ln wrapper

README.md

@@ -10,6 +10,7 @@ While created for my own use, they are shared here in case others find them usef
 - **check**: Validates script dependencies and configuration
 - **e-ink**: Display handler for e-ink displays with image cycling support
 - **indeel**: File organization tool that watches a directory and sorts incoming files based on content hashes
+- **lnw**: `ln` wrapper that always creates a symbolic link, auto-detects which argument is the existing target, and converts paths to absolute
 - **mover**: Monitors a source directory and moves files with specified extensions to a destination directory
 - **pushover**: Sends push notifications via Pushover API
 - **stats**: HTTP server that provides system statistics (CPU, memory, disk usage, etc.) in JSON format

bin/lnw

@@ -0,0 +1,50 @@
+#!/bin/bash
+# ln? pfft
+# Ja het was waarschijnlijk minder moeite geweest om het te onthouden
+# dan om dit scriptje te schrijven.
+
+set -euo pipefail
+
+usage() {
+    echo "Ook altijd geen idee hoe ln ook alweer werkt? Geen zorgen."
+    echo "Doe: $0 <file> <link>" >&2
+    echo " of: $0 <link> <file>" >&2
+    exit 1
+}
+
+if [ $# -ne 2 ]; then
+    usage
+fi
+
+a="$1"
+b="$2"
+
+a_exists=0
+b_exists=0
+if [ -e "$a" ]; then a_exists=1; fi
+if [ -e "$b" ]; then b_exists=1; fi
+
+if [ "$a_exists" -eq 1 ] && [ "$b_exists" -eq 1 ]; then
+    # is één van de twee al een link? Dan is het goed.
+    if { [ -L "$a" ] && [ "$(readlink "$a")" = "$(realpath "$b")" ]; } || \
+       { [ -L "$b" ] && [ "$(readlink "$b")" = "$(realpath "$a")" ]; }; then
+        exit 0
+    fi
+    echo "[FOUT] deze bestaan al: $a, $b" >&2
+    exit 1
+# Geen van beide bestaat
+elif [ "$a_exists" -eq 0 ] && [ "$b_exists" -eq 0 ]; then
+    echo "[FOUT] allebei niet gevonden: $a, $b" >&2
+    exit 1
+elif [ "$a_exists" -eq 1 ]; then
+    target="$a"
+    link="$b"
+else
+    target="$b"
+    link="$a"
+fi
+
+target_abs="$(realpath "$target")"
+link_abs="$(realpath -m "$link")"
+
+ln -s "$target_abs" "$link_abs"