/* 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->owner = NULL;
ret->homepage = NULL;
ret->section = ctx.cfg.section;
ret->snapshots = ctx.cfg.snapshots;
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);
}
char *strlpart(char *txt, int maxlen)
{
char *result;
if (!txt)
return txt;
if (strlen(txt) <= maxlen)
return txt;
result = xmalloc(maxlen + 1);
memcpy(result, txt, maxlen - 3);
result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
result[maxlen] = '\0';
return result;
}
char *strrpart(char *txt, int maxlen)
{
char *result;
if (!txt)
return txt;
if (strlen(txt) <= maxlen)
return txt;
result = xmalloc(maxlen + 1);
memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
result[0] = result[1] = result[2] = '.';
return result;
}
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(oid->hash);
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_sha1_file(oid->hash, &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.outf = 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;
DIFF_OPT_SET(&opt, RECURSIVE);
if (ignorews)
DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
opt.format_callback = cgit_diff_tree_cb;
opt.format_callback_data = fn;
if (prefix) {
item.match = 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_sha1(old_oid->hash, new_oid->hash, "", &opt);
else
diff_root_tree_sha1(new_oid->hash, "", &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;
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 |= f->bit;
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;
int len;
len = 0;
value = getenv(name);
if (value) {
len = strlen(value);
if (len > maxlength)
len = maxlength;
strncpy(name, value, 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;
}
