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@mortenpi mortenpi/sasscwatcher.jl

Last active May 30, 2019
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A short program to watch changes in Sass files and recompile them automatically
# Copyright 2019 Morten Piibeleht
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this
# software and associated documentation files (the "Software"), to deal in the Software
# without restriction, including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
# to whom the Software is furnished to do so, subject to the following conditions:
#
#The above copyright notice and this permission notice shall be included in all copies or
#substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
# PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
# FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
using FileWatching
function all_subdirectories(d)
vcat(d, mapreduce(vcat, walkdir(joinpath(@__DIR__, "scss"))) do (root, dirs, _)
[joinpath(root, d) for d in dirs]
end)
end
# Setup
const SASSBUILDER_RUNNING = Ref(false)
const SASSBUILDER_TASKS = Ref(Task[])
const SASSBUILDER_OUTDIR = Ref(@__DIR__)
const SASSBUILDER_LOADPATH = Ref(joinpath(@__DIR__, "scss"))
const SASSBUILDER_FILES = Ref(String[
joinpath(@__DIR__, "scss", "documenter.scss"),
joinpath(@__DIR__, "scss", "documenter-dark.scss"),
joinpath(@__DIR__, "scss", "documenter-rainbow.scss"),
])
const SASSBUILDER_WATCHING = Ref(all_subdirectories(joinpath(@__DIR__, "scss")))
# API
function compile(filepath)
loadpath = SASSBUILDER_LOADPATH[]
filename = basename(filepath)
ofile = replace(filename, r".scss$" => ".css")
opath = joinpath(SASSBUILDER_OUTDIR[], ofile)
cmd = `sassc -I $(loadpath) $(filepath) $(opath)`
io = IOBuffer()
if success(pipeline(cmd, stdout=io, stderr=io))
@info "Compilation of $(filename) successful"
return true
else
sassoutput = String(take!(io))
@warn """Compilation of $(filename) failed.
Command:
$(cmd)
With following stdout + stderr:
$(sassoutput)
"""
return false
end
end
compile_all() = all(map(compile, SASSBUILDER_FILES[]))
function watch_directory(dir)
@info "Registering watcher for: $(dir)"
while true
(f, reason) = watch_folder(dir, 2)
if reason.changed
@info "Change: $(f)" dir
if endswith(f, ".scss")
compile_all()
else
@info "Ignoring $(f) -- not Sass"
end
elseif reason.timedout && !SASSBUILDER_RUNNING[]
@info "Exiting watcher for $(dir)"
return
end
end
end
function watch_all()
for d in SASSBUILDER_WATCHING[]
t = @async watch_directory(d)
push!(SASSBUILDER_TASKS[], t)
end
end
# Run
compile_all() # to compile all Sass files by hand
# To automatically compile everything on every change:
SASSBUILDER_RUNNING[] = true; watch_all()
# To stop all the watchers:
SASSBUILDER_RUNNING[] = false
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