@dashkite/brick v0.2.0
Brick
Functions for reading, writing, and processing files, also known as asset pipelines.
import * as b from "@dashkite/brick"
do b.start [
b.glob [ "{src,test}/**/*.coffee" ], "."
b.read
b.tr ({path}, code) ->
coffee.compile code,
bare: true
inlineMap: true
filename: path
transpile:
presets: [[
"@babel/preset-env"
targets: node: "current"
]]
b.extension ".js"
b.write "build"
]
Use with Genie to run build functions using a task runner command-line interface.
API
Brick’s composition is based on the use of reactors, also known as asynchronous iterators. The start
function takes a list of functions that, together, yield a reactor, and waits on each value in turn. What this means is that we never iterate through a list of files more than once within a given function, even though it may appear otherwise. For all intents and purposes, you can imagine the reactors, like read
and write
as simply operating on a single file.
Start
start steps
GIven a list of (possibly asynchronous) functions, composes them and returns an asynchronous function.
glob patterns, directory
Given a list of glob patterns and a base directory, returns a reactor that produces paths that match the patterns.
Reactors
Each of the following functions technically takes a reactor as an argument, but we’ve omitted that, since they’re intended to be composed together, in which case, the reactor argument is passed via composition.
read
Reads each file. Typically used after glob
.
tr processor
Given a processor function that takes a path specification and text, invokes the processor for each file. Typically used after read
to compile or translate a file.
extension text
Sets the extension to be used by write
.
write directory
Given a directory, writes each file out based on the relative path.
copy directory
May be used in place of read
and write
when you simply want to copy a file from one directory to another using a stream.
Convenience Functions
These functions are intended to be used by themeslves and are included for convenience.
watch path, handler
Watch a directory or file and call a handler in response to changes.
server directory, options
Starts a static Web Server serving files from the given directory. Options:
fallback
: Specify a relative path to return when the request would otherwise return404 Not Found
.
exec command, arguments
Spawn a child process to run the given command, with the given arguments.
node script, arguments
Spawn a child process to run a given Node script, with the given arguments.