Move cache_prepare() to cgit

This moves some cgit-specific stuff away from cache.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

3 files changed, 23 insertions, 25 deletions

diff --git a/cache.c b/cache.c
index 91b89a6..1ff1251 100644
--- a/cache.c
+++ b/cache.c
@@ -1,98 +1,76 @@
 /* cache.c: cache management
  *
  * Copyright (C) 2006 Lars Hjemli
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  */
 
 #include "cgit.h"
 
 const int NOLOCK = -1;
 
-void cache_prepare(struct cacheitem *item)
-{
-        if (!cgit_query_repo) {
-                item->name = xstrdup(fmt("%s/index.html", cgit_cache_root));
-                item->ttl = cgit_cache_root_ttl;
-        } else if (!cgit_query_page) {
-                item->name = xstrdup(fmt("%s/%s/index.html", cgit_cache_root, 
-                           cgit_query_repo));
-                item->ttl = cgit_cache_repo_ttl;
-        } else {
-                item->name = xstrdup(fmt("%s/%s/%s/%s.html", cgit_cache_root, 
-                           cgit_query_repo, cgit_query_page, 
-                           cgit_querystring));
-                if (cgit_query_has_symref)
-                        item->ttl = cgit_cache_dynamic_ttl;
-                else if (cgit_query_has_sha1)
-                        item->ttl = cgit_cache_static_ttl;
-                else
-                        item->ttl = cgit_cache_repo_ttl;
-        }
-}
-
 int cache_exist(struct cacheitem *item)
 {
         if (stat(item->name, &item->st)) {
                 item->st.st_mtime = 0;
                 return 0;
         }
         return 1;
 }
 
 int cache_create_dirs()
 {
         char *path;
 
         path = fmt("%s", cgit_cache_root);
         if (mkdir(path, S_IRWXU) && errno!=EEXIST)
                 return 0;
 
         if (!cgit_query_repo)
                 return 0;
 
         path = fmt("%s/%s", cgit_cache_root, cgit_query_repo);
         if (mkdir(path, S_IRWXU) && errno!=EEXIST)
                 return 0;
 
         if (cgit_query_page) {
                 path = fmt("%s/%s/%s", cgit_cache_root, cgit_query_repo, 
                            cgit_query_page);
                 if (mkdir(path, S_IRWXU) && errno!=EEXIST)
                         return 0;
         }
         return 1;
 }
 
 int cache_refill_overdue(const char *lockfile)
 {
         struct stat st;
 
         if (stat(lockfile, &st))
                 return 0;
         else
                 return (time(NULL) - st.st_mtime > cgit_cache_max_create_time);
 }
 
 int cache_lock(struct cacheitem *item)
 {
         int i = 0;
         char *lockfile = xstrdup(fmt("%s.lock", item->name));
 
  top:
         if (++i > cgit_max_lock_attempts)
                 die("cache_lock: unable to lock %s: %s",
                     item->name, strerror(errno));
 
                item->fd = open(lockfile, O_WRONLY|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR);
 
         if (item->fd == NOLOCK && errno == ENOENT && cache_create_dirs())
                 goto top;
 
         if (item->fd == NOLOCK && errno == EEXIST &&
             cache_refill_overdue(lockfile) && !unlink(lockfile))
                         goto top;
 
         free(lockfile);
         return (item->fd > 0);
diff --git a/cgit.c b/cgit.c
index 5dcba76..d975570 100644
--- a/cgit.c
+++ b/cgit.c
@@ -1,164 +1,185 @@
 /* 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"
 
 const char cgit_version[] = CGIT_VERSION;
 
+static void cgit_prepare_cache(struct cacheitem *item)
+{
+        if (!cgit_query_repo) {
+                item->name = xstrdup(fmt("%s/index.html", cgit_cache_root));
+                item->ttl = cgit_cache_root_ttl;
+        } else if (!cgit_query_page) {
+                item->name = xstrdup(fmt("%s/%s/index.html", cgit_cache_root, 
+                           cgit_query_repo));
+                item->ttl = cgit_cache_repo_ttl;
+        } else {
+                item->name = xstrdup(fmt("%s/%s/%s/%s.html", cgit_cache_root, 
+                           cgit_query_repo, cgit_query_page, 
+                           cgit_querystring));
+                if (cgit_query_has_symref)
+                        item->ttl = cgit_cache_dynamic_ttl;
+                else if (cgit_query_has_sha1)
+                        item->ttl = cgit_cache_static_ttl;
+                else
+                        item->ttl = cgit_cache_repo_ttl;
+        }
+}
+
 static void cgit_print_repo_page(struct cacheitem *item)
 {
         if (chdir(fmt("%s/%s", cgit_root, cgit_query_repo)) || 
             cgit_read_config("info/cgit", cgit_repo_config_cb)) {
                 char *title = fmt("%s - %s", cgit_root_title, "Bad request");
                 cgit_print_docstart(title, item);
                 cgit_print_pageheader(title, 0);
                 cgit_print_error(fmt("Unable to scan repository: %s",
                                      strerror(errno)));
                 cgit_print_docend();
                 return;
         }
         setenv("GIT_DIR", fmt("%s/%s", cgit_root, cgit_query_repo), 1);
         char *title = fmt("%s - %s", cgit_repo_name, cgit_repo_desc);
         int show_search = 0;
         if (cgit_query_page && !strcmp(cgit_query_page, "log"))
                 show_search = 1;
         cgit_print_docstart(title, item);
         cgit_print_pageheader(title, show_search);
         if (!cgit_query_page) {
                 cgit_print_summary();
         } else if (!strcmp(cgit_query_page, "log")) {
                 cgit_print_log(cgit_query_head, cgit_query_ofs, 100, cgit_query_search);
         } else if (!strcmp(cgit_query_page, "tree")) {
                 cgit_print_tree(cgit_query_sha1);
         } else if (!strcmp(cgit_query_page, "commit")) {
                 cgit_print_commit(cgit_query_sha1);
         } else if (!strcmp(cgit_query_page, "view")) {
                 cgit_print_view(cgit_query_sha1);
         } else if (!strcmp(cgit_query_page, "diff")) {
                 cgit_print_diff(cgit_query_sha1, cgit_query_sha2);
         }
         cgit_print_docend();
 }
 
 static void cgit_fill_cache(struct cacheitem *item)
 {
         static char buf[PATH_MAX];
 
         getcwd(buf, sizeof(buf));
         htmlfd = item->fd;
         item->st.st_mtime = time(NULL);
         if (cgit_query_repo)
                 cgit_print_repo_page(item);
         else
                 cgit_print_repolist(item);
         chdir(buf);
 }
 
 static void cgit_check_cache(struct cacheitem *item)
 {
         int i = 0;
 
-        cache_prepare(item);
  top:
         if (++i > cgit_max_lock_attempts) {
                 die("cgit_refresh_cache: unable to lock %s: %s",
                     item->name, strerror(errno));
         }
         if (!cache_exist(item)) {
                 if (!cache_lock(item)) {
                         sleep(1);
                         goto top;
                 }
                 if (!cache_exist(item)) {
                         cgit_fill_cache(item);
                         cache_unlock(item);
                 } else {
                         cache_cancel_lock(item);
                 }
         } else if (cache_expired(item) && cache_lock(item)) {
                 if (cache_expired(item)) {
                         cgit_fill_cache(item);
                         cache_unlock(item);
                 } else {
                         cache_cancel_lock(item);
                 }
         }
 }
 
 static void cgit_print_cache(struct cacheitem *item)
 {
         static char buf[4096];
         ssize_t i;
 
         int fd = open(item->name, O_RDONLY);
         if (fd<0)
                 die("Unable to open cached file %s", item->name);
 
         while((i=read(fd, buf, sizeof(buf))) > 0)
                 write(STDOUT_FILENO, buf, i);
 
         close(fd);
 }
 
 static void cgit_parse_args(int argc, const char **argv)
 {
         int i;
 
         for (i = 1; i < argc; i++) {
                 if (!strncmp(argv[i], "--root=", 7)) {
                         cgit_root = xstrdup(argv[i]+7);
                 }
                 if (!strncmp(argv[i], "--cache=", 8)) {
                         cgit_cache_root = xstrdup(argv[i]+8);
                 }
                 if (!strcmp(argv[i], "--nocache")) {
                         cgit_nocache = 1;
                 }
                 if (!strncmp(argv[i], "--query=", 8)) {
                         cgit_querystring = xstrdup(argv[i]+8);
                 }
                 if (!strncmp(argv[i], "--repo=", 7)) {
                         cgit_query_repo = xstrdup(argv[i]+7);
                 }
                 if (!strncmp(argv[i], "--page=", 7)) {
                         cgit_query_page = xstrdup(argv[i]+7);
                 }
                 if (!strncmp(argv[i], "--head=", 7)) {
                         cgit_query_head = xstrdup(argv[i]+7);
                         cgit_query_has_symref = 1;
                 }
                 if (!strncmp(argv[i], "--sha1=", 7)) {
                         cgit_query_sha1 = xstrdup(argv[i]+7);
                         cgit_query_has_sha1 = 1;
                 }
                 if (!strncmp(argv[i], "--ofs=", 6)) {
                         cgit_query_ofs = atoi(argv[i]+6);
                 }
         }
 }
 
 int main(int argc, const char **argv)
 {
         struct cacheitem item;
 
         cgit_read_config("/etc/cgitrc", cgit_global_config_cb);
         if (getenv("QUERY_STRING"))
                 cgit_querystring = xstrdup(getenv("QUERY_STRING"));
         cgit_parse_args(argc, argv);
         cgit_parse_query(cgit_querystring, cgit_querystring_cb);
 
+        cgit_prepare_cache(&item);
         if (cgit_nocache) {
-                cache_prepare(&item);
                 item.fd = STDOUT_FILENO;
                 cgit_fill_cache(&item);
         } else {
                 cgit_check_cache(&item);
                 cgit_print_cache(&item);
         }
         return 0;
 }
diff --git a/cgit.h b/cgit.h
index eb8f08c..f915c86 100644
--- a/cgit.h
+++ b/cgit.h
@@ -26,90 +26,89 @@ struct commitinfo {
         char *subject;
         char *msg;
 };
 
 extern const char cgit_version[];
 
 extern char *cgit_root;
 extern char *cgit_root_title;
 extern char *cgit_css;
 extern char *cgit_logo;
 extern char *cgit_logo_link;
 extern char *cgit_virtual_root;
 extern char *cgit_cache_root;
 
 extern int cgit_nocache;
 extern int cgit_max_lock_attempts;
 extern int cgit_cache_root_ttl;
 extern int cgit_cache_repo_ttl;
 extern int cgit_cache_dynamic_ttl;
 extern int cgit_cache_static_ttl;
 extern int cgit_cache_max_create_time;
 
 extern char *cgit_repo_name;
 extern char *cgit_repo_desc;
 extern char *cgit_repo_owner;
 
 extern int cgit_query_has_symref;
 extern int cgit_query_has_sha1;
 
 extern char *cgit_querystring;
 extern char *cgit_query_repo;
 extern char *cgit_query_page;
 extern char *cgit_query_search;
 extern char *cgit_query_head;
 extern char *cgit_query_sha1;
 extern char *cgit_query_sha2;
 extern int   cgit_query_ofs;
 
 extern int htmlfd;
 
 extern void cgit_global_config_cb(const char *name, const char *value);
 extern void cgit_repo_config_cb(const char *name, const char *value);
 extern void cgit_querystring_cb(const char *name, const char *value);
 
 extern int hextoint(char c);
 
 extern void *cgit_free_commitinfo(struct commitinfo *info);
 
 extern char *fmt(const char *format,...);
 
 extern void html(const char *txt);
 extern void htmlf(const char *format,...);
 extern void html_txt(char *txt);
 extern void html_ntxt(int len, char *txt);
 extern void html_attr(char *txt);
 extern void html_hidden(char *name, char *value);
 extern void html_link_open(char *url, char *title, char *class);
 extern void html_link_close(void);
 extern void html_filemode(unsigned short mode);
 
 extern int cgit_read_config(const char *filename, configfn fn);
 extern int cgit_parse_query(char *txt, configfn fn);
 extern struct commitinfo *cgit_parse_commit(struct commit *commit);
 
-extern void cache_prepare(struct cacheitem *item);
 extern int cache_lock(struct cacheitem *item);
 extern int cache_unlock(struct cacheitem *item);
 extern int cache_cancel_lock(struct cacheitem *item);
 extern int cache_exist(struct cacheitem *item);
 extern int cache_expired(struct cacheitem *item);
 
 extern char *cgit_repourl(const char *reponame);
 extern char *cgit_pageurl(const char *reponame, const char *pagename, 
                           const char *query);
 
 extern void cgit_print_error(char *msg);
 extern void cgit_print_date(unsigned long secs);
 extern void cgit_print_docstart(char *title, struct cacheitem *item);
 extern void cgit_print_docend();
 extern void cgit_print_pageheader(char *title, int show_search);
 
 extern void cgit_print_repolist(struct cacheitem *item);
 extern void cgit_print_summary();
 extern void cgit_print_log(const char *tip, int ofs, int cnt, char *grep);
 extern void cgit_print_view(const char *hex);
 extern void cgit_print_tree(const char *hex);
 extern void cgit_print_commit(const char *hex);
 extern void cgit_print_diff(const char *old_hex, const char *new_hex);
 
 #endif /* CGIT_H */