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137 lines
4.2 KiB
Racket
137 lines
4.2 KiB
Racket
#lang racket/base
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(require racket/system racket/port racket/file
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racket/class racket/list)
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(require "debug.rkt" sugar "world.rkt")
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(provide setup)
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(define cd (current-directory))
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(define test-mode (make-parameter #f))
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;; simple class for setup tasks
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(define task%
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(class object%
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(init do-proc [undo-proc #f])
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(define this-do do-proc)
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(define this-undo undo-proc)
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(super-new)
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(define/public (do-task) (this-do))
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(define/public (undo-task) (if this-undo (this-undo) (void)))))
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;; function for invoking method of multiple objects
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(define-syntax send-each
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(syntax-rules ()
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;; invoke a method of every object in list
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[(send-each objects do-method)
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(for-each (λ(obj) (send obj do-method)) objects)]
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;; invoke a method of every object in list, but
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;; if error, invoke the undo method all the way backwards
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;; allows structured cleanup
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[(send-each objects do-method undo-method)
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(begin
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(define (send-stack-inner objects-inner)
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(if (empty? objects-inner)
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(void)
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(with-handlers ([exn:fail? (λ(err)
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(begin
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(send (car objects-inner) undo-method)
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(raise err)))])
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(send (car objects-inner) do-method)
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(send-stack-inner (cdr objects-inner)))))
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;; error has been handled all the way back up the stack
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;; so kill it here
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(with-handlers ([exn:fail? (λ(err) (void))])
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(send-stack-inner objects)))]))
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(define (make-polcom-data racket-path)
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(format "#! ~a
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#lang racket/base
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(require pollen/command)
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;; pollen setup run in ~a on ~a"
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racket-path
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cd
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(format "~a at ~a" (make-datestamp) (make-timestamp))))
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;; task: get confirmation
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(define (get-confirmation)
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(message (format "Set up ~a as a pollen directory? ['y' or 'yes']" cd))
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(define setup-confirm (->string (read)))
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(when (not (ormap (λ(input)(equal? setup-confirm input)) (list "y" "yes")))
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(error))
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(message (format "Setting up ~a as a pollen directory" cd)))
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(define (abort-confirmation)
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(message "Aborting setup"))
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(define confirm-setup
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(new task%
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[do-proc get-confirmation]
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[undo-proc abort-confirmation]))
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;; task: make polcom file
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(define (delete-polcom-file-if-existing)
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(when (file-exists? COMMAND_FILE)
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(begin
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(message (format "Deleting existing polcom file in ~a" cd))
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(delete-file COMMAND_FILE))))
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(define (save-polcom-file)
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(define path-to-racket-exists? (> (len RACKET_PATH) 0))
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(if path-to-racket-exists?
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(let ([polcom-data (make-polcom-data RACKET_PATH)])
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(message (format "Using ~a as racket path" RACKET_PATH))
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(delete-polcom-file-if-existing)
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(message (format "Creating new polcom file in ~a" cd))
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(if (not (test-mode))
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(begin
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(display-to-file polcom-data COMMAND_FILE)
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(with-output-to-string (λ() (system (format "chmod 755 ~a" COMMAND_FILE)))))
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(message "[test mode: file would be saved now]")))
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(begin
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(message "No path to Racket binary")
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(error))))
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(define (abort-polcom-file)
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(message "Couldn't create polcom file")
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(delete-polcom-file-if-existing))
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(define make-polcom
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(new task%
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[do-proc save-polcom-file]
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[undo-proc abort-polcom-file]))
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;; task: report success
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(define (success-messages)
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(message "Setup complete")
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(define path-to-polcom (format "~a~a" cd COMMAND_FILE))
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(message (format "Run '~a start' to start project server" path-to-polcom))
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(message (format "Or run '~a help' for a list of commands" path-to-polcom))
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(when (not (test-mode)) (exit)))
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(define report-success
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(new task%
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[do-proc success-messages]))
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(define (setup)
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(define tasks (list confirm-setup make-polcom report-success))
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(send-each tasks do-task undo-task))
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;; better way to do this is to create separate removal tasks
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;; (that may rely on some of the same intermediate functions)
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;; so that errors can be caught on the way out too.
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;; also, remove conflicts with existing racket name
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;;(define (remove)
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;; (send-each (reverse tasks) remove-task))
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(module+ main
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(parameterize ([test-mode #t])
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(setup))) |