dfm: add ranger style bulk rename

Also the ability to embed scripts within dfm.

1 files changed, 47 insertions, 0 deletions

diff --git a/script/bulk-rename b/script/bulk-rename
new file mode 100755
index 0000000..3bd6c85
--- /dev/null
+++ b/script/bulk-rename
@@ -0,0 +1,47 @@
+#!/bin/sh -eu
+#
+# Interactive bulk file rename using $EDITOR.
+#
+# Copyright (c) 2026 Dylan Araps
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
+
+case $# in 0) exit; esac
+f=${TMPDIR:=/tmp}/.dfm-brn-$$-$#
+e() { rm -f "$f" || :; exit "$1"; }
+(
+  printf '%s\n' "$@" > "$f" &&
+  "${EDITOR:=vi}" "$f" &&
+  exec 3<"$f" &&
+  for _ do
+    IFS= read -r l <&3
+    set -- "$@" "mv -f -- '$1' '${l:?line mismatch in rename file}'"
+    shift
+  done && {
+  read -r l <&3 && {
+    echo "$0: 39: line mismatch in rename file" >&2
+    return 1
+  }
+  printf '%s\n' '# This file will be executed when the editor is closed.' \
+                '# Clear the file to abort.' "$@"
+  } > "$f" &&
+  "$EDITOR" "$f" && . "$f" && e 0
+) || e 1
+