From 5060e28b539ab7de6e7747256aaea960f8b67a71 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20N=C3=B6the?= <maximilian.noethe@tu-dortmund.de>
Date: Tue, 11 May 2021 15:15:24 +0200
Subject: [PATCH 1/2] Add some useful short form alias to Tool and Stage1

---
 ctapipe/core/tool.py    |  8 ++++++--
 ctapipe/tools/stage1.py | 10 +++++-----
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/ctapipe/core/tool.py b/ctapipe/core/tool.py
index bbfb9293aa1..af4a70cd9f6 100644
--- a/ctapipe/core/tool.py
+++ b/ctapipe/core/tool.py
@@ -152,14 +152,18 @@ def __init__(self, **kwargs):
         # make sure there are some default aliases in all Tools:
         super().__init__(**kwargs)
         aliases = {
-            "config": "Tool.config_file",
+            ("c", "config"): "Tool.config_file",
             "log-level": "Tool.log_level",
             ("l", "log-file"): "Tool.log_file",
             "log-file-level": "Tool.log_file_level",
         }
         self.aliases.update(aliases)
         flags = {
-            ("q", "quiet"): ({"Tool": {"quiet": True}}, "Disable console logging.")
+            ("q", "quiet"): ({"Tool": {"quiet": True}}, "Disable console logging."),
+            ("v", "verbose"): (
+                {"Tool": {"log_level": "DEBUG"}},
+                "Set log level to DEBUG",
+            ),
         }
         self.flags.update(flags)
 
diff --git a/ctapipe/tools/stage1.py b/ctapipe/tools/stage1.py
index 3002b3c1372..4ea908b50b8 100644
--- a/ctapipe/tools/stage1.py
+++ b/ctapipe/tools/stage1.py
@@ -36,10 +36,10 @@ class Stage1Tool(Tool):
     progress_bar = Bool(help="show progress bar during processing").tag(config=True)
 
     aliases = {
-        "input": "EventSource.input_url",
-        "output": "DL1Writer.output_path",
-        "allowed-tels": "EventSource.allowed_tels",
-        "max-events": "EventSource.max_events",
+        ("i", "input"): "EventSource.input_url",
+        ("o", "output"): "DL1Writer.output_path",
+        ("t", "allowed-tels"): "EventSource.allowed_tels",
+        ("m", "max-events"): "EventSource.max_events",
         "image-cleaner-type": "ImageProcessor.image_cleaner_type",
     }
 
@@ -56,7 +56,7 @@ class Stage1Tool(Tool):
             {"DL1Writer": {"write_index_tables": True}},
             "generate PyTables index tables for the parameter and image datasets",
         ),
-        "overwrite": (
+        ("f", "overwrite"): (
             {"DL1Writer": {"overwrite": True}},
             "Overwrite output file if it exists",
         ),

From 82c4abeb39edf016a4f5d1fa67d173bcf6f52d1d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20N=C3=B6the?= <maximilian.noethe@tu-dortmund.de>
Date: Tue, 11 May 2021 15:15:39 +0200
Subject: [PATCH 2/2] Do not override aliases with defaults in Tool

---
 ctapipe/core/tool.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ctapipe/core/tool.py b/ctapipe/core/tool.py
index af4a70cd9f6..f2b7c093a41 100644
--- a/ctapipe/core/tool.py
+++ b/ctapipe/core/tool.py
@@ -157,7 +157,9 @@ def __init__(self, **kwargs):
             ("l", "log-file"): "Tool.log_file",
             "log-file-level": "Tool.log_file_level",
         }
-        self.aliases.update(aliases)
+        # makes sure user defined aliases override default aliases
+        self.aliases = {**aliases, **self.aliases}
+
         flags = {
             ("q", "quiet"): ({"Tool": {"quiet": True}}, "Disable console logging."),
             ("v", "verbose"): (