:tangerine: Tangerine :tangerine:

About • Installation • Setup • Commands • API • Development

About

Tangerine provides a painless way to add fennel to your config.

Features

• :fire: BLAZING fast, compile times in milliseconds
• :ocean: 100% support for interactive evaluation
• :bamboo: Control over when and how to compile
• :ribbon: Natively loads nvim/init.fnl

Comparison to other plugins

HOTPOT :stew:

• Abstracts too much away from the user.
• Hooks onto lua package searchers to compile [harder to debug].

ANISEED :herb:

• Excessively feature rich for use in dotfiles.
• Blindly compiles all files that it founds, resulting in slow load times.

Installation

1. Create file plugin/0-tangerine.lua to bootstrap tangerine:

[!IMPORTANT] If you are using lazy.nvim then you should create init.lua instead of plugin/0-tangerine.lua.

Refer to #20 for more information.

-- ~/.config/nvim/plugin/0-tangerine.lua or ~/.config/nvim/init.lua

-- pick your plugin manager
local pack = "tangerine" or "packer" or "paq" or "lazy"

local function bootstrap(url, ref)
    local name = url:gsub(".*/", "")
    local path

    if pack == "lazy" then
        path = vim.fn.stdpath("data") .. "/lazy/" .. name
        vim.opt.rtp:prepend(path)
    else
        path = vim.fn.stdpath("data") .. "/site/pack/".. pack .. "/start/" .. name
    end

    if vim.fn.isdirectory(path) == 0 then
        print(name .. ": installing in data dir...")

        vim.fn.system {"git", "clone", url, path}
        if ref then
            vim.fn.system {"git", "-C", path, "checkout", ref}
        end

        vim.cmd "redraw"
        print(name .. ": finished installing")
    end
end

-- for stable version [recommended]
bootstrap("https://github.com/udayvir-singh/tangerine.nvim", "v2.8")

-- for git head
bootstrap("https://github.com/udayvir-singh/tangerine.nvim")

2. Call tangerine setup() function, see config for valid options:

-- ~/.config/nvim/plugin/0-tangerine.lua

require "tangerine".setup {}

3. Invoke :FnlCompile manually or add hooks in setup.

:tanabata_tree: Now start writing your config in ~/.config/nvim/init.fnl.

:hibiscus: Optionally you can also install hibiscus for macros.

Package Management

Only use a package manager if you haven't used ref option in bootstrap function.

(local packer (require :packer))

(packer.startup (lambda [use]
  (use :udayvir-singh/tangerine.nvim)))

Using hibiscus macros:

(require-macros :hibiscus.packer)

(packer-setup {}) ; bootstraps packer

(packer
  (use! :udayvir-singh/tangerine.nvim))

(local paq (require :paq))

(paq [
  :udayvir-singh/tangerine.nvim
])

(local lazy (require :lazy))

(lazy.setup [
  :udayvir-singh/tangerine.nvim
])

Setup

Default config

Tangerine comes with sane defaults so that you can get going without having to add much to your config:

local nvim_dir = vim.fn.stdpath [[config]]

{
    vimrc   = nvim_dir .. "/init.fnl",
    source  = nvim_dir .. "/fnl",
    target  = nvim_dir .. "/lua",
    rtpdirs = {},

    custom = {
        -- list of custom [source target] chunks, for example:
        -- {"~/.config/awesome/fnl", "~/.config/awesome/lua"}
    },

    compiler = {
        float   = true,     -- show output in floating window
        clean   = true,     -- delete stale lua files
        force   = false,    -- disable diffing (not recommended)
        verbose = true,     -- enable messages showing compiled files

        globals = vim.tbl_keys(_G), -- list of alowed globals in fennel code

        -- wrapper function that provides access to underlying fennel compiler
        -- useful if you want to modify fennel API or want to provide your own fennel compiler
        adviser = function (fennel)
            -- for example, adding a custom macro path:
            -- fennel["macro-path"] = fennel["macro-path"] .. ";/custom/path/?.fnl"
            return fennel
        end,

        -- version of fennel to use, [ latest, 1-4-2, 1-4-1, 1-4-0, 1-3-1, 1-3-0, 1-2-1, 1-2-0, 1-1-0, 1-0-0, 0-10-0, 0-9-2 ]
        version = "latest",

        -- hooks for tangerine to compile on:
        -- "onsave" run every time you save fennel file in {source} dir
        -- "onload" run on VimEnter event
        -- "oninit" run before sourcing init.fnl [recommended than onload]
        hooks   = {}
    },

    eval = {
        float  = true,      -- show results in floating window
        luafmt = function() -- function that returns formatter with flags for peeked lua
            -- optionally install lua-format by running `$ luarocks install --local --server=https://luarocks.org/dev luaformatter`
            return {"~/.luarocks/bin/lua-format", "--column-limit", "80"}
        end,

        diagnostic = {
            virtual = true,  -- show errors in virtual text
            timeout = 10     -- how long should the error persist
        }
    },

    keymaps = {
        -- set them to <Nop> if you want to disable them
        eval_buffer = "gE",
        peek_buffer = "gL",
        goto_output = "gO",
        float = {
            next    = "<C-K>",
            prev    = "<C-J>",
            kill    = "<Esc>",
            close   = "<Enter>",
            resizef = "<C-W>=",
            resizeb = "<C-W>-"
        }
    },

    highlight = {
        float   = "Normal",
        success = "String",
        errors  = "DiagnosticError"
    },
}

Example Config

Here is config that I use in my dotfiles:

{
    -- save fnl output in a separate dir, it gets automatically added to package.path
    target = vim.fn.stdpath [[data]] .. "/tangerine",

    -- compile files in &rtp
    rtpdirs = {
        "plugin",
        "colors",
        "$HOME/mydir" -- absolute paths are also supported
    },

    compiler = {
        -- disable popup showing compiled files
        verbose = false,

        -- compile every time you change fennel files or on entering vim
        hooks = {"onsave", "oninit"}
    }
}

Commands

Compiling

:FnlCompileBuffer

Compiles current active fennel buffer.

:FnlCompile[!]

Diff compiles all indexed fennel files.

If bang! is present then forcefully compiles all source files.

:FnlClean[!]

Deletes stale or orphaned lua files in target dir.

If bang! is present then it deletes all compiled lua files.

Evaluation

:Fnl {expr}

Executes and Evalutate {expr} of fennel.

:Fnl (print "Hello World")
  -> Hello World

:Fnl (values some_var)
  -> :return [ 1 2 3 4 ]

:FnlFile {file}

Evaluates {file} of fennel and outputs the result.

:FnlFile path/source.fnl

:FnlFile % ;; not recommended

:[range]FnlBuffer

Evaluates all lines or [range] in current fennel buffer.

mapped to gE by default.

Peeking

:[range]FnlPeek

Peek lua output for [range] in current fennel buffer.

mapped to gL by default.

:FnlGotoOutput

Open lua output of current fennel buffer in a new buffer.

mapped to gO by default.

Window

:FnlWinNext [N]

Jump to [N]th next floating window created by tangerine..

mapped to CTRL-K in floats by default.

:FnlWinPrev [N]

Jump to [N]th previous floating window created by tangerine.

mapped to CTRL-J in floats by default.

:FnlWinResize [N]

Increase or Decrease floating window height by [N] factor.

mapped to CTRL-W = to increase and CTRL-W - decrease by default.

:FnlWinClose

Closes current floating window under cursor.

mapped to ENTER in floats by default.

:FnlWinKill

Closes all floating windows made by tangerine.

mapped to ESC in floats by default.

FAQ

Q: How to make tangerine compile automatically when you open vim

A: add hooks in config:

require [[tangerine]].setup {
    compiler = {
        -- if you want to compile before loading init.fnl (recommended)
        hooks = {"oninit"}

        -- if you want to compile after VimEnter event has fired
        hooks = {"onenter"}
    }
}

Q: How to tuck away compiled output in a separate directory

A: change target in config:

require [[tangerine]].setup {
    target = "/path/to/your/dir"
}

Q: How to make impatient work with tangerine

A: bootstrap and require impatient before calling tangerine:

bootstrap "https://github.com/lewis6991/impatient.nvim"

require [[impatient]]

require [[tangerine]].setup {...}

Q: How to use lua files interchangeably with fennel files

A: lua files can simply be stored in fnl dir:

fnl
├── options.lua
└── autocmd.fnl

; require both as normal modules in your config
(require :options)
(require :autocmd)

Q: How to fix errors in macros while migrating from hotpot

A: make sure that macro files are suffixed with -macros.fnl.

utils
├── neovim-macros.fnl
└── packer-macros.fnl

Refer to #2 and #30 for more information

Api

By default tangerine provides the following api:

:Fnl tangerine.api

-> :return {
     :compile {
       :all    (function 0)
       :buffer (function 1)
       :custom (function 2)
       :dir    (function 3)
       :file   (function 4)
       :rtp    (function 5)
       :string (function 6)
       :vimrc  (function 7)
     }
     :clean {
       :rtp      (function 8)
       :target   (function 9)
       :orphaned (function 10)
     }
     :eval {
       :buffer (function 11)
       :file   (function 12)
       :peek   (function 13)
       :string (function 14)
     }
     :win {
       :next    (function 15)
       :prev    (function 16)
       :close   (function 17)
       :killall (function 18)
       :resize  (function 19)
     }
     :goto_output (function 20)
     :serialize   (function 21)
   }

Compiler Api

compile-string

Compiles string {str} of fennel, returns string of lua.

Parameters:

{
  :filename <string>
  :globals  <list>
}

compile-file

Compiles fennel {source} and writes output to {target}.

Parameters:

{
  :filename <string>
  :globals  <list>
}

compile-dir

Diff compiles files in {source} dir and outputs to {target} dir.

Parameters:

{
  :force   <boolean>
  :float   <boolean>
  :verbose <boolean>
  :globals <list>
}

{opts.force} disables diffing if set to true

Example:

(tangerine.api.compile.dir
  :path/fnl
  :path/lua
  {:force false :float true :verbose true})

compile-buffer

Compiles the current active fennel buffer.

Parameters:

{
  :float    <boolean>
  :verbose  <boolean>
  :filename <string>
  :globals  <list>
}

compile-vimrc

Diff compiles config.vimrc to config.target dir.

Parameters:

{
  :force    <boolean>
  :float    <boolean>
  :verbose  <boolean>
  :filename <string>
  :globals  <list>
}

{opts.force} disables diffing if set to true

compile-rtp

Diff compiles fennel files in config.rtpdirs or {opts.rtpdirs}.

Parameters:

{
  :rtpdirs  <list>
  :force    <boolean>
  :float    <boolean>
  :verbose  <boolean>
  :globals  <list>
}

{opts.force} disables diffing if set to true

Example:

(tangerine.api.compile.rtp {
  :rtpdirs ["colors" "plugin" "$HOME/mydir"]
  :force   false
  :float   true
  :verbose true })

compile-custom

Diff compiles fennel files indexed in config.custom or {opts.custom}.

Parameters:

{
  :custom   <list>
  :force    <boolean>
  :float    <boolean>
  :verbose  <boolean>
  :globals  <list>
}

{opts.force} disables diffing if set to true

Example:

(tangerine.api.compile.custom {
  :custom  [["~/path/fnl" "~/path/lua"]]
  :force   false
  :float   true
  :verbose true })

compile-all

Diff compiles all indexed fennel files in config.

Parameters:

{
  :force    <boolean>
  :float    <boolean>
  :verbose  <boolean>
  :globals  <list>
  :rtpdirs  <list>
  :custom   <list>
}

{opts.force} disables diffing if set to true

Cleaning Api

Provides functions to clean stale / orphaned lua files in target dirs.

clean-target

Deletes orphaned? {target} after comparing against {source}.

Parameters:

{
  :force <boolean>
}

{opts.force} deletes {target} without comparing if set to true

clean-rtp

Deletes all orphaned lua files in config.rtpdirs or {opts.rtpdirs}.

Parameters:

{
  :force    <boolean>
  :float    <boolean>
  :verbose  <boolean>
  :rtpdirs  <list>
}

{opts.force} deletes all compiled files if set to true

clean-orphaned

Deletes all orphaned lua files indexed inside target dirs.

Parameters:

{
  :force    <boolean>
  :float    <boolean>
  :verbose  <boolean>
  :rtpdirs  <list>
}

{opts.force} deletes all compiled files if set to true

Evaluation Api

eval-string

Evaluates string {str} of fennel, pretty prints the output.

Parameters:

{
  :float    <boolean>
  :virtual  <boolean>
  :filename <string>
  :offset   <number> ;; line offset for errors
}

eval-file

Evaluates {path} of fennel, pretty prints the output.

Parameters:

{
  :float    <boolean>
  :virtual  <boolean>
  :filename <string>
}

eval-buffer

Evaluates lines {start} to {end} in current fennel buffer.

Parameters:

{
  :float    <boolean>
  :virtual  <boolean>
  :filename <string>
}

eval-peek

Peek lua output for lines {start} to {end} inside a scratch buffer.

Parameters:

{
  :float    <boolean>
  :virtual  <boolean>
  :filename <string>
}

Utils Api

goto_output

Open lua source of current fennel buffer in a new buffer.

serialize

Returns human-readable representation of {...}.

Example:

(tangerine.api.serialize example)
-> ":return [ 1 2 3 4 ]"

Windows Api

Provides functions to interact with floating windows created by tangerine.

win-next

Switch to next floating window by 1 or N {steps?}.

win-prev

Switch to previous floating window by 1 or N {steps?}.

win-resize

Changes height of current floating window by {factor} of N.

win-close

Closes current floating window, switching to nearest neighbor afterwards.

win-killall

Closes all floating windows created by tangerine.

Fennel Api

fennel-load

Provides access to fennel compiler used by tangerine.

{version} can be one of [ "latest" "1-4-2" "1-4-1" "1-4-0" "1-3-1" "1-3-0" "1-2-1" "1-2-0" "1-1-0" "1-0-0" "0-10-0" "0-9-2" ]

Development

Requirements

Program	Description
pandoc	generates vimdoc
lua	runs included fennel
make	runs build instructions
watchexec	build on changes (optional)
bash	runs shell scripts
utils	coreutils findutils gawk curl

only GNU utils work; 9base or busybox should not work

Building from source

git clone https://github.com/udayvir-singh/tangerine.nvim
cd tangerine.nvim

make <git-hooks>
make <target>

Refer to make help or below for information on targets.

Make Targets

Target	Description
fnl	compiles fennel files
deps	copy required deps in lua folder
vimdoc	runs panvimdoc to generate vimdocs
fnldoc	generates module level documentation
build	combines fnl deps vimdoc fnldoc
watch-build	watches source dir, runs :build on changes
clean	deletes build and install dir
install	install tangerine on this system
runner	compiles test runner library
test	runs unit tests, will erase nvim config

To build tangerine run:

$ make clean build
# or
$ make watch-build

To install tangerine run:

$ make install

Git Hooks

Target	Description
git-pull	safely fetches git repo, prevents conflicts with local changes
git-skip	makes git ignore changes to build files
git-unskip	reverts git-skip, makes build files trackable

Example workflow:

$ make git-skip # first thing that you should be running

# makes changes to tangerine
$ ...
$ make clean build

# commit changes
$ git commit -a -m "<msg>"

# cleanly fetch from origin
$ make git-pull

LOC Helpers

Helpers to generate detailed summary about lines of code in source files:

$ make loc-{language}

Supported Languages:

• fennel / test
• bash
• markdown
• makefile
• yaml

Examples:

$ make loc-fennel

$ make loc-bash

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