Buildapp Hello Web World

一個更現實的例子涉及你在磁碟上使用多個檔案構建的專案（而不是傳遞給 buildapp 的 --eval 選項），以及一些依賴項。

因為在發現和載入 asdf 系統期間可能發生任意事情（包括載入其他可能不相關的系統），僅僅檢查你所依賴的專案的 asd 檔案是不夠的，以便找出你需要載入的內容。一般方法是使用 quicklisp 載入目標系統，然後呼叫 ql:write-asdf-manifest-file 寫出所有已載入的清單。

這是一個用 hunchentoot 構建的玩具系統，用於說明在實踐中可能發生的情況：

;;;; buildapp-hello-web-world.asd

(asdf:defsystem #:buildapp-hello-web-world
  :description "An example application to use when getting familiar with buildapp"
  :author "inaimathi <leo.zovic@gmail.com>"
  :license "Expat"
  :depends-on (#:hunchentoot)
  :serial t
  :components ((:file "package")
               (:file "buildapp-hello-web-world"))

;;;; package.lisp

(defpackage #:buildapp-hello-web-world
  (:use #:cl #:hunchentoot))

;;;; buildapp-hello-web-world.lisp

(in-package #:buildapp-hello-web-world)

(define-easy-handler (hello :uri "/") ()
  (setf (hunchentoot:content-type*) "text/plain")
  "Hello Web World!")

(defun main (argv)
  (declare (ignore argv))
  (start (make-instance 'easy-acceptor :port 4242))
  (format t "Press any key to exit...~%")
  (read-char))

;;;; build.lisp
(ql:quickload :buildapp-hello-web-world)
(ql:write-asdf-manifest-file "/tmp/build-hello-web-world.manifest")
(with-open-file (s "/tmp/build-hello-web-world.manifest" :direction :output :if-exists :append)
  (format s "~a~%" (merge-pathnames
            "buildapp-hello-web-world.asd"
            (asdf/system:system-source-directory
             :buildapp-hello-web-world))))

#### build.sh
sbcl --load "build.lisp" --quit

buildapp --manifest-file /tmp/build-hello-web-world.manifest --load-system hunchentoot --load-system buildapp-hello-web-world --output hello-web-world --entry buildapp-hello-web-world:main

將這些檔案儲存在名為 buildapp-hello-web-world 的目錄中後，就可以了

$ cd buildapp-hello-web-world/

$ sh build.sh 
This is SBCL 1.3.7.nixos, an implementation of ANSI Common Lisp.
More information about SBCL is available at <http://www.sbcl.org/>.

SBCL is free software, provided as is, with absolutely no warranty.
It is mostly in the public domain; some portions are provided under
BSD-style licenses.  See the CREDITS and COPYING files in the
distribution for more information.
To load "cffi":
  Load 1 ASDF system:
    cffi
; Loading "cffi"
........
To load "buildapp-hello-web-world":
  Load 1 ASDF system:
    buildapp-hello-web-world
; Loading "buildapp-hello-web-world"
....
;; loading system "cffi"
;; loading system "hunchentoot"
;; loading system "buildapp-hello-web-world"
[undoing binding stack and other enclosing state... done]
[saving current Lisp image into hello-web-world:
writing 4800 bytes from the read-only space at 0x20000000
writing 4624 bytes from the static space at 0x20100000
writing 66027520 bytes from the dynamic space at 0x1000000000
done]

$ ls -lh hello-web-world 
-rwxr-xr-x 1 inaimathi inaimathi 64M Aug 13 21:17 hello-web-world

這產生了一個二進位制檔案，它完全符合你的想法，如上所述。

$ ./hello-web-world 
Press any key to exit...

然後你應該能夠啟動另一個 shell，做 curl localhost:4242 並看到 Hello Web World! 的明文響應被列印出來。