good practice changes, removed config file, and replaced dc(1) with bc(1)

xdg-sanity

@@ -1,47 +1,45 @@
 #!/bin/sh
 
+# Copyright (c) 2022–2023 Emma Tebibyte
+# SPDX-License-Identifier: AGPL-3.0-or-later
+#
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+# 
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along
+# with this program. If not, see https://www.gnu.org/licenses/.
+
 set -e
 
 argv0="$0"
 
-# grabs configuration files
-CONFIG="$XDG_CONFIG_HOME"/xdg-sanity.toml
-if ! test -e "$CONFIG"; then
-  touch "$CONFIG"
-fi
-
 # check if usage is valid
-if ! test -n "$1"; then
+if test -z "$1"; then
   printf "Usage: %s [resource...]\n" "$argv0" 1>&2
   exit 64 # sysexits(3) EX_USAGE
 fi
 
-# check if we have curl(1)
-if ! command -v curl >/dev/null 2>&1; then
-  printf "%s: Missing dependency: curl(1)\n" "$argv0" 1>&2
+for dep in \
+  curl \
+  handlr \
+  tomcat
+do
+  if ! command -v "$dep" >/dev/null 2>&1; then
+    printf "%s: Missing dependency: %s(1)\n" "$argv0" "$dep" 1>&2
     exit 69 # sysexits(3) EX_UNAVAILABLE
   fi
-
-# check if we have tomcat(1)
-if ! command -v tomcat >/dev/null 2>&1; then
-  printf "%s: Missing dependency: tomcat(1)\n" "$argv0" 1>&2
-  exit 69 # sysexits(3) EX_UNAVAILABLE
-fi
-
-# set the XDG_COMMAND
-test -n "$XDG_COMMAND" || XDG_COMMAND="$(tomcat tools.xdg "$CONFIG")"
-! command -v handlr >/dev/null 2>&1 && ! command -v xdg-open >/dev/null 2>&1 \
-    && XDG_COMMAND=false \
-    || true
+done
 
 # check if we have a BROWSER
-test -n "$BROWSER" || BROWSER="$(tomcat tools.browser "$CONFIG")"
-if ! test -n "$BROWSER"; then
-  printf "\
-%s: \$BROWSER not filled.
-  Please place the path to your preferred browser's executable in
-  $XDG_CONFIG_HOME/xdg-sanity.toml
-" "$argv0" 1>&2
+if test -z "$BROWSER"; then
+  printf "%s: \$BROWSER not filled.\n" "$argv0" 1>&2
   exit 71 # sysexits(3) EX_OSERR
 fi
 
@@ -51,12 +49,12 @@ while test -n "$1"; do
   # use curl(1) to write out the request header's content_type,
   # strip everything after the first semicolon,
   # chop off any weird whitespace remnants
-  MIME="$(curl -Ls -o /dev/null -w '%{content_type}' "$1" | sed 's/\;.*//' |\
-    xargs echo)"
+  MIME="$(curl -Ls -o /dev/null -w '%{content_type}' "$1" | sed 's/\;.*//' \
+    | xargs echo)"
 
   # get the pattern for the extensions to MATCH
-  MATCH="$(printf "%s\n" "$URL" | sed -ne 's/^h.\+\/\///p' |\
-    sed -e 's/\/.*\+//g')"
+  MATCH="$(printf "%s\n" "$URL" | sed -ne 's/^h.\+\/\///p' \
+    | sed -e 's/\/.*\+//g')"
   
   # run through MIME extensions
   for file in \
@@ -70,7 +68,7 @@ while test -n "$1"; do
         if [ "$MATCH" = "$(tomcat replace.urls["$i"] "$file")" ]; then
           MIME="$(tomcat with.mime "$file")"
         fi
-        i="$(dc -e "$i 1 - p")"
+        i="$(printf "%s-1\n" "$i" | bc)"
       done
     fi
   done
@@ -87,7 +85,7 @@ while test -n "$1"; do
         if [ "$MATCH" = "$(tomcat replace.urls["$i"] "$file")" ]; then
           URL="$(tomcat with.url "$file")"
         fi
-        i="$(dc -e "$i 1 - p")"
+        i="$(printf "%s-1\n" "$i" | bc)"
       done
     fi
   done
@@ -96,17 +94,7 @@ while test -n "$1"; do
   if [ "$MIME" = "text/html" ]; then
     "$BROWSER" "$URL"
   else
-    case "$(command -v $XDG_COMMAND)" in
-      */handlr )
     handlr launch "$MIME" -- "$URL"
-        ;;
-      */xdg-open )
-        "$(xdg-mime query default "$MIME")" "$URL"
-        ;;
-      false )
-        exit 69 # sysexits(3) EX_UNAVAILABLE
-        ;;
-    esac
   fi
   shift
 done