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  1. Jul 28, 2021
  2. Jul 05, 2021
  3. Jul 02, 2021
  4. Jun 30, 2021
  5. Jun 28, 2021
  6. Jun 15, 2021
  7. Jun 08, 2021
    • Simon McVittie's avatar
      mtree: Parse the ignore, nochange and optional flags · 16e20ba0
      Simon McVittie authored
      
      The nochange flag is fully implemented here: it suppresses changing the
      modification time or permissions.
      
      The optional flag is mostly implemented here: it suppresses the error
      that would ordinarily occur if a file with content does not already
      exist.
      
      The ignore flag is not yet implemented, only parsed, because it only
      really applies when verifying whether a filesystem tree matches a
      specification.
      
      Signed-off-by: default avatarSimon McVittie <smcv@collabora.com>
      16e20ba0
    • Simon McVittie's avatar
      mtree: Parse modification times in a compatible way · c1cba1a3
      Simon McVittie authored
      
      time=1.234 has historically meant 1 second + 234 nanoseconds, or what
      normal people would write as 1.000000234. Parse it as such, but for now
      treat this ambiguous format as an error, unless the fractional part is
      exactly ".0" which is unambiguous - we can relax this to a warning
      later, if we want to.
      
      libarchive and FreeBSD mtree show mtimes with exactly 9 decimal digits,
      which makes them mean the same thing in either interpretation.
      
      Signed-off-by: default avatarSimon McVittie <smcv@collabora.com>
      c1cba1a3
  8. May 20, 2021
  9. May 12, 2021
  10. May 11, 2021
  11. Apr 30, 2021
    • Simon McVittie's avatar
      runtime: Add support for creating runtime from a mtree(5) · 799b7931
      Simon McVittie authored
      
      At the moment we deploy the runtime from a giant tarball to avoid Steam
      downloader limitations, but that leads to a noticeable delay the first
      time we launch a game after a new runtime version has been downloaded.
      
      Now that the Steam download mechanism can deal better with larger
      numbers of smaller files, we're considering returning to the original
      design where the runtime depot contains unpacked files. However, the
      Steam download mechanism doesn't preserve permissions, modification
      times, or filenames that differ only by case, and has not always
      preserved empty directories, so we need a way to deal with all of
      those things.
      
      By reading a manifest written in a subset of the BSD mtree(5) format,
      we can create directories and symlinks, and set permissions modification
      times on regular files. As a bonus, it's actually slightly faster to
      duplicate a runtime with hard-links (--copy-runtime mode) by reading the
      manifest than by reading the actual directory tree, because the manifest
      is more likely to be contiguous on disk.
      
      In principle the mtree(5) manifest could also be used to validate that
      the runtime content has not become corrupted by checking files against
      their sha256sums. This isn't implemented here (and it would have to be
      done only on demand rather than routinely, because it would be slow),
      but the parser does at least read the sha256.
      
      In the tests, we now need to remove the mtree manifest when copying
      and editing a runtime. When we edit a runtime in-place, it no longer
      conforms to the manifest, so this can't necesarily be expected to work.
      
      Signed-off-by: default avatarSimon McVittie <smcv@collabora.com>
      799b7931
    • Simon McVittie's avatar
      pressure-vessel: Add code to parse and apply a mtree(5) manifest · 1bdf777d
      Simon McVittie authored
      
      This can be used to create directories, symlinks and zero-byte files,
      create files as a clone (hard-link or copy) of files in a reference
      directory, assert that files exist, set executable/non-executable
      permissions, and set files' modification times.
      
      When cloning files from a reference directory, the default is to use
      the same filename as the destination, but that can be overridden
      (for example to deal with inconvenient/non-Windows-friendly filenames).
      This is also actually slightly faster than pv_cheap_tree_copy(),
      presumably because the manifest is contiguous on-disk and the
      directories are not necessarily.
      
      Setting directories' modification times is implemented, but probably
      won't work in practice, because any files we create in the directory
      will alter its mtime.
      
      Signed-off-by: default avatarSimon McVittie <smcv@collabora.com>
      1bdf777d
  12. Apr 27, 2021
  13. Apr 22, 2021
  14. Apr 21, 2021
  15. Apr 15, 2021
  16. Mar 23, 2021
  17. Mar 16, 2021
  18. Mar 04, 2021
  19. Feb 25, 2021
  20. Feb 23, 2021
  21. Feb 22, 2021
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