/usr/share/racket/collects/setup/main.rkt is in racket-common 6.7-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 | ;; Because Setup PLT is used to rebuild .zos, we may need to turn off
;; the use of compiled code or install cm before we do anything. This
;; startup stub parses the command line and either disables .zos or
;; installs cm for loading Setup PLT.
;; Note that this file is listed in "info.rkt" so that it never gets a
;; .zo file. Do not `require' this module from anywhere, not even
;; `for-label', otherwise it could get a .zo anyway.
;; Also, do not `require' any module that is compiled. That constraint
;; essentially restrcts this module to `require's of '#%... modules.
(module main '#%kernel
(#%require '#%min-stx
'#%utils ; for find-main-collects
;; Need to make sure they're here:
'#%builtin)
(module test '#%kernel)
(when (file-stream-port? (current-output-port))
(file-stream-buffer-mode (current-output-port) 'line))
(define-values (make-kernel-namespace)
(lambda ()
(let-values ([(ns) (make-empty-namespace)]
[(cns) (current-namespace)])
(namespace-attach-module cns ''#%builtin ns)
ns)))
(define-values (short-name long-names raco?)
;; Load the name module without using .zos, and in its own namespace to
;; avoid polluting the cm-managed namespace later
(parameterize ([use-compiled-file-paths null]
[current-namespace (make-kernel-namespace)])
((dynamic-require 'setup/private/command-name 'get-names))))
;; Poor-man's processing of the command-line flags to drop strings
;; that will not be parsed as flags by "parse-cmdline.rkt". We don't
;; want to load "parse-cmdline.rkt" because it takes a long time with
;; bytecode files disabled, and we're not yet sure whether to trust
;; bytecode files that do exist.
(define-values (filter-flags)
(lambda (flags)
(if (or (null? flags)
(not (regexp-match? #rx"^-" (car flags)))
(equal? "-l" (car flags)))
null
(if (equal? "-P" (car flags))
(if ((length flags) . > . 5)
(filter-flags (list-tail flags 5))
null)
(if (or (equal? "--mode" (car flags))
(equal? "--doc-pdf" (car flags)))
(if (pair? (cdr flags))
(filter-flags (cddr flags))
null)
(cons (car flags) (filter-flags (cdr flags))))))))
(define-values (flags) (filter-flags (vector->list (current-command-line-arguments))))
(define-values (member)
(lambda (a l)
(if (null? l)
#f
(if (equal? a (car l))
l
(member a (cdr l))))))
;; Checks whether a flag is present:
(define-values (on?)
(lambda (flag-name)
(member flag-name flags)))
(define-values (print-bootstrapping)
(lambda (why)
(fprintf (current-output-port) "~a: bootstrapping from source...\n (~a)\n"
short-name why)))
(define-values (main-collects-relative->path)
(let ([main-collects #f])
(lambda (p)
(unless main-collects
(set! main-collects (find-main-collects)))
(if (and (pair? p)
(eq? 'collects (car p)))
(apply build-path main-collects
(map bytes->path (cdr p)))
p))))
(if (or (on? "--clean")
(on? "-c")
(on? "--no-zo")
(on? "-n"))
;; Don't use .zos, in case they're out of date, and don't load
;; cm:
(when (or (on? "--clean")
(on? "-c"))
(use-compiled-file-paths null)
(print-bootstrapping "command-line --clean or -c"))
;; Load the cm instance to be installed while loading Setup PLT.
;; This has to be dynamic, so we get a chance to turn off compiled
;; file loading, and so it can be in a separate namespace.
(let-values ([(mk trust-zos)
;; Load cm.rkt into its own namespace, so that cm compiles
;; itself and its required modules in the right order
;; (i.e., when some module requires cm or one of its
;; required modules)
;; Since cm.rkt pulls in quite a lot of code itself, we
;; would like to load using .zo files. But if we discover
;; any date mismatch in the loading process, abort and
;; try again without .zo files. If .zo files are newer
;; than .rkt files but a required file is newer than its
;; requiring file, we won't notice, but that
;; shouldn't happen for a reasonably maintained
;; tree, and there's always --clean to turn this
;; off. If an .so file is used, we give up using
;; compiled files.
(let loop ([skip-zo/reason (and (null? (use-compiled-file-paths))
"empty use-compiled-file-paths")])
(when skip-zo/reason
(print-bootstrapping skip-zo/reason))
((call-with-escape-continuation
(lambda (escape)
;; Create a new namespace, and also install load handlers
;; to check file dates, if necessary.
(parameterize ([current-namespace (make-kernel-namespace)]
[use-compiled-file-paths
(if skip-zo/reason
null
(use-compiled-file-paths))]
[current-load
(let ([orig-load (current-load)])
(if skip-zo/reason
orig-load
(lambda (path modname)
(if (regexp-match? #rx#"[.]zo$" (path->bytes path))
;; It's a .zo:
(begin0
(orig-load path modname)
;; Force loading of all dependencies, which ensures
;; a rebuild if a #lang reader changes. (Otherwise,
;; the dependencies should be loaded already.)
;; We do not currently support "external" dependencies
;; (via cm-accomplice) during bootstrap.
(let ([deps (with-input-from-file
(path-replace-extension path #".dep")
read)])
(for-each (lambda (dep)
(let ([dep
(if (and (pair? dep)
(eq? (car dep) 'indirect))
(cdr dep)
dep)])
(unless (and (pair? dep)
(eq? (car dep) 'ext))
(dynamic-require (main-collects-relative->path dep) #f))))
(cddr deps))))
;; Not a .zo! Don't use .zo files at all...
(escape (lambda ()
;; Try again without .zo
(loop (format "loading non-.zo: ~a" path))))))))]
[current-load-extension
(if skip-zo/reason
(current-load-extension)
(lambda (path modname)
(escape (lambda ()
;; Try again without .zo
(loop "loading an extension")))))])
;; Other things could go wrong, such as a version mismatch.
;; If something goes wrong, of course, give up on .zo files.
(parameterize ([uncaught-exception-handler
(lambda (exn)
(when (exn:break? exn) (exit 1))
(if skip-zo/reason
(escape
(lambda () (raise exn)))
(escape
(lambda () (loop (if (exn:fail? exn)
(regexp-replace* #rx"\n" (exn-message exn) "\n ")
(format "uncaught exn: ~s" exn)))))))])
;; Here's the main dynamic load of "cm.rkt":
(let ([mk
(dynamic-require 'compiler/cm
'make-compilation-manager-load/use-compiled-handler)]
[trust-zos
(dynamic-require 'compiler/cm 'trust-existing-zos)])
;; Return the two extracted functions:
(lambda () (values mk trust-zos)))))))))])
(when (on? "--trust-zos")
(trust-zos #t))
(current-load/use-compiled (mk))))
;; This has to be dynamic, so we get a chance to turn off
;; .zo use and turn on the compilation manager.
(dynamic-require 'setup/setup-go #f))
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