Minimal commit driven nushell benchmark tool

commit-bencher.nu

#!/usr/bin/env nu

def main [
  --depth=1: int # How many commits back to go
  script # The benchmark script you want to run
  ] {
  let start_commit = (git rev-parse --short HEAD)
  let start_branch = (git branch --show-current)
  mut commits = []
  for i in ..$depth {
    let current = (git rev-parse --short HEAD)
    if not ($current | path exists) {
      cargo build --release
      cp target/release/nu $current
    }
    $commits ++= $current

    git checkout HEAD~1
  }
  if ($start_branch | is-empty) {
    git checkout $start_commit
  } else {
    git switch $start_branch
  }

  print $commits

  # running in reverse so as to not bias through CPU thermals
  for commit in ($commits | reverse ) {
    print $"=== ($commit) ==="
    try { run-external $"./($commit)" $script }
  }
}