cgit/shared.c
Jason A. Donenfeld 389cc17357 Add branch-sort and repo.branch-sort options.
When set to "name", branches are sorted by name, which is the current
default. When set to "age", branches are sorted by the age of the
repository.

This feature was requested by Konstantin Ryabitsev for use on
kernel.org.

Proposed-by: Konstantin Ryabitsev <mricon@kernel.org>
2013-04-10 14:48:26 +02:00

592 lines
13 KiB
C

/* shared.c: global vars + some callback functions
*
* Copyright (C) 2006 Lars Hjemli
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
#include <stdio.h>
struct cgit_repolist cgit_repolist;
struct cgit_context ctx;
int chk_zero(int result, char *msg)
{
if (result != 0)
die("%s: %s", msg, strerror(errno));
return result;
}
int chk_positive(int result, char *msg)
{
if (result <= 0)
die("%s: %s", msg, strerror(errno));
return result;
}
int chk_non_negative(int result, char *msg)
{
if (result < 0)
die("%s: %s", msg, strerror(errno));
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->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->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->clone_url = ctx.cfg.clone_url;
ret->submodules.strdup_strings = 1;
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 (!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);
return NULL;
}
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 unsigned char *sha1)
{
struct refinfo *ref;
ref = xmalloc(sizeof (struct refinfo));
ref->refname = xstrdup(refname);
ref->object = parse_object(sha1);
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;
}
static 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 unsigned char *sha1, int flags,
void *cb_data)
{
struct reflist *list = (struct reflist *)cb_data;
struct refinfo *info = cgit_mk_refinfo(refname, sha1);
if (info)
cgit_add_ref(list, info);
return 0;
}
static 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 unsigned char *sha1)
{
enum object_type type;
if (is_null_sha1(sha1)) {
file->ptr = (char *)"";
file->size = 0;
} else {
file->ptr = read_sha1_file(sha1, &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.
*/
char *diffbuf = NULL;
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 unsigned char *old_sha1,
const unsigned char *new_sha1, 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_sha1) || !load_mmfile(&file2, new_sha1))
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 unsigned char *old_sha1,
const unsigned char *new_sha1,
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;
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_sha1 && !is_null_sha1(old_sha1))
diff_tree_sha1(old_sha1, new_sha1, "", &opt);
else
diff_root_tree_sha1(new_sha1, "", &opt);
diffcore_std(&opt);
diff_flush(&opt);
}
void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
{
unsigned char *old_sha1 = NULL;
if (commit->parents)
old_sha1 = commit->parents->item->object.sha1;
cgit_diff_tree(old_sha1, commit->object.sha1, fn, prefix,
ctx.qry.ignorews);
}
int cgit_parse_snapshots_mask(const char *str)
{
const struct cgit_snapshot_format *f;
static const char *delim = " \t,:/|;";
int tl, sl, rv = 0;
/* favor legacy setting */
if (atoi(str))
return 1;
for (;;) {
str += strspn(str, delim);
tl = strcspn(str, delim);
if (!tl)
break;
for (f = cgit_snapshot_formats; f->suffix; f++) {
sl = strlen(f->suffix);
if ((tl == sl && !strncmp(f->suffix, str, tl)) ||
(tl == sl - 1 && !strncmp(f->suffix + 1, str, tl - 1))) {
rv |= f->bit;
break;
}
}
str += tl;
}
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);
}
int cgit_open_filter(struct cgit_filter *filter)
{
filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
"Unable to duplicate STDOUT");
chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
if (filter->pid == 0) {
close(filter->pipe_fh[1]);
chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
"Unable to use pipe as STDIN");
execvp(filter->cmd, filter->argv);
die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
strerror(errno), errno);
}
close(filter->pipe_fh[0]);
chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
"Unable to use pipe as STDOUT");
close(filter->pipe_fh[1]);
return 0;
}
int cgit_close_filter(struct cgit_filter *filter)
{
chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
"Unable to restore STDOUT");
close(filter->old_stdout);
if (filter->pid < 0)
return 0;
waitpid(filter->pid, &filter->exitstatus, 0);
if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
return 0;
die("Subprocess %s exited abnormally", filter->cmd);
}
/* 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;
}