#lang zuo
(require "racket/src/lib.zuo")

;; This Zuo script drives a Racket build from a Git checkout, either
;; for an in-place build (which is the most typical mode), a Unix-style
;; build, or a distro-build server or client.

;; Build options are provided as <variable>=<value> command-line
;; arguments, as in
;;   zuo . PKGS="compiler-lib"
;; or
;;   zuo main.zuo unix-style PKGS="compiler-lib"
;; All variables are described in `Makefile`, which also provides
;; all default values.

;; `Makefile` also effectively lists the available targets, and it
;; bounces each of those targets to this script after ensuring that a
;; `zuo` executable is built.

(provide-targets targets-at)

;; We ignore the `at-dir` argument and instead do everything
;; relative to the source directory
(define (targets-at at-dir-ignored [vars (hash)])
  (define config (config-file->hash (at-source "Makefile") vars))
  (define (lookup key [default ""]) (hash-ref config key default))
  (define (lookup! key) (or (hash-ref config key #f)
                            (error "required configuration entry is missing" key)))

  (define build-config.rktd (at-source "build/config/config.rktd"))
  (define build/site.rkt (at-source "build/site.rkt"))

  (define vm (let ([cb (lookup 'CLIENT_BASE)]
                   [wcb (lookup 'WIN32_CLIENT_BASE)])
               (cond
                 [(equal? cb "cs-base") 'cs]
                 [(equal? cb "bc-base") 'bc]
                 [(equal? wcb "win-cs-base") 'cs]
                 [(equal? wcb "win-bc-base") 'bc]
                 [else (string->symbol (lookup 'VM "cs"))])))

  (define required-pkgs (shell->strings (hash-ref config 'REQUIRED_PKGS)))
  (define default-src-catalog (hash-ref config 'DEFAULT_SRC_CATALOG))

  (define (get-provided-racket)
    (let ([r (lookup 'RACKET)])
      (if (equal? r "")
          (lookup 'PLAIN_RACKET)
          r)))

  (define (get-jobs)
    (define cpus (let ([s (lookup 'CPUS)])
                   (and (not (equal? s ""))
                        s)))
    (define simple-jobs (or cpus
                            (let ([s (lookup 'JOBS)])
                              (and (not (equal? s ""))
                                   s))))
    (define jobs (or simple-jobs
                     (let ([l (string-split (lookup 'JOB_OPTIONS))])
                       (and (= 2 (length l))
                            (equal? (car l) "-j")
                            (cadr l)))))
    (define n-jobs (and jobs (string->integer jobs)))
    (when (and jobs
               (or (not n-jobs)
                   (< n-jobs 1)))
      (error (~a (if cpus "CPUS" (if simple-jobs "JOBS" "JOB_OPTIONS argument"))
                 "is not a positive integer"
                 jobs)))
    (or n-jobs
        (infer-gnu-make-jobs)))

  (define (build-options)
    (define n-jobs (get-jobs))
    (if n-jobs
        (hash 'jobs n-jobs)
        (hash)))

  (define (get-job-options)
    (define jobs (get-jobs))
    (if jobs
        (list "-j" (~a jobs))
        '()))

  (define (setup-options)
    (define opts (lookup 'PLT_SETUP_OPTIONS))
    (build-shell opts (get-job-options)))

  (define (get-mcr-args)
    (list "-MCR" (~a (path->complete-path (at-source "build/zo")) ":")))

  ;; ------------------------------------------------------------
  ;; pb setup

  (define (check-mode mode)
    (define mode-file (at-source "racket/src/build/checkout-mode"))
    (cond
      [(file-exists? mode-file)
       (define old-mode (file->string mode-file))
       (unless (equal? old-mode mode)
         (error (~a "checkout previously built in "
                    (~s old-mode)
                    " mode; start with a fresh checkout for "
                    (~s mode)
                    " mode")))]
      [else
       (mkdir-p (path-only mode-file))
       (display-to-file mode mode-file)]))
 
  ;; ------------------------------------------------------------
  ;; pb setup

  (define (pb-manage step)
    (define boot-dir (at-source "racket/src/ChezScheme/boot"))
    (define pb-dir (build-path boot-dir "pb"))
    (define branch (lookup! 'PB_BRANCH))
    (cond
      [(eq? step 'fetch)
       (mkdir-p boot-dir)
       (if (directory-exists? pb-dir)
           (shell/wait "git fetch -q origin" (~a branch ":remotes/origin/" branch)
                       (hash 'dir pb-dir))
           (shell/wait "git clone -q" (lookup 'SINGLE_BRANCH_FLAG)
                       "-b" branch (string->shell
                                    (let ([ex (lookup 'EXTRA_REPOS_BASE)])
                                      (if (equal? ex "")
                                          (lookup! 'PB_REPO)
                                          (~a ex "pb/.git"))))
                       (string->shell pb-dir)))
       (shell/wait "git remote set-branches origin" branch
                   (hash 'dir pb-dir))
       (shell/wait "git checkout -q" branch
                   (hash 'dir pb-dir))]
      [(eq? step 'build)
       (define scheme (let ([s (lookup 'SCHEME)])
                        (if (equal? s "")
                            (find-executable-path "scheme")
                            s)))
       (cond
         [scheme
          (define reboot (dynamic-require "racket/src/ChezScheme/s/reboot.zuo" 'reboot))
          (reboot 'infer "pb" scheme (hash 'work-dir "build" 'out-dir "racket/src/ChezScheme"))]
         [else
          (shell/wait "racket ../rktboot/main.rkt --machine pb"
                      (hash 'dir (at-source "racket/src/ChezScheme")))])]
      [(eq? step 'stage)
       (define options (hash 'dir pb-dir))
       (shell/wait "git branch" branch options)
       (shell/wait "git checkout" branch options)
       (shell/wait "git add . && git commit --amend --reset-author -m" (string->shell "new build")
        options)]
      [(eq? step 'push)
       (shell/wait "git push -u origin" branch
                   (hash 'dir pb-dir))]
      [else
       (error "unknown pb step" step)]))

  ;; ------------------------------------------------------------
  ;; base, in-place, and unix-style

  ;; non-#f prefix implies Unix-style build:
  (define (build-base subdir token [options (hash)])
    (define also? (hash-ref options 'also? #f))
    (define prefix (hash-ref options 'prefix #f))
    (define targets
      (configured-targets-at (hash
                              'configure (if (eq? 'windows (hash-ref (runtime-env) 'toolchain-type))
                                             (at-source "racket/src" subdir "winfig.bat")
                                             (at-source "racket/src" subdir "configure"))
                              'inputs (list (at-source "racket/src" subdir "Makefile.in"))
                              'outputs (list (at-source "racket/src/build" subdir "Makefile"))
                              'configure-args (append
                                               (shell->strings (shell-subst-pwd (lookup 'CONFIGURE_ARGS_qq)
                                                                                (at-source "racket/src/build" subdir)))
                                               (shell->strings (lookup 'CONFIGURE_ARGS))
                                               (if (hash-ref options 'server-compile-machine? #f)
                                                   '("--enable-crossany")
                                                   '())
                                               (shell->strings (lookup 'DISABLE_STATIC_LIBS))
                                               (cond
                                                 [(and (equal? subdir "cs/c")
                                                       (equal? (lookup 'RACKETCS_SUFFIX) ""))
                                                  '("--enable-csdefault")]
                                                 [(and (equal? subdir "bc")
                                                       (equal? (lookup 'RACKETBC_SUFFIX) ""))
                                                  '("--enable-bcdefault")]
                                                 [else '()])
                                               (cond
                                                 [(eq? 'windows (hash-ref (runtime-env) 'toolchain-type))
						  '()]
                                                 [prefix (list (~a "--prefix=" prefix)
                                                               "--enable-macprefix")]
                                                 [else '("--disable-useprefix"
                                                         "--enable-origtree")]))
                              'vars (hash-maybe-set*
                                     (hash
                                      ;; causes the `raco setup` step to not build
                                      ;; installed packages (unless `prefix`):
                                      'SELF_ROOT_CONFIG_DIR (if prefix
                                                                ""
                                                                (path-only build-config.rktd))
                                      'SETUP_MACHINE_FLAGS (build-shell
                                                            (lookup 'SETUP_MACHINE_FLAGS)
                                                            (if (hash-ref options 'server-compile-machine? #f)
                                                                (map string->shell (get-mcr-args))
                                                                ""))
                                      'PLT_SETUP_OPTIONS (build-shell
                                                          (if also? "-D" "")
                                                          (setup-options))
                                      'DESTDIR (if prefix
                                                   (lookup 'DESTDIR "")
                                                   "")
                                      'CS_INSTALLED (lookup 'RACKETCS_SUFFIX)
                                      'MMM_INSTALLED (lookup 'RACKETBC_SUFFIX)
                                      'MMM_CAP_INSTALLED (string-upcase (lookup 'RACKETBC_SUFFIX))
                                      ;; for a unix-style install, we'll run any needed
                                      ;; `DESTDIR` fixes later:
                                      'SKIP_DESTDIR_FIX "skip"
                                      ;; Propagate `MAKE`
                                      'MAKE (lookup 'MAKE))
                                     ;; Propagate `RACKET` and similar if specified
                                     'RACKET (get-provided-racket)
                                     'BOOTFILE_RACKET (lookup 'BOOTFILE_RACKET)
                                     'SCHEME (lookup 'SCHEME)
                                     'SCHEME_DIR (let ([s (lookup 'CS_HOST_WORKAREA_PREFIX)])
                                                   (if (equal? s "")
                                                       ""
                                                       (build-path s "ChezScheme")))
                                     'CROSS_MODE (if (equal? (lookup 'CS_CROSS_SUFFIX) "-cross")
                                                     "cross"
                                                     "")))))
    (build (find-target "build" targets)
           #f
           (build-options))
    (when (eq? 'windows (system-type))
      (remove-early-load-dlls))
    (build (find-target "install-again" targets)
           #f
           (build-options)))

  (define (remove-early-load-dlls)
    ;; On Windows, remove DLLs that might be loaded by `raco` on startup,
    ;; but which we might need to reinstall via `raco`
    (for-each (lambda (dll)
                (rm* (at-source "racket/lib" dll)))
              '("longdouble.dll"
                "libiconv-2.dll"
                "iconv.dll"
                "libeay32.dll"
                "ssleay32.dll")))

  (define (native-for-cross subdir token)
    (define targets
      (configured-targets-at (hash
                              'configure (if (eq? 'windows (system-type))
                                             (at-source "racket/src" subdir "winfig.bat")
                                             (at-source "racket/src" subdir "configure"))
                              'configure-args (if (equal? subdir "cs/c")
                                                  (list "--enable-csdefault")
                                                  (list "--enable-bcdefault"))
                              'inputs (list (at-source "racket/src" subdir "Makefile.in"))
                              'outputs (list (at-source "racket/src/build/cross" subdir "Makefile"))
                              'vars (hash))))
    (build (find-target "build" targets)
           #f
           (build-options)))

  (define (find-racket vm [config (at-source "racket/etc")] [options (hash)])
    (define provided-racket (get-provided-racket))
    (define racket.exe
      (cond
        [(not (equal? provided-racket ""))
         (executable->path provided-racket at-source)]
        [else
         (define sfx (if (eq? vm 'cs)
                         (lookup 'RACKETCS_SUFFIX)
                         (lookup 'RACKETBC_SUFFIX)))
         (cond
           [(eq? 'windows (system-type))
            (at-source "racket" (~a "Racket" (string-upcase sfx) ".exe"))]
           [else
            (at-source "racket/bin" (~a "racket" sfx))])]))
    (hash 'racket racket.exe
          'racket-args (append (shell->strings (lookup 'SETUP_MACHINE_FLAGS))
                               (if (hash-ref options 'server-compile-machine? #f)
                                   (get-mcr-args)
                                   '())
                               (list "-G" config
                                     "-X" (at-source "racket/collects")))))

  (define (local-catalog [racket (hash-ref (find-racket vm) 'racket)]
                         [raco #f])
    (define loc-catalog (at-source "build/local/pkgs-catalog"))
    (define unix-catalog (at-source "build/local/catalog"))
    (process/wait racket "-l-" "pkg/dirs-catalog" "--check-metadata" loc-catalog "pkgs")
    (process/wait (or raco racket)
                  (if raco '() (list "-l-" "raco"))
                  "pkg" "catalog-copy" "--force" "--from-config" loc-catalog
                  unix-catalog)
    unix-catalog)

  (define (setup vm . args)
    (raco (find-racket vm)
          "setup"
          args
          (shell->strings (setup-options))))

  (define (maybe-fetch vm)
    (when (eq? vm 'cs)
      (when (andmap (lambda (key) (equal? (lookup key) ""))
                    '(RACKET BOOTFILE_RACKET PLAIN_RACKET SCHEME SCHEME_DIR))
        (pb-manage 'fetch))))

  (define (base token vm [options (hash)])
    (build/dep (find-target build-config.rktd the-targets) token)
    (cond
      [(eq? vm 'cs)
       (build-base "cs/c" token options)]
      [else
       (build-base "bc" token options)]))

  ;; currently does not support Windows or cross compilation
  (define (unix-style token vm)
    (check-mode "unix-style")
    (define prefix (lookup! 'PREFIX))
    (when (equal? prefix "")
      (error "supply PREFIX=<prefix> for a unix-style installation"))
    (maybe-fetch vm)
    ;; builds and installs to `DESTDIR` plus `prefix`
    (base token vm (hash 'prefix prefix))
    ;; run installed `raco` and `racket`
    (define raco (at-destdir vars (build-path prefix "bin" "raco")))
    (define racket (at-destdir vars (build-path prefix "bin" "racket")))
    ;; setup installed catalog
    (define src-catalog (lookup 'SRC_CATALOG))
    (unless (equal? src-catalog default-src-catalog)
      (process/wait raco "pkg" "config" "-i"
                    "--set" "catalogs" src-catalog ""))
    ;; create local catalog
    (define unix-catalog (local-catalog racket raco))
    ;; install packages
    (define jobs (get-jobs))
    (process/wait raco "pkg" "install"
                  (if jobs (list "-j" (~a jobs)) '())
                  "--catalog" unix-catalog "--auto" "-i"
                  required-pkgs
                  (shell->strings (lookup 'PKGS)))
    ;; destdir fixups
    (define at-vm-dir (make-at-dir (at-source "racket/src/build" (if (eq? vm 'cs) "cs/c" "bc"))))
    (define config (config-file->hash (at-vm-dir "Makefile") vars))
    (maybe-libzo-move config racket #f at-vm-dir)
    (maybe-destdir-fix config racket #f at-vm-dir))

  (define (as-is token vm)
    (check-mode "in-place")
    (base token vm)
    (racket (find-racket vm)
            (list "-U" "-G" (path-only build-config.rktd)
                  (at-source "racket/src/pkgs-config.rkt")
                  "--maybe-update-stamp"))
    (setup vm))

  (define (in-place token vm [also? #f] [setup-extra-args ""])
    (check-mode "in-place")
    (maybe-fetch vm)
    (base token vm (hash 'also? also?))

    (define vars (find-racket vm))
    (define jobs (get-jobs))

    (unless also?
      (pkgs-catalog token vars)

      (raco vars "pkg" "update"
            "--all" "--auto" "--no-setup" "--scope" "installation"
            (shell->strings (lookup 'PKG_UPDATE_OPTIONS)))
      (raco vars "pkg" "install"
            (if jobs (list "-j" (~a jobs)) '())
            "--no-setup" "--pkgs" "--skip-installed" "--scope" "installation"
            "--deps" "search-auto"
            required-pkgs
            (shell->strings (lookup 'PKGS)))
      (setup vm "--only-foreign-libs"))

    (setup vm (shell->strings setup-extra-args)
           (if also? "-D" '())))

  (define (pkgs-catalog token vars)
    (racket vars
            (list "-U" "-G" (path-only build-config.rktd)
                  "-l-" "pkg/dirs-catalog"
                  "--link" "--check-metadata" "--immediate"
                  (at-source "racket/share/pkgs-catalog")
                  (local-pkg-dirs)))
    (racket vars
            (list "-U" "-G" (path-only build-config.rktd)
                  (at-source "racket/src/pkgs-config.rkt")
                  "--pkgs-catalog"
                  default-src-catalog
                  (lookup 'SRC_CATALOG)))
    (racket vars
            (at-source "racket/src/pkgs-check.rkt")
            (at-source "racket/share/pkgs-catalog")))

  (define (local-pkg-dirs)
    (list (at-source "pkgs")
          (at-source "racket/src/expander")
          (at-source "racket/src/zuo/zuo-doc")))

  ;; ------------------------------------------------------------
  ;; Distribution builds: server
  
  (define svr-prt (~a (lookup 'SERVER) ":" (lookup 'SERVER_PORT)))
  (define svr-cat (~a (lookup 'SERVER_URL_SCHEME) "://" svr-prt "/" (lookup 'SERVER_CATALOG_PATH)))
  (define config+mode (list (lookup 'CONFIG) (lookup 'CONFIG_MODE)))
  (define user-flags (list "-A" "build/user"))

  ;; Catch problems due to malformed distribution-build packages
  (define recompile-options (list "--recompile-only"))
  
  (define auto-options (list "--skip-installed" "--deps" "search-auto" "--pkgs" (get-job-options)))
  (define user-auto-options (list "--scope" "user" auto-options))
  (define source-user-auto (list "--catalog" "build/catalog-copy" user-auto-options
                                 (shell->strings (lookup 'SERVER_PKG_INSTALL_OPTIONS))))
  (define remote-user-auto (list "--catalog" svr-cat user-auto-options))
  (define remote-inst-auto (list "--catalog" svr-cat "--scope" "installation"
                                 auto-options recompile-options
                                 (shell->strings (lookup 'PKG_INSTALL_OPTIONS))))

  (define (find-built-racket options)
    (define vars (find-racket vm
                              (at-source "build/user/config")
                              (if (or (and (hash-ref options 'cross? #f)
                                           (eq? vm 'cs))
                                      (hash-ref options 'server-compile-machine? #t))
                                  (hash 'server-compile-machine? #t)
                                  (hash))))
    (hash-set vars
              'racket-args
              (append (hash-ref vars 'racket-args '())
                      (list '"-A" "build/user"))))

  (define (built-racket options . args)
    (racket (find-built-racket options) args))
  (define (built-raco options . args)
    (built-racket options "-N" "raco" "-l-" "raco" args))

  (define (add-server-compile-machine options)
    (if (equal? "-M" (lookup 'SERVER_COMPILE_MACHINE))
        (hash-set options 'server-compile-machine? #t)
        options))

  (define (server token [options (hash)])
    (check-mode "server")
    (maybe-fetch 'cs)
    (rm* "build/zo")
    (base token vm (add-server-compile-machine options))
    (server-from-base token options))

  (define (server-from-base token [options-in (hash)])
    (check-mode "server")
    (make-build/site.rkt)
    (define options (add-server-compile-machine options-in))
    (update-stamp.txt options)

    ;; Create a copy of `SRC_CATALOG', so that we snapshot checksums, and
    ;; start building from it. The packages are installed in user scope,
    ;; but we set the add-on directory to "build/user", so that we don't
    ;; affect the actual current user's installation (and to a large degree
    ;; we're insulated from it). Before using `SRC_CATALOG`, though, use
    ;; packages that are part of the main repo in preference to entries
    ;; in the catalog.
    (rm* "build/user")
    (define link-catalog "build/link-catalog")
    (rm* link-catalog)
    (built-racket options
                  "-l-" "pkg/dirs-catalog" "--immediate"
                  link-catalog
                  (local-pkg-dirs))
    (rm* "build/catalog-copy")
    (built-raco options "pkg" "catalog-copy"
                link-catalog (lookup 'SRC_CATALOG)
                "build/catalog-copy")
    (server-cache-config options)
    (built-raco options "pkg" "install" "--all-platforms" source-user-auto
                required-pkgs
                (shell->strings (lookup 'DISTRO_BUILD_PKGS)))
    (server-set-config options)
    (built-racket options "-l-" "distro-build/pkg-info" "-o" "build/pkgs.rktd" "build/catalog-copy")
    (built-racket options "-l" "distro-build/install-pkgs" config+mode
                  (build-shell (lookup 'PKGS) (lookup 'TEST_PKGS))
                  source-user-auto
                  "--all-platforms")
    (built-raco options "setup" "--avoid-main" (get-job-options))

    ;; Although a client will build its own "collects", pack up the
    ;; server's version to be used by each client, so that every client has
    ;; exactly the same bytecode (which matters for SHA1-based dependency
    ;; tracking)
    (built-racket options "-l" "distro-build/pack-collects")

    ;; Now that we've built packages from local sources, create "built"
    ;; versions of the packages from the installation into "build/user"
    (built-racket options "-l-" "distro-build/pack-built"
                  (shell->strings (lookup 'PACK_BUILT_OPTIONS))
                  "build/pkgs.rktd")

    (built-catalog-server token options))

  (define (built-catalog-server token [options (hash)])
    ;; Run a catalog server to provide pre-built packages, as well
    ;; as the copy of the server's "collects" tree:
    (when (directory-exists? ".git")
      (shell/wait "git update-server-info"))
    (let ([rkt (find-built-racket options)])
      (built-racket options "-l" "distro-build/serve-catalog" config+mode
                    (lookup 'SERVER_HOSTS) (lookup 'SERVER_PORT)
                    (hash-ref rkt 'racket) (hash-ref rkt 'racket-args)
                    (or (hash-ref options 'serve-during-cmd #f)
                        (shell->strings (lookup 'SERVE_DURING_CMD_qq))))))

  (define (make-build/site.rkt)
    (when (and (equal? (lookup 'CONFIG) build/site.rkt)
               (not (file-exists? build/site.rkt)))
      (mkdir-p (path-only build/site.rkt))
      (display-to-file (~a "#lang distro-build/config\n"
                           "(machine)")
                       build/site.rkt)))
  
  (define (update-stamp.txt options)
    (define given-stamp (lookup 'BUILD_STAMP))
    (define stamp
      (cond
        [(not (equal? given-stamp ""))
         given-stamp]
        [else
         (define cmds
           (list (find-built-racket options)
                 (at-source "racket/src/pkgs-config.rkt")
                 "--display-auto-stamp"))
         (define p
           (apply racket/process (append cmds (list (hash 'stdout 'pipe)))))
         (define r
           (fd-read (hash-ref p 'stdout) eof))
         (process-wait (hash-ref p 'process))
         (unless (= 0 (process-status (hash-ref p 'process)))
           (error "failed" cmds))
         (car (string-split r "\n"))]))
    (display-to-file (~a stamp "\n") (at-source "build/stamp.txt") :truncate))

  (define (server-cache-config options)
    (built-raco options "pkg" "config" "-i" "--set" "download-cache-dir" "build/cache")
    (built-raco options "pkg" "config" "-i" "--set" "download-cache-max-files" "1023")
    (built-raco options "pkg" "config" "-i" "--set" "download-cache-max-bytes" "671088640"))
  
  (define (server-set-config options)
    (built-racket options "-l" "distro-build/set-server-config" "build/user/config/config.rktd"
                  config+mode "" "" (lookup 'DOC_SEARCH) ""))

  ;; ------------------------------------------------------------
  ;; Distribution builds: client

  (define (client token [options-in (hash)])
     (cond
      [(directory-exists? "build/log") ; => server space also used for client build
       (check-mode "server")]
      [else
       (check-mode "client")
       (rm* "build/user")])
    (maybe-fetch 'cs)
    (base token vm options-in)

    (define cross? (or (hash-ref options-in 'server-compile-machine? #f)
                       (equal? (lookup 'BUNDLE_FROM_SERVER_TARGET) "bundle-cross-from-server")
                       (equal? (lookup 'CS_CROSS_SUFFIX) "-cross")))
    (define options (if cross?
                        (hash-set options-in 'cross? #t)
                        options-in))

    (define (built-racket* . args) (built-racket options args))
    (define (built-raco* . args) (built-raco options args))
    
    ;; Install the "distro-build" package from the server into
    ;; a local build:
    (built-raco* "pkg" "install" remote-user-auto "distro-build-client")

    (when cross?
      (rm* (apply build-path (cons "build/zo" (cdr (explode-path (path->complete-path (at-source "bundle"))))))))
    ;; Copy our local build into a "bundle/racket" build, dropping in the
    ;; process things that should not be in an installer (such as the "src"
    ;; directory). Then, replace the "collects" tree with the one from the
    ;; server. Run `raco setup` in case the replacing "collects" tree needs
    ;; recompiling. Install required packages next, because they may include
    ;; packages that are needed to make core functionality work right
    ;; (which as the SQLite3 library). At last, install the selected packages
    ;; from the server, and the run a post-adjustment script.
    (rm* "bundle")
    (mkdir-p "bundle/racket")
    (built-racket* "-l" "setup/unixstyle-install" "bundle" "racket" "bundle/racket")
    (built-racket* "-l" "setup/winstrip" "bundle/racket")
    (built-racket* "-l" "setup/winvers-change" "bundle/racket")
    (built-racket* "-l-" "distro-build/unpack-collects" (shell->strings (lookup 'UNPACK_COLLECTS_FLAGS))
                   (~a (lookup 'SERVER_URL_SCHEME) "://" svr-prt "/" (lookup 'SERVER_COLLECTS_PATH)))
    (in-bundle-raco options "setup" "--no-user" (get-job-options) recompile-options)
    (define pkg-source-flags (shell->strings (lookup 'PKG_SOURCE_MODE)))
    (in-bundle-raco options "pkg" "install" remote-inst-auto pkg-source-flags required-pkgs)
    (in-bundle-raco options "pkg" "install" remote-inst-auto pkg-source-flags (shell->strings (lookup 'PKGS)))
    (built-racket* "-l" "setup/unixstyle-install" "post-adjust" (lookup 'SOURCE_MODE) (lookup 'PKG_SOURCE_MODE) "racket" "bundle/racket")

    (built-racket* "-l" "distro-build/set-config" "bundle/racket/etc/config.rktd"
                   (lookup 'INSTALL_NAME) (lookup 'BUILD_STAMP) (lookup 'DOC_SEARCH)
                   (if (hash-ref options 'from-site? #f)
                       (list (~a (lookup 'SERVER_URL_SCHEME) "://" svr-prt "/"
                                 (let ([s (lookup 'SITE_PATH)])
                                   (if (or (equal? s "") (= (char "/") (string-ref s (- (string-length s) 1))))
                                       s
                                       (~a s "/")))
                                 "catalog/")
                             "")
                       (shell->strings (lookup 'DIST_CATALOGS_q))))

    (built-racket* "-l-" "distro-build/installer"
                   "--readme" (lookup 'README) "--upload" (lookup 'UPLOAD)
                   "--desc" (lookup 'DIST_DESC)
                   (shell->strings (lookup 'RELEASE_MODE))
                   (shell->strings (lookup 'SOURCE_MODE))
                   (shell->strings (lookup 'VERSIONLESS_MODE))
                   (shell->strings (lookup 'MAC_PKG_MODE))
                   (shell->strings (lookup 'TGZ_MODE))
                   "--packed-options" (lookup 'INSTALLER_OPTIONS)
                   "--pre-process" (lookup 'INSTALLER_PRE_PROCESS_BASE64)
                   "--post-process" (lookup 'INSTALLER_POST_PROCESS_BASE64)
                   (shell->strings (lookup 'NOTARIZATION_CONFIG))
                   (lookup 'DIST_NAME) (lookup 'DIST_BASE) (lookup 'DIST_DIR)
                   (lookup 'DIST_SUFFIX)
                   (lookup 'SIGN_IDENTITY) (lookup 'OSSLSIGNCODE_ARGS_BASE64)))

  (define (in-bundle-raco options . args)
    (if (hash-ref options 'cross? #f)
        (built-racket options
                      (list "-G" "bundle/racket/etc" "-X" "bundle/racket/collects"
                            "-C" "-A" "bundle/user" "-l" "raco")
                      args)
        (shell/wait (if (eq? 'windows (system-type))
                        "bundle\\racket\\raco.exe"
                        "bundle/racket/bin/raco")
                    args)))

  (define (test-client token [options (hash)])
    (in-bundle-raco options
                    "pkg" "install" remote-inst-auto (shell->strings (lookup 'PKG_SOURCE_MODE))
                    (shell->strings (lookup 'TEST_PKGS)))
    (in-bundle-raco options
                    "test" (shell->strings (lookup 'TEST_ARGS_q))))

  ;; ------------------------------------------------------------
  ;; Distribution builds: installers

  (define (installers token)
    (rm* "build/installers")
    (server token (hash 'serve-during-cmd (get-drive-clients-args))))

  (define (installers-from-built token)
    (built-catalog-server token (add-server-compile-machine
                                 (hash 'serve-during-cmd (get-drive-clients-args)))))

  (define (get-drive-clients-args [describe-clients? #f])
    (list "-l-" "distro-build/drive-clients"
          (if describe-clients?
              (list "--describe")
              '())
          (shell->strings (lookup 'RELEASE_MODE))
          (shell->strings (lookup 'SOURCE_MODE))
          (shell->strings (lookup 'VERSIONLESS_MODE))
          (shell->strings (lookup 'CLEAN_MODE))
          (shell->strings (lookup 'SERVER_COMPILE_MACHINE))
          config+mode
          (lookup 'SERVER) (lookup 'SERVER_PORT)
          (lookup 'SERVER_HOSTS)
          (lookup 'PKGS)
          (lookup 'DOC_SEARCH) (lookup 'DIST_NAME)
          (lookup 'DIST_BASE) (lookup 'DIST_DIR)))

  (define (describe-clients token)
    (built-racket (hash) (get-drive-clients-args #t)))

  ;; ------------------------------------------------------------
  ;; Distribution builds: site and snapshot

  (define (site token)
    (installers token)
    (site-from-installers token))

  (define (site-from-installers token)
    (define options (add-server-compile-machine (hash)))
    (rm* "build/docs")
    (rm* (build-path "build/zo"
                     (apply build-path (cdr (explode-path (hash-ref (runtime-env) 'dir))))
                     "build/docs"))
    (built-racket options "-l-" "distro-build/install-for-docs" "build/docs"
                  config+mode (lookup 'PKGS)
                  "build/built/catalog" "build/native/catalog")
    (built-racket options "-l-" "distro-build/assemble-site"
                  config+mode (lookup 'DIST_BASE)))

  (define (snapshot-site token)
    (site token)
    (snapshot-at-site token))

  (define (snapshot-at-site token)
    (define options (add-server-compile-machine (hash)))
    (built-racket options "-l-" "distro-build/manage-snapshots" config+mode (lookup 'DIST_BASE)))

  ;; ------------------------------------------------------------
  ;; Derived: steps that require a working `racket` to build things
  ;; that need to be in sync to build `racket` in the first place

  (define (derived token)
    (define (build-one src target-name)
      (let ([src (at-source src)])
        (build (find-target target-name
                            ((dynamic-require src 'targets-at)
                             (make-at-dir (path-only src))))
               token)))
    (build-one "racket/src/rktio/build.zuo" "rktio-rktl")
    (build-one "racket/src/expander/main.zuo" "expander")
    (build-one "racket/src/cs/main.zuo" "schemified"))

  ;; ------------------------------------------------------------
  ;; Targets

  (define the-targets
    (make-targets
     `([:target in-place () ,(lambda (token) (in-place token vm))]
       [:target as-is () ,(lambda (token) (as-is token vm))]
       [:target base () ,(lambda (token) (maybe-fetch vm) (base token vm))]
       [:target unix-style () ,(lambda (token) (unix-style token vm))]

       [:target both () ,(lambda (token)
                           (in-place token vm #f "--error-out build/step")
                           (in-place token (if (eq? vm 'cs) 'bc 'cs) #t "--error-in build/step"))]
       [:target also-in-place () ,(lambda (token) (in-place token vm #t))]
       
       [:target cs () ,(lambda (token) (in-place token 'cs))]
       [:target cs-base () ,(lambda (token) (maybe-fetch 'cs) (base token 'cs))]
       [:target cs-as-is () ,(lambda (token) (as-is token 'cs))]
       [:target cs-in-place () ,(lambda (token) (in-place token 'cs))]
       [:target cs-unix-style () ,(lambda (token) (unix-style token 'cs))]

       [:target bc () ,(lambda (token) (in-place token 'bc))]
       [:target bc-base () ,(lambda (token) (base token 'bc))]
       [:target bc-as-is () ,(lambda (token) (as-is token 'bc))]
       [:target bc-in-place () ,(lambda (token) (in-place token 'bc))]
       [:target bc-unix-style () ,(lambda (token) (unix-style token 'bc))]

       [:target pb-fetch () ,(lambda (token) (pb-manage 'fetch))]
       [:target pb-build () ,(lambda (token) (pb-manage 'build))]
       [:target pb-stage () ,(lambda (token) (pb-manage 'stage))]
       [:target pb-push () ,(lambda (token) (pb-manage 'push))]

       [:target pkgs-catalog () ,(lambda (token) (pkgs-catalog token (find-racket vars vm)))]

       [:target native-cs-for-cross () ,(lambda (token) (maybe-fetch 'cs) (native-for-cross "cs/c" token))]
       [:target native-bc-for-cross () ,(lambda (token) (native-for-cross "bc" token))]

       [:target server () ,(lambda (token) (server token))]
       [:target server-from-base () ,(lambda (token) (server-from-base token))]

       [:target client () ,(lambda (token) (client token))]
       [:target client-compile-any () ,(lambda (token) (client token (hash 'server-compile-machine? #t)))]
       [:target client-from-site () ,(lambda (token) (client token (hash 'from-site? #t)))]

       [:target test-client () ,(lambda (token) (test-client token))]

       [:target installers () ,(lambda (token) (installers token))]
       [:target installers-from-built () ,(lambda (token) (installers-from-built token))]
       [:target describe-clients () ,(lambda (token) (describe-clients token))]

       [:target site () ,(lambda (token) (site token))]
       [:target site-from-installers () ,(lambda (token) (site-from-installers token))]

       [:target snapshot-site () ,(lambda (token) (snapshot-site token))]
       [:target snapshot-at-site () ,(lambda (token) (snapshot-at-site token))]

       [:target ,build-config.rktd ()
                ,(lambda (path token)
                   (mkdir-p (path-only path))
                   (display-to-file "#hash((links-search-files . ()))\n"
                                    path
                                    :truncate))]

       [:target local-catalog () ,(lambda (token) (local-catalog))]

       [:target derived () ,(lambda (token) (derived token))]

       ;; does nothing; used to make sure that "main.zuo" loads without error
       [:target ping () ,(lambda (token) (alert "pong"))])))

  the-targets)