cgitsb/cgit.c

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34 KiB
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/* cgit.c: cgi for the git scm
*
* 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"
#include "cache.h"
#include "cmd.h"
#include "configfile.h"
#include "html.h"
#include "ui-shared.h"
#include "ui-stats.h"
#include "ui-blob.h"
#include "ui-summary.h"
#include "scan-tree.h"
const char *cgit_version = CGIT_VERSION;
static void add_mimetype(const char *name, const char *value)
{
struct string_list_item *item;
item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
item->util = xstrdup(value);
}
static void process_cached_repolist(const char *path);
static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
{
const char *path;
struct string_list_item *item;
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, "homepage"))
repo->homepage = 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-commit-graph"))
repo->enable_commit_graph = atoi(value);
else if (!strcmp(name, "enable-log-filecount"))
repo->enable_log_filecount = atoi(value);
else if (!strcmp(name, "enable-log-linecount"))
repo->enable_log_linecount = atoi(value);
else if (!strcmp(name, "enable-remote-branches"))
repo->enable_remote_branches = atoi(value);
else if (!strcmp(name, "enable-subject-links"))
repo->enable_subject_links = atoi(value);
else if (!strcmp(name, "enable-html-serving"))
repo->enable_html_serving = atoi(value);
else if (!strcmp(name, "branch-sort")) {
if (!strcmp(value, "age"))
repo->branch_sort = 1;
if (!strcmp(value, "name"))
repo->branch_sort = 0;
} else if (!strcmp(name, "commit-sort")) {
if (!strcmp(value, "date"))
repo->commit_sort = 1;
if (!strcmp(value, "topo"))
repo->commit_sort = 2;
} 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 (skip_prefix(name, "module-link.", &path)) {
item = string_list_append(&repo->submodules, xstrdup(path));
item->util = xstrdup(value);
} else if (!strcmp(name, "section"))
repo->section = xstrdup(value);
else if (!strcmp(name, "readme") && value != NULL) {
if (repo->readme.items == ctx.cfg.readme.items)
memset(&repo->readme, 0, sizeof(repo->readme));
string_list_append(&repo->readme, xstrdup(value));
} else if (!strcmp(name, "logo") && value != NULL)
repo->logo = xstrdup(value);
else if (!strcmp(name, "logo-link") && value != NULL)
repo->logo_link = xstrdup(value);
else if (!strcmp(name, "hide"))
repo->hide = atoi(value);
else if (!strcmp(name, "ignore"))
repo->ignore = atoi(value);
else if (ctx.cfg.enable_filter_overrides) {
if (!strcmp(name, "about-filter"))
repo->about_filter = cgit_new_filter(value, ABOUT);
else if (!strcmp(name, "commit-filter"))
repo->commit_filter = cgit_new_filter(value, COMMIT);
else if (!strcmp(name, "source-filter"))
repo->source_filter = cgit_new_filter(value, SOURCE);
else if (!strcmp(name, "email-filter"))
repo->email_filter = cgit_new_filter(value, EMAIL);
else if (!strcmp(name, "owner-filter"))
repo->owner_filter = cgit_new_filter(value, OWNER);
}
}
static void config_cb(const char *name, const char *value)
{
const char *arg;
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 && skip_prefix(name, "repo.", &arg))
repo_config(ctx.repo, arg, value);
else if (!strcmp(name, "readme"))
string_list_append(&ctx.cfg.readme, xstrdup(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, "strict-export"))
ctx.cfg.strict_export = xstrdup(value);
else if (!strcmp(name, "virtual-root")) {
ctx.cfg.virtual_root = ensure_end(value, '/');
} 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);
log: allow users to follow a file Teach the "log" UI to behave in the same way as "git log --follow", when given a suitable instruction by the user. The default behaviour remains to show the log without following renames, but the follow behaviour can be activated by following a link in the page header. Follow is not the default because outputting merges in follow mode is tricky ("git log --follow" will not show merges). We also disable the graph in follow mode because the commit graph is not simplified so we end up with frequent gaps in the graph and many lines that do not connect with any commits we're actually showing. We also teach the "diff" and "commit" UIs to respect the follow flag on URLs, causing the single-file version of these UIs to detect renames. This feature is needed only for commits that rename the path we're interested in. For commits before the file has been renamed (i.e. that appear later in the log list) we change the file path in the links from the log to point to the old name; this means that links to commits always limit by the path known to that commit. If we didn't do this we would need to walk down the log diff'ing every commit whenever we want to show a commit. The drawback is that the "Log" link in the top bar of such a page links to the log limited by the old name, so it will only show pre-rename commits. I consider this a reasonable trade-off since the "Back" button still works and the log matches the path displayed in the top bar. Since following renames requires running diff on every commit we consider, I've added a knob to the configuration file to globally enable/disable this feature. Note that we may consider a large number of commits the revision walking machinery no longer performs any path limitation so we have to examine every commit until we find a page full of commits that affect the target path or something related to it. Suggested-by: René Neumann <necoro@necoro.eu> Signed-off-by: John Keeping <john@keeping.me.uk>
2015-08-12 16:55:28 +02:00
else if (!strcmp(name, "enable-follow-links"))
ctx.cfg.enable_follow_links = atoi(value);
else if (!strcmp(name, "enable-http-clone"))
ctx.cfg.enable_http_clone = atoi(value);
else if (!strcmp(name, "enable-index-links"))
ctx.cfg.enable_index_links = atoi(value);
else if (!strcmp(name, "enable-index-owner"))
ctx.cfg.enable_index_owner = atoi(value);
else if (!strcmp(name, "enable-commit-graph"))
ctx.cfg.enable_commit_graph = 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, "enable-remote-branches"))
ctx.cfg.enable_remote_branches = atoi(value);
else if (!strcmp(name, "enable-subject-links"))
ctx.cfg.enable_subject_links = atoi(value);
else if (!strcmp(name, "enable-html-serving"))
ctx.cfg.enable_html_serving = atoi(value);
else if (!strcmp(name, "enable-tree-linenumbers"))
ctx.cfg.enable_tree_linenumbers = atoi(value);
else if (!strcmp(name, "enable-git-config"))
ctx.cfg.enable_git_config = 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(expand_macros(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, "cache-about-ttl"))
ctx.cfg.cache_about_ttl = atoi(value);
else if (!strcmp(name, "cache-snapshot-ttl"))
ctx.cfg.cache_snapshot_ttl = atoi(value);
else if (!strcmp(name, "case-sensitive-sort"))
ctx.cfg.case_sensitive_sort = atoi(value);
else if (!strcmp(name, "about-filter"))
ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
else if (!strcmp(name, "commit-filter"))
ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
else if (!strcmp(name, "email-filter"))
ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
else if (!strcmp(name, "owner-filter"))
ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
else if (!strcmp(name, "auth-filter"))
ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
else if (!strcmp(name, "embedded"))
ctx.cfg.embedded = atoi(value);
else if (!strcmp(name, "max-atom-items"))
ctx.cfg.max_atom_items = 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-blob-size"))
ctx.cfg.max_blob_size = 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, "project-list"))
ctx.cfg.project_list = xstrdup(expand_macros(value));
else if (!strcmp(name, "scan-path"))
if (!ctx.cfg.nocache && ctx.cfg.cache_size)
process_cached_repolist(expand_macros(value));
else if (ctx.cfg.project_list)
scan_projects(expand_macros(value),
ctx.cfg.project_list, repo_config);
else
scan_tree(expand_macros(value), repo_config);
else if (!strcmp(name, "scan-hidden-path"))
ctx.cfg.scan_hidden_path = atoi(value);
else if (!strcmp(name, "section-from-path"))
ctx.cfg.section_from_path = atoi(value);
else if (!strcmp(name, "repository-sort"))
ctx.cfg.repository_sort = xstrdup(value);
else if (!strcmp(name, "section-sort"))
ctx.cfg.section_sort = atoi(value);
else if (!strcmp(name, "source-filter"))
ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
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, "side-by-side-diffs"))
ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
else if (!strcmp(name, "agefile"))
ctx.cfg.agefile = xstrdup(value);
else if (!strcmp(name, "mimetype-file"))
ctx.cfg.mimetype_file = xstrdup(value);
else if (!strcmp(name, "renamelimit"))
ctx.cfg.renamelimit = atoi(value);
else if (!strcmp(name, "remove-suffix"))
ctx.cfg.remove_suffix = atoi(value);
else if (!strcmp(name, "robots"))
ctx.cfg.robots = xstrdup(value);
else if (!strcmp(name, "clone-prefix"))
ctx.cfg.clone_prefix = xstrdup(value);
cgit.c: add 'clone-url' setting with support for macro expansion The current 'clone-prefix' setting has some known issues: * All repos get the same 'clone-prefix' value since the setting is not adopted during repo registration (in cgitrc, or during scan-path traversal), but only when the setting is used. * The generated clone-urls for a repo is a combination of 'clone-prefix', a slash and the repo url. This doesn't work well with e.g. ssh-style urls like 'git@example.org:repo.git', since the inserted slash will make the repo relative to the filesystem root. * If 'remove-suffix' is enabled, the generated clone-urls will not work for cloning (except for http-urls to cgit itself) since they miss the '.git' suffix. The new 'clone-url' setting is designed to avoid the mentioned issues: * Each repo adopts the default 'clone-url' when the repo is defined. This allows different groups of repos to adopt different values. * The clone-urls for a repo is generated by expanding environment variables in a string template without inserting arbitrary characters, hence any kind of clone-url can be generated. * Macro expansion also eases the 'remove-suffix' pain since it's now possible to define e.g. 'clone-url=git://foo.org/$CGIT_REPO_URL.git' for a set of repos. A furter improvement would be to define e.g. $CGIT_REPO_SUFFIX to '.git' for all repos which had their url prettified, or to store the original $CGIT_REPO_URL in e.g. $CGIT_REPO_REAL_URL before suffix removal. Reviewed-by: Ferry Huberts <mailings@hupie.com> Signed-off-by: Lars Hjemli <hjemli@gmail.com>
2011-06-06 22:49:13 +02:00
else if (!strcmp(name, "clone-url"))
ctx.cfg.clone_url = xstrdup(value);
else if (!strcmp(name, "local-time"))
ctx.cfg.local_time = atoi(value);
else if (!strcmp(name, "commit-sort")) {
if (!strcmp(value, "date"))
ctx.cfg.commit_sort = 1;
if (!strcmp(value, "topo"))
ctx.cfg.commit_sort = 2;
} else if (!strcmp(name, "branch-sort")) {
if (!strcmp(value, "age"))
ctx.cfg.branch_sort = 1;
if (!strcmp(value, "name"))
ctx.cfg.branch_sort = 0;
} else if (skip_prefix(name, "mimetype.", &arg))
add_mimetype(arg, value);
else if (!strcmp(name, "include"))
parse_configfile(expand_macros(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")) {
if (*value == '/')
value++;
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, "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);
} else if (!strcmp(name, "dt")) {
ctx.qry.difftype = atoi(value);
ctx.qry.has_difftype = 1;
} else if (!strcmp(name, "ss")) {
/* No longer generated, but there may be links out there. */
ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
ctx.qry.has_difftype = 1;
} else if (!strcmp(name, "all")) {
ctx.qry.show_all = atoi(value);
} else if (!strcmp(name, "context")) {
ctx.qry.context = atoi(value);
} else if (!strcmp(name, "ignorews")) {
ctx.qry.ignorews = atoi(value);
log: allow users to follow a file Teach the "log" UI to behave in the same way as "git log --follow", when given a suitable instruction by the user. The default behaviour remains to show the log without following renames, but the follow behaviour can be activated by following a link in the page header. Follow is not the default because outputting merges in follow mode is tricky ("git log --follow" will not show merges). We also disable the graph in follow mode because the commit graph is not simplified so we end up with frequent gaps in the graph and many lines that do not connect with any commits we're actually showing. We also teach the "diff" and "commit" UIs to respect the follow flag on URLs, causing the single-file version of these UIs to detect renames. This feature is needed only for commits that rename the path we're interested in. For commits before the file has been renamed (i.e. that appear later in the log list) we change the file path in the links from the log to point to the old name; this means that links to commits always limit by the path known to that commit. If we didn't do this we would need to walk down the log diff'ing every commit whenever we want to show a commit. The drawback is that the "Log" link in the top bar of such a page links to the log limited by the old name, so it will only show pre-rename commits. I consider this a reasonable trade-off since the "Back" button still works and the log matches the path displayed in the top bar. Since following renames requires running diff on every commit we consider, I've added a knob to the configuration file to globally enable/disable this feature. Note that we may consider a large number of commits the revision walking machinery no longer performs any path limitation so we have to examine every commit until we find a page full of commits that affect the target path or something related to it. Suggested-by: René Neumann <necoro@necoro.eu> Signed-off-by: John Keeping <john@keeping.me.uk>
2015-08-12 16:55:28 +02:00
} else if (!strcmp(name, "follow")) {
ctx.qry.follow = atoi(value);
}
}
static void prepare_context(void)
{
memset(&ctx, 0, sizeof(ctx));
ctx.cfg.agefile = "info/web/last-modified";
ctx.cfg.nocache = 0;
ctx.cfg.cache_size = 0;
ctx.cfg.cache_max_create_time = 5;
ctx.cfg.cache_root = CGIT_CACHE_ROOT;
ctx.cfg.cache_about_ttl = 15;
ctx.cfg.cache_snapshot_ttl = 5;
ctx.cfg.cache_repo_ttl = 5;
ctx.cfg.cache_root_ttl = 5;
ctx.cfg.cache_scanrc_ttl = 15;
ctx.cfg.cache_dynamic_ttl = 5;
ctx.cfg.cache_static_ttl = -1;
ctx.cfg.case_sensitive_sort = 1;
ctx.cfg.branch_sort = 0;
ctx.cfg.commit_sort = 0;
ctx.cfg.css = "/cgit.css";
ctx.cfg.logo = "/cgit.png";
ctx.cfg.favicon = "/favicon.ico";
ctx.cfg.local_time = 0;
ctx.cfg.enable_http_clone = 1;
ctx.cfg.enable_index_owner = 1;
ctx.cfg.enable_tree_linenumbers = 1;
ctx.cfg.enable_git_config = 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_blob_size = 0;
ctx.cfg.max_stats = 0;
ctx.cfg.project_list = NULL;
ctx.cfg.renamelimit = -1;
ctx.cfg.remove_suffix = 0;
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.scan_hidden_path = 0;
ctx.cfg.script_name = CGIT_SCRIPT_NAME;
ctx.cfg.section = "";
ctx.cfg.repository_sort = "name";
ctx.cfg.section_sort = 1;
ctx.cfg.summary_branches = 10;
ctx.cfg.summary_log = 10;
ctx.cfg.summary_tags = 10;
ctx.cfg.max_atom_items = 10;
ctx.cfg.difftype = DIFF_UNIFIED;
ctx.env.cgit_config = getenv("CGIT_CONFIG");
ctx.env.http_host = getenv("HTTP_HOST");
ctx.env.https = getenv("HTTPS");
ctx.env.no_http = getenv("NO_HTTP");
ctx.env.path_info = getenv("PATH_INFO");
ctx.env.query_string = getenv("QUERY_STRING");
ctx.env.request_method = getenv("REQUEST_METHOD");
ctx.env.script_name = getenv("SCRIPT_NAME");
ctx.env.server_name = getenv("SERVER_NAME");
ctx.env.server_port = getenv("SERVER_PORT");
ctx.env.http_cookie = getenv("HTTP_COOKIE");
ctx.env.http_referer = getenv("HTTP_REFERER");
ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
ctx.env.authenticated = 0;
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 = xstrdup(ctx.env.script_name);
if (ctx.env.query_string)
ctx.qry.raw = xstrdup(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;
};
static int find_current_ref(const char *refname, const struct object_id *oid,
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;
}
static void free_refmatch_inner(struct refmatch *info)
{
if (info->first_ref)
free(info->first_ref);
}
static 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);
free_refmatch_inner(&info);
return ref;
}
static char *guess_defbranch(void)
{
const char *ref, *refname;
struct object_id oid;
ref = resolve_ref_unsafe("HEAD", 0, oid.hash, NULL);
if (!ref || !skip_prefix(ref, "refs/heads/", &refname))
return "master";
return xstrdup(refname);
}
/* The caller must free filename and ref after calling this. */
static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
{
const char *colon;
*filename = NULL;
*ref = NULL;
if (!readme || !readme[0])
return;
/* Check if the readme is tracked in the git repo. */
colon = strchr(readme, ':');
if (colon && strlen(colon) > 1) {
/* If it starts with a colon, we want to use
* the default branch */
if (colon == readme && repo->defbranch)
*ref = xstrdup(repo->defbranch);
else
*ref = xstrndup(readme, colon - readme);
readme = colon + 1;
}
/* Prepend repo path to relative readme path unless tracked. */
if (!(*ref) && readme[0] != '/')
*filename = fmtalloc("%s/%s", repo->path, readme);
else
*filename = xstrdup(readme);
}
static void choose_readme(struct cgit_repo *repo)
{
int found;
char *filename, *ref;
struct string_list_item *entry;
if (!repo->readme.nr)
return;
found = 0;
for_each_string_list_item(entry, &repo->readme) {
parse_readme(entry->string, &filename, &ref, repo);
if (!filename) {
free(filename);
free(ref);
continue;
}
if (ref) {
if (cgit_ref_path_exists(filename, ref, 1)) {
found = 1;
break;
}
}
else if (!access(filename, R_OK)) {
found = 1;
break;
}
free(filename);
free(ref);
}
repo->readme.strdup_strings = 1;
string_list_clear(&repo->readme, 0);
repo->readme.strdup_strings = 0;
if (found)
string_list_append(&repo->readme, filename)->util = ref;
}
2015-03-05 02:18:42 +01:00
static void print_no_repo_clone_urls(const char *url)
{
html("<tr><td><a rel='vcs-git' href='");
html_url_path(url);
html("' title='");
html_attr(ctx.repo->name);
html(" Git repository'>");
html_txt(url);
html("</a></td></tr>\n");
}
static int prepare_repo_cmd(void)
{
struct object_id oid;
int nongit = 0;
int rc;
/* The path to the git repository. */
setenv("GIT_DIR", ctx.repo->path, 1);
/* Do not look in /etc/ for gitconfig and gitattributes. */
setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
setenv("GIT_ATTR_NOSYSTEM", "1", 1);
unsetenv("HOME");
unsetenv("XDG_CONFIG_HOME");
/* Setup the git directory and initialize the notes system. Both of these
* load local configuration from the git repository, so we do them both while
* the HOME variables are unset. */
setup_git_directory_gently(&nongit);
init_display_notes(NULL);
if (nongit) {
const char *name = ctx.repo->name;
rc = errno;
ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
"config error");
ctx.repo = NULL;
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
cgit_print_error("Failed to open %s: %s", name,
rc ? strerror(rc) : "Not a valid git repository");
cgit_print_docend();
return 1;
}
ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
if (!ctx.repo->defbranch)
ctx.repo->defbranch = guess_defbranch();
if (!ctx.qry.head) {
ctx.qry.nohead = 1;
ctx.qry.head = find_default_branch(ctx.repo);
}
if (!ctx.qry.head) {
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
cgit_print_error("Repository seems to be empty");
2015-03-05 02:18:42 +01:00
if (!strcmp(ctx.qry.page, "summary")) {
html("<table class='list'><tr class='nohover'><td>&nbsp;</td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
cgit_prepare_repo_env(ctx.repo);
2015-03-05 02:18:42 +01:00
cgit_add_clone_urls(print_no_repo_clone_urls);
html("</table>\n");
}
cgit_print_docend();
return 1;
}
if (get_oid(ctx.qry.head, &oid)) {
char *old_head = ctx.qry.head;
ctx.qry.head = xstrdup(ctx.repo->defbranch);
cgit_print_error_page(404, "Not found",
"Invalid branch: %s", old_head);
free(old_head);
return 1;
}
string_list_sort(&ctx.repo->submodules);
cgit_prepare_repo_env(ctx.repo);
choose_readme(ctx.repo);
return 0;
}
static inline void open_auth_filter(const char *function)
{
cgit_open_filter(ctx.cfg.auth_filter, function,
ctx.env.http_cookie ? ctx.env.http_cookie : "",
ctx.env.request_method ? ctx.env.request_method : "",
ctx.env.query_string ? ctx.env.query_string : "",
ctx.env.http_referer ? ctx.env.http_referer : "",
ctx.env.path_info ? ctx.env.path_info : "",
ctx.env.http_host ? ctx.env.http_host : "",
ctx.env.https ? ctx.env.https : "",
ctx.qry.repo ? ctx.qry.repo : "",
ctx.qry.page ? ctx.qry.page : "",
ctx.qry.url ? ctx.qry.url : "",
cgit_loginurl());
}
/* We intentionally keep this rather small, instead of looping and
* feeding it to the filter a couple bytes at a time. This way, the
* filter itself does not need to handle any denial of service or
* buffer bloat issues. If this winds up being too small, people
* will complain on the mailing list, and we'll increase it as needed. */
#define MAX_AUTHENTICATION_POST_BYTES 4096
/* The filter is expected to spit out "Status: " and all headers. */
static inline void authenticate_post(void)
{
char buffer[MAX_AUTHENTICATION_POST_BYTES];
unsigned int len;
open_auth_filter("authenticate-post");
len = ctx.env.content_length;
if (len > MAX_AUTHENTICATION_POST_BYTES)
len = MAX_AUTHENTICATION_POST_BYTES;
if (read(STDIN_FILENO, buffer, len) < 0)
die_errno("Could not read POST from stdin");
if (write(STDOUT_FILENO, buffer, len) < 0)
die_errno("Could not write POST to stdout");
cgit_close_filter(ctx.cfg.auth_filter);
exit(0);
}
static inline void authenticate_cookie(void)
{
/* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
if (!ctx.cfg.auth_filter) {
ctx.env.authenticated = 1;
return;
}
/* If we're having something POST'd to /login, we're authenticating POST,
* instead of the cookie, so call authenticate_post and bail out early.
* This pattern here should match /?p=login with POST. */
if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
!strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
authenticate_post();
return;
}
/* If we've made it this far, we're authenticating the cookie for real, so do that. */
open_auth_filter("authenticate-cookie");
ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
}
static void process_request(void)
{
struct cgit_cmd *cmd;
/* If we're not yet authenticated, no matter what page we're on,
* display the authentication body from the auth_filter. This should
* never be cached. */
if (!ctx.env.authenticated) {
ctx.page.title = "Authentication Required";
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
open_auth_filter("body");
cgit_close_filter(ctx.cfg.auth_filter);
cgit_print_docend();
return;
}
cmd = cgit_get_cmd();
if (!cmd) {
ctx.page.title = "cgit error";
cgit_print_error_page(404, "Not found", "Invalid request");
return;
}
if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
ctx.page.title = "cgit error";
cgit_print_error_page(404, "Not found", "Invalid request");
return;
}
if (cmd->want_repo && !ctx.repo) {
cgit_print_error_page(400, "Bad request",
"No repository selected");
return;
}
/* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
* in-project path limit to be made available at ctx.qry.vpath.
* Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
*/
ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
if (ctx.repo && prepare_repo_cmd())
return;
cmd->fn();
}
static int cmp_repos(const void *a, const void *b)
{
const struct cgit_repo *ra = a, *rb = b;
return strcmp(ra->url, rb->url);
}
static char *build_snapshot_setting(int bitmap)
{
const struct cgit_snapshot_format *f;
struct strbuf result = STRBUF_INIT;
for (f = cgit_snapshot_formats; f->suffix; f++) {
if (f->bit & bitmap) {
if (result.len)
strbuf_addch(&result, ' ');
strbuf_addstr(&result, f->suffix);
}
}
return strbuf_detach(&result, NULL);
}
static char *get_first_line(char *txt)
{
char *t = xstrdup(txt);
char *p = strchr(t, '\n');
if (p)
*p = '\0';
return t;
}
static void print_repo(FILE *f, struct cgit_repo *repo)
{
struct string_list_item *item;
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) {
char *tmp = get_first_line(repo->desc);
fprintf(f, "repo.desc=%s\n", tmp);
free(tmp);
}
for_each_string_list_item(item, &repo->readme) {
if (item->util)
fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
else
fprintf(f, "repo.readme=%s\n", item->string);
}
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->homepage)
fprintf(f, "repo.homepage=%s\n", repo->homepage);
if (repo->clone_url)
fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
fprintf(f, "repo.enable-commit-graph=%d\n",
repo->enable_commit_graph);
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)
cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
if (repo->snapshots != ctx.cfg.snapshots) {
char *tmp = build_snapshot_setting(repo->snapshots);
fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
free(tmp);
}
if (repo->max_stats != ctx.cfg.max_stats)
fprintf(f, "repo.max-stats=%s\n",
cgit_find_stats_periodname(repo->max_stats));
if (repo->logo)
fprintf(f, "repo.logo=%s\n", repo->logo);
if (repo->logo_link)
fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
fprintf(f, "repo.enable-html-serving=%d\n", repo->enable_html_serving);
if (repo->branch_sort == 1)
fprintf(f, "repo.branch-sort=age\n");
if (repo->commit_sort) {
if (repo->commit_sort == 1)
fprintf(f, "repo.commit-sort=date\n");
else if (repo->commit_sort == 2)
fprintf(f, "repo.commit-sort=topo\n");
}
fprintf(f, "repo.hide=%d\n", repo->hide);
fprintf(f, "repo.ignore=%d\n", repo->ignore);
fprintf(f, "\n");
}
static 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)
{
struct strbuf locked_rc = STRBUF_INIT;
int result = 0;
int idx;
FILE *f;
strbuf_addf(&locked_rc, "%s.lock", cached_rc);
f = fopen(locked_rc.buf, "wx");
if (!f) {
/* Inform about the error unless the lockfile already existed,
* since that only means we've got concurrent requests.
*/
result = errno;
if (result != EEXIST)
fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
locked_rc.buf, strerror(result), result);
goto out;
}
idx = cgit_repolist.count;
if (ctx.cfg.project_list)
scan_projects(path, ctx.cfg.project_list, repo_config);
else
scan_tree(path, repo_config);
print_repolist(f, &cgit_repolist, idx);
if (rename(locked_rc.buf, cached_rc))
fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
locked_rc.buf, cached_rc, strerror(errno), errno);
fclose(f);
out:
strbuf_release(&locked_rc);
return result;
}
static void process_cached_repolist(const char *path)
{
struct stat st;
struct strbuf cached_rc = STRBUF_INIT;
time_t age;
unsigned long hash;
hash = hash_str(path);
if (ctx.cfg.project_list)
hash += hash_str(ctx.cfg.project_list);
strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
if (stat(cached_rc.buf, &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.buf)) {
if (ctx.cfg.project_list)
scan_projects(path, ctx.cfg.project_list,
repo_config);
else
scan_tree(path, repo_config);
}
goto out;
}
parse_configfile(cached_rc.buf, 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))
goto out;
/* 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())
goto out;
exit(generate_cached_repolist(path, cached_rc.buf));
out:
strbuf_release(&cached_rc);
}
static void cgit_parse_args(int argc, const char **argv)
{
int i;
const char *arg;
int scan = 0;
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "--version")) {
2016-02-24 18:01:42 +01:00
printf("CGit %s | https://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
#ifdef NO_LUA
printf("[-] ");
#else
printf("[+] ");
#endif
printf("Lua scripting\n");
#ifndef HAVE_LINUX_SENDFILE
printf("[-] ");
#else
printf("[+] ");
#endif
printf("Linux sendfile() usage\n");
exit(0);
}
if (skip_prefix(argv[i], "--cache=", &arg)) {
ctx.cfg.cache_root = xstrdup(arg);
} else if (!strcmp(argv[i], "--nocache")) {
ctx.cfg.nocache = 1;
} else if (!strcmp(argv[i], "--nohttp")) {
ctx.env.no_http = "1";
} else if (skip_prefix(argv[i], "--query=", &arg)) {
ctx.qry.raw = xstrdup(arg);
} else if (skip_prefix(argv[i], "--repo=", &arg)) {
ctx.qry.repo = xstrdup(arg);
} else if (skip_prefix(argv[i], "--page=", &arg)) {
ctx.qry.page = xstrdup(arg);
} else if (skip_prefix(argv[i], "--head=", &arg)) {
ctx.qry.head = xstrdup(arg);
ctx.qry.has_symref = 1;
} else if (skip_prefix(argv[i], "--sha1=", &arg)) {
ctx.qry.sha1 = xstrdup(arg);
ctx.qry.has_sha1 = 1;
} else if (skip_prefix(argv[i], "--ofs=", &arg)) {
ctx.qry.ofs = atoi(arg);
} else if (skip_prefix(argv[i], "--scan-tree=", &arg) ||
skip_prefix(argv[i], "--scan-path=", &arg)) {
/*
* HACK: The global snapshot bit mask defines the set
* of allowed snapshot formats, but the config file
* hasn't been parsed yet so the mask is currently 0.
* By setting all bits high before scanning we make
* sure that any in-repo cgitrc snapshot setting is
* respected by scan_tree().
*
* NOTE: We assume that there aren't more than 8
* different snapshot formats supported by cgit...
*/
ctx.cfg.snapshots = 0xFF;
scan++;
scan_tree(arg, 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(void)
{
if (!ctx.repo)
return ctx.cfg.cache_root_ttl;
if (!ctx.qry.page)
return ctx.cfg.cache_repo_ttl;
if (!strcmp(ctx.qry.page, "about"))
return ctx.cfg.cache_about_ttl;
if (!strcmp(ctx.qry.page, "snapshot"))
return ctx.cfg.cache_snapshot_ttl;
if (ctx.qry.has_sha1)
return ctx.cfg.cache_static_ttl;
if (ctx.qry.has_symref)
return ctx.cfg.cache_dynamic_ttl;
return ctx.cfg.cache_repo_ttl;
}
int cmd_main(int argc, const char **argv)
{
const char *path;
int err, ttl;
cgit_init_filters();
atexit(cgit_cleanup_filters);
prepare_context();
cgit_repolist.length = 0;
cgit_repolist.count = 0;
cgit_repolist.repos = NULL;
cgit_parse_args(argc, argv);
parse_configfile(expand_macros(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, minus any possibly
* trailing slashes.
*/
if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
ctx.cfg.virtual_root = ensure_end(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) {
char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
free(ctx.qry.raw);
ctx.qry.raw = newqry;
} else
ctx.qry.raw = xstrdup(ctx.qry.url);
cgit_parse_url(ctx.qry.url);
}
/* Before we go any further, we set ctx.env.authenticated by checking to see
* if the supplied cookie is valid. All cookies are valid if there is no
* auth_filter. If there is an auth_filter, the filter decides. */
authenticate_cookie();
ttl = calc_ttl();
if (ttl < 0)
ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
else
ctx.page.expires += ttl * 60;
if (!ctx.env.authenticated || (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);
cgit_cleanup_filters();
if (err)
cgit_print_error("Error processing page: %s (%d)",
strerror(err), err);
return err;
}