1 files changed, 34 insertions, 0 deletions
diff --git a/dotbot/util/common.py b/dotbot/util/common.py
new file mode 100644
index 0000000..d1e2000
--- /dev/null
+++ b/dotbot/util/common.py
@@ -0,0 +1,34 @@
+import os
+import subprocess
+import platform
+
+
+def shell_command(command, cwd=None, enable_stdin=False, enable_stdout=False, enable_stderr=False):
+    with open(os.devnull, 'w') as devnull_w, open(os.devnull, 'r') as devnull_r:
+        stdin = None if enable_stdin else devnull_r
+        stdout = None if enable_stdout else devnull_w
+        stderr = None if enable_stderr else devnull_w
+        executable = os.environ.get('SHELL')
+        if platform.system() == 'Windows':
+            # We avoid setting the executable kwarg on Windows because it does
+            # not have the desired effect when combined with shell=True. It
+            # will result in the correct program being run (e.g. bash), but it
+            # will be invoked with a '/c' argument instead of a '-c' argument,
+            # which it won't understand.
+            #
+            # See https://github.com/anishathalye/dotbot/issues/219 and
+            # https://bugs.python.org/issue40467.
+            #
+            # This means that complex commands that require Bash's parsing
+            # won't work; a workaround for this is to write the command as
+            # `bash -c "..."`.
+            executable = None
+        return subprocess.call(
+            command,
+            shell=True,
+            executable=executable,
+            stdin=stdin,
+            stdout=stdout,
+            stderr=stderr,
+            cwd=cwd
+        )