* Canonicalise timestamps in the Nix store to 1 (1970-01-01 00:00:01

UTC) rather than 0 (00:00:00).  1 is a better choice because some
  programs use 0 as a special value.  For instance, the Template
  Toolkit uses a timestamp of 0 to denote the non-existence of a file,
  so it barfs on files in the Nix store (see
  template-toolkit-nix-store.patch in Nixpkgs).  Similarly, Maya 2008
  fails to load script directories with a timestamp of 0 and can't be
  patched because it's closed source.

  This will also shut up those "implausibly old time stamp" GNU tar
  warnings.
This commit is contained in:
Eelco Dolstra 2009-06-13 16:30:58 +00:00
parent f24cf5d303
commit 14bc3ce3d6
3 changed files with 4 additions and 4 deletions

View file

@ -1432,7 +1432,7 @@ command-line argument. See <xref linkend='sec-standard-environment'
inputs.</para></listitem>
<listitem><para>After the build, Nix sets the last-modified
timestamp on all files in the build result to 0 (00:00:00 1/1/1970
timestamp on all files in the build result to 1 (00:00:01 1/1/1970
UTC), sets the group to the default group, and sets the mode of the
file to 0444 or 0555 (i.e., read-only, with execute permission
enabled if the file was originally executable). Note that possible

View file

@ -153,7 +153,7 @@ void canonicalisePathMetaData(const Path & path, bool recurse)
if (st.st_mtime != 0) {
struct utimbuf utimbuf;
utimbuf.actime = st.st_atime;
utimbuf.modtime = 0;
utimbuf.modtime = 1; /* 1 second into the epoch */
if (utime(path.c_str(), &utimbuf) == -1)
throw SysError(format("changing modification time of `%1%'") % path);
}

View file

@ -190,8 +190,8 @@ void copyPath(const Path & src, const Path & dst);
/* "Fix", or canonicalise, the meta-data of the files in a store path
after it has been built. In particular:
- the last modification date on each file is set to 0 (i.e.,
00:00:00 1/1/1970 UTC)
- the last modification date on each file is set to 1 (i.e.,
00:00:01 1/1/1970 UTC)
- the permissions are set of 444 or 555 (i.e., read-only with or
without execute permission; setuid bits etc. are cleared)
- the owner and group are set to the Nix user and group, if we're