☝🧐 — Validate config file readability

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [Unreleased]
 
 - 🐛 — Fix --config option for some commands
+- ☝️🧐 — Validate config file readability
 
 ## 0.1.0
 

argos/commands.py

@@ -31,6 +31,16 @@ def coroutine(f):
     return wrapper
 
 
+def validate_config_access(ctx, param, value):
+    if os.path.isfile(value) and os.access(value, os.R_OK):
+        return value
+
+    if os.path.isfile(value):
+        raise click.BadParameter(f"the file {value} is not readabale.")
+
+    raise click.BadParameter(f"the file {value} does not exists or is not reachable.")
+
+
 @click.group()
 def cli():
     pass
@@ -93,6 +103,7 @@ def agent(server_url, auth, max_tasks, wait_time, log_level):
     help="Path of the configuration file. "
     "If ARGOS_YAML_FILE environment variable is set, its value will be used instead.",
     envvar="ARGOS_YAML_FILE",
+    callback=validate_config_access,
 )
 @click.option("--reload", is_flag=True, help="Enable hot reloading")
 def start(host, port, config, reload):
@@ -140,6 +151,7 @@ def validate_max_results(ctx, param, value):
     help="Path of the configuration file. "
     "If ARGOS_YAML_FILE environment variable is set, its value will be used instead.",
     envvar="ARGOS_YAML_FILE",
+    callback=validate_config_access,
 )
 @coroutine
 async def cleandb(max_results, max_lock_seconds, config):
@@ -170,6 +182,7 @@ async def cleandb(max_results, max_lock_seconds, config):
     help="Path of the configuration file. "
     "If ARGOS_YAML_FILE environment variable is set, its value will be used instead.",
     envvar="ARGOS_YAML_FILE",
+    callback=validate_config_access,
 )
 @coroutine
 async def reload_config(config):
@@ -200,6 +213,7 @@ async def reload_config(config):
     help="Path of the configuration file. "
     "If ARGOS_YAML_FILE environment variable is set, its value will be used instead.",
     envvar="ARGOS_YAML_FILE",
+    callback=validate_config_access,
 )
 @coroutine
 async def migrate(config):