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187 lines
9.8 KiB
Markdown
187 lines
9.8 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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## Installing plugins
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The following command installs or updates (after backup) 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`.
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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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| autojump | Navigate to dir/path (**autojump stores navigation patterns**) | sh | autojump |
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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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| 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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| 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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| imgview | 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/[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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| 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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| pdfread | Read a PDF or text file aloud | sh | pdftotext, mpv,<br>pico2wave |
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| pdfview | View PDF file in `$PAGER` | sh | pdftotext/<br>mupdf-tools |
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| picker | Pick files and list one per line (to pipe) | sh | nnn |
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| pskill | Fuzzy list by name and kill process or zombie | sh | fzf/fzy, ps,<br>sudo/doas |
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| renamer | Batch rename selection or files in dir | sh | [qmv](https://www.nongnu.org/renameutils/)/[vidir](https://joeyh.name/code/moreutils/) |
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| ringtone | Create a variable bitrate mp3 ringtone from file | sh | date, ffmpeg |
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| splitjoin | Split file or join selection | sh | split, cat |
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| suedit | Edit file using superuser permissions | sh | sudoedit/sudo/doas |
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| treeview | Informative tree output in `$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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| upload | Paste text to ix.io, upload binary to file.io | sh | curl, jq, tr |
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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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## Invoking a plugin
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Use the plugin shortcut (<kbd>;key</kbd> or <kbd>;key</kbd>) to list the defined plugin keys and press the required key. E.g., with the below config:
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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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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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A maximum of 15 keys can be defined. To select and invoke a plugin from the plugin directory, press <kbd>Enter</kbd> (to _enter_ the plugin dir) after the plugin shortcut.
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#### Skip directory refresh after running a plugin
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`nnn` refreshes the directory after running a plugin to reflect any changes by the plugin. To disable this (say while running the `mediainfo` plugin on some filtered files), add a `-` before the plugin name:
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export NNN_PLUG='m:-mediainfo'
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Now `nnn` will not refresh the directory after running the `mediainfo` plugin.
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## Running commands as plugin
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To assign keys to arbitrary non-background, non-shell-interpreted cli commands and invoke like plugins, add `_` (underscore) before the command.
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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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#### Skip user confirmation after command execution
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`nnn` waits for user confirmation (the prompt `Press Enter to continue`) after it executes a command as plugin (unlike plugins which can add a `read` to wait). To skip this, add a `*` after the command. For example:
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export NNN_PLUG='s:_smplayer $nnn*;n:-_vim /home/vaio/Dropbox/Public/synced_note*'
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Now there will be no prompt after <kbd>;s</kbd> and <kbd>;n</kbd>.
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Notes:
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1. Use single quotes for `$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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4. To disable directory refresh after running a _command as plugin_, prefix the command with `-_`
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#### Some useful key-command examples
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| Key:Command | Description |
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|---|---|
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| `k:-_fuser -kiv $nnn*` | Interactively kill process(es) using hovered file |
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| `l:_git log` | Show git log |
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| `n:-_vi /home/user/Dropbox/dir/note*` | Take quick notes in a synced file/dir of notes |
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| `s:_smplayer -minigui $nnn*` | Play hovered media file, even unfinished download |
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| `x:_chmod +x $nnn` | Make the hovered file executable |
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| `y:-_sync*` | Flush cached writes |
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## Access level of plugins
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When `nnn` executes a plugin, it does the following:
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- Changes to the directory where the plugin is to be run (`$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 `$PWD` in case of symlinked paths; non-canonical).
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- Sets the environment variable `NNN_PIPE` used to control `nnn` active directory.
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Plugins can also read the `.selection` file in the config directory.
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## Create your own plugins
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Plugins can be written in any scripting language. However, POSIX-compliant shell scripts runnable in `sh` are preferred.
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Drop the plugin in `${XDG_CONFIG_HOME:-$HOME/.config}/nnn/plugins` and make it executable. Optionally add a hotkey in `$NNN_PLUG` for frequent usage.
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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 directory 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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1. Add informative sections like _Description_, _Notes_, _Dependencies_, _Shell_, _Author_ etc. in the plugin.
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2. Add an entry in the table above.
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3. Keep non-portable commands (like `notify-send`) commented so users from any other OS/DE aren't surprised.
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4. The plugin file should be executable.
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