BuildCache = object
  cacheVersion*: string
  outputFile*: string
  compile*: seq[(string, string)]
  link*: seq[string]
  linkcmd*: string
  extraCmds*: seq[string]
  configFiles: seq[string]
  inputMode: ProjectInputMode
  currentDir: string
  cmdline: string
  depfiles: seq[(string, string)]
  nimexe: string

cacheVersion = "D20230310T000000"

proc buildInstructionsStatus(conf: ConfigRef; jsonFile: AbsoluteFile): bool {.
    ...raises: [OSError, Exception, IOError, ValueError],
    tags: [ReadDirEffect, ReadIOEffect, WriteIOEffect].}

proc getBuildInstructionsFile(conf: ConfigRef): AbsoluteFile {.
    ...raises: [OSError], tags: [ReadEnvEffect, ReadIOEffect].}

proc writeBuildInstructions(conf: ConfigRef; bcache: sink BuildCache) {.
    ...raises: [OSError, IOError],
    tags: [ReadDirEffect, ReadIOEffect, ReadEnvEffect, WriteIOEffect].}