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- fs = require "fs"
- Path = require "path"
- spawn = require("child_process").spawn
- logger = require "logger-sharelatex"
- _ = require "underscore"
- module.exports = OutputFileOptimiser =
- optimiseFile: (src, dst, callback = (error) ->) ->
- # check output file (src) and see if we can optimise it, storing
- # the result in the build directory (dst)
- if src.match(/\/output\.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()
- callback = _.once(callback) # avoid double call back for error and close event
- proc.on "error", (err) ->
- logger.warn {err, args}, "qpdf failed"
- callback(null) # ignore the error
- proc.on "close", (code) ->
- if code != 0
- logger.warn {code, args}, "qpdf returned error"
- return callback(null) # ignore the error
- fs.rename tmpOutput, dst, (err) ->
- if err?
- logger.warn {tmpOutput, dst}, "failed to rename output of qpdf command"
- callback(null) # ignore the error
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