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159 lines
8.8 KiB
Markdown
159 lines
8.8 KiB
Markdown
<h1 align="center">nnn plugins</h1>
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<p align="center"><img src="https://i.imgur.com/SpT0L2W.png" /></p>
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<p align="center"><i>read ebooks with plugin gutenread (Android)</i></p>
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<p align="center"><img src="https://i.imgur.com/14iPDIq.png" /></p>
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<p align="center"><i>image preview with plugin imgthumb</i></p>
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## Introduction
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Plugins extend the capabilities of `nnn`. They are _executable_ scripts (or binaries) which `nnn` can communicate with and trigger. This mechanism fits perfectly with the fundamental design to keep the core file manager lean and fast, by delegating repetitive (but not necessarily file manager-specific) tasks to the plugins.
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## List of plugins
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| Plugin (a-z) | Description | Lang | Deps |
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| --- | --- | --- | --- |
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| boom | Play random music from dir | sh | [moc](http://moc.daper.net/) |
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| dups | List non-empty duplicate files in current dir | sh | find, md5sum,<br>sort uniq xargs |
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| chksum | Create and verify checksums | sh | md5sum,<br>sha256sum |
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| diffs | Diff for selection (limited to 2 for directories) | sh | vimdiff |
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| dragdrop | Drag/drop files from/into nnn | sh | [dragon](https://github.com/mwh/dragon) |
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| exetoggle | Toggle executable status of hovered file | sh | chmod |
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| fzcd | Change to the directory of a fuzzy-selected file/dir | sh | fzf/fzy<br>fd/fdfind/find |
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| fzhist | Fuzzy-select a cmd from history, edit in `$EDITOR` and run | sh | fzf/fzy |
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| fzopen | Fuzzy find a file in dir subtree and edit or open | sh | fzf/fzy, xdg-open |
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| getplugs | Update plugins | sh | curl |
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| gutenread | Browse, download, read from Project Gutenberg | sh | curl, unzip, w3m<br>[epr](https://github.com/wustho/epr) (optional) |
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| hexview | View a file in hex in `$PAGER` | sh | xxd |
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| imgresize | Resize images in dir to screen resolution | sh | [imgp](https://github.com/jarun/imgp) |
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| imgsxiv | Browse images, set wallpaper, copy path ([config](https://wiki.archlinux.org/index.php/Sxiv#Assigning_keyboard_shortcuts)), [rename](https://github.com/jarun/nnn/wiki/Basic-use-cases#browse-rename-images)| sh | sxiv |
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| imgthumb | View thumbnail of an image or dir of images | sh | [lsix](https://github.com/hackerb9/lsix) |
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| imgur | Upload an image to imgur (from [imgur-screenshot](https://github.com/jomo/imgur-screenshot)) | bash | - |
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| imgviu | View an image or images in dir in `$PAGER` | sh | [viu](https://github.com/atanunq/viu), less |
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| ipinfo | Fetch external IP address and whois information | sh | curl, whois |
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| kdeconnect | Send selected files to an Android device | sh | kdeconnect-cli |
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| launch | GUI application launcher | sh | fzf/fzy |
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| mediainf | Show media information | sh | mediainfo |
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| moclyrics | Show lyrics of the track playing in moc | sh | [ddgr](https://github.com/jarun/ddgr), [moc](http://moc.daper.net/) |
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| mocplay | Append (and/or play) selection/dir/file in moc | sh | [moc](http://moc.daper.net/) |
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| nmount | Toggle mount status of a device as normal user | sh | pmount, udisks2 |
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| notes | Open a quick notes file/dir in `$EDITOR` | sh | - |
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| nuke | Sample file opener (CLI-only by default) | sh | various |
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| oldbigfile | List large files by access time | sh | find, sort |
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| organize | Auto-organize files in directories by file type | sh | file |
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| pastebin | Paste contents of a text a file ix.io | sh | - |
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| pdfread | Read a PDF or text file aloud | sh | pdftotext, mpv,<br>pico2wave |
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| pdfview | View PDF file in `$PAGER` | sh | pdftotext/<br>mupdf-tools |
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| picker | Pick files and list one per line (to pipe) | sh | nnn |
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| pskill | Fuzzy list by name and kill process or zombie | sh | fzf/fzy, ps,<br>sudo/doas |
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| renamer | Batch rename selection or files in dir | sh | [qmv](https://www.nongnu.org/renameutils/)/[vidir](https://joeyh.name/code/moreutils/) |
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| ringtone | Create a variable bitrate mp3 ringtone from file | sh | date, ffmpeg |
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| splitjoin | Split file or join selection | sh | split, cat |
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| suedit | Edit file using superuser permissions | sh | sudoedit/sudo/doas |
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| transfer | Upload file to transfer.sh | sh | curl |
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| treeview | Informative tree output in `$EDITOR` | sh | tree |
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| uidgid | List user and group of all files in dir | sh | ls, less |
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| upgrade | Upgrade nnn manually on Debian 9 Stretch | sh | curl |
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| vidthumb | Show video thumbnails in terminal | sh | [ffmpegthumbnailer](https://github.com/dirkvdb/ffmpegthumbnailer),<br>[lsix](https://github.com/hackerb9/lsix) |
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| wall | Set wallpaper or change colorscheme | sh | nitrogen/pywal |
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## Installing plugins
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The following command installs all plugins:
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curl -Ls https://raw.githubusercontent.com/jarun/nnn/master/plugins/getplugs | sh
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Plugins are installed to `${XDG_CONFIG_HOME:-$HOME/.config}/nnn/plugins`. You can run the `getplugs` plugin later to update the plugins. It backs up earlier plugins.
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## Executing plugins
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**Method 1:** Directly with <kbd>:key</kbd>:
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export NNN_PLUG='o:fzopen;p:mocplay;d:diffs;m:nmount;n:notes;v:imgviu;t:imgthumb'
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Now plugin `fzopen` can be run with the keybind <kbd>:o</kbd>, `mocplay` can be run with <kbd>:p</kbd> and so on... The key vs. plugin pairs are shown in the help and config screen.
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**Method 2:** Use the _pick plugin_ shortcut to visit the plugin directory and execute a plugin. Repeating the same shortcut cancels the operation and puts you back in the original directory.
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## Running commands as plugin
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To assign keys to arbitrary non-background cli commands (non-shell-interpreted) and invoke like plugins, add `_` (underscore) before the command. For example:
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export NNN_PLUG='x:_chmod +x $nnn;g:_git log;s:_smplayer $nnn;o:fzopen'
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Now <kbd>:x</kbd> can be used to make a file executable, <kbd>:g</kbd> can be used to the git log of a git project directory, <kbd>:s</kbd> can be used to preview a partially downloaded media file.
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Notes:
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1. Use single quotes for `$NNN_PLUG` so `$nnn` is not interpreted
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2. `$nnn` should be the last argument (IF you want to pass the hovered file name)
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3. (_Again_) add `_` before the command
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## Access level of plugins
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When `nnn` executes a plugin, it does the following:
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- Change to the directory where the plugin is to be run (`$PWD` pointing to the active directory)
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- Passes two arguments to the script:
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1. The hovered file's name.
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2. The working directory (might differ from `$PWD` in case of symlinked paths; non-canonical). Note that the second argument is not passed in case of commands starting with `_`.
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- Sets the environment variable `NNN_PIPE` used to control `nnn` active directory.
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Plugins can also access the current selections by reading the `.selections` file in the config directory (See the `diffs` plugin for example).
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## Create your own plugins
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Plugins are scripts that can be written in any scripting language. However, POSIX-compliant shell scripts runnable in `sh` are preferred.
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Once it's ready, drop the plugin in `${XDG_CONFIG_HOME:-$HOME/.config}/nnn/plugins` and make it executable. Optionally add a custom keybind in `$NNN_PLUG` if you intend to use the plugin frequently.
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#### Controlling `nnn`'s active directory
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`nnn` provides a mechanism for plugins to control its active directory.
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The way to do so is by writing to the pipe pointed by the environment variable `NNN_PIPE`.
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The plugin should write a single string in the format `<number><path>` without a newline at the end. For example, `1/etc`.
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The number indicates the context to change the active directory of (0 is used to indicate the current context).
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For convenience, we provided a helper script named `.nnn-plugin-helper` and a function named `nnn_cd` to ease this process. `nnn_cd` receives the path to change to as the first argument, and the context as an optional second argument.
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If a context is not provided, it is asked for explicitly.
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Usage examples can be found in the Examples section below.
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#### Examples
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There are many plugins provided by `nnn` which can be used as examples. Here are a few simple selected examples.
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- Show the git log of changes to the particular file along with the code for a quick and easy review.
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```sh
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#!/usr/bin/env sh
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git log -p -- "$1"
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```
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- Change to directory in clipboard using helper script
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```sh
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#!/usr/bin/env sh
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. $(dirname $0)/.nnn-plugin-helper
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nnn_cd "$(xsel -ob)"
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```
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- Change direcory to the location of a link using helper script with specific context (current)
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```sh
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#!/usr/bin/env sh
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. $(dirname $0)/.nnn-plugin-helper
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nnn_cd "$(dirname $(readlink -fn $1))" 0
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```
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- Change to arbitrary directory without helper script
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```sh
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#!/usr/bin/env sh
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printf "cd to: "
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read -r dir
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printf "%s" "0$dir" > "$NNN_PIPE"
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```
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## Contributing plugins
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Add informative sections like _Description_, _Notes_, _Dependencies_, _Shell_, _Author_ etc. in the plugin as applicable. Add an entry in the table above. Please keep non-portable commands (like `notify-send`) commented so users from any other OS/DE aren't surprised.
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The plugins should be executable.
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