#+xcvb
(module
 (:build-depends-on ("driver")
  :depends-on ("/asdf")))

;;; Versioning

(in-package :xcvb-driver)

(defun get-xcvb-directory ()
  (asdf:system-source-directory :xcvb))

(defun xcvb-git-checkout-p ()
  (asdf::probe-file* (asdf::subpathname (get-xcvb-directory) ".git/")))

(defun xcvb-version-file ()
  (asdf::subpathname (get-xcvb-directory) "version.text"))

(defun get-xcvb-version-from-git ()
  (and (xcvb-git-checkout-p)
       (first
        (run-program/
         (format nil "cd ~A ; git describe --tags --dirty=+" (get-xcvb-directory))
         :output :lines))))

(defun get-xcvb-version-from-file ()
  (with-open-file (s (xcvb-version-file) :direction :input :if-does-not-exist nil)
    (read s)))

(defun get-xcvb-version ()
  (or
   (get-xcvb-version-from-git)
   (get-xcvb-version-from-file)
   (error "Cannot determine XCVB version: neither .git/ nor version.text in ~A"
          (get-xcvb-directory))))

(defun make-xcvb-version-file (&optional file)
  (let ((version (get-xcvb-version-from-git))
        (file (asdf::merge-pathnames* file (xcvb-version-file))))
    (unless version
      (error "Could not get XCVB version from git"))
    (with-open-file (s file :direction :output
                       :if-does-not-exist :create :if-exists :rename-and-delete)
      (format s "~
;;; This file was automatically generated by (xcvb::make-xcvb-version-file)
;;; from a git checkout. It is only consulted in a gitless code checkout.
;;; Edit manually at your own risk.
~S~%"
              version))
    (when (>= (or *xcvb-verbosity* 5) 5)
      (format *error-output* "~&Saved version ~A in version file ~A~%"
	      version (truename file)))
    (values)))