Race condition bug in CUE.

bug_tool.cue

package maklare

import "tool/file"
import "tool/cli"
import ppath "path"
import "list"

command: process: {
    inputs: file.Glob & {
        glob: "input/*.json"
    }
    outputs: file.Glob & {
        glob: "output/*.json"
    }
    for _, filepath in inputs.files {
        (filepath): {
            metadata: {
                _base: ppath.Base(filepath)
                _output: ppath.Join(["output", _base], ppath.Unix)
                _already_processed: list.Contains(outputs.files, metadata._output)
            }
            if metadata._already_processed == false {
                print_what_to_execute: cli.Print & {
                    text: "Processing: input=\(filepath) output=\(metadata._output)"
                }
            }
            if metadata._already_processed == true {
                print_already_processed: cli.Print & {
                    text: "\(filepath) already processed. Skipping."
                }
            }
        }
    }
}

command: testdata: {
    mkdirInputs: file.Mkdir & {
        path: "input"
    }
    mkdirOutputs: file.Mkdir & {
        path: "output"
    }
    for _, integer in list.Range(1, 1000, 1) {
        "createInput\(integer)": file.Create & {
            filename: "input/\(integer).json"
            contents: "{}"
            $after: mkdirInputs
        }
        "createOutput\(integer)": file.Create & {
            filename: "output/\(integer).json"
            contents: "{}"
            $after: mkdirOutputs
        }
    }
}