 0;
+}
+
+void log_write_email_headers(struct rev_info *opt, const char *name,
+			     const char **subject_p,
+			     const char **extra_headers_p,
+			     int *need_8bit_cte_p)
+{
+	const char *subject = NULL;
+	const char *extra_headers = opt->extra_headers;
+
+	*need_8bit_cte_p = 0; /* unknown */
+	if (opt->total > 0) {
+		static char buffer[64];
+		snprintf(buffer, sizeof(buffer),
+			 "Subject: [%s %0*d/%d] ",
+			 opt->subject_prefix,
+			 digits_in_number(opt->total),
+			 opt->nr, opt->total);
+		subject = buffer;
+	} else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
+		static char buffer[256];
+		snprintf(buffer, sizeof(buffer),
+			 "Subject: [%s] ",
+			 opt->subject_prefix);
+		subject = buffer;
+	} else {
+		subject = "Subject: ";
+	}
+
+	printf("From %s Mon Sep 17 00:00:00 2001\n", name);
+	graph_show_oneline(opt->graph);
+	if (opt->message_id) {
+		printf("Message-Id: <%s>\n", opt->message_id);
+		graph_show_oneline(opt->graph);
+	}
+	if (opt->ref_message_id) {
+		printf("In-Reply-To: <%s>\nReferences: <%s>\n",
+		       opt->ref_message_id, opt->ref_message_id);
+		graph_show_oneline(opt->graph);
+	}
+	if (opt->mime_boundary) {
+		static char subject_buffer[1024];
+		static char buffer[1024];
+		*need_8bit_cte_p = -1; /* NEVER */
+		snprintf(subject_buffer, sizeof(subject_buffer) - 1,
+			 "%s"
+			 "MIME-Version: 1.0\n"
+			 "Content-Type: multipart/mixed;"
+			 " boundary=\"%s%s\"\n"
+			 "\n"
+			 "This is a multi-part message in MIME "
+			 "format.\n"
+			 "--%s%s\n"
+			 "Content-Type: text/plain; "
+			 "charset=UTF-8; format=fixed\n"
+			 "Content-Transfer-Encoding: 8bit\n\n",
+			 extra_headers ? extra_headers : "",
+			 mime_boundary_leader, opt->mime_boundary,
+			 mime_boundary_leader, opt->mime_boundary);
+		extra_headers = subject_buffer;
+
+		snprintf(buffer, sizeof(buffer) - 1,
+			 "\n--%s%s\n"
+			 "Content-Type: text/x-patch;"
+			 " name=\"%s.diff\"\n"
+			 "Content-Transfer-Encoding: 8bit\n"
+			 "Content-Disposition: %s;"
+			 " filename=\"%s.diff\"\n\n",
+			 mime_boundary_leader, opt->mime_boundary,
+			 name,
+			 opt->no_inline ? "attachment" : "inline",
+			 name);
+		opt->diffopt.stat_sep = buffer;
+	}
+	*subject_p = subject;
+	*extra_headers_p = extra_headers;
+}
+
+void show_log(struct rev_info *opt)
+{
+	struct strbuf msgbuf = STRBUF_INIT;
+	struct log_info *log = opt->loginfo;
+	struct commit *commit = log->commit, *parent = log->parent;
+	int abbrev = opt->diffopt.abbrev;
+	int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
+	const char *subject = NULL, *extra_headers = opt->extra_headers;
+	int need_8bit_cte = 0;
+
+	opt->loginfo = NULL;
+	if (!opt->verbose_header) {
+		graph_show_commit(opt->graph);
+
+		if (!opt->graph) {
+			if (commit->object.flags & BOUNDARY)
+				putchar('-');
+			else if (commit->object.flags & UNINTERESTING)
+				putchar('^');
+			else if (opt->left_right) {
+				if (commit->object.flags & SYMMETRIC_LEFT)
+					putchar('<');
+				else
+					putchar('>');
+			}
+		}
+		fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
+		if (opt->print_parents)
+			show_parents(commit, abbrev_commit);
+		show_decorations(opt, commit);
+		if (opt->graph && !graph_is_commit_finished(opt->graph)) {
+			putchar('\n');
+			graph_show_remainder(opt->graph);
+		}
+		putchar(opt->diffopt.line_termination);
+		return;
+	}
+
+	/*
+	 * If use_terminator is set, add a newline at the end of the entry.
+	 * Otherwise, add a diffopt.line_termination character before all
+	 * entries but the first.  (IOW, as a separator between entries)
+	 */
+	if (opt->shown_one && !opt->use_terminator) {
+		/*
+		 * If entries are separated by a newline, the output
+		 * should look human-readable.  If the last entry ended
+		 * with a newline, print the graph output before this
+		 * newline.  Otherwise it will end up as a completely blank
+		 * line and will look like a gap in the graph.
+		 *
+		 * If the entry separator is not a newline, the output is
+		 * primarily intended for programmatic consumption, and we
+		 * never want the extra graph output before the entry
+		 * separator.
+		 */
+		if (opt->diffopt.line_termination == '\n' &&
+		    !opt->missing_newline)
+			graph_show_padding(opt->graph);
+		putchar(opt->diffopt.line_termination);
+	}
+	opt->shown_one = 1;
+
+	/*
+	 * If the history graph was requested,
+	 * print the graph, up to this commit's line
+	 */
+	graph_show_commit(opt->graph);
+
+	/*
+	 * Print header line of header..
+	 */
+
+	if (opt->commit_format == CMIT_FMT_EMAIL) {
+		log_write_email_headers(opt, sha1_to_hex(commit->object.sha1),
+					&subject, &extra_headers,
+					&need_8bit_cte);
+	} else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
+		fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
+		if (opt->commit_format != CMIT_FMT_ONELINE)
+			fputs("commit ", stdout);
+
+		if (!opt->graph) {
+			if (commit->object.flags & BOUNDARY)
+				putchar('-');
+			else if (commit->object.flags & UNINTERESTING)
+				putchar('^');
+			else if (opt->left_right) {
+				if (commit->object.flags & SYMMETRIC_LEFT)
+					putchar('<');
+				else
+					putchar('>');
+			}
+		}
+		fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
+		      stdout);
+		if (opt->print_parents)
+			show_parents(commit, abbrev_commit);
+		if (parent)
+			printf(" (from %s)",
+			       diff_unique_abbrev(parent->object.sha1,
+						  abbrev_commit));
+		show_decorations(opt, commit);
+		printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
+		if (opt->commit_format == CMIT_FMT_ONELINE) {
+			putchar(' ');
+		} else {
+			putchar('\n');
+			graph_show_oneline(opt->graph);
+		}
+		if (opt->reflog_info) {
+			/*
+			 * setup_revisions() ensures that opt->reflog_info
+			 * and opt->graph cannot both be set,
+			 * so we don't need to worry about printing the
+			 * graph info here.
+			 */
+			show_reflog_message(opt->reflog_info,
+				    opt->commit_format == CMIT_FMT_ONELINE,
+				    opt->date_mode);
+			if (opt->commit_format == CMIT_FMT_ONELINE)
+				return;
+		}
+	}
+
+	if (!commit->buffer)
+		return;
+
+	/*
+	 * And then the pretty-printed message itself
+	 */
+	if (need_8bit_cte >= 0)
+		need_8bit_cte = has_non_ascii(opt->add_signoff);
+	pretty_print_commit(opt->commit_format, commit, &msgbuf,
+			    abbrev, subject, extra_headers, opt->date_mode,
+			    need_8bit_cte);
+
+	if (opt->add_signoff)
+		append_signoff(&msgbuf, opt->add_signoff);
+	if (opt->show_log_size) {
+		printf("log size %i\n", (int)msgbuf.len);
+		graph_show_oneline(opt->graph);
+	}
+
+	/*
+	 * Set opt->missing_newline if msgbuf doesn't
+	 * end in a newline (including if it is empty)
+	 */
+	if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
+		opt->missing_newline = 1;
+	else
+		opt->missing_newline = 0;
+
+	if (opt->graph)
+		graph_show_commit_msg(opt->graph, &msgbuf);
+	else
+		fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
+	if (opt->use_terminator) {
+		if (!opt->missing_newline)
+			graph_show_padding(opt->graph);
+		putchar('\n');
+	}
+
+	strbuf_release(&msgbuf);
+}
+
+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) {
+		/* When showing a verbose header (i.e. log message),
+		 * and not in --pretty=oneline format, we would want
+		 * an extra newline between the end of log and the
+		 * output for readability.
+		 */
+		show_log(opt);
+		if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
+		    opt->verbose_header &&
+		    opt->commit_format != CMIT_FMT_ONELINE) {
+			int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
+			if ((pch & opt->diffopt.output_format) == pch)
+				printf("---");
+			putchar('\n');
+		}
+	}
+	diff_flush(&opt->diffopt);
+	return 1;
+}
+
+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 && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
+		return 0;
+
+	/* Root commit? */
+	parents = commit->parents;
+	if (!parents) {
+		if (opt->show_root_diff) {
+			diff_root_tree_sha1(sha1, "", &opt->diffopt);
+			log_tree_diff_flush(opt);
+		}
+		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;
+	int shown;
+
+	log.commit = commit;
+	log.parent = NULL;
+	opt->loginfo = &log;
+
+	shown = log_tree_diff(opt, commit, &log);
+	if (!shown && opt->loginfo && opt->always_show_header) {
+		log.parent = NULL;
+		show_log(opt);
+		shown = 1;
+	}
+	opt->loginfo = NULL;
+	maybe_flush_or_die(stdout, "stdout");
+	return shown;
+}