ability to add custom work dir

src/etherpad2latex.nim

@@ -13,6 +13,7 @@ when isMainModule:
     help("Compiles etherpad pads to pdf")
     option("-p", "--port", help="Port for the server", default="8080")
     option("-a", "--etherpad-address", help="The address of the etherpad", default="http://localhost:9001")
+    option("-d", "--working-directory", help="The directory to use for saving and compiling", default=".")
 
   let opts = p.parse()
 
@@ -21,13 +22,17 @@ when isMainModule:
       let
         pad = @"pad"
         etherpadUrl = opts.etherpadAddress
+        workingDir = opts.workingDirectory
         content = getContent(pad, etherpadUrl)
 
-      writeFile(pad & ".tex", content)
+        texFile = workingDir / pad & ".tex"
+        pdfFile = workingDir / pad & ".pdf"
 
-      let (output, exitCode) = execCmdEx(quoteShellCommand(["pdflatex", "-halt-on-error", pad & ".tex"]))
+      writeFile(texFile, content)
+  
+      let (output, exitCode) = execCmdEx(quoteShellCommand(["pdflatex", "-halt-on-error", texFile]))
       if exitCode == 0:
-        resp(Http200, readFile(pad & ".pdf"), contentType = "application/pdf")
+        resp(Http200, readFile(pdfFile), contentType = "application/pdf")
       else:
         resp output