1 files changed, 31 insertions, 0 deletions
diff --git a/nextbin b/nextbin
new file mode 100755
index 0000000..2e1d9dd
--- /dev/null
+++ b/nextbin
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+orig_exe=$(realpath -s "$1")
+exe_name=${orig_exe##*/}
+case "$orig_exe" in
+    */*) ;;
+    *)
+        printf 'error: cannot find next executable: argv[0] is %s, missing /\n' "$orig_exe"
+        exit 1
+esac
+paths=
+passed_paths=
+set -f
+_IFS=$IFS
+IFS=:
+for path in $PATH; do
+    file=$path/$exe_name
+    if [ "$file" = "$orig_exe" ]; then
+        if [ -n "$passed_paths" ] && [ -n "$paths" ]; then
+            printf 'error: ambiguous next executable for %s past %s, due to multiple non-consecutive instances of %s in PATH' "$exe_name" "$orig_exe" "$(dirname "$orig_exe")"
+            exit 1
+        fi
+        passed_paths=${paths+$paths:}
+        paths=
+    else
+        paths="${paths+$paths:}$path"
+    fi
+done
+IFS=$_IFS
+PATH="$passed_paths$paths" exec "$exe_name"
+exit 1