/* cgit.c: cgi for the git scm
*
* Copyright (C) 2006 Lars Hjemli
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
#include "cache.h"
#include "cmd.h"
#include "configfile.h"
#include "html.h"
#include "ui-shared.h"
#include "ui-stats.h"
#include "scan-tree.h"
const char *cgit_version = CGIT_VERSION;
void add_mimetype(const char *name, const char *value)
{
struct string_list_item *item;
item = string_list_insert(xstrdup(name), &ctx.cfg.mimetypes);
item->util = xstrdup(value);
}
struct cgit_filter *new_filter(const char *cmd, int extra_args)
{
struct cgit_filter *f;
if (!cmd || !cmd[0])
return NULL;
f = xmalloc(sizeof(struct cgit_filter));
f->cmd = xstrdup(cmd);
f->argv = xmalloc((2 + extra_args) * sizeof(char *));
f->argv[0] = f->cmd;
f->argv[1] = NULL;
return f;
}
static void process_cached_repolist(const char *path);
void repo_config(struct cgit_repo *repo, const char *name, const char *value)
{
if (!strcmp(name, "name"))
repo->name = xstrdup(value);
else if (!strcmp(name, "clone-url"))
repo->clone_url = xstrdup(value);
else if (!strcmp(name, "desc"))
repo->desc = xstrdup(value);
else if (!strcmp(name, "owner"))
repo->owner = xstrdup(value);
else if (!strcmp(name, "defbranch"))
repo->defbranch = xstrdup(value);
else if (!strcmp(name, "snapshots"))
repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
else if (!strcmp(name, "enable-log-filecount"))
repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
else if (!strcmp(name, "enable-log-linecount"))
repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
else if (!strcmp(name, "max-stats"))
repo->max_stats = cgit_find_stats_period(value, NULL);
else if (!strcmp(name, "module-link"))
repo->module_link= xstrdup(value);
else if (!strcmp(name, "section"))
repo->section = xstrdup(value);
else if (!strcmp(name, "readme") && value != NULL) {
if (*value == '/')
ctx.repo->readme = xstrdup(value);
else
ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
} else if (ctx.cfg.enable_filter_overrides) {
if (!strcmp(name, "about-filter"))
repo->about_filter = new_filter(value, 0);
else if (!strcmp(name, "commit-filter"))
repo->commit_filter = new_filter(value, 0);
else if (!strcmp(name, "source-filter"))
repo->source_filter = new_filter(value, 1);
}
}
void config_cb(const char *name, const char *value)
{
if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
ctx.cfg.section = xstrdup(value);
else if (!strcmp(name, "repo.url"))
ctx.repo = cgit_add_repo(value);
else if (ctx.repo && !strcmp(name, "repo.path"))
ctx.repo->path = trim_end(value, '/');
else if (ctx.repo && !prefixcmp(name, "repo."))
repo_config(ctx.repo, name + 5, value);
else if (!strcmp(name, "root-title"))
ctx.cfg.root_title = xstrdup(value);
else if (!strcmp(name, "root-desc"))
ctx.cfg.root_desc = xstrdup(value);
else if (!strcmp(name, "root-readme"))
ctx.cfg.root_readme = xstrdup(value);
else if (!strcmp(name, "css"))
ctx.cfg.css = xstrdup(value);
else if (!strcmp(name, "favicon"))
ctx.cfg.favicon = xstrdup(value);
else if (!strcmp(name, "footer"))
ctx.cfg.footer = xstrdup(value);
else if (!strcmp(name, "head-include"))
ctx.cfg.head_include = xstrdup(value);
else if (!strcmp(name, "header"))
ctx.cfg.header = xstrdup(value);
else if (!strcmp(name, "logo"))
ctx.cfg.logo = xstrdup(value);
else if (!strcmp(name, "index-header"))
ctx.cfg.index_header = xstrdup(value);
else if (!strcmp(name, "index-info"))
ctx.cfg.index_info = xstrdup(value);
else if (!strcmp(name, "logo-link"))
ctx.cfg.logo_link = xstrdup(value);
else if (!strcmp(name, "module-link"))
ctx.cfg.module_link = xstrdup(value);
else if (!strcmp(name, "virtual-root")) {
ctx.cfg.virtual_root = trim_end(value, '/');
if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
ctx.cfg.virtual_root = "";
} else if (!strcmp(name, "nocache"))
ctx.cfg.nocache = atoi(value);
else if (!strcmp(name, "noplainemail"))
ctx.cfg.noplainemail = atoi(value);
else if (!strcmp(name, "noheader"))
ctx.cfg.noheader = atoi(value);
else if (!strcmp(name, "snapshots"))
ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
else if (!strcmp(name, "enable-filter-overrides"))
ctx.cfg.enable_filter_overrides = atoi(value);
else if (!strcmp(name, "enable-index-links"))
ctx.cfg.enable_index_links = atoi(value);
else if (!strcmp(name, "enable-log-filecount"))
ctx.cfg.enable_log_filecount = atoi(value);
else if (!strcmp(name, "enable-log-linecount"))
ctx.cfg.enable_log_linecount = atoi(value);
else if (!strcmp(name, "max-stats"))
ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
else if (!strcmp(name, "cache-size"))
ctx.cfg.cache_size = atoi(value);
else if (!strcmp(name, "cache-root"))
ctx.cfg.cache_root = xstrdup(value);
else if (!strcmp(name, "cache-root-ttl"))
ctx.cfg.cache_root_ttl = atoi(value);
else if (!strcmp(name, "cache-repo-ttl"))
ctx.cfg.cache_repo_ttl = atoi(value);
else if (!strcmp(name, "cache-scanrc-ttl"))
ctx.cfg.cache_scanrc_ttl = atoi(value);
else if (!strcmp(name, "cache-static-ttl"))
ctx.cfg.cache_static_ttl = atoi(value);
else if (!strcmp(name, "cache-dynamic-ttl"))
ctx.cfg.cache_dynamic_ttl = atoi(value);
else if (!strcmp(name, "about-filter"))
ctx.cfg.about_filter = new_filter(value, 0);
else if (!strcmp(name, "commit-filter"))
ctx.cfg.commit_filter = new_filter(value, 0);
else if (!strcmp(name, "embedded"))
ctx.cfg.embedded = atoi(value);
else if (!strcmp(name, "max-message-length"))
ctx.cfg.max_msg_len = atoi(value);
else if (!strcmp(name, "max-repodesc-length"))
ctx.cfg.max_repodesc_len = atoi(value);
else if (!strcmp(name, "max-repo-count"))
ctx.cfg.max_repo_count = atoi(value);
else if (!strcmp(name, "max-commit-count"))
ctx.cfg.max_commit_count = atoi(value);
else if (!strcmp(name, "scan-path"))
if (!ctx.cfg.nocache && ctx.cfg.cache_size)
process_cached_repolist(value);
else
scan_tree(value, repo_config);
else if (!strcmp(name, "source-filter"))
ctx.cfg.source_filter = new_filter(value, 1);
else if (!strcmp(name, "summary-log"))
ctx.cfg.summary_log = atoi(value);
else if (!strcmp(name, "summary-branches"))
ctx.cfg.summary_branches = atoi(value);
else if (!strcmp(name, "summary-tags"))
ctx.cfg.summary_tags = atoi(value);
else if (!strcmp(name, "agefile"))
ctx.cfg.agefile = xstrdup(value);
else if (!strcmp(name, "renamelimit"))
ctx.cfg.renamelimit = atoi(value);
else if (!strcmp(name, "robots"))
ctx.cfg.robots = xstrdup(value);
else if (!strcmp(name, "clone-prefix"))
ctx.cfg.clone_prefix = xstrdup(value);
else if (!strcmp(name, "local-time"))
ctx.cfg.local_time = atoi(value);
else if (!prefixcmp(name, "mimetype."))
add_mimetype(name + 9, value);
else if (!strcmp(name, "include"))
parse_configfile(value, config_cb);
}
static void querystring_cb(const char *name, const char *value)
{
if (!value)
value = "";
if (!strcmp(name,"r")) {
ctx.qry.repo = xstrdup(value);
ctx.repo = cgit_get_repoinfo(value);
} else if (!strcmp(name, "p")) {
ctx.qry.page = xstrdup(value);
} else if (!strcmp(name, "url")) {
ctx.qry.url = xstrdup(value);
cgit_parse_url(value);
} else if (!strcmp(name, "qt")) {
ctx.qry.grep = xstrdup(value);
} else if (!strcmp(name, "q")) {
ctx.qry.search = xstrdup(value);
} else if (!strcmp(name, "h")) {
ctx.qry.head = xstrdup(value);
ctx.qry.has_symref = 1;
} else if (!strcmp(name, "id")) {
ctx.qry.sha1 = xstrdup(value);
ctx.qry.has_sha1 = 1;
} else if (!strcmp(name, "id2")) {
ctx.qry.sha2 = xstrdup(value);
ctx.qry.has_sha1 = 1;
} else if (!strcmp(name, "ofs")) {
ctx.qry.ofs = atoi(value);
} else if (!strcmp(name, "path")) {
ctx.qry.path = trim_end(value, '/');
} else if (!strcmp(name, "name")) {
ctx.qry.name = xstrdup(value);
} else if (!strcmp(name, "mimetype")) {
ctx.qry.mimetype = xstrdup(value);
} else if (!strcmp(name, "s")){
ctx.qry.sort = xstrdup(value);
} else if (!strcmp(name, "showmsg")) {
ctx.qry.showmsg = atoi(value);
} else if (!strcmp(name, "period")) {
ctx.qry.period = xstrdup(value);
}
}
char *xstrdupn(const char *str)
{
return (str ? xstrdup(str) : NULL);
}
static void prepare_context(struct cgit_context *ctx)
{
memset(ctx, 0, sizeof(ctx));
ctx->cfg.agefile = "info/web/last-modified";
ctx->cfg.nocache = 0;
ctx->cfg.cache_size = 0;
ctx->cfg.cache_dynamic_ttl = 5;
ctx->cfg.cache_max_create_time = 5;
ctx->cfg.cache_repo_ttl = 5;
ctx->cfg.cache_root = CGIT_CACHE_ROOT;
ctx->cfg.cache_root_ttl = 5;
ctx->cfg.cache_scanrc_ttl = 15;
ctx->cfg.cache_static_ttl = -1;
ctx->cfg.css = "/cgit.css";
ctx->cfg.logo = "/cgit.png";
ctx->cfg.local_time = 0;
ctx->cfg.max_repo_count = 50;
ctx->cfg.max_commit_count = 50;
ctx->cfg.max_lock_attempts = 5;
ctx->cfg.max_msg_len = 80;
ctx->cfg.max_repodesc_len = 80;
ctx->cfg.max_stats = 0;
ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
ctx->cfg.renamelimit = -1;
ctx->cfg.robots = "index, nofollow";
ctx->cfg.root_title = "Git repository browser";
ctx->cfg.root_desc = "a fast webinterface for the git dscm";
ctx->cfg.script_name = CGIT_SCRIPT_NAME;
ctx->cfg.section = "";
ctx->cfg.summary_branches = 10;
ctx->cfg.summary_log = 10;
ctx->cfg.summary_tags = 10;
ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
ctx->env.https = xstrdupn(getenv("HTTPS"));
ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
ctx->page.mimetype = "text/html";
ctx->page.charset = PAGE_ENCODING;
ctx->page.filename = NULL;
ctx->page.size = 0;
ctx->page.modified = time(NULL);
ctx->page.expires = ctx->page.modified;
ctx->page.etag = NULL;
memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
if (ctx->env.script_name)
ctx->cfg.script_name = ctx->env.script_name;
if (ctx->env.query_string)
ctx->qry.raw = ctx->env.query_string;
if (!ctx->env.cgit_config)
ctx->env.cgit_config = CGIT_CONFIG;
}
struct refmatch {
char *req_ref;
char *first_ref;
int match;
};
int find_current_ref(const char *refname, const unsigned char *sha1,
int flags, void *cb_data)
{
struct refmatch *info;
info = (struct refmatch *)cb_data;
if (!strcmp(refname, info->req_ref))
info->match = 1;
if (!info->first_ref)
info->first_ref = xstrdup(refname);
return info->match;
}
char *find_default_branch(struct cgit_repo *repo)
{
struct refmatch info;
char *ref;
info.req_ref = repo->defbranch;
info.first_ref = NULL;
info.match = 0;
for_each_branch_ref(find_current_ref, &info);
if (info.match)
ref = info.req_ref;
else
ref = info.first_ref;
if (ref)
ref = xstrdup(ref);
return ref;
}
static int prepare_repo_cmd(struct cgit_context *ctx)
{
char *tmp;
unsigned char sha1[20];
int nongit = 0;
setenv("GIT_DIR", ctx->repo->path, 1);
setup_git_directory_gently(&nongit);
if (nongit) {
ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
"config error");
tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
ctx->repo = NULL;
cgit_print_http_headers(ctx);
cgit_print_docstart(ctx);
cgit_print_pageheader(ctx);
cgit_print_error(tmp);
cgit_print_docend();
return 1;
}
ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
if (!ctx->qry.head) {
ctx->qry.nohead = 1;
ctx->qry.head = find_default_branch(ctx->repo);
ctx->repo->defbranch = ctx->qry.head;
}
if (!ctx->qry.head) {
cgit_print_http_headers(ctx);
cgit_print_docstart(ctx);
cgit_print_pageheader(ctx);
cgit_print_error("Repository seems to be empty");
cgit_print_docend();
return 1;
}
if (get_sha1(ctx->qry.head, sha1)) {
tmp = xstrdup(ctx->qry.head);
ctx->qry.head = ctx->repo->defbranch;
ctx->page.status = 404;
ctx->page.statusmsg = "not found";
cgit_print_http_headers(ctx);
cgit_print_docstart(ctx);
cgit_print_pageheader(ctx);
cgit_print_error(fmt("Invalid branch: %s", tmp));
cgit_print_docend();
return 1;
}
return 0;
}
static void process_request(void *cbdata)
{
struct cgit_context *ctx = cbdata;
struct cgit_cmd *cmd;
cmd = cgit_get_cmd(ctx);
if (!cmd) {
ctx->page.title = "cgit error";
cgit_print_http_headers(ctx);
cgit_print_docstart(ctx);
cgit_print_pageheader(ctx);
cgit_print_error("Invalid request");
cgit_print_docend();
return;
}
if (cmd->want_repo && !ctx->repo) {
cgit_print_http_headers(ctx);
cgit_print_docstart(ctx);
cgit_print_pageheader(ctx);
cgit_print_error(fmt("No repository selected"));
cgit_print_docend();
return;
}
if (ctx->repo && prepare_repo_cmd(ctx))
return;
if (cmd->want_layout) {
cgit_print_http_headers(ctx);
cgit_print_docstart(ctx);
cgit_print_pageheader(ctx);
}
cmd->fn(ctx);
if (cmd->want_layout)
cgit_print_docend();
}
int cmp_repos(const void *a, const void *b)
{
const struct cgit_repo *ra = a, *rb = b;
return strcmp(ra->url, rb->url);
}
void print_repo(FILE *f, struct cgit_repo *repo)
{
fprintf(f, "repo.url=%s\n", repo->url);
fprintf(f, "repo.name=%s\n", repo->name);
fprintf(f, "repo.path=%s\n", repo->path);
if (repo->owner)
fprintf(f, "repo.owner=%s\n", repo->owner);
if (repo->desc)
fprintf(f, "repo.desc=%s\n", repo->desc);
if (repo->readme)
fprintf(f, "repo.readme=%s\n", repo->readme);
if (repo->defbranch)
fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
if (repo->module_link)
fprintf(f, "repo.module-link=%s\n", repo->module_link);
if (repo->section)
fprintf(f, "repo.section=%s\n", repo->section);
if (repo->clone_url)
fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
fprintf(f, "repo.enable-log-filecount=%d\n",
repo->enable_log_filecount);
fprintf(f, "repo.enable-log-linecount=%d\n",
repo->enable_log_linecount);
if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
fprintf(f, "\n");
}
void print_repolist(FILE *f, struct cgit_repolist *list, int start)
{
int i;
for(i = start; i < list->count; i++)
print_repo(f, &list->repos[i]);
}
/* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
* and return 0 on success.
*/
static int generate_cached_repolist(const char *path, const char *cached_rc)
{
char *locked_rc;
int idx;
FILE *f;
locked_rc = xstrdup(fmt("%s.lock", cached_rc));
f = fopen(locked_rc, "wx");
if (!f) {
/* Inform about the error unless the lockfile already existed,
* since that only means we've got concurrent requests.
*/
if (errno != EEXIST)
fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
locked_rc, strerror(errno), errno);
return errno;
}
idx = cgit_repolist.count;
scan_tree(path, repo_config);
print_repolist(f, &cgit_repolist, idx);
if (rename(locked_rc, cached_rc))
fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
locked_rc, cached_rc, strerror(errno), errno);
fclose(f);
return 0;
}
static void process_cached_repolist(const char *path)
{
struct stat st;
char *cached_rc;
time_t age;
cached_rc = xstrdup(fmt("%s/rc-%8x", ctx.cfg.cache_root,
hash_str(path)));
if (stat(cached_rc, &st)) {
/* Nothing is cached, we need to scan without forking. And
* if we fail to generate a cached repolist, we need to
* invoke scan_tree manually.
*/
if (generate_cached_repolist(path, cached_rc))
scan_tree(path, repo_config);
return;
}
parse_configfile(cached_rc, config_cb);
/* If the cached configfile hasn't expired, lets exit now */
age = time(NULL) - st.st_mtime;
if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
return;
/* The cached repolist has been parsed, but it was old. So lets
* rescan the specified path and generate a new cached repolist
* in a child-process to avoid latency for the current request.
*/
if (fork())
return;
exit(generate_cached_repolist(path, cached_rc));
}
static void cgit_parse_args(int argc, const char **argv)
{
int i;
int scan = 0;
for (i = 1; i < argc; i++) {
if (!strncmp(argv[i], "--cache=", 8)) {
ctx.cfg.cache_root = xstrdup(argv[i]+8);
}
if (!strcmp(argv[i], "--nocache")) {
ctx.cfg.nocache = 1;
}
if (!strcmp(argv[i], "--nohttp")) {
ctx.env.no_http = "1";
}
if (!strncmp(argv[i], "--query=", 8)) {
ctx.qry.raw = xstrdup(argv[i]+8);
}
if (!strncmp(argv[i], "--repo=", 7)) {
ctx.qry.repo = xstrdup(argv[i]+7);
}
if (!strncmp(argv[i], "--page=", 7)) {
ctx.qry.page = xstrdup(argv[i]+7);
}
if (!strncmp(argv[i], "--head=", 7)) {
ctx.qry.head = xstrdup(argv[i]+7);
ctx.qry.has_symref = 1;
}
if (!strncmp(argv[i], "--sha1=", 7)) {
ctx.qry.sha1 = xstrdup(argv[i]+7);
ctx.qry.has_sha1 = 1;
}
if (!strncmp(argv[i], "--ofs=", 6)) {
ctx.qry.ofs = atoi(argv[i]+6);
}
if (!strncmp(argv[i], "--scan-tree=", 12) ||
!strncmp(argv[i], "--scan-path=", 12)) {
scan++;
scan_tree(argv[i] + 12, repo_config);
}
}
if (scan) {
qsort(cgit_repolist.repos, cgit_repolist.count,
sizeof(struct cgit_repo), cmp_repos);
print_repolist(stdout, &cgit_repolist, 0);
exit(0);
}
}
static int calc_ttl()
{
if (!ctx.repo)
return ctx.cfg.cache_root_ttl;
if (!ctx.qry.page)
return ctx.cfg.cache_repo_ttl;
if (ctx.qry.has_symref)
return ctx.cfg.cache_dynamic_ttl;
if (ctx.qry.has_sha1)
return ctx.cfg.cache_static_ttl;
return ctx.cfg.cache_repo_ttl;
}
int main(int argc, const char **argv)
{
const char *path;
char *qry;
int err, ttl;
prepare_context(&ctx);
cgit_repolist.length = 0;
cgit_repolist.count = 0;
cgit_repolist.repos = NULL;
cgit_parse_args(argc, argv);
parse_configfile(ctx.env.cgit_config, config_cb);
ctx.repo = NULL;
http_parse_querystring(ctx.qry.raw, querystring_cb);
/* If virtual-root isn't specified in cgitrc, lets pretend
* that virtual-root equals SCRIPT_NAME.
*/
if (!ctx.cfg.virtual_root)
ctx.cfg.virtual_root = ctx.cfg.script_name;
/* If no url parameter is specified on the querystring, lets
* use PATH_INFO as url. This allows cgit to work with virtual
* urls without the need for rewriterules in the webserver (as
* long as PATH_INFO is included in the cache lookup key).
*/
path = ctx.env.path_info;
if (!ctx.qry.url && path) {
if (path[0] == '/')
path++;
ctx.qry.url = xstrdup(path);
if (ctx.qry.raw) {
qry = ctx.qry.raw;
ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
free(qry);
} else
ctx.qry.raw = xstrdup(ctx.qry.url);
cgit_parse_url(ctx.qry.url);
}
ttl = calc_ttl();
ctx.page.expires += ttl*60;
if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
ctx.cfg.nocache = 1;
if (ctx.cfg.nocache)
ctx.cfg.cache_size = 0;
err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
ctx.qry.raw, ttl, process_request, &ctx);
if (err)
cgit_print_error(fmt("Error processing page: %s (%d)",
strerror(err), err));
return err;
}
