From 739075d2dfde7711b169575f427ee8929697a91b Mon Sep 17 00:00:00 2001
From: "Elf M. Sternberg" <elf.sternberg@gmail.com>
Date: Fri, 30 Sep 2016 11:15:10 -0700
Subject: [PATCH] Experimental and not yet reliable.

---
 git_lint/__main__.py | 64 +++++++++++++++++++++++++++++++++++++++++---
 git_lint/options.py  |  5 +++-
 2 files changed, 65 insertions(+), 4 deletions(-)

diff --git a/git_lint/__main__.py b/git_lint/__main__.py
index 7e8ae40..5e8ff6c 100644
--- a/git_lint/__main__.py
+++ b/git_lint/__main__.py
@@ -5,7 +5,17 @@ from .option_handler import cleanup_options
 from .reporters import print_report, print_help, print_linters
 from .git_lint import load_config, run_linters, git_base
 from getopt import GetoptError
+import os.path
 import sys
+import time
+
+watchdog = False
+try:
+    import watchdog
+    from watchdog.observers import Observer
+    from watchdog.events import RegexMatchingEventHandler
+except Exception as e:
+    pass
 
 import gettext
 _ = gettext.gettext
@@ -14,11 +24,56 @@ NAME = 'git-lint'
 VERSION = '0.0.4'
 
 
+def remove_unavailable_options(options):
+    failures = [] + ((watchdog == False and ['monitor']) or [])
+    return filter(lambda i: i[1] not in failures, options)
+
+
+def monitor(options, config, filenames):
+
+    observer = watchdog.observers.Observer()
+    skip = ['\.git/']
+
+    def run_monitor_linters():
+        (results,
+         unlintable_filenames,
+         cant_lint_filenames,
+         broken_linter_names,
+         unfindable_filenames) = run_linters(options, config, filenames)
+        
+        print_report(results,
+                     unlintable_filenames,
+                     cant_lint_filenames,
+                     broken_linter_names,
+                     unfindable_filenames,
+                     options)
+
+    class LintMonitor(RegexMatchingEventHandler):
+        def __init__(self):
+            super(LintMonitor, self).__init__(ignore_regexes=skip)
+
+        def on_created(self, event):
+            run_monitor_linters()
+
+        def on_modified(self, event):
+            run_monitor_linters()
+
+    observer.schedule(LintMonitor(), git_base, recursive=True)
+    observer.start()
+    try:
+        while True:
+            time.sleep(1)
+    except KeyboardInterrupt:
+        observer.stop()
+    observer.join()
+
+            
 def main():
     if git_base is None:
         sys.exit(_('A git repository was not found.'))
 
-    (options, filenames, excluded_commands) = cleanup_options(OPTIONS, sys.argv)
+    initial_options = remove_unavailable_options(OPTIONS)
+    (options, filenames, excluded_commands) = cleanup_options(initial_options, sys.argv)
 
     if len(excluded_commands) > 0:
         print(_('These command line options were ignored due to option precedence.'))
@@ -29,7 +84,7 @@ def main():
         config = load_config(options, git_base)
 
         if 'help' in options:
-            print_help(OPTIONS, NAME)
+            print_help(initial_options, NAME)
             return 0
 
         if 'version' in options:
@@ -43,6 +98,9 @@ def main():
             print_linters(config, broken_linter_names)
             return 0
 
+        if 'monitor' in options:
+            return monitor(options, config, filenames)
+
         (results,
          unlintable_filenames,
          cant_lint_filenames,
@@ -62,7 +120,7 @@ def main():
         return max([i[2] for i in results if len(i)])
 
     except GetoptError as err:
-        print_help(OPTIONS)
+        print_help(initial_options)
         return 1
     
 
diff --git a/git_lint/options.py b/git_lint/options.py
index 4de6235..807fc36 100644
--- a/git_lint/options.py
+++ b/git_lint/options.py
@@ -17,7 +17,7 @@ OPTIONS = [
     ('w', 'workspace', False,
      _('Scan the workspace'), ['staging']),
     ('s', 'staging', False,
-     _('Scan the staging area (useful for pre-commit).'), []),
+     _('Scan the staging area (useful for pre-commit).'), ['monitor']),
     ('g', 'changes', False,
      _("Report lint failures only for diff'd sections"), ['complete']),
     ('p', 'complete', False,
@@ -28,6 +28,8 @@ OPTIONS = [
      _('Group the reports by file first'), []),
     ('d', 'dryrun', False,
      _('Dry run - report what would be done, but do not run linters'), []),
+    ('m', 'monitor', False,
+     _('Run continuously, monitoring filesytem for changes'), []),
     ('c', 'config', True,
      _('Path to config file'), []),
     ('h', 'help', False,
@@ -35,3 +37,4 @@ OPTIONS = [
     ('v', 'version', False,
      _('Version information'), [])
 ]
+