neocgit

a more 'modern' version of cgit
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shared.c (13130B)


      1 /* shared.c: global vars + some callback functions
      2  *
      3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
      4  *
      5  * Licensed under GNU General Public License v2
      6  *   (see COPYING for full license text)
      7  */
      8 
      9 #include "cgit.h"
     10 
     11 struct cgit_repolist cgit_repolist;
     12 struct cgit_context ctx;
     13 
     14 int chk_zero(int result, char *msg)
     15 {
     16 	if (result != 0)
     17 		die_errno("%s", msg);
     18 	return result;
     19 }
     20 
     21 int chk_positive(int result, char *msg)
     22 {
     23 	if (result <= 0)
     24 		die_errno("%s", msg);
     25 	return result;
     26 }
     27 
     28 int chk_non_negative(int result, char *msg)
     29 {
     30 	if (result < 0)
     31 		die_errno("%s", msg);
     32 	return result;
     33 }
     34 
     35 char *cgit_default_repo_desc = "[no description]";
     36 struct cgit_repo *cgit_add_repo(const char *url)
     37 {
     38 	struct cgit_repo *ret;
     39 
     40 	if (++cgit_repolist.count > cgit_repolist.length) {
     41 		if (cgit_repolist.length == 0)
     42 			cgit_repolist.length = 8;
     43 		else
     44 			cgit_repolist.length *= 2;
     45 		cgit_repolist.repos = xrealloc(cgit_repolist.repos,
     46 					       cgit_repolist.length *
     47 					       sizeof(struct cgit_repo));
     48 	}
     49 
     50 	ret = &cgit_repolist.repos[cgit_repolist.count-1];
     51 	memset(ret, 0, sizeof(struct cgit_repo));
     52 	ret->url = trim_end(url, '/');
     53 	ret->name = ret->url;
     54 	ret->path = NULL;
     55 	ret->desc = cgit_default_repo_desc;
     56 	ret->owner = NULL;
     57 	ret->homepage = NULL;
     58 	ret->section = ctx.cfg.section;
     59 	ret->snapshots = ctx.cfg.snapshots;
     60 	ret->enable_commit_graph = ctx.cfg.enable_commit_graph;
     61 	ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
     62 	ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
     63 	ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
     64 	ret->enable_subject_links = ctx.cfg.enable_subject_links;
     65 	ret->enable_html_serving = ctx.cfg.enable_html_serving;
     66 	ret->max_stats = ctx.cfg.max_stats;
     67 	ret->branch_sort = ctx.cfg.branch_sort;
     68 	ret->commit_sort = ctx.cfg.commit_sort;
     69 	ret->module_link = ctx.cfg.module_link;
     70 	ret->readme = ctx.cfg.readme;
     71 	ret->mtime = -1;
     72 	ret->about_filter = ctx.cfg.about_filter;
     73 	ret->commit_filter = ctx.cfg.commit_filter;
     74 	ret->source_filter = ctx.cfg.source_filter;
     75 	ret->email_filter = ctx.cfg.email_filter;
     76 	ret->owner_filter = ctx.cfg.owner_filter;
     77 	ret->clone_url = ctx.cfg.clone_url;
     78 	ret->submodules.strdup_strings = 1;
     79 	ret->hide = ret->ignore = 0;
     80 	return ret;
     81 }
     82 
     83 struct cgit_repo *cgit_get_repoinfo(const char *url)
     84 {
     85 	int i;
     86 	struct cgit_repo *repo;
     87 
     88 	for (i = 0; i < cgit_repolist.count; i++) {
     89 		repo = &cgit_repolist.repos[i];
     90 		if (repo->ignore)
     91 			continue;
     92 		if (!strcmp(repo->url, url))
     93 			return repo;
     94 	}
     95 	return NULL;
     96 }
     97 
     98 void cgit_free_commitinfo(struct commitinfo *info)
     99 {
    100 	free(info->author);
    101 	free(info->author_email);
    102 	free(info->committer);
    103 	free(info->committer_email);
    104 	free(info->subject);
    105 	free(info->msg);
    106 	free(info->msg_encoding);
    107 	free(info);
    108 }
    109 
    110 char *trim_end(const char *str, char c)
    111 {
    112 	int len;
    113 
    114 	if (str == NULL)
    115 		return NULL;
    116 	len = strlen(str);
    117 	while (len > 0 && str[len - 1] == c)
    118 		len--;
    119 	if (len == 0)
    120 		return NULL;
    121 	return xstrndup(str, len);
    122 }
    123 
    124 char *ensure_end(const char *str, char c)
    125 {
    126 	size_t len = strlen(str);
    127 	char *result;
    128 
    129 	if (len && str[len - 1] == c)
    130 		return xstrndup(str, len);
    131 
    132 	result = xmalloc(len + 2);
    133 	memcpy(result, str, len);
    134 	result[len] = '/';
    135 	result[len + 1] = '\0';
    136 	return result;
    137 }
    138 
    139 void strbuf_ensure_end(struct strbuf *sb, char c)
    140 {
    141 	if (!sb->len || sb->buf[sb->len - 1] != c)
    142 		strbuf_addch(sb, c);
    143 }
    144 
    145 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
    146 {
    147 	size_t size;
    148 
    149 	if (list->count >= list->alloc) {
    150 		list->alloc += (list->alloc ? list->alloc : 4);
    151 		size = list->alloc * sizeof(struct refinfo *);
    152 		list->refs = xrealloc(list->refs, size);
    153 	}
    154 	list->refs[list->count++] = ref;
    155 }
    156 
    157 static struct refinfo *cgit_mk_refinfo(const char *refname, const struct object_id *oid)
    158 {
    159 	struct refinfo *ref;
    160 
    161 	ref = xmalloc(sizeof (struct refinfo));
    162 	ref->refname = xstrdup(refname);
    163 	ref->object = parse_object(oid);
    164 	switch (ref->object->type) {
    165 	case OBJ_TAG:
    166 		ref->tag = cgit_parse_tag((struct tag *)ref->object);
    167 		break;
    168 	case OBJ_COMMIT:
    169 		ref->commit = cgit_parse_commit((struct commit *)ref->object);
    170 		break;
    171 	}
    172 	return ref;
    173 }
    174 
    175 void cgit_free_taginfo(struct taginfo *tag)
    176 {
    177 	if (tag->tagger)
    178 		free(tag->tagger);
    179 	if (tag->tagger_email)
    180 		free(tag->tagger_email);
    181 	if (tag->msg)
    182 		free(tag->msg);
    183 	free(tag);
    184 }
    185 
    186 static void cgit_free_refinfo(struct refinfo *ref)
    187 {
    188 	if (ref->refname)
    189 		free((char *)ref->refname);
    190 	switch (ref->object->type) {
    191 	case OBJ_TAG:
    192 		cgit_free_taginfo(ref->tag);
    193 		break;
    194 	case OBJ_COMMIT:
    195 		cgit_free_commitinfo(ref->commit);
    196 		break;
    197 	}
    198 	free(ref);
    199 }
    200 
    201 void cgit_free_reflist_inner(struct reflist *list)
    202 {
    203 	int i;
    204 
    205 	for (i = 0; i < list->count; i++) {
    206 		cgit_free_refinfo(list->refs[i]);
    207 	}
    208 	free(list->refs);
    209 }
    210 
    211 int cgit_refs_cb(const char *refname, const struct object_id *oid, int flags,
    212 		  void *cb_data)
    213 {
    214 	struct reflist *list = (struct reflist *)cb_data;
    215 	struct refinfo *info = cgit_mk_refinfo(refname, oid);
    216 
    217 	if (info)
    218 		cgit_add_ref(list, info);
    219 	return 0;
    220 }
    221 
    222 void cgit_diff_tree_cb(struct diff_queue_struct *q,
    223 		       struct diff_options *options, void *data)
    224 {
    225 	int i;
    226 
    227 	for (i = 0; i < q->nr; i++) {
    228 		if (q->queue[i]->status == 'U')
    229 			continue;
    230 		((filepair_fn)data)(q->queue[i]);
    231 	}
    232 }
    233 
    234 static int load_mmfile(mmfile_t *file, const struct object_id *oid)
    235 {
    236 	enum object_type type;
    237 
    238 	if (is_null_oid(oid)) {
    239 		file->ptr = (char *)"";
    240 		file->size = 0;
    241 	} else {
    242 		file->ptr = read_object_file(oid, &type,
    243 		                           (unsigned long *)&file->size);
    244 	}
    245 	return 1;
    246 }
    247 
    248 /*
    249  * Receive diff-buffers from xdiff and concatenate them as
    250  * needed across multiple callbacks.
    251  *
    252  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
    253  * ripped from git and modified to use globals instead of
    254  * a special callback-struct.
    255  */
    256 static char *diffbuf = NULL;
    257 static int buflen = 0;
    258 
    259 static int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
    260 {
    261 	int i;
    262 
    263 	for (i = 0; i < nbuf; i++) {
    264 		if (mb[i].ptr[mb[i].size-1] != '\n') {
    265 			/* Incomplete line */
    266 			diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
    267 			memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
    268 			buflen += mb[i].size;
    269 			continue;
    270 		}
    271 
    272 		/* we have a complete line */
    273 		if (!diffbuf) {
    274 			((linediff_fn)priv)(mb[i].ptr, mb[i].size);
    275 			continue;
    276 		}
    277 		diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
    278 		memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
    279 		((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
    280 		free(diffbuf);
    281 		diffbuf = NULL;
    282 		buflen = 0;
    283 	}
    284 	if (diffbuf) {
    285 		((linediff_fn)priv)(diffbuf, buflen);
    286 		free(diffbuf);
    287 		diffbuf = NULL;
    288 		buflen = 0;
    289 	}
    290 	return 0;
    291 }
    292 
    293 int cgit_diff_files(const struct object_id *old_oid,
    294 		    const struct object_id *new_oid, unsigned long *old_size,
    295 		    unsigned long *new_size, int *binary, int context,
    296 		    int ignorews, linediff_fn fn)
    297 {
    298 	mmfile_t file1, file2;
    299 	xpparam_t diff_params;
    300 	xdemitconf_t emit_params;
    301 	xdemitcb_t emit_cb;
    302 
    303 	if (!load_mmfile(&file1, old_oid) || !load_mmfile(&file2, new_oid))
    304 		return 1;
    305 
    306 	*old_size = file1.size;
    307 	*new_size = file2.size;
    308 
    309 	if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
    310 	    (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
    311 		*binary = 1;
    312 		if (file1.size)
    313 			free(file1.ptr);
    314 		if (file2.size)
    315 			free(file2.ptr);
    316 		return 0;
    317 	}
    318 
    319 	memset(&diff_params, 0, sizeof(diff_params));
    320 	memset(&emit_params, 0, sizeof(emit_params));
    321 	memset(&emit_cb, 0, sizeof(emit_cb));
    322 	diff_params.flags = XDF_NEED_MINIMAL;
    323 	if (ignorews)
    324 		diff_params.flags |= XDF_IGNORE_WHITESPACE;
    325 	emit_params.ctxlen = context > 0 ? context : 3;
    326 	emit_params.flags = XDL_EMIT_FUNCNAMES;
    327 	emit_cb.outf = filediff_cb;
    328 	emit_cb.priv = fn;
    329 	xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
    330 	if (file1.size)
    331 		free(file1.ptr);
    332 	if (file2.size)
    333 		free(file2.ptr);
    334 	return 0;
    335 }
    336 
    337 void cgit_diff_tree(const struct object_id *old_oid,
    338 		    const struct object_id *new_oid,
    339 		    filepair_fn fn, const char *prefix, int ignorews)
    340 {
    341 	struct diff_options opt;
    342 	struct pathspec_item item;
    343 
    344 	memset(&item, 0, sizeof(item));
    345 	diff_setup(&opt);
    346 	opt.output_format = DIFF_FORMAT_CALLBACK;
    347 	opt.detect_rename = 1;
    348 	opt.rename_limit = ctx.cfg.renamelimit;
    349 	opt.flags.recursive = 1;
    350 	if (ignorews)
    351 		DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
    352 	opt.format_callback = cgit_diff_tree_cb;
    353 	opt.format_callback_data = fn;
    354 	if (prefix) {
    355 		item.match = xstrdup(prefix);
    356 		item.len = strlen(prefix);
    357 		opt.pathspec.nr = 1;
    358 		opt.pathspec.items = &item;
    359 	}
    360 	diff_setup_done(&opt);
    361 
    362 	if (old_oid && !is_null_oid(old_oid))
    363 		diff_tree_oid(old_oid, new_oid, "", &opt);
    364 	else
    365 		diff_root_tree_oid(new_oid, "", &opt);
    366 	diffcore_std(&opt);
    367 	diff_flush(&opt);
    368 
    369 	free(item.match);
    370 }
    371 
    372 void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
    373 {
    374 	const struct object_id *old_oid = NULL;
    375 
    376 	if (commit->parents)
    377 		old_oid = &commit->parents->item->object.oid;
    378 	cgit_diff_tree(old_oid, &commit->object.oid, fn, prefix,
    379 		       ctx.qry.ignorews);
    380 }
    381 
    382 int cgit_parse_snapshots_mask(const char *str)
    383 {
    384 	struct string_list tokens = STRING_LIST_INIT_DUP;
    385 	struct string_list_item *item;
    386 	const struct cgit_snapshot_format *f;
    387 	int rv = 0;
    388 
    389 	/* favor legacy setting */
    390 	if (atoi(str))
    391 		return 1;
    392 
    393 	if (strcmp(str, "all") == 0)
    394 		return INT_MAX;
    395 
    396 	string_list_split(&tokens, str, ' ', -1);
    397 	string_list_remove_empty_items(&tokens, 0);
    398 
    399 	for_each_string_list_item(item, &tokens) {
    400 		for (f = cgit_snapshot_formats; f->suffix; f++) {
    401 			if (!strcmp(item->string, f->suffix) ||
    402 			    !strcmp(item->string, f->suffix + 1)) {
    403 				rv |= cgit_snapshot_format_bit(f);
    404 				break;
    405 			}
    406 		}
    407 	}
    408 
    409 	string_list_clear(&tokens, 0);
    410 	return rv;
    411 }
    412 
    413 typedef struct {
    414 	char * name;
    415 	char * value;
    416 } cgit_env_var;
    417 
    418 void cgit_prepare_repo_env(struct cgit_repo * repo)
    419 {
    420 	cgit_env_var env_vars[] = {
    421 		{ .name = "CGIT_REPO_URL", .value = repo->url },
    422 		{ .name = "CGIT_REPO_NAME", .value = repo->name },
    423 		{ .name = "CGIT_REPO_PATH", .value = repo->path },
    424 		{ .name = "CGIT_REPO_OWNER", .value = repo->owner },
    425 		{ .name = "CGIT_REPO_DEFBRANCH", .value = repo->defbranch },
    426 		{ .name = "CGIT_REPO_SECTION", .value = repo->section },
    427 		{ .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url }
    428 	};
    429 	int env_var_count = ARRAY_SIZE(env_vars);
    430 	cgit_env_var *p, *q;
    431 	static char *warn = "cgit warning: failed to set env: %s=%s\n";
    432 
    433 	p = env_vars;
    434 	q = p + env_var_count;
    435 	for (; p < q; p++)
    436 		if (p->value && setenv(p->name, p->value, 1))
    437 			fprintf(stderr, warn, p->name, p->value);
    438 }
    439 
    440 /* Read the content of the specified file into a newly allocated buffer,
    441  * zeroterminate the buffer and return 0 on success, errno otherwise.
    442  */
    443 int readfile(const char *path, char **buf, size_t *size)
    444 {
    445 	int fd, e;
    446 	struct stat st;
    447 
    448 	fd = open(path, O_RDONLY);
    449 	if (fd == -1)
    450 		return errno;
    451 	if (fstat(fd, &st)) {
    452 		e = errno;
    453 		close(fd);
    454 		return e;
    455 	}
    456 	if (!S_ISREG(st.st_mode)) {
    457 		close(fd);
    458 		return EISDIR;
    459 	}
    460 	*buf = xmalloc(st.st_size + 1);
    461 	*size = read_in_full(fd, *buf, st.st_size);
    462 	e = errno;
    463 	(*buf)[*size] = '\0';
    464 	close(fd);
    465 	return (*size == st.st_size ? 0 : e);
    466 }
    467 
    468 static int is_token_char(char c)
    469 {
    470 	return isalnum(c) || c == '_';
    471 }
    472 
    473 /* Replace name with getenv(name), return pointer to zero-terminating char
    474  */
    475 static char *expand_macro(char *name, int maxlength)
    476 {
    477 	char *value;
    478 	int len;
    479 
    480 	len = 0;
    481 	value = getenv(name);
    482 	if (value) {
    483 		len = strlen(value);
    484 		if (len > maxlength)
    485 			len = maxlength;
    486 		strncpy(name, value, len);
    487 	}
    488 	return name + len;
    489 }
    490 
    491 #define EXPBUFSIZE (1024 * 8)
    492 
    493 /* Replace all tokens prefixed by '$' in the specified text with the
    494  * value of the named environment variable.
    495  * NB: the return value is a static buffer, i.e. it must be strdup'd
    496  * by the caller.
    497  */
    498 char *expand_macros(const char *txt)
    499 {
    500 	static char result[EXPBUFSIZE];
    501 	char *p, *start;
    502 	int len;
    503 
    504 	p = result;
    505 	start = NULL;
    506 	while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
    507 		*p = *txt;
    508 		if (start) {
    509 			if (!is_token_char(*txt)) {
    510 				if (p - start > 0) {
    511 					*p = '\0';
    512 					len = result + EXPBUFSIZE - start - 1;
    513 					p = expand_macro(start, len) - 1;
    514 				}
    515 				start = NULL;
    516 				txt--;
    517 			}
    518 			p++;
    519 			txt++;
    520 			continue;
    521 		}
    522 		if (*txt == '$') {
    523 			start = p;
    524 			txt++;
    525 			continue;
    526 		}
    527 		p++;
    528 		txt++;
    529 	}
    530 	*p = '\0';
    531 	if (start && p - start > 0) {
    532 		len = result + EXPBUFSIZE - start - 1;
    533 		p = expand_macro(start, len);
    534 		*p = '\0';
    535 	}
    536 	return result;
    537 }
    538 
    539 char *get_mimetype_for_filename(const char *filename)
    540 {
    541 	char *ext, *mimetype, *token, line[1024], *saveptr;
    542 	FILE *file;
    543 	struct string_list_item *mime;
    544 
    545 	if (!filename)
    546 		return NULL;
    547 
    548 	ext = strrchr(filename, '.');
    549 	if (!ext)
    550 		return NULL;
    551 	++ext;
    552 	if (!ext[0])
    553 		return NULL;
    554 	mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
    555 	if (mime)
    556 		return xstrdup(mime->util);
    557 
    558 	if (!ctx.cfg.mimetype_file)
    559 		return NULL;
    560 	file = fopen(ctx.cfg.mimetype_file, "r");
    561 	if (!file)
    562 		return NULL;
    563 	while (fgets(line, sizeof(line), file)) {
    564 		if (!line[0] || line[0] == '#')
    565 			continue;
    566 		mimetype = strtok_r(line, " \t\r\n", &saveptr);
    567 		while ((token = strtok_r(NULL, " \t\r\n", &saveptr))) {
    568 			if (!strcasecmp(ext, token)) {
    569 				fclose(file);
    570 				return xstrdup(mimetype);
    571 			}
    572 		}
    573 	}
    574 	fclose(file);
    575 	return NULL;
    576 }