imalison python utilities

dotfiles/lib/python/imalison.py

@@ -0,0 +1,28 @@
+import os
+import errno
+from invoke import run
+
+
+def link_filenames(ctx, link_pairs, force=False):
+    for source, destination in link_pairs:
+        destination = os.path.expanduser(destination)
+        source = os.path.expanduser(source)
+        if force:
+            ctx.run("sudo rm -rf {0}".format(destination))
+        if os.path.exists(destination):
+            print("Skipping {0} because path already exists".format(destination))
+        else:
+            print("Linking {0} to {1}".format(destination, source))
+            ctx.run('ln -s {0} {1}'.format(source, destination))
+
+
+def ensure_path_exists(path):
+    try:
+        os.makedirs(path)
+    except OSError as exception:
+        if exception.errno != errno.EEXIST:
+            raise
+
+
+def command_exists(command, run=run):
+    return run("hash {0}".format(command), warn=True, hide=True).exited == 0