fix: bash provider and examples (#828)

examples/workflows/bash_example.yml

@@ -0,0 +1,29 @@
+workflow:
+  id: Resend-Python-service
+  description: Python Resend Mail
+  triggers:
+  - type: manual
+  owners: []
+  services: []
+  steps:
+  - name: run-script
+    provider:
+      config: '{{ providers.default-bash }}'
+      type: bash
+      with:
+        command: python3 test.py
+        timeout: 5
+  actions:
+  - condition:
+    - assert: '{{ steps.run-script.results.return_code }} == 0'
+      name: assert-condition
+      type: assert
+    name: trigger-resend
+    provider:
+          type: resend
+          config: "{{ providers.resend-test }}"
+          with:
+            _from: "[email protected]"
+            to: "[email protected]"
+            subject: "Python test is up!"
+            html: <p>Python test is up!</p>

keep/providers/bash_provider/bash_provider.py

@@ -25,6 +25,7 @@ def _query(self, **kwargs):
         Returns:
             _type_: _description_
         """
+        timeout = kwargs.get("timeout", 60)
         command = kwargs.get("command", "")
         parsed_command = self.io_handler.parse(command)
         # parse by pipes
@@ -57,14 +58,31 @@ def _query(self, **kwargs):
             processes.append(process)
 
         # Get the final output
-        stdout, stderr = processes[-1].communicate()
-        return_code = processes[-1].returncode
-        # stdout and stderr are strings or None
-        if stdout:
-            stdout = stdout.decode()
-
-        if stderr:
-            stderr = stderr.decode()
+        try:
+            stdout, stderr = processes[-1].communicate(timeout=timeout)
+            return_code = processes[-1].returncode
+            # stdout and stderr are strings or None
+            if stdout or stdout == b"":
+                stdout = stdout.decode()
+
+            if stderr or stderr == b"":
+                stderr = stderr.decode()
+        except subprocess.TimeoutExpired:
+            # use check_output to get the output of the last process
+            # this is some MacOS bug, where communicate() doesn't work and raise TimeoutExpired (idk why but it works on Linux)
+            try:
+                self.logger.warning("TimeoutExpired, using check_output - MacOS bug?")
+                stdout = subprocess.check_output(
+                    cmd, stderr=subprocess.STDOUT, timeout=timeout, shell=True
+                ).decode()
+                stderr = None
+                return_code = 0
+                self.logger.warning("check_output worked")
+            # todo: fix that
+            except Exception as e:
+                stdout = None
+                stderr = e.args[1].decode()
+                return_code = e.args[0]
 
         return {
             "stdout": str(stdout),