Not depending on python-distro.

- Python-distro is new and isn't packaged in many distributions.
- Can just get the distribution ID directly.

install-dependencies

@@ -10,29 +10,22 @@ set -e
 DIST_ID=$(cat /etc/os-release | grep "^ID=" | cut -d "=" -f 2)
 if [ $DIST_ID == "fedora" ]; then
     INSTALL_CMD="dnf -y install"
-    DEPS="python3-distro python3-inotify python3-pygments python3-docopt python3-pillow"
+    DEPS="python3-inotify python3-pygments python3-docopt python3-pillow"
 elif [ $DIST_ID == "arch" ]; then
     INSTALL_CMD="pacman -S --noconfirm --needed"
     DEPS="python-pyinotify python-pygments python-docopt python-pillow"
-    sudo pacman -S --noconfirm python-pip
-    sudo pip3 install distro
 elif [ $DIST_ID == "opensuse" ]; then
     INSTALL_CMD="zypper -n install"
     DEPS="python3-pyinotify python3-Pygments python3-docopt python3-Pillow"
-    sudo pip3 install distro
 elif [ $DIST_ID == "debian" ]; then
     INSTALL_CMD="apt --yes install"
     DEPS="python3-pyinotify python3-pygments python3-docopt python3-pillow"
-    sudo apt --yes install python3-pip
-    sudo pip3 install distro
 elif [ $DIST_ID == "gentoo" ]; then
     INSTALL_CMD="emerge --noreplace"
     DEPS="pyinotify pygments docopt pillow"
-    emerge --noreplace dev-python/pip
-    sudo pip3 install --user distro
 else
     INSTALL_CMD="apt --yes install"
-    DEPS="python3-distro python3-pyinotify python3-pygments python3-docopt python3-pillow"
+    DEPS="python3-pyinotify python3-pygments python3-docopt python3-pillow"
 fi
 echo "Installing the dependencies of the vigil script..."
 sudo $INSTALL_CMD $DEPS util-linux

install-tools

@@ -4,12 +4,11 @@
 # Licensed under the Artistic License 2.0.
 
 
-import distro
 import subprocess
 import tools
 
 
-dist_id = distro.id()
+dist_id = tools.get_distro_id()
 pip_deps, pip3_deps, dist_deps = set(), set(), set()
 for dependency in tools.dependencies(dist_id):
     if "/" in dependency:

tools.py

@@ -23,7 +23,6 @@ import tempfile
 import time
 import traceback
 
-import distro
 import PIL.Image
 import pygments
 import pygments.lexers
@@ -878,9 +877,17 @@ def is_tool_in_distribution(tool, distribution):
         return tool
 
 
+def get_distro_id():
+    with open("/etc/os-release") as os_release_file:
+        for line in os_release_file:
+            if line.startswith("ID="):
+                return line[len("ID="):].strip()
+    raise AssertionError
+
+
 @functools.lru_cache(maxsize=1)
 def _tools_for_extension():
-    distribution = distro.id()
+    distribution = get_distro_id()
     result = {}
     for extensions, tools in TOOLS_FOR_EXTENSIONS:
         for extension in extensions: