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* New primop builtins.filterSource, which can be used to filter files

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from a source directory.  All files for which a predicate function
  returns true are copied to the store.  Typical example is to leave
  out the .svn directory:

    stdenv.mkDerivation {
      ...
      src = builtins.filterSource
        (path: baseNameOf (toString path) != ".svn")
        ./source-dir;
      # as opposed to
      #   src = ./source-dir;
    }

  This is important because the .svn directory influences the hash in
  a rather unpredictable and variable way.
This commit is contained in:
Eelco Dolstra 2006-12-12 23:05:01 +00:00
parent b438d37558
commit a3e6415ba8
19 changed files with 143 additions and 68 deletions
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8
src/libutil/archive.hh
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@ -45,16 +45,16 @@ namespace nix {
`+' denotes string concatenation. */
struct DumpFilter
struct PathFilter
{
virtual ~DumpFilter() { }
virtual ~PathFilter() { }
virtual bool operator () (const Path & path) { return true; }
};
extern DumpFilter defaultDumpFilter;
extern PathFilter defaultPathFilter;
void dumpPath(const Path & path, Sink & sink,
DumpFilter & filter = defaultDumpFilter);
PathFilter & filter = defaultPathFilter);
void restorePath(const Path & path, Source & source);