1 files changed, 555 insertions, 0 deletions

diff --git a/www/git.causal.agency/cgit/ui-log.c b/www/git.causal.agency/cgit/ui-log.c
new file mode 100644
index 00000000..b443ca73
--- /dev/null
+++ b/www/git.causal.agency/cgit/ui-log.c
@@ -0,0 +1,555 @@
+/* ui-log.c: functions for log output
+ *
+ * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
+ *
+ * Licensed under GNU General Public License v2
+ *   (see COPYING for full license text)
+ */
+
+#include "cgit.h"
+#include "ui-log.h"
+#include "html.h"
+#include "ui-shared.h"
+#include "strvec.h"
+
+static int files, add_lines, rem_lines, lines_counted;
+
+/*
+ * The list of available column colors in the commit graph.
+ */
+static const char *column_colors_html[] = {
+	"<span class='column1'>",
+	"<span class='column2'>",
+	"<span class='column3'>",
+	"<span class='column4'>",
+	"<span class='column5'>",
+	"<span class='column6'>",
+	"</span>",
+};
+
+#define COLUMN_COLORS_HTML_MAX (ARRAY_SIZE(column_colors_html) - 1)
+
+static void count_lines(char *line, int size)
+{
+	if (size <= 0)
+		return;
+
+	if (line[0] == '+')
+		add_lines++;
+
+	else if (line[0] == '-')
+		rem_lines++;
+}
+
+static void inspect_files(struct diff_filepair *pair)
+{
+	unsigned long old_size = 0;
+	unsigned long new_size = 0;
+	int binary = 0;
+
+	files++;
+	if (ctx.repo->enable_log_linecount)
+		cgit_diff_files(&pair->one->oid, &pair->two->oid, &old_size,
+				&new_size, &binary, 0, ctx.qry.ignorews,
+				count_lines);
+}
+
+void show_commit_decorations(struct commit *commit)
+{
+	const struct name_decoration *deco;
+	static char buf[1024];
+
+	buf[sizeof(buf) - 1] = 0;
+	deco = get_name_decoration(&commit->object);
+	if (!deco)
+		return;
+	html("<span class='decoration'>");
+	while (deco) {
+		struct object_id oid_tag, peeled;
+		int is_annotated = 0;
+
+		strlcpy(buf, prettify_refname(deco->name), sizeof(buf));
+		switch(deco->type) {
+		case DECORATION_NONE:
+			/* If the git-core doesn't recognize it,
+			 * don't display anything. */
+			break;
+		case DECORATION_REF_LOCAL:
+			html(" ");
+			cgit_log_link(buf, NULL, "branch-deco", buf, NULL,
+				ctx.qry.vpath, 0, NULL, NULL,
+				ctx.qry.showmsg, 0);
+			break;
+		case DECORATION_REF_TAG:
+			html(" ");
+			if (!read_ref(deco->name, &oid_tag) && !peel_iterated_oid(&oid_tag, &peeled))
+				is_annotated = !oideq(&oid_tag, &peeled);
+			cgit_tag_link(buf, NULL, is_annotated ? "tag-annotated-deco" : "tag-deco", buf);
+			break;
+		case DECORATION_REF_REMOTE:
+			if (!ctx.repo->enable_remote_branches)
+				break;
+			html(" ");
+			cgit_log_link(buf, NULL, "remote-deco", NULL,
+				oid_to_hex(&commit->object.oid),
+				ctx.qry.vpath, 0, NULL, NULL,
+				ctx.qry.showmsg, 0);
+			break;
+		default:
+			html(" ");
+			cgit_commit_link(buf, NULL, "deco", ctx.qry.head,
+					oid_to_hex(&commit->object.oid),
+					ctx.qry.vpath);
+			break;
+		}
+		deco = deco->next;
+	}
+	html("</span>");
+}
+
+static void handle_rename(struct diff_filepair *pair)
+{
+	/*
+	 * After we have seen a rename, we generate links to the previous
+	 * name of the file so that commit & diff views get fed the path
+	 * that is correct for the commit they are showing, avoiding the
+	 * need to walk the entire history leading back to every commit we
+	 * show in order detect renames.
+	 */
+	if (0 != strcmp(ctx.qry.vpath, pair->two->path)) {
+		free(ctx.qry.vpath);
+		ctx.qry.vpath = xstrdup(pair->two->path);
+	}
+	inspect_files(pair);
+}
+
+static int show_commit(struct commit *commit, struct rev_info *revs)
+{
+	struct commit_list *parents = commit->parents;
+	struct commit *parent;
+	int found = 0, saved_fmt;
+	struct diff_flags saved_flags = revs->diffopt.flags;
+
+	/* Always show if we're not in "follow" mode with a single file. */
+	if (!ctx.qry.follow)
+		return 1;
+
+	/*
+	 * In "follow" mode, we don't show merges.  This is consistent with
+	 * "git log --follow -- <file>".
+	 */
+	if (parents && parents->next)
+		return 0;
+
+	/*
+	 * If this is the root commit, do what rev_info tells us.
+	 */
+	if (!parents)
+		return revs->show_root_diff;
+
+	/* When we get here we have precisely one parent. */
+	parent = parents->item;
+	/* If we can't parse the commit, let print_commit() report an error. */
+	if (parse_commit(parent))
+		return 1;
+
+	files = 0;
+	add_lines = 0;
+	rem_lines = 0;
+
+	revs->diffopt.flags.recursive = 1;
+	diff_tree_oid(get_commit_tree_oid(parent),
+		      get_commit_tree_oid(commit),
+		      "", &revs->diffopt);
+	diffcore_std(&revs->diffopt);
+
+	found = !diff_queue_is_empty();
+	saved_fmt = revs->diffopt.output_format;
+	revs->diffopt.output_format = DIFF_FORMAT_CALLBACK;
+	revs->diffopt.format_callback = cgit_diff_tree_cb;
+	revs->diffopt.format_callback_data = handle_rename;
+	diff_flush(&revs->diffopt);
+	revs->diffopt.output_format = saved_fmt;
+	revs->diffopt.flags = saved_flags;
+
+	lines_counted = 1;
+	return found;
+}
+
+static void print_commit(struct commit *commit, struct rev_info *revs)
+{
+	struct commitinfo *info;
+	int columns = revs->graph ? 4 : 3;
+	struct strbuf graphbuf = STRBUF_INIT;
+	struct strbuf msgbuf = STRBUF_INIT;
+
+	if (ctx.repo->enable_log_filecount)
+		columns++;
+	if (ctx.repo->enable_log_linecount)
+		columns++;
+
+	if (revs->graph) {
+		/* Advance graph until current commit */
+		while (!graph_next_line(revs->graph, &graphbuf)) {
+			/* Print graph segment in otherwise empty table row */
+			html("<tr class='nohover'><td class='commitgraph'>");
+			html(graphbuf.buf);
+			htmlf("</td><td colspan='%d' /></tr>\n", columns);
+			strbuf_setlen(&graphbuf, 0);
+		}
+		/* Current commit's graph segment is now ready in graphbuf */
+	}
+
+	info = cgit_parse_commit(commit);
+	htmlf("<tr%s>", ctx.qry.showmsg ? " class='logheader'" : "");
+
+	if (revs->graph) {
+		/* Print graph segment for current commit */
+		html("<td class='commitgraph'>");
+		html(graphbuf.buf);
+		html("</td>");
+		strbuf_setlen(&graphbuf, 0);
+	}
+	else {
+		html("<td>");
+		cgit_print_age(info->committer_date, info->committer_tz, TM_WEEK * 2);
+		html("</td>");
+	}
+
+	htmlf("<td%s>", ctx.qry.showmsg ? " class='logsubject'" : "");
+	if (ctx.qry.showmsg) {
+		/* line-wrap long commit subjects instead of truncating them */
+		size_t subject_len = strlen(info->subject);
+
+		if (subject_len > ctx.cfg.max_msg_len &&
+		    ctx.cfg.max_msg_len >= 15) {
+			/* symbol for signaling line-wrap (in PAGE_ENCODING) */
+			const char wrap_symbol[] = { ' ', 0xE2, 0x86, 0xB5, 0 };
+			int i = ctx.cfg.max_msg_len - strlen(wrap_symbol);
+
+			/* Rewind i to preceding space character */
+			while (i > 0 && !isspace(info->subject[i]))
+				--i;
+			if (!i) /* Oops, zero spaces. Reset i */
+				i = ctx.cfg.max_msg_len - strlen(wrap_symbol);
+
+			/* add remainder starting at i to msgbuf */
+			strbuf_add(&msgbuf, info->subject + i, subject_len - i);
+			strbuf_trim(&msgbuf);
+			strbuf_add(&msgbuf, "\n\n", 2);
+
+			/* Place wrap_symbol at position i in info->subject */
+			strlcpy(info->subject + i, wrap_symbol, subject_len - i + 1);
+		}
+	}
+	cgit_commit_link(info->subject, NULL, NULL, ctx.qry.head,
+			 oid_to_hex(&commit->object.oid), ctx.qry.vpath);
+	show_commit_decorations(commit);
+	html("</td><td>");
+	cgit_open_filter(ctx.repo->email_filter, info->author_email, "log");
+	html_txt(info->author);
+	cgit_close_filter(ctx.repo->email_filter);
+
+	if (revs->graph) {
+		html("</td><td>");
+		cgit_print_age(info->committer_date, info->committer_tz, TM_WEEK * 2);
+	}
+
+	if (!lines_counted && (ctx.repo->enable_log_filecount ||
+			       ctx.repo->enable_log_linecount)) {
+		files = 0;
+		add_lines = 0;
+		rem_lines = 0;
+		cgit_diff_commit(commit, inspect_files, ctx.qry.vpath);
+	}
+
+	if (ctx.repo->enable_log_filecount)
+		htmlf("</td><td>%d", files);
+	if (ctx.repo->enable_log_linecount)
+		htmlf("</td><td><span class='deletions'>-%d</span>/"
+			"<span class='insertions'>+%d</span>", rem_lines, add_lines);
+
+	html("</td></tr>\n");
+
+	if ((revs->graph && !graph_is_commit_finished(revs->graph))
+			|| ctx.qry.showmsg) { /* Print a second table row */
+		html("<tr class='nohover-highlight'>");
+
+		if (ctx.qry.showmsg) {
+			/* Concatenate commit message + notes in msgbuf */
+			if (info->msg && *(info->msg)) {
+				strbuf_addstr(&msgbuf, info->msg);
+				strbuf_addch(&msgbuf, '\n');
+			}
+			format_display_notes(&commit->object.oid,
+					     &msgbuf, PAGE_ENCODING, 0);
+			strbuf_addch(&msgbuf, '\n');
+			strbuf_ltrim(&msgbuf);
+		}
+
+		if (revs->graph) {
+			int lines = 0;
+
+			/* Calculate graph padding */
+			if (ctx.qry.showmsg) {
+				/* Count #lines in commit message + notes */
+				const char *p = msgbuf.buf;
+				lines = 1;
+				while ((p = strchr(p, '\n'))) {
+					p++;
+					lines++;
+				}
+			}
+
+			/* Print graph padding */
+			html("<td class='commitgraph'>");
+			while (lines > 0 || !graph_is_commit_finished(revs->graph)) {
+				if (graphbuf.len)
+					html("\n");
+				strbuf_setlen(&graphbuf, 0);
+				graph_next_line(revs->graph, &graphbuf);
+				html(graphbuf.buf);
+				lines--;
+			}
+			html("</td>\n");
+		}
+		else
+			html("<td/>"); /* Empty 'Age' column */
+
+		/* Print msgbuf into remainder of table row */
+		htmlf("<td colspan='%d'%s>\n", columns - (revs->graph ? 1 : 0),
+			ctx.qry.showmsg ? " class='logmsg'" : "");
+		html_txt(msgbuf.buf);
+		html("</td></tr>\n");
+	}
+
+	strbuf_release(&msgbuf);
+	strbuf_release(&graphbuf);
+	cgit_free_commitinfo(info);
+}
+
+static const char *disambiguate_ref(const char *ref, int *must_free_result)
+{
+	struct object_id oid;
+	struct strbuf longref = STRBUF_INIT;
+
+	strbuf_addf(&longref, "refs/heads/%s", ref);
+	if (get_oid(longref.buf, &oid) == 0) {
+		*must_free_result = 1;
+		return strbuf_detach(&longref, NULL);
+	}
+
+	*must_free_result = 0;
+	strbuf_release(&longref);
+	return ref;
+}
+
+static char *next_token(char **src)
+{
+	char *result;
+
+	if (!src || !*src)
+		return NULL;
+	while (isspace(**src))
+		(*src)++;
+	if (!**src)
+		return NULL;
+	result = *src;
+	while (**src) {
+		if (isspace(**src)) {
+			**src = '\0';
+			(*src)++;
+			break;
+		}
+		(*src)++;
+	}
+	return result;
+}
+
+void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern,
+		    const char *path, int pager, int commit_graph, int commit_sort)
+{
+	struct rev_info rev;
+	struct commit *commit;
+	struct strvec rev_argv = STRVEC_INIT;
+	int i, columns = commit_graph ? 4 : 3;
+	int must_free_tip = 0;
+
+	/* rev_argv.argv[0] will be ignored by setup_revisions */
+	strvec_push(&rev_argv, "log_rev_setup");
+
+	if (!tip)
+		tip = ctx.qry.head;
+	tip = disambiguate_ref(tip, &must_free_tip);
+	strvec_push(&rev_argv, tip);
+
+	if (grep && pattern && *pattern) {
+		pattern = xstrdup(pattern);
+		if (!strcmp(grep, "grep") || !strcmp(grep, "author") ||
+		    !strcmp(grep, "committer")) {
+			strvec_pushf(&rev_argv, "--%s=%s", grep, pattern);
+		} else if (!strcmp(grep, "range")) {
+			char *arg;
+			/* Split the pattern at whitespace and add each token
+			 * as a revision expression. Do not accept other
+			 * rev-list options. Also, replace the previously
+			 * pushed tip (it's no longer relevant).
+			 */
+			strvec_pop(&rev_argv);
+			while ((arg = next_token(&pattern))) {
+				if (*arg == '-') {
+					fprintf(stderr, "Bad range expr: %s\n",
+						arg);
+					break;
+				}
+				strvec_push(&rev_argv, arg);
+			}
+		}
+	}
+
+	if (!path || !ctx.cfg.enable_follow_links) {
+		/*
+		 * If we don't have a path, "follow" is a no-op so make sure
+		 * the variable is set to false to avoid needing to check
+		 * both this and whether we have a path everywhere.
+		 */
+		ctx.qry.follow = 0;
+	}
+
+	if (commit_graph && !ctx.qry.follow) {
+		strvec_push(&rev_argv, "--graph");
+		strvec_push(&rev_argv, "--color");
+		graph_set_column_colors(column_colors_html,
+					COLUMN_COLORS_HTML_MAX);
+	}
+
+	if (commit_sort == 1)
+		strvec_push(&rev_argv, "--date-order");
+	else if (commit_sort == 2)
+		strvec_push(&rev_argv, "--topo-order");
+
+	if (path && ctx.qry.follow)
+		strvec_push(&rev_argv, "--follow");
+	strvec_push(&rev_argv, "--");
+	if (path)
+		strvec_push(&rev_argv, path);
+
+	init_revisions(&rev, NULL);
+	rev.abbrev = DEFAULT_ABBREV;
+	rev.commit_format = CMIT_FMT_DEFAULT;
+	rev.verbose_header = 1;
+	rev.show_root_diff = 0;
+	rev.ignore_missing = 1;
+	rev.simplify_history = 1;
+	setup_revisions(rev_argv.nr, rev_argv.v, &rev, NULL);
+	load_ref_decorations(NULL, DECORATE_FULL_REFS);
+	rev.show_decorations = 1;
+	rev.grep_filter.ignore_case = 1;
+
+	rev.diffopt.detect_rename = 1;
+	rev.diffopt.rename_limit = ctx.cfg.renamelimit;
+	if (ctx.qry.ignorews)
+		DIFF_XDL_SET(&rev.diffopt, IGNORE_WHITESPACE);
+
+	compile_grep_patterns(&rev.grep_filter);
+	prepare_revision_walk(&rev);
+
+	if (pager) {
+		cgit_print_layout_start();
+		html("<table class='list nowrap'>");
+	}
+
+	html("<tr class='nohover'>");
+	if (commit_graph)
+		html("<th></th>");
+	else
+		html("<th class='left'>Age</th>");
+	html("<th class='left'>Commit message");
+	if (pager) {
+		html(" (");
+		cgit_log_link(ctx.qry.showmsg ? "Collapse" : "Expand", NULL,
+			      NULL, ctx.qry.head, ctx.qry.oid,
+			      ctx.qry.vpath, ctx.qry.ofs, ctx.qry.grep,
+			      ctx.qry.search, ctx.qry.showmsg ? 0 : 1,
+			      ctx.qry.follow);
+		html(")");
+	}
+	html("</th><th class='left'>Author</th>");
+	if (rev.graph)
+		html("<th class='left'>Age</th>");
+	if (ctx.repo->enable_log_filecount) {
+		html("<th class='left'>Files</th>");
+		columns++;
+	}
+	if (ctx.repo->enable_log_linecount) {
+		html("<th class='left'>Lines</th>");
+		columns++;
+	}
+	html("</tr>\n");
+
+	if (ofs<0)
+		ofs = 0;
+
+	for (i = 0; i < ofs && (commit = get_revision(&rev)) != NULL; /* nop */) {
+		if (show_commit(commit, &rev))
+			i++;
+		free_commit_buffer(the_repository->parsed_objects, commit);
+		free_commit_list(commit->parents);
+		commit->parents = NULL;
+	}
+
+	for (i = 0; i < cnt && (commit = get_revision(&rev)) != NULL; /* nop */) {
+		/*
+		 * In "follow" mode, we must count the files and lines the
+		 * first time we invoke diff on a given commit, and we need
+		 * to do that to see if the commit touches the path we care
+		 * about, so we do it in show_commit.  Hence we must clear
+		 * lines_counted here.
+		 *
+		 * This has the side effect of avoiding running diff twice
+		 * when we are both following renames and showing file
+		 * and/or line counts.
+		 */
+		lines_counted = 0;
+		if (show_commit(commit, &rev)) {
+			i++;
+			print_commit(commit, &rev);
+		}
+		free_commit_buffer(the_repository->parsed_objects, commit);
+		free_commit_list(commit->parents);
+		commit->parents = NULL;
+	}
+	if (pager) {
+		html("</table><ul class='pager'>");
+		if (ofs > 0) {
+			html("<li>");
+			cgit_log_link("[prev]", NULL, NULL, ctx.qry.head,
+				      ctx.qry.oid, ctx.qry.vpath,
+				      ofs - cnt, ctx.qry.grep,
+				      ctx.qry.search, ctx.qry.showmsg,
+				      ctx.qry.follow);
+			html("</li>");
+		}
+		if ((commit = get_revision(&rev)) != NULL) {
+			html("<li>");
+			cgit_log_link("[next]", NULL, NULL, ctx.qry.head,
+				      ctx.qry.oid, ctx.qry.vpath,
+				      ofs + cnt, ctx.qry.grep,
+				      ctx.qry.search, ctx.qry.showmsg,
+				      ctx.qry.follow);
+			html("</li>");
+		}
+		html("</ul>");
+		cgit_print_layout_end();
+	} else if ((commit = get_revision(&rev)) != NULL) {
+		htmlf("<tr class='nohover'><td colspan='%d'>", columns);
+		cgit_log_link("[...]", NULL, NULL, ctx.qry.head, NULL,
+			      ctx.qry.vpath, 0, NULL, NULL, ctx.qry.showmsg,
+			      ctx.qry.follow);
+		html("</td></tr>\n");
+	}
+
+	/* If we allocated tip then it is safe to cast away const. */
+	if (must_free_tip)
+		free((char*) tip);
+}