Add strict bash settings.

LICENSE

@@ -0,0 +1,17 @@
+Copyright (C) 2025 Nicolás A. Ortega Froysa <nicolas@ortegas.org>
+
+This software is provided 'as-is', without any express or implied
+warranty.  In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would be
+   appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.

README.md

@@ -0,0 +1,8 @@
+# Invidious/YouTube URL Conversion
+
+Tools to easily convert YouTube and Invidious links between one another.
+
+## License
+
+This project is distributed under the terms & conditions of the [Zlib
+license](LICENSE).

invid-conv

@@ -1,7 +1,41 @@
 #!/bin/bash
 
-YT_URL=$1
-INVID_BASE="https://yewtu.be"
+set -euo pipefail
+
+# Copyright (C) 2025 Nicolás Ortega Froysa <nicolas@ortegas.org> All rights reserved.
+# Author: Nicolás Ortega Froysa <nicolas@ortegas.org>
+#
+# This software is provided 'as-is', without any express or implied
+# warranty. In no event will the authors be held liable for any damages
+# arising from the use of this software.
+#
+# Permission is granted to anyone to use this software for any purpose,
+# including commercial applications, and to alter it and redistribute it
+# freely, subject to the following restrictions:
+#
+# 1. The origin of this software must not be misrepresented; you must not
+#    claim that you wrote the original software. If you use this software
+#    in a product, an acknowledgment in the product documentation would be
+#    appreciated but is not required.
+#
+# 2. Altered source versions must be plainly marked as such, and must not be
+#    misrepresented as being the original software.
+#
+# 3. This notice may not be removed or altered from any source
+#    distribution.
+
+YT_URL="$1"
+INVID_BASE="${INVID_BASE:-https://inv.nadeko.net}"
+
+if [ $# -ne 1 ]
+then
+	>&2 echo "Usage: $0 <url>"
+	exit 1
+elif [ "$1" = "-h" ]
+then
+	echo "Usage: $0 <url>"
+	exit 0
+fi
 
 if [[ $YT_URL == *"youtu.be"* ]]
 then
@@ -11,4 +45,4 @@ then
 	INVID_URL="${INVID_BASE}/${YT_URL##*/}"
 fi
 
-echo $INVID_URL
+echo "$INVID_URL"

yt-conv

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+set -euo pipefail
+
+# Copyright (C) 2025 Nicolás Ortega Froysa <nicolas@ortegas.org> All rights reserved.
+# Author: Nicolás Ortega Froysa <nicolas@ortegas.org>
+#
+# This software is provided 'as-is', without any express or implied
+# warranty. In no event will the authors be held liable for any damages
+# arising from the use of this software.
+#
+# Permission is granted to anyone to use this software for any purpose,
+# including commercial applications, and to alter it and redistribute it
+# freely, subject to the following restrictions:
+#
+# 1. The origin of this software must not be misrepresented; you must not
+#    claim that you wrote the original software. If you use this software
+#    in a product, an acknowledgment in the product documentation would be
+#    appreciated but is not required.
+#
+# 2. Altered source versions must be plainly marked as such, and must not be
+#    misrepresented as being the original software.
+#
+# 3. This notice may not be removed or altered from any source
+#    distribution.
+
+if [ $# -ne 1 ]
+then
+	>&2 echo "Usage: $0 <url>"
+	exit 1
+elif [ "$1" = "-h" ]
+then
+	echo "Usage: $0 <url>"
+	exit 0
+fi
+
+URL="$1"
+YT_URL="${URL//https:\/\/*\//https:\/\/www.youtube.com\/}"
+echo "$YT_URL"