Added: Fabric features

* default_hosts decorator
 * filelist from git diff feature
 * task to run tests

fabfile/__init__.py

@@ -17,7 +17,7 @@ For more help on a particular command
 
 from fabric.api import env
 
-from fabfile.tasks import code_quality
+from fabfile.tasks import code_quality, test
 
 
 # Without this, `fab -l` would display the whole docstring as preamble
@@ -26,6 +26,7 @@ __doc__ = ""
 # This list defines which tasks are made available to the user
 __all__ = [
     "code_quality",
+    "test",
 ]
 
 # Honour the user's ssh client configuration

fabfile/lib.py

@@ -6,8 +6,10 @@ A library of functions and constants for tasks to make use of.
 
 import os
 import sys
+import re
+from functools import wraps
 
-from fabric.api import run, hide
+from fabric.api import run, hide, cd, env
 from fabric.context_managers import settings, shell_env
 from fabvenv import virtualenv
 
@@ -18,6 +20,14 @@ VENV_ROOT = os.path.expanduser(os.path.join('~', '.virtualenvs', 'pybitmessage-d
 PYTHONPATH = os.path.join(PROJECT_ROOT, 'src',)
 
 
+def coerce_list(value):
+    """Coerce a value into a list"""
+    if isinstance(value, str):
+        return value.split(',')
+    else:
+        sys.exit("Bad string value {}".format(value))
+
+
 def coerce_bool(value):
     """Coerce a value into a boolean"""
     if isinstance(value, bool):
@@ -51,6 +61,29 @@ def flatten(data):
     return result
 
 
+def filelist_from_git(rev=None):
+    """Return a list of files based on git output"""
+    cmd = 'git diff --name-only'
+    if rev:
+        if rev in ['cached', 'staged']:
+            cmd += ' --{}'.format(rev)
+        elif rev == 'working':
+            pass
+        else:
+            cmd += ' -r {}'.format(rev)
+
+    with cd(PROJECT_ROOT):
+        with hide('running', 'stdout'):
+            results = []
+            ansi_escape = re.compile(r'\x1B\[[0-?]*[ -/]*[@-~]')
+            clean = ansi_escape.sub('', run(cmd))
+            clean = re.sub('\n', '', clean)
+            for line in clean.split('\r'):
+                if line.endswith(".py"):
+                    results.append(os.path.abspath(line))
+            return results
+
+
 def pycodestyle(path_to_file):
     """Run pycodestyle on a file"""
     with virtualenv(VENV_ROOT):
@@ -148,3 +181,20 @@ def get_filtered_pylint_output(path_to_file):
             not i.startswith('Using config file'),
         ])
     ]
+
+
+def default_hosts(hosts):
+    """Decorator to apply default hosts to a task"""
+
+    def real_decorator(func):
+        """Manipulate env"""
+        env.hosts = env.hosts or hosts
+
+        @wraps(func)
+        def wrapper(*args, **kwargs):
+            """Original function called from here"""
+            return func(*args, **kwargs)
+
+        return wrapper
+
+    return real_decorator

fabfile/tasks.py

@@ -1,8 +1,6 @@
 # pylint: disable=not-context-manager
 """
 Fabric tasks for PyBitmessage devops operations.
-
-# pylint: disable=not-context-manager
 """
 
 import os
@@ -12,7 +10,7 @@ from fabric.api import run, task, hide, cd
 from fabvenv import virtualenv
 
 from fabfile.lib import (
-    autopep8, PROJECT_ROOT, VENV_ROOT, coerce_bool, flatten,
+    autopep8, PROJECT_ROOT, VENV_ROOT, coerce_bool, flatten, filelist_from_git, default_hosts,
     get_filtered_pycodestyle_output, get_filtered_flake8_output, get_filtered_pylint_output,
 )
 
@@ -39,7 +37,7 @@ def get_tool_results(file_list):
 def print_results(results, top, verbose, details):
     """Print an item with the appropriate verbosity / detail"""
 
-    if verbose:
+    if verbose and results:
         print ''.join(
             [
                 os.linesep,
@@ -117,7 +115,8 @@ def generate_file_list(filename):
 
 
 @task
-def code_quality(verbose=True, details=False, fix=False, filename=None, top=10):
+@default_hosts(['localhost'])
+def code_quality(verbose=True, details=False, fix=False, filename=None, top=10, rev=None):
     """
     Check code quality.
 
@@ -128,6 +127,8 @@ def code_quality(verbose=True, details=False, fix=False, filename=None, top=10):
 
     $ fab -H localhost code_quality
 
+    :param rev: If not None, act on files changed since this commit. 'cached/staged' and 'working' have special meaning
+    :type rev: str or None, default None
     :param top: Display / fix only the top N violating files, a value of 0 will display / fix all files
     :type top: int, default 10
     :param verbose: Display a header and the counts, without this you just get the filenames in order
@@ -146,13 +147,14 @@ def code_quality(verbose=True, details=False, fix=False, filename=None, top=10):
     Intended to be temporary until we have improved code quality and have safeguards to maintain it in place.
 
     """
+    # pylint: disable=too-many-arguments
 
     verbose = coerce_bool(verbose)
     details = coerce_bool(details)
     fix = coerce_bool(fix)
     top = int(top) or -1
 
-    file_list = generate_file_list(filename)
+    file_list = generate_file_list(filename) if not rev else filelist_from_git(rev)
     results = get_tool_results(file_list)
 
     if fix:
@@ -163,3 +165,18 @@ def code_quality(verbose=True, details=False, fix=False, filename=None, top=10):
 
     print_results(results, top, verbose, details)
     sys.exit(sum([item['total_violations'] for item in results]))
+
+
+@task
+@default_hosts(['localhost'])
+def test():
+    """Run tests on the code"""
+
+    with cd(PROJECT_ROOT):
+        with virtualenv(VENV_ROOT):
+
+            run('pip uninstall -y pybitmessage')
+            run('python setup.py install')
+
+            run('pybitmessage -t')
+            run('python setup.py test')