1 files changed, 117 insertions, 0 deletions
diff --git a/src/repo/s6rc_repo_cleanup.c b/src/repo/s6rc_repo_cleanup.c
new file mode 100644
index 0000000..05881cd
--- /dev/null
+++ b/src/repo/s6rc_repo_cleanup.c
@@ -0,0 +1,117 @@
+/* ISC license. */
+
+#include <skalibs/bsdsnowflake.h>
+
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <skalibs/stat.h>
+#include <skalibs/direntry.h>
+#include <skalibs/posixplz.h>
+#include <skalibs/strerr.h>
+#include <skalibs/djbunix.h>
+
+#include <s6-rc/repo.h>
+
+static inline int sub_cleanup (char const *sub)
+{
+  size_t sublen = strlen(sub) ;
+  DIR *dir = opendir(sub) ;
+  if (!dir) return 0 ;
+  for (;;)
+  {
+    size_t len ;
+    direntry *d ;
+    errno = 0 ;
+    d = readdir(dir) ;
+    if (!d) break ;
+    if (d->d_name[0] == '.') continue ;
+    len = strlen(d->d_name) ;
+    {
+      char fn[sublen + len + 2] ;
+      memcpy(fn, sub, sublen) ;
+      fn[sublen] = '/' ;
+      memcpy(fn + sublen + 1, d->d_name, len + 1) ;
+      if (access(fn, F_OK) == 0)
+      {
+        struct stat st ;
+        if (lstat(fn, &st) == -1) break ;
+        if (!S_ISLNK(st.st_mode)) rm_rf(fn) ;
+      }
+      else if (errno != ENOENT)
+      {
+        strerr_warnfu2sys("access ", fn) ;
+        break ;
+      }
+      else unlink_void(fn) ;
+    }
+  }
+  dir_close(dir) ;
+  return !errno ;
+}
+
+static inline int set_cleanup (char const *set)
+{
+  size_t setlen = strlen(set) ;
+  DIR *dir ;
+  {
+    char bundle[setlen + 8] ;
+    memcpy(bundle, set, setlen) ;
+    memcpy(bundle + setlen, "/bundle", 8) ;
+    rm_rf(bundle) ;
+  }
+  dir = opendir(set) ;
+  if (!dir) return 0 ;
+  for (;;)
+  {
+    size_t len ;
+    direntry *d ;
+    errno = 0 ;
+    d = readdir(dir) ;
+    if (!d) break ;
+    if (d->d_name[0] == '.') continue ;
+    len = strlen(d->d_name) ;
+    {
+      char fn[setlen + len + 2] ;
+      memcpy(fn, set, setlen) ;
+      fn[setlen] = '/' ;
+      memcpy(fn + setlen + 1, d->d_name, len + 1) ;
+      if (!sub_cleanup(fn)) break ;
+    }
+  }
+  dir_close(dir) ;
+  return !errno ;
+}
+
+int s6rc_repo_sources_cleanup (char const *repo)
+{
+  DIR *dir ;
+  size_t repolen = strlen(repo) ;
+  unsigned int nsets = 0 ;
+  char sets[repolen + 9] ;
+  memcpy(sets, repo, repolen) ;
+  memcpy(sets + repolen, "/sources", 9) ;
+  dir = opendir(sets) ;
+  if (!dir) return 0 ;
+  for (;;)
+  {
+    size_t len ;
+    direntry *d ;
+    errno = 0 ;
+    d = readdir(dir) ;
+    if (!d) break ;
+    if (d->d_name[0] == '.') continue ;
+    len = strlen(d->d_name) ;
+    {
+      char fn[repolen + len + 10] ;
+      memcpy(fn, sets, repolen + 8) ;
+      fn[repolen + 8] = '/' ;
+      memcpy(fn + repolen + 9, d->d_name, len + 1) ;
+      if (!set_cleanup(fn)) break ;
+      nsets++ ;
+    }
+  }
+  dir_close(dir) ;
+  return errno ? -1 : nsets ;
+}