Added autocompletion and a simple lfcd script for nushell. (#1341)

* Added autocompletion and a simple lfcd script for nushell.

* nu-lfcd script & small style improvements. Moved the autocompletion to a seperate file.

* Update lfcd.nu to print to stderr instead of stdout

* Fixed the comments inside lf.nu

etc/lf.nu

@@ -0,0 +1,29 @@
+# Autocompletion for nushell.
+# 
+# Documentation: https://www.nushell.sh/book/externs.html
+
+# To enable autocompletion you may put this file into a directory:
+#
+# mkdir -p ~/.config/nushell/completions
+# ln -s "/path/to/lf.nu" ~/.config/nushell/completions
+#
+# Then you need to source this file in your nu config (Open the config with the
+# command 'config nu' inside the nushell) by adding:
+#
+# source ~/.config/nushell/completions/lf.nu
+
+export extern "lf" [
+ --command # command to execute on client initialization
+ --config: string # path to the config file (instead of the usual paths)
+ --cpuprofile: string # path to the file to write the CPU profile
+ --doc # show documentation
+ --last-dir-path: string # path to the file to write the last dir on exit (to use for cd)
+ --log: string # path to the log file to write messages
+ --memprofile: string # path to the file to write the memory profile
+ --remote: string # send remote command to server
+ --selection-path: string # path to the file to write selected files on open (to use as open file dialog)
+ --server # start server (automatic)
+ --single # start a client without server
+ --version # show version
+ --help # show help
+]

etc/lfcd.nu

@@ -0,0 +1,34 @@
+# Change working dir in shell to last dir in lf on exit (adapted from ranger).
+#
+# You need to add this to your Nushell Enviroment Config File
+# (Execute 'config env' in the nushell to open it).
+
+# You may also like to assign a key (Ctrl-O) to this command:
+# See the documentation: https://www.nushell.sh/book/line_editor.html#keybindings
+#
+# keybindings: [
+# {
+# name: lfcd
+# modifier: control
+# keycode: char_o
+# mode: [emacs, vi_normal, vi_insert]
+# event: {
+# send: executehostcommand
+# cmd: "lfcd"
+# }
+# }
+# ]
+
+def-env lfcd [] {
+ let tmp = (mktemp)
+ lf -last-dir-path $tmp
+ try {
+ let target_dir = (open --raw $tmp)
+ rm -f $tmp
+ try {
+ if ($target_dir != $env.PWD) { cd $target_dir }
+ } catch { |e| print -e $'lfcd: Can not change to ($target_dir): ($e | get debug)' }
+ } catch {
+ |e| print -e $'lfcd: Reading ($tmp) returned an error: ($e | get debug)'
+ }
+}