1 files changed, 29 insertions, 0 deletions
diff --git a/util/runners.py b/util/runners.py
new file mode 100644
index 0000000..9252d86
--- /dev/null
+++ b/util/runners.py
@@ -0,0 +1,29 @@
+import os
+import re
+from util.exceptions import StepFailedError
+
+HOME = os.getenv("HOME")
+
+
+def run_step(step):
+    step_type = step["=="]
+
+    if step_type == "run":
+        do_run(step["command"])
+    elif step_type == "link":
+        do_link(step["from"], step["to"])
+
+
+def do_run(command):
+    print(f"! {command}")
+    if not os.system(command) == 0:
+        raise StepFailedError("Non-zero return code")
+
+
+def do_link(source, destination):
+    destination = re.sub(r"^~/", HOME + "/", destination)
+    print(f"Linking {source} -> {destination}")
+    try:
+        os.link(source, destination)
+    except Exception as e:
+        raise StepFailedError("Link raised exeption: " + str(e)) from e