[DRE-maint] Bug#800108: gem2deb: permanently broken when cache is missing

[brian m. carlson]

On Sun, Sep 27, 2015 at 07:31:58PM -0300, Antonio Terceiro wrote:
> well, gem2deb notices the empty cache and tells you that you need to run
> `apt-file update` before continuing, so unless you show me how else it
> breaks, I suspect that there is nothing to fix here.

Ah, but it doesn't.  It produces the error in my original post, which
says that the cache will be regenerated, but doesn't say that it failed
because the apt-file data is missing.  For me, apt-file exited 0 (with
no output), meaning that it took the if branch in this block, not the
else branch:

  if system('apt-file search /usr/share/rubygems-integration/ > ' + cache + '.new')
    system('sed', '-i', '-e', 's#/.*/##; s/-[0-9.]\+.gemspec//', cache + '.new')
    FileUtils.mv(cache + '.new', cache)
  else
    puts 'E: dh-make-ruby needs an up-to-date apt-file cache in order to map gem names to package names'
    exit $?.exitstatus
  end

So it didn't say that apt-file was out of date.  If you change mirrors
in /etc/apt/sources.list, it will produce this error.  And since it's
hard (for me, at least) to find a Debian mirror that is both fast and
reliable, I end up doing this frequently, and this is an unhelpful
failure case.
-- 
brian m. carlson / brian with sandals: Houston, Texas, US
+1 832 623 2791 | https://www.crustytoothpaste.net/~bmc | My opinion only
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