Re: [PATCH] package_deb: create md5sums control files

[Michael Smith <msmith@cbnco.com>]

OK to commit?

Mike

Michael Smith wrote:
> These are created with the package and get installed in
> /var/dpkg/info. Afterward it's a great way to find modified files
> for backup with a little shell script magic.
> 
> It feels a bit weird to still use MD5, but that seems to be the
> convention in the Debian world.
> 
> Signed-off-by: Michael Smith <msmith at cbnco.com>
> ---
>  classes/package.bbclass     |   45 +++++++++++++++++++++++++++++++++++++++++++
>  classes/package_deb.bbclass |    7 ++++++
>  2 files changed, 52 insertions(+), 0 deletions(-)
> 
> diff --git a/classes/package.bbclass b/classes/package.bbclass
> index f6bd7c5..e3f55b5 100644
> --- a/classes/package.bbclass
> +++ b/classes/package.bbclass
> @@ -202,6 +202,51 @@ def runstrip(file, d):
>  
>      return 1
>  
> +def write_package_md5sums (root, outfile, ignorepaths):
> +    # For each regular file under root, writes an md5sum to outfile.
> +    # With thanks to patch.bbclass.
> +    import bb, os
> +
> +    try:
> +        # Python 2.5+
> +        import hashlib
> +        ctor = hashlib.md5
> +    except ImportError:
> +        import md5
> +        ctor = md5.new
> +
> +    outf = file(outfile, 'w')
> +
> +    # Each output line looks like: "<hex...>  <filename without leading slash>"
> +    striplen = len(root)
> +    if not root.endswith('/'):
> +        striplen += 1
> +
> +    for walkroot, dirs, files in os.walk(root):
> +        # Skip e.g. the DEBIAN directory
> +        if walkroot[striplen:] in ignorepaths:
> +            dirs[:] = []
> +            continue
> +
> +        for name in files:
> +            fullpath = os.path.join(walkroot, name)
> +            if os.path.islink(fullpath) or (not os.path.isfile(fullpath)):
> +                continue
> +
> +            m = ctor()
> +            f = file(fullpath, 'rb')
> +            while True:
> +                d = f.read(8192)
> +                if not d:
> +                    break
> +                m.update(d)
> +            f.close()
> +
> +            print >> outf, "%s  %s" % (m.hexdigest(), fullpath[striplen:])
> +            
> +    outf.close()
> +
> +
>  #
>  # Package data handling routines
>  #
> diff --git a/classes/package_deb.bbclass b/classes/package_deb.bbclass
> index e5339a9..4a17010 100644
> --- a/classes/package_deb.bbclass
> +++ b/classes/package_deb.bbclass
> @@ -243,6 +243,13 @@ python do_package_deb () {
>                  conffiles.write('%s\n' % f)
>              conffiles.close()
>  
> +        try:
> +            write_package_md5sums(root, os.path.join(controldir, 'md5sums'),
> +                                  ['DEBIAN'])
> +        except:
> +            bb.utils.unlockfile(lf)
> +            raise
> +
>          os.chdir(basedir)
>          ret = os.system("PATH=\"%s\" fakeroot dpkg-deb -b %s %s" % (bb.data.getVar("PATH", localdata, 1), root, pkgoutdir))
>          if ret != 0: