edsm-getnearest.py

Now in a usable form with help text and stuff. Bear with me, I literally
picked Python up again about today after having used it like 5y ago on
for completely unrelated things.

README.md

@@ -0,0 +1,21 @@
+# A collection fo useful scripts around Elite Dangerous #
+
+## edsm-getnearest.py ##
+
+```
+usage: edsm-getnearest.py [-h] --system SYSTEM [--short] [--gui | --text]
+                          CMDR [CMDR ...]
+
+Locate your CMDRs using EDSM and find their distance to a given system.
+
+positional arguments:
+  CMDR             a list of CMDR names (must have their location public on
+                   EDSM!)
+
+optional arguments:
+  -h, --help       show this help message and exit
+  --system SYSTEM  the target system (must be in EDDN!)
+  --short          short output (only makes sense with `--text`)
+  --gui            explicitly run the GUI
+  --text           explicitly give text output
+```

edsm-getnearest.py

@@ -1,13 +1,11 @@
 #!/usr/bin/env python3
+import argparse
 import math
 import requests
 import sys
 import tkinter as tk
 
-from tkinter import messagebox
-
-if len(sys.argv) < 3:
-    exit(1)
+# =================================================================================
 
 class EdsmApiException(Exception):
   pass
@@ -45,6 +43,8 @@ def getDistances (system, cmdrs):
     distances[cmdr] = round(distance(cmdrcoords, systemcoords))
   return distances
 
+# =================================================================================
+
 def outputGui():
   def runsearch(event=None):
     for child in frame.winfo_children():
@@ -79,11 +79,13 @@ def outputGui():
   frame.grid(row=1, columnspan=3)
   btn = tk.Button(window, text='get distances', command=runsearch)
   btn.grid(row=0, column=2)
-    window.geometry('450x200+550+-650')
   window.bind('<Return>', runsearch)
   window.attributes('-topmost', True)
+  runsearch()
   window.mainloop()
 
+# =================================================================================
+
 def outputText():
   try:
     distances = getDistances(system, cmdrs)
@@ -91,18 +93,44 @@ def outputText():
     print(e)
     exit(1)
   nearestCmdr = min(distances,key=distances.get)
+  if shortOutput:
+    print('nearest CMDR: {} ({} ly)'.format(nearestCmdr, 
+      distances[nearestCmdr]))
+  else:
     print('nearest CMDR: {} ({} ly from {})'.format(nearestCmdr, 
       distances[nearestCmdr], system))
     print()
     for cmdr in distances:
       print('{}: {} ly'.format(cmdr, distances[cmdr]))
 
-sys.argv.pop(0) # script name
-system = sys.argv.pop(0)
-cmdrs = sys.argv
+# =================================================================================
 
+parser = argparse.ArgumentParser(description='Locate your CMDRs using EDSM and '
+    + 'find their distance to a given system.')
+parser.add_argument('cmdrs', metavar='CMDR', nargs='+', help='a list of CMDR names '
+    + '(must have their location public on EDSM!)')
+parser.add_argument('--system', nargs=1, help='the target system (must be in '
+    + 'EDDN!)', required=True)
+parser.add_argument('--short', action='store_true', help='short output (only '
+    + 'makes sense with `--text`)')
+group = parser.add_mutually_exclusive_group()
+group.add_argument('--gui', action='store_true', help='explicitly run the GUI')
+group.add_argument('--text', action='store_true', help='explicitly give text output')
+
+args = parser.parse_args()
+
+system = args.system[0]
+cmdrs = args.cmdrs
+shortOutput = args.short
+
+# =================================================================================
+
+if args.text:
+  outputText()
+elif args.gui:
   outputGui()
-# try:
-    # outputGui()
-# except tk.TclError:
-    # outputText()
+else:
+  try:
+    outputGui()
+  except tk.TclError:
+    outputText()