* apt-pkg/contrib/fileutl.{cc,h}:

  - add GetModificationTime() helper
* apt-pkg/pkgcachegen.cc:
  - regenerate the cache if the sources.list changes to ensure
    that changes in the ordering there will be honored by apt
* apt-pkg/sourcelist.{cc,h}:
  - add pkgSourceList::GetLastModifiedTime() helper

2 files changed, 12 insertions, 0 deletions

diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index 50019872e..85dc6f600 100644
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -446,6 +446,17 @@ string SafeGetCWD()
    return S;
 }
 									/*}}}*/
+// GetModificationTime - Get the mtime of the given file or -1 on error /*{{{*/
+// ---------------------------------------------------------------------
+/* We return / on failure. */
+time_t GetModificationTime(string const &Path)
+{
+   struct stat St;
+   if (stat(Path.c_str(), &St) < 0)
+      return -1;
+   return  St.st_mtime;
+}
+									/*}}}*/
 // flNotDir - Strip the directory from the filename			/*{{{*/
 // ---------------------------------------------------------------------
 /* */
diff --git a/apt-pkg/contrib/fileutl.h b/apt-pkg/contrib/fileutl.h
index cde288ad2..a1b177f38 100644
--- a/apt-pkg/contrib/fileutl.h
+++ b/apt-pkg/contrib/fileutl.h
@@ -97,6 +97,7 @@ bool FileExists(string File);
 bool RealFileExists(string File);
 bool DirectoryExists(string const &Path) __attrib_const;
 bool CreateDirectory(string const &Parent, string const &Path);
+time_t GetModificationTime(string const &Path);
 
 /** \brief Ensure the existence of the given Path
  *