pixiv_down/update_git_version.d

#!/usr/bin/env dub --single
/+dub.sdl:
   name "update_git_version"
   targetType "executable"
+/

void replaceContents(string inputFileName, string outputFileName, string replaceMark, string content)
{
   import std.file: readText, write;
   import std.string: replace;

   auto inputContent = readText(inputFileName);
   auto outputContent = replace(inputContent, replaceMark, content);

   write(outputFileName, outputContent);
}

int main(string[] args)
{
   import std.process: execute;
   import std.stdio: stderr;
   import std.string: strip;

   if (args.length < 3) {
      stderr.writefln("error: expected two arguments: <input> <output>");
      return 1;
   }

   auto output = execute(["git", "rev-parse", "--short", "HEAD"]);
   if (output.status != 0) {
      replaceContents(args[1], args[2], "@VCS_TAG@", "release");
   }
   replaceContents(args[1], args[2], "@VCS_TAG@", strip(output.output));

   return 0;
}