fix Python 3 uses of subprocess.check_output

https://stackoverflow.com/questions/15817420/subprocess-and-type-str-doesnt-support-the-buffer-api/15817457#15817457

3 files changed, 8 insertions, 6 deletions

diff --git a/git_deps/detector.py b/git_deps/detector.py
index 3111a38..df5b001 100644
--- a/git_deps/detector.py
+++ b/git_deps/detector.py
@@ -169,7 +169,7 @@ class DependencyDetector(object):
             '-L', "%d,+%d" % (hunk.old_start, hunk.old_lines),
             parent.hex, '--', path
         ]
-        blame = subprocess.check_output(cmd)
+        blame = subprocess.check_output(cmd, universal_newlines=True)
 
         dependent_sha1 = dependent.hex
         if dependent_sha1 not in self.dependencies:
@@ -288,7 +288,7 @@ class DependencyDetector(object):
 
         cmd = ['git', 'merge-base', sha1, branch_sha1]
         # self.logger.debug("   ".join(cmd))
-        out = subprocess.check_output(cmd).strip()
+        out = subprocess.check_output(cmd, universal_newlines=True).strip()
         self.logger.debug("          merge-base returned: %s" % out[:8])
         result = out == sha1
         self.logger.debug("            %s" % result)
diff --git a/git_deps/gitutils.py b/git_deps/gitutils.py
index f7b5470..f699551 100644
--- a/git_deps/gitutils.py
+++ b/git_deps/gitutils.py
@@ -15,7 +15,7 @@ class GitUtils(object):
         # we will be able to do this via pygit2.
         cmd = ['git', 'rev-parse', '--short', sha1]
         # cls.logger.debug(" ".join(cmd))
-        out = subprocess.check_output(cmd).strip()
+        out = subprocess.check_output(cmd, universal_newlines=True).strip()
         # cls.logger.debug(out)
         return out
 
@@ -39,7 +39,8 @@ class GitUtils(object):
         # cls.logger.debug(" ".join(cmd))
         out = None
         try:
-            out = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
+            out = subprocess.check_output(
+                cmd, stderr=subprocess.STDOUT, universal_newlines=True)
         except subprocess.CalledProcessError as e:
             if e.output.find('No tags can describe') != -1:
                 return ''
@@ -77,7 +78,8 @@ class GitUtils(object):
     @classmethod
     def rev_list(cls, rev_range):
         cmd = ['git', 'rev-list', rev_range]
-        return subprocess.check_output(cmd).strip().split('\n')
+        return subprocess.check_output(cmd, universal_newlines=True) \
+                         .strip().split('\n')
 
     @classmethod
     def ref_commit(cls, repo, rev):
diff --git a/git_deps/listener/cli.py b/git_deps/listener/cli.py
index 285c622..01bf4df 100644
--- a/git_deps/listener/cli.py
+++ b/git_deps/listener/cli.py
@@ -46,7 +46,7 @@ class CLIDependencyListener(DependencyListener):
                 'log', '-n1',
                 dependency_sha1
             ]
-            print(subprocess.check_output(cmd))
+            print(subprocess.check_output(cmd, universal_newlines=True))
             # dependency = detector.get_commit(dependency_sha1)
             # print(dependency.message + "\n")