main.nu

#!/usr/bin/env nu

let system = "x86_64-linux";
let forceCheck = false; # use for development to re-update all pkgs

$env.CACHIX_CACHE = (
  if "CACHIX_CACHE" in $env { $env.CACHIX_CACHE }
  else "nixpkgs-wayland"
)

$env.CACHIX_SIGNING_KEY = (
  if "CACHIX_SIGNING_KEY_NIXPKGS_WAYLAND" in $env { $env.CACHIX_SIGNING_KEY_NIXPKGS_WAYLAND }
  else "null"
)

def header [ color: string text: string spacer="▒": string ] {
  let text = $"($text) "
  let header = $"("" | fill -c $spacer -w 2) ($text | fill -c $spacer -w 100)"
  print -e $"(ansi $color)($header)(ansi reset)"
}

def getBadHash [ attrName: string ] {
  let val = ((do -i { ^nix build --no-link $attrName }| complete)
      | get stderr
      | split row "\n"
      | where ($it | str contains "got:")
      | str replace --regex '\s+got:(.*)(sha256-.*)' '$2'
      | get 0
  )
  $val
}

def replaceHash [ packageName: string, position: string, hashName: string, oldHash: string ] {
  let fakeSha256 = "0000000000000000000000000000000000000000000000000000";

  do -c { ^sd -s $"($oldHash)" $"($fakeSha256)" $"($position)" }
  let newHash = (getBadHash $".#($packageName)")
  do -c { ^sd -s $"($fakeSha256)" $"($newHash)" $"($position)" }

  print -e {packageName: $packageName, hashName: $hashName, oldHash: $oldHash, newHash: $newHash}
}

def updatePkgs [] {
  header "light_yellow_reverse" "update packages"
  let pkgs = (^nix eval --json $".#packages.($system)" --apply 'x: builtins.attrNames x' | str trim | from json)
  let pkgs = ($pkgs | where ($it != "default"))
  $pkgs | each { |packageName|
    let position = $"pkgs/($packageName)/metadata.nix"
    let verinfo = (^nix eval --json -f $position | str trim | from json)

    let skip = (("skip" in ($verinfo | transpose | get column0)) and $verinfo.skip)
    if $skip {
      print -e $"(ansi light_yellow) update ($packageName) - (ansi light_cyan_underline)skipped(ansi reset)"
    } else {
      # Try update rev
      let newrev = (
        if ("repo_git" in ($verinfo | transpose | get column0)) {
          (do -c {
            ^git ls-remote $verinfo.repo_git $"refs/heads/($verinfo.branch)"
          } | complete | get stdout | str trim | str replace --regex '(\s+)(.*)$' "")
        } else if ( "repo_hg" in ($verinfo | transpose | get column0) ) {
          (do -c {
            ^hg identify $verinfo.repo_hg -r $verinfo.branch
          } | complete | get stdout | str trim)
        } else {
          error make { msg: "unknown repo type" }
        }
      )

      let shouldUpdate = (if ($forceCheck) {
        print -e $"(ansi light_yellow) update ($packageName) - (ansi light_yellow_underline)forced(ansi reset)"
        true
      } else if ($newrev != $verinfo.rev) {
        print -e $"(ansi light_yellow) update ($packageName) - (ansi light_yellow_underline)update to ($newrev)(ansi reset)"
        true
      } else {
        print -e $"(ansi dark_gray) update ($packageName) - noop(ansi reset)"
        false
      })

      if ($shouldUpdate) {
        do -c { ^sd -s $"($verinfo.rev)" $"($newrev)" $"($position)" }
        print -e {packageName: $packageName, oldrev: $verinfo.rev, newrev: $newrev}

        replaceHash $packageName $position "sha256" $verinfo.sha256
        if "vendorSha256" in ($verinfo | transpose | get column0) {
          replaceHash $packageName $position "vendorSha256" $verinfo.vendorSha256
        }

        do -c {
          ^git commit $position -m $"auto-update: ($packageName): ($verinfo.rev) => ($newrev)"
        } | complete
      }

      null
    } # end !skip
  } # end each-pkg loop
}

def buildDrv [ drvRef: string ] {
  header "white_reverse" $"build ($drvRef)" "░"
  header "blue_reverse" $"eval ($drvRef)"
  let evalJobs = (
    ^nix-eval-jobs
      --flake $".#($drvRef)"
      --check-cache-status
        | from json --objects
  )

  header "green_reverse" $"build ($drvRef)"
  print -e ($evalJobs
    | where isCached == false
    | select name isCached)

  $evalJobs
    | where isCached == false
    | each { |drv| do -c  { ^nix build $'($drv.drvPath)^*' } }

  header "purple_reverse" $"cache: calculate paths: ($drvRef)"
  let pushPaths = ($evalJobs | each { |drv|
    $drv.outputs | each { |outPath|
      if ($outPath.out | path exists) {
        $outPath.out
      }
    }
  })
  print -e $pushPaths

  if ($env.CACHIX_SIGNING_KEY != "null") {
    let cachePathsStr = ($pushPaths | each {|it| $"($it)(char nl)"} | str join)

    let cacheResults = (echo $cachePathsStr | ^cachix push $env.CACHIX_CACHE | complete)
    header "purple_reverse" $"cache/push ($drvRef)"
    print -e $cacheResults
  } else {
    print -e "'$CACHIX_SIGNING_KEY_NIXPKGS_WAYLAND' not set, not pushing to cachix."
  }
}

def "main rereadme" [] {
  let color = "yellow"
  header $"($color)_reverse" $"readme"
  let packageNames = (nix eval --json $".#packages.($system)" --apply 'x: builtins.attrNames x' | str trim | from json)
  let pkgList = ($packageNames | where ($it != "default"))
  let delimStart = "<!--pkgs-start-->"
  let delimEnd = "<!--pkgs-end-->"
  let pkgrows = ($pkgList | each { |packageName|
    let meta = (do -c {
      nix eval --json $".#packages.($system).($packageName).meta" | str trim | from json
    })
    let home = (if "homepage" in ($meta | transpose | get column0) {
      $meta.homepage
    } else { "__missing__" })
    ($"| [($packageName)]\(($home)\) | ($meta.description) |")
  })
  let rows = [
    $delimStart
    "| Package | Description |"
    "| --- | --- |"
    $pkgrows
    $delimEnd
  ]
  let tableText = ($rows | flatten | str join "\n")

  let regexString = ([ '(?s)(.*)' $delimStart '(.*)' $delimEnd '(.*)' ] | str join '')
  let replaceText = $"\$1($tableText)\$3"
  ^rg --multiline $regexString "README.md" --replace $replaceText | save --raw README2.md
  mv -f README2.md README.md

  do -i { ^git commit -m "auto-update: updated readme" "./README.md" }
}

def "main build" [] {
  buildDrv $"packages.($system)"
  print -e ""
  buildDrv $"devShells.($system).default.inputDerivation"
}

def flakeAdvance [] {
  header "purple_reverse" "advance flake inputs"
  ^nix flake lock --recreate-lock-file --commit-lock-file
}

def gitPush [] {
  header "purple_reverse" "git push origin HEAD"
  ^git push origin HEAD
}

def "main advance" [] {
  flakeAdvance
  main build
  gitPush
}

def "main update" [] {
  flakeAdvance
  updatePkgs
  main build
  main rereadme
  gitPush
}

def main [] {
  print -e "commands: [advance, update, build]"
}