migrate env handling to dotenv

Pipfile

@@ -9,8 +9,9 @@ name = "pypi"
 
 cssselect = "*"
 lxml = "*"
-"mastodon.py" = "*"
+"Mastodon.py" = "*"
-youtube-dl = "*"
+youtube_dl = "*"
+python-dotenv = "*"
 
 
 [dev-packages]

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "f0d0df34026363f209c1bda09fac7757ccdd8e90d348cba74e5aa278850abe5d"
+            "sha256": "f73fe1eabc45c7e9153c6512b0a96453287660e8a6c78539eb32a539211d71eb"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -101,6 +101,14 @@
             ],
             "version": "==2.7.0"
         },
+        "python-dotenv": {
+            "hashes": [
+                "sha256:4965ed170bf51c347a89820e8050655e9c25db3837db6602e906b6d850fad85c",
+                "sha256:509736185257111613009974e666568a1b031b028b61b500ef1ab4ee780089d5"
+            ],
+            "index": "pypi",
+            "version": "==0.8.2"
+        },
         "pytz": {
             "hashes": [
                 "sha256:07edfc3d4d2705a20a6e99d97f0c4b61c800b8232dc1c04d87e8554f130148dd",

fediplay/env.py

@@ -0,0 +1,17 @@
+'''Environment variable management.'''
+
+from os import getenv
+
+from dotenv import load_dotenv, find_dotenv
+
+def api_base_url():
+    return getenv('FEDIPLAY_API_BASE_URL')
+
+def no_check_certificate():
+    return bool(getenv('FEDIPLAY_NO_CHECK_CERTIFICATE'))
+
+def play_command():
+    return (getenv('FEDIPLAY_PLAY_COMMAND') or
+            'ffplay -v 0 -nostats -hide_banner -autoexit -nodisp {filename}')
+
+load_dotenv(find_dotenv())

fediplay/main.py

@@ -1,16 +1,17 @@
 '''Entry point for command-line interface.'''
 
-from os import path, environ
+from os import path
 import sys
 
 from mastodon import Mastodon
 
+import fediplay.env as env
 from fediplay.mastodon import stream, register, login
 
 def main():
     '''Run fediplay command-line interface.'''
 
-    api_base_url = environ.get('FEDIPLAY_API_BASE_URL')
+    api_base_url = env.api_base_url()
     if not api_base_url:
         print('FEDIPLAY_API_BASE_URL environment variable not set')
         sys.exit(1)

fediplay/queue.py

@@ -1,12 +1,13 @@
 '''The play queue.'''
 
-from os import environ
 import shlex
 from subprocess import run
 from threading import Thread, Lock
 
 from youtube_dl import YoutubeDL
 
+import fediplay.env as env
+
 class Queue(object):
     '''The play queue.'''
 
@@ -64,7 +65,7 @@ class Getter(object):
 
         options = {
             'format': 'mp3/mp4',
-            'nocheckcertificate': 'FEDIPLAY_NO_CHECK_CERTIFICATE' in environ,
+            'nocheckcertificate': env.no_check_certificate(),
             'progress_hooks': [self._progress_hook]
         }
         with YoutubeDL(options) as downloader:
@@ -76,8 +77,5 @@ def build_play_command(filename):
     '''Builds a play command for the given filename.'''
 
     escaped_filename = shlex.quote(filename)
-    template = environ.get(
+    template = env.play_command()
-        'FEDIPLAY_PLAY_COMMAND',
-        'ffplay -v 0 -nostats -hide_banner -autoexit -nodisp {filename}'
-    )
     return template.format(filename=escaped_filename)