overleaf/services/clsi/app/coffee/TikzManager.coffee

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fs = require "fs"
Path = require "path"
ResourceWriter = require "./ResourceWriter"
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SafeReader = require "./SafeReader"
logger = require "logger-sharelatex"
# for \tikzexternalize to work the main file needs to match the
# jobname. Since we set the -jobname to output, we have to create a
# copy of the main file as 'output.tex'.
module.exports = TikzManager =
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checkMainFile: (compileDir, mainFile, resources, callback = (error, usesTikzExternalize) ->) ->
# if there's already an output.tex file, we don't want to touch it
for resource in resources
if resource.path is "output.tex"
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logger.log compileDir: compileDir, mainFile: mainFile, "output.tex already in resources"
return callback(null, false)
# if there's no output.tex, see if we are using tikz/pgf in the main file
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ResourceWriter.checkPath compileDir, mainFile, (error, path) ->
return callback(error) if error?
SafeReader.readFile path, 65536, "utf8", (error, content) ->
return callback(error) if error?
usesTikzExternalize = content?.indexOf("\\tikzexternalize") >= 0
logger.log compileDir: compileDir, mainFile: mainFile, usesTikzExternalize:usesTikzExternalize, "checked for tikzexternalize"
callback null, usesTikzExternalize
injectOutputFile: (compileDir, mainFile, callback = (error) ->) ->
ResourceWriter.checkPath compileDir, mainFile, (error, path) ->
return callback(error) if error?
fs.readFile path, "utf8", (error, content) ->
return callback(error) if error?
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logger.log compileDir: compileDir, mainFile: mainFile, "copied file to output.tex for tikz"
# use wx flag to ensure that output file does not already exist
fs.writeFile Path.join(compileDir, "output.tex"), content, {flag:'wx'}, callback