overleaf/services/clsi/app/coffee/OutputFileOptimiser.coffee

30 lines
835 B
CoffeeScript

fs = require "fs"
Path = require "path"
spawn = require("child_process").spawn
logger = require "logger-sharelatex"
module.exports = OutputFileOptimiser =
optimiseFile: (src, dst, callback = (error) ->) ->
if src.match(/\.pdf$/)
OutputFileOptimiser.optimisePDF src, dst, callback
else
callback (null)
optimisePDF: (src, dst, callback = (error) ->) ->
tmpOutput = dst + '.opt'
args = ["--linearize", src, tmpOutput]
logger.log args: args, "running qpdf command"
proc = spawn("qpdf", args)
stdout = ""
proc.stdout.on "data", (chunk) ->
stdout += chunk.toString()
proc.on "error", callback
proc.on "close", (code) ->
if code != 0
logger.warn {directory, code}, "qpdf returned error"
return callback null
fs.rename tmpOutput, dst, (err) ->
# could log an error here
callback null