move oneline() to gitutils.py

It has nothing to do with DependencyDetector, and this will let us
reuse it from git-explode too.

2 files changed, 9 insertions, 6 deletions

diff --git a/git_deps/detector.py b/git_deps/detector.py
index 4de1282..e64d17f 100644
--- a/git_deps/detector.py
+++ b/git_deps/detector.py
@@ -4,6 +4,7 @@ import subprocess
 import pygit2
 
 from git_deps.utils import abort, standard_logger
+from git_deps.gitutils import GitUtils
 from git_deps.listener.base import DependencyListener
 from git_deps.errors import InvalidCommitish
 
@@ -168,7 +169,7 @@ class DependencyDetector(object):
         dependent_sha1 = dependent.hex
         if dependent_sha1 not in self.dependencies:
             self.logger.debug('        New dependent: %s (%s)' %
-                              (dependent_sha1[:8], self.oneline(dependent)))
+                              (dependent_sha1[:8], GitUtils.oneline(dependent)))
             self.dependencies[dependent_sha1] = {}
             self.notify_listeners('new_dependent', dependent)
 
@@ -188,7 +189,7 @@ class DependencyDetector(object):
                 self.logger.debug(
                     '        Excluding dependency %s from line %s (%s)' %
                     (dependency_sha1[:8], line_num,
-                     self.oneline(dependency)))
+                     GitUtils.oneline(dependency)))
                 continue
 
             if dependency_sha1 not in self.dependencies[dependent_sha1]:
@@ -206,7 +207,8 @@ class DependencyDetector(object):
 
                 self.logger.debug(
                     '        New dependency %s via line %s (%s)' %
-                    (dependency_sha1[:8], line_num, self.oneline(dependency)))
+                    (dependency_sha1[:8], line_num,
+                     GitUtils.oneline(dependency)))
                 self.dependencies[dependent_sha1][dependency_sha1] = {}
                 self.notify_listeners('new_commit', dependency)
                 self.notify_listeners('new_dependency',
@@ -248,9 +250,6 @@ class DependencyDetector(object):
             self.logger.debug(diff_format %
                               (rev, ln, line.origin, line.content.rstrip()))
 
-    def oneline(self, commit):
-        return commit.message.split('\n', 1)[0]
-
     def is_excluded(self, commit):
         if self.options.exclude_commits is not None:
             for exclude in self.options.exclude_commits:
diff --git a/git_deps/gitutils.py b/git_deps/gitutils.py
index f5d8281..ce80ad5 100644
--- a/git_deps/gitutils.py
+++ b/git_deps/gitutils.py
@@ -49,6 +49,10 @@ class GitUtils(object):
         return out
 
     @classmethod
+    def oneline(cls, commit):
+        return commit.message.split('\n', 1)[0]
+
+    @classmethod
     def refs_to(cls, sha1, repo):
         """Returns all refs pointing to the given SHA1."""
         matching = []