changes

plow/default.nix

@@ -0,0 +1,6 @@
+{writeShellApplication}:
+writeShellApplication {
+  name = "plow";
+
+  text = builtins.readFile ./plow.bash;
+}

plow/plow.bash

@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+shopt -s nullglob globstar
+
+opts=$(getopt --options f:t:Fivm: --longoptions=from:,to:,force,interactive,verbose,directory-mode: --name "$0" -- "$@")
+
+eval set -- "$opts"
+
+from=${PLOW_FROM:-$PWD}
+to=${PLOW_TO:-$HOME}
+lnflags=()
+mkdirflags=()
+while true; do
+  case "$1" in
+  -f | --from)
+    from=$2
+    shift 2
+    ;;
+  -t | --to)
+    to=$2
+    shift 2
+    ;;
+  -F | --force)
+    lnflags+=(--force)
+    shift
+    ;;
+  -i | --interactive)
+    lnflags+=(--interactive)
+    shift
+    ;;
+  -v | --verbose)
+    lnflags+=(--verbose)
+    mkdirflags+=(--verbose)
+    shift
+    ;;
+  -m | --directory-mode)
+    mkdirflags+=(--mode "$2")
+    shift 2
+    ;;
+  --)
+    shift
+    break
+    ;;
+  esac
+done
+
+from=$(realpath --strip -- "$from")
+to=$(realpath --strip -- "$to")
+
+if (( $# > 0 )); then
+  choices=("$@")
+else
+  choices=()
+  for dir in "$from"/*/; do
+    choices+=("$(basename -- "$dir")")
+  done
+fi
+
+shopt -s dotglob
+
+for choice in "${choices[@]}"; do
+  prefix=$from/$choice
+  for target in "$prefix"/**/*; do
+    if [[ -f "$target" ]]; then
+      link=$to${target#"$prefix"}
+      mkdir --parents "${mkdirflags[@]}" -- "$(dirname -- "$link")"
+      ln --symbolic "${lnflags[@]}" -- "$target" "$link"
+    fi
+  done
+done