/* 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; 	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 = xcalloc(1, sizeof(*item));		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);} 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){

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