save a pbuilder log for each run

For whatever reason, pbuilder likes to truncate the log file as it
starts, so we can't collect them all into one file, which is what I
thought we were doing.

1 files changed, 5 insertions, 2 deletions

diff --git a/unperish b/unperish
index 33e8e85..ebe3f61 100755
--- a/unperish
+++ b/unperish
@@ -263,13 +263,16 @@ class Unperish(cliapp.Application):
                 self.add_debian_changelog_entry(target)
             for arch, path in targets[target]:
                 self.run_subcommand('dsc', force=True)
-                if not self.already_exists(self.join(self.changes(arch))):
+                changes = self.join(self.changes(arch))
+                if not self.already_exists(changes):
+                    prefix, ext = os.path.splitext(changes)
+                    logfile = prefix + '.pbuilder.log'
                     argv = ['sudo', 
                             'pbuilder', 
                             '--build', 
                             '--basetgz', path,
                             '--buildresult', self.settings['build-area'],
-                            '--logfile', self.join('pbuilder.log')]
+                            '--logfile', logfile]
                     if self.include_source():
                         argv.extend(['--debbuildopts', '-sa'])
                     if self.settings['binary-arch']: