1 files changed, 579 insertions, 0 deletions

diff --git a/www/git.causal.agency/cgit/shared.c b/www/git.causal.agency/cgit/shared.c
new file mode 100644
index 00000000..8115469a
--- /dev/null
+++ b/www/git.causal.agency/cgit/shared.c
@@ -0,0 +1,579 @@
+/* shared.c: global vars + some callback functions
+ *
+ * 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"
+
+struct cgit_repolist cgit_repolist;
+struct cgit_context ctx;
+
+int chk_zero(int result, char *msg)
+{
+	if (result != 0)
+		die_errno("%s", msg);
+	return result;
+}
+
+int chk_positive(int result, char *msg)
+{
+	if (result <= 0)
+		die_errno("%s", msg);
+	return result;
+}
+
+int chk_non_negative(int result, char *msg)
+{
+	if (result < 0)
+		die_errno("%s", msg);
+	return result;
+}
+
+char *cgit_default_repo_desc = "[no description]";
+struct cgit_repo *cgit_add_repo(const char *url)
+{
+	struct cgit_repo *ret;
+
+	if (++cgit_repolist.count > cgit_repolist.length) {
+		if (cgit_repolist.length == 0)
+			cgit_repolist.length = 8;
+		else
+			cgit_repolist.length *= 2;
+		cgit_repolist.repos = xrealloc(cgit_repolist.repos,
+					       cgit_repolist.length *
+					       sizeof(struct cgit_repo));
+	}
+
+	ret = &cgit_repolist.repos[cgit_repolist.count-1];
+	memset(ret, 0, sizeof(struct cgit_repo));
+	ret->url = trim_end(url, '/');
+	ret->name = ret->url;
+	ret->path = NULL;
+	ret->desc = cgit_default_repo_desc;
+	ret->extra_head_content = NULL;
+	ret->owner = NULL;
+	ret->homepage = NULL;
+	ret->section = ctx.cfg.section;
+	ret->snapshots = ctx.cfg.snapshots;
+	ret->enable_blame = ctx.cfg.enable_blame;
+	ret->enable_commit_graph = ctx.cfg.enable_commit_graph;
+	ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
+	ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
+	ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
+	ret->enable_subject_links = ctx.cfg.enable_subject_links;
+	ret->enable_html_serving = ctx.cfg.enable_html_serving;
+	ret->max_stats = ctx.cfg.max_stats;
+	ret->branch_sort = ctx.cfg.branch_sort;
+	ret->commit_sort = ctx.cfg.commit_sort;
+	ret->module_link = ctx.cfg.module_link;
+	ret->readme = ctx.cfg.readme;
+	ret->mtime = -1;
+	ret->about_filter = ctx.cfg.about_filter;
+	ret->commit_filter = ctx.cfg.commit_filter;
+	ret->source_filter = ctx.cfg.source_filter;
+	ret->email_filter = ctx.cfg.email_filter;
+	ret->owner_filter = ctx.cfg.owner_filter;
+	ret->clone_url = ctx.cfg.clone_url;
+	ret->submodules.strdup_strings = 1;
+	ret->hide = ret->ignore = 0;
+	return ret;
+}
+
+struct cgit_repo *cgit_get_repoinfo(const char *url)
+{
+	int i;
+	struct cgit_repo *repo;
+
+	for (i = 0; i < cgit_repolist.count; i++) {
+		repo = &cgit_repolist.repos[i];
+		if (repo->ignore)
+			continue;
+		if (!strcmp(repo->url, url))
+			return repo;
+	}
+	return NULL;
+}
+
+void cgit_free_commitinfo(struct commitinfo *info)
+{
+	free(info->author);
+	free(info->author_email);
+	free(info->committer);
+	free(info->committer_email);
+	free(info->subject);
+	free(info->msg);
+	free(info->msg_encoding);
+	free(info);
+}
+
+char *trim_end(const char *str, char c)
+{
+	int len;
+
+	if (str == NULL)
+		return NULL;
+	len = strlen(str);
+	while (len > 0 && str[len - 1] == c)
+		len--;
+	if (len == 0)
+		return NULL;
+	return xstrndup(str, len);
+}
+
+char *ensure_end(const char *str, char c)
+{
+	size_t len = strlen(str);
+	char *result;
+
+	if (len && str[len - 1] == c)
+		return xstrndup(str, len);
+
+	result = xmalloc(len + 2);
+	memcpy(result, str, len);
+	result[len] = '/';
+	result[len + 1] = '\0';
+	return result;
+}
+
+void strbuf_ensure_end(struct strbuf *sb, char c)
+{
+	if (!sb->len || sb->buf[sb->len - 1] != c)
+		strbuf_addch(sb, c);
+}
+
+void cgit_add_ref(struct reflist *list, struct refinfo *ref)
+{
+	size_t size;
+
+	if (list->count >= list->alloc) {
+		list->alloc += (list->alloc ? list->alloc : 4);
+		size = list->alloc * sizeof(struct refinfo *);
+		list->refs = xrealloc(list->refs, size);
+	}
+	list->refs[list->count++] = ref;
+}
+
+static struct refinfo *cgit_mk_refinfo(const char *refname, const struct object_id *oid)
+{
+	struct refinfo *ref;
+
+	ref = xmalloc(sizeof (struct refinfo));
+	ref->refname = xstrdup(refname);
+	ref->object = parse_object(the_repository, oid);
+	switch (ref->object->type) {
+	case OBJ_TAG:
+		ref->tag = cgit_parse_tag((struct tag *)ref->object);
+		break;
+	case OBJ_COMMIT:
+		ref->commit = cgit_parse_commit((struct commit *)ref->object);
+		break;
+	}
+	return ref;
+}
+
+void cgit_free_taginfo(struct taginfo *tag)
+{
+	if (tag->tagger)
+		free(tag->tagger);
+	if (tag->tagger_email)
+		free(tag->tagger_email);
+	if (tag->msg)
+		free(tag->msg);
+	free(tag);
+}
+
+static void cgit_free_refinfo(struct refinfo *ref)
+{
+	if (ref->refname)
+		free((char *)ref->refname);
+	switch (ref->object->type) {
+	case OBJ_TAG:
+		cgit_free_taginfo(ref->tag);
+		break;
+	case OBJ_COMMIT:
+		cgit_free_commitinfo(ref->commit);
+		break;
+	}
+	free(ref);
+}
+
+void cgit_free_reflist_inner(struct reflist *list)
+{
+	int i;
+
+	for (i = 0; i < list->count; i++) {
+		cgit_free_refinfo(list->refs[i]);
+	}
+	free(list->refs);
+}
+
+int cgit_refs_cb(const char *refname, const struct object_id *oid, int flags,
+		  void *cb_data)
+{
+	struct reflist *list = (struct reflist *)cb_data;
+	struct refinfo *info = cgit_mk_refinfo(refname, oid);
+
+	if (info)
+		cgit_add_ref(list, info);
+	return 0;
+}
+
+void cgit_diff_tree_cb(struct diff_queue_struct *q,
+		       struct diff_options *options, void *data)
+{
+	int i;
+
+	for (i = 0; i < q->nr; i++) {
+		if (q->queue[i]->status == 'U')
+			continue;
+		((filepair_fn)data)(q->queue[i]);
+	}
+}
+
+static int load_mmfile(mmfile_t *file, const struct object_id *oid)
+{
+	enum object_type type;
+
+	if (is_null_oid(oid)) {
+		file->ptr = (char *)"";
+		file->size = 0;
+	} else {
+		file->ptr = read_object_file(oid, &type,
+		                           (unsigned long *)&file->size);
+	}
+	return 1;
+}
+
+/*
+ * Receive diff-buffers from xdiff and concatenate them as
+ * needed across multiple callbacks.
+ *
+ * This is basically a copy of xdiff-interface.c/xdiff_outf(),
+ * ripped from git and modified to use globals instead of
+ * a special callback-struct.
+ */
+static char *diffbuf = NULL;
+static int buflen = 0;
+
+static int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
+{
+	int i;
+
+	for (i = 0; i < nbuf; i++) {
+		if (mb[i].ptr[mb[i].size-1] != '\n') {
+			/* Incomplete line */
+			diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
+			memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
+			buflen += mb[i].size;
+			continue;
+		}
+
+		/* we have a complete line */
+		if (!diffbuf) {
+			((linediff_fn)priv)(mb[i].ptr, mb[i].size);
+			continue;
+		}
+		diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
+		memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
+		((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
+		free(diffbuf);
+		diffbuf = NULL;
+		buflen = 0;
+	}
+	if (diffbuf) {
+		((linediff_fn)priv)(diffbuf, buflen);
+		free(diffbuf);
+		diffbuf = NULL;
+		buflen = 0;
+	}
+	return 0;
+}
+
+int cgit_diff_files(const struct object_id *old_oid,
+		    const struct object_id *new_oid, unsigned long *old_size,
+		    unsigned long *new_size, int *binary, int context,
+		    int ignorews, linediff_fn fn)
+{
+	mmfile_t file1, file2;
+	xpparam_t diff_params;
+	xdemitconf_t emit_params;
+	xdemitcb_t emit_cb;
+
+	if (!load_mmfile(&file1, old_oid) || !load_mmfile(&file2, new_oid))
+		return 1;
+
+	*old_size = file1.size;
+	*new_size = file2.size;
+
+	if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
+	    (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
+		*binary = 1;
+		if (file1.size)
+			free(file1.ptr);
+		if (file2.size)
+			free(file2.ptr);
+		return 0;
+	}
+
+	memset(&diff_params, 0, sizeof(diff_params));
+	memset(&emit_params, 0, sizeof(emit_params));
+	memset(&emit_cb, 0, sizeof(emit_cb));
+	diff_params.flags = XDF_NEED_MINIMAL;
+	if (ignorews)
+		diff_params.flags |= XDF_IGNORE_WHITESPACE;
+	emit_params.ctxlen = context > 0 ? context : 3;
+	emit_params.flags = XDL_EMIT_FUNCNAMES;
+	emit_cb.out_line = filediff_cb;
+	emit_cb.priv = fn;
+	xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
+	if (file1.size)
+		free(file1.ptr);
+	if (file2.size)
+		free(file2.ptr);
+	return 0;
+}
+
+void cgit_diff_tree(const struct object_id *old_oid,
+		    const struct object_id *new_oid,
+		    filepair_fn fn, const char *prefix, int ignorews)
+{
+	struct diff_options opt;
+	struct pathspec_item item;
+
+	memset(&item, 0, sizeof(item));
+	diff_setup(&opt);
+	opt.output_format = DIFF_FORMAT_CALLBACK;
+	opt.detect_rename = 1;
+	opt.rename_limit = ctx.cfg.renamelimit;
+	opt.flags.recursive = 1;
+	if (ignorews)
+		DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
+	opt.format_callback = cgit_diff_tree_cb;
+	opt.format_callback_data = fn;
+	if (prefix) {
+		item.match = xstrdup(prefix);
+		item.len = strlen(prefix);
+		opt.pathspec.nr = 1;
+		opt.pathspec.items = &item;
+	}
+	diff_setup_done(&opt);
+
+	if (old_oid && !is_null_oid(old_oid))
+		diff_tree_oid(old_oid, new_oid, "", &opt);
+	else
+		diff_root_tree_oid(new_oid, "", &opt);
+	diffcore_std(&opt);
+	diff_flush(&opt);
+
+	free(item.match);
+}
+
+void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
+{
+	const struct object_id *old_oid = NULL;
+
+	if (commit->parents)
+		old_oid = &commit->parents->item->object.oid;
+	cgit_diff_tree(old_oid, &commit->object.oid, fn, prefix,
+		       ctx.qry.ignorews);
+}
+
+int cgit_parse_snapshots_mask(const char *str)
+{
+	struct string_list tokens = STRING_LIST_INIT_DUP;
+	struct string_list_item *item;
+	const struct cgit_snapshot_format *f;
+	int rv = 0;
+
+	/* favor legacy setting */
+	if (atoi(str))
+		return 1;
+
+	if (strcmp(str, "all") == 0)
+		return INT_MAX;
+
+	string_list_split(&tokens, str, ' ', -1);
+	string_list_remove_empty_items(&tokens, 0);
+
+	for_each_string_list_item(item, &tokens) {
+		for (f = cgit_snapshot_formats; f->suffix; f++) {
+			if (!strcmp(item->string, f->suffix) ||
+			    !strcmp(item->string, f->suffix + 1)) {
+				rv |= cgit_snapshot_format_bit(f);
+				break;
+			}
+		}
+	}
+
+	string_list_clear(&tokens, 0);
+	return rv;
+}
+
+typedef struct {
+	char * name;
+	char * value;
+} cgit_env_var;
+
+void cgit_prepare_repo_env(struct cgit_repo * repo)
+{
+	cgit_env_var env_vars[] = {
+		{ .name = "CGIT_REPO_URL", .value = repo->url },
+		{ .name = "CGIT_REPO_NAME", .value = repo->name },
+		{ .name = "CGIT_REPO_PATH", .value = repo->path },
+		{ .name = "CGIT_REPO_OWNER", .value = repo->owner },
+		{ .name = "CGIT_REPO_DEFBRANCH", .value = repo->defbranch },
+		{ .name = "CGIT_REPO_SECTION", .value = repo->section },
+		{ .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url }
+	};
+	int env_var_count = ARRAY_SIZE(env_vars);
+	cgit_env_var *p, *q;
+	static char *warn = "cgit warning: failed to set env: %s=%s\n";
+
+	p = env_vars;
+	q = p + env_var_count;
+	for (; p < q; p++)
+		if (p->value && setenv(p->name, p->value, 1))
+			fprintf(stderr, warn, p->name, p->value);
+}
+
+/* Read the content of the specified file into a newly allocated buffer,
+ * zeroterminate the buffer and return 0 on success, errno otherwise.
+ */
+int readfile(const char *path, char **buf, size_t *size)
+{
+	int fd, e;
+	struct stat st;
+
+	fd = open(path, O_RDONLY);
+	if (fd == -1)
+		return errno;
+	if (fstat(fd, &st)) {
+		e = errno;
+		close(fd);
+		return e;
+	}
+	if (!S_ISREG(st.st_mode)) {
+		close(fd);
+		return EISDIR;
+	}
+	*buf = xmalloc(st.st_size + 1);
+	*size = read_in_full(fd, *buf, st.st_size);
+	e = errno;
+	(*buf)[*size] = '\0';
+	close(fd);
+	return (*size == st.st_size ? 0 : e);
+}
+
+static int is_token_char(char c)
+{
+	return isalnum(c) || c == '_';
+}
+
+/* Replace name with getenv(name), return pointer to zero-terminating char
+ */
+static char *expand_macro(char *name, int maxlength)
+{
+	char *value;
+	size_t len;
+
+	len = 0;
+	value = getenv(name);
+	if (value) {
+		len = strlen(value) + 1;
+		if (len > maxlength)
+			len = maxlength;
+		strlcpy(name, value, len);
+		--len;
+	}
+	return name + len;
+}
+
+#define EXPBUFSIZE (1024 * 8)
+
+/* Replace all tokens prefixed by '$' in the specified text with the
+ * value of the named environment variable.
+ * NB: the return value is a static buffer, i.e. it must be strdup'd
+ * by the caller.
+ */
+char *expand_macros(const char *txt)
+{
+	static char result[EXPBUFSIZE];
+	char *p, *start;
+	int len;
+
+	p = result;
+	start = NULL;
+	while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
+		*p = *txt;
+		if (start) {
+			if (!is_token_char(*txt)) {
+				if (p - start > 0) {
+					*p = '\0';
+					len = result + EXPBUFSIZE - start - 1;
+					p = expand_macro(start, len) - 1;
+				}
+				start = NULL;
+				txt--;
+			}
+			p++;
+			txt++;
+			continue;
+		}
+		if (*txt == '$') {
+			start = p;
+			txt++;
+			continue;
+		}
+		p++;
+		txt++;
+	}
+	*p = '\0';
+	if (start && p - start > 0) {
+		len = result + EXPBUFSIZE - start - 1;
+		p = expand_macro(start, len);
+		*p = '\0';
+	}
+	return result;
+}
+
+char *get_mimetype_for_filename(const char *filename)
+{
+	char *ext, *mimetype, *token, line[1024], *saveptr;
+	FILE *file;
+	struct string_list_item *mime;
+
+	if (!filename)
+		return NULL;
+
+	ext = strrchr(filename, '.');
+	if (!ext)
+		return NULL;
+	++ext;
+	if (!ext[0])
+		return NULL;
+	mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
+	if (mime)
+		return xstrdup(mime->util);
+
+	if (!ctx.cfg.mimetype_file)
+		return NULL;
+	file = fopen(ctx.cfg.mimetype_file, "r");
+	if (!file)
+		return NULL;
+	while (fgets(line, sizeof(line), file)) {
+		if (!line[0] || line[0] == '#')
+			continue;
+		mimetype = strtok_r(line, " \t\r\n", &saveptr);
+		while ((token = strtok_r(NULL, " \t\r\n", &saveptr))) {
+			if (!strcasecmp(ext, token)) {
+				fclose(file);
+				return xstrdup(mimetype);
+			}
+		}
+	}
+	fclose(file);
+	return NULL;
+}