dfm: add ranger style bulk rename

Also the ability to embed scripts within dfm.

3 files changed, 107 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
+
diff --git a/script/opener_ext b/script/opener_ext
new file mode 100755
index 0000000..ce1699a
--- /dev/null
+++ b/script/opener_ext
@@ -0,0 +1,27 @@
+#!/bin/sh -feu
+#
+# Example DFM_OPENER script using file extension.
+#
+
+case $1 in
+  *.mkv | *.webm | *.mp4 | *.avi)
+    exec mpv -- "$1"
+  ;;
+
+  *.opus | *.mp3 | *.wav | *.flac | *.ogg)
+    exec mus --no-shuffle -- "$1"
+  ;;
+
+  *.jpg | *.jpeg | *.gif | *.png | *.CR2)
+    exec mpv --pause -- "$1"
+  ;;
+
+  *.svg)
+    exec inkscape "$1"
+  ;; 
+
+  *?*)
+    exec "${EDITOR:-vim}" "$1"
+  ;;
+esac
+
diff --git a/script/opener_mime b/script/opener_mime
new file mode 100755
index 0000000..2f7bd52
--- /dev/null
+++ b/script/opener_mime
@@ -0,0 +1,33 @@
+#!/bin/sh -feu
+#
+# Example DFM_OPENER script using mimetype.
+#
+
+mime_type=$(file -bi "$1")
+
+case $mime_type in
+  audio/*)
+   exec mpv --no-video "$1"
+  ;;
+
+  video/*)
+    exec mpv "$1"
+  ;;
+
+  image/*)
+    exec gimp "$1"
+  ;;
+
+  text/html* | application/pdf*)
+    exec firefox "$1"
+  ;;
+
+  text/*)
+    exec "${EDITOR:=vi}" "$1"
+  ;;
+
+  *?*)
+    printf 'error: unhandled mime-type %s\n' "$mime_type" >&2
+  ;;
+esac
+