使用Swift编译Latex代码 [英] Compile Latex code using Swift

问题描述

我想使用Swift编译.tex文件.我有以下代码:

I wanted to compile a .tex file using Swift. I have the following code:

class FileManager {
    class func compileLatex(#file: String) {
        let task = NSTask()
        task.launchPath = "/usr/texbin/latexmk"
        task.currentDirectoryPath = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String).stringByAppendingString("/roster")
        task.arguments = ["-xelatex", file]
        task.launch()
    }
}

但是，在调用FileManager.compileLatex(file: "latex.tex")时，出现错误无法访问启动路径".因此，显然，启动路径是错误的，但是我不知道如何找出它的真正含义?我如何才能找到答案?感谢您的帮助

However, when calling FileManager.compileLatex(file: "latex.tex") I get the error 'launch path not accessible'. So apparently, the launch path is wrong, yet I don't know how to find out which it really is? How can I find out or is there a general path? Thanks for any help

更新代码并出现此错误:

updated code and getting this error:

Latexmk: This is Latexmk, John Collins, 10 January 2015, version: 4.42.
Latexmk: applying rule 'pdflatex'...
Rule 'pdflatex': Rules & subrules not known to be previously run:
   pdflatex
Rule 'pdflatex': The following rules & subrules became out-of-date:
      'pdflatex'
------------
Run number 1 of rule 'pdflatex'
------------
------------
Running 'xelatex  -recorder  "Praktikumsbericht.tex"'
------------
sh: xelatex: command not found
Latexmk: Errors, so I did not complete making targets
Collected error summary (may duplicate other messages):
  pdflatex: (Pdf)LaTeX failed to generate the expected log file 'Praktikumsbericht.log'
Latexmk: Did not finish processing file 'Praktikumsbericht.tex':
   (Pdf)LaTeX failed to generate the expected log file 'Praktikumsbericht.log'
Latexmk: Use the -f option to force complete processing,
 unless error was exceeding maximum runs of latex/pdflatex.

推荐答案

launchPath必须设置为可执行文件的路径， 例如

The launchPath must be set to the path of the executable, for example

task.launchPath = "/usr/texbin/latexmk"

currentDirectoryPath可以选择设置为执行 指定目录中的任务. 文档"目录 通常是这样确定的:

The currentDirectoryPath can optionally be set to execute the task in a specified directory. The "Documents" directory is usually determined like this:

task.currentDirectoryPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as NSString

最后，arguments是以下命令的命令行参数 可执行文件，例如

Finally, the arguments are the command line arguments for the executable, for example

task.arguments = ["-xelatex", file]

或者，您可以使用shell启动可执行文件， 像

Alternatively, you can start the executable using the shell, something like

task.launchPath = "/bin/sh"
task.currentDirectoryPath = ...
task.arguments = ["-c", "latexmk -xelatex \"\(file)\""]

优点是外壳程序使用PATH环境变量来 找到可执行文件.缺点之一是引用参数 正确比较困难.

The advantage is that the shell uses the PATH environment variable to locate the executable. One disadvantage is that quoting the arguments correctly is more difficult.

更新:似乎"/usr/texbin"必须在 LaTeX流程.可以按照以下步骤进行操作:

Update: It seems that "/usr/texbin" must be in the PATH for the LaTeX process. This can be done as follows:

// Get current environment:
var env = NSProcessInfo.processInfo().environment
// Get PATH:
var path = env["PATH"] as String
// Prepend "/usr/texbin":
path = "/usr/texbin:" + path
// Put back to environment:
env["PATH"] = path
// And use this as environment for the task:
task.environment = env

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