Newer
Older
Francois-Rene Rideau
committed
#+xcvb (module (:depends-on ("pkgdcl")))
Francois-Rene Rideau
committed
#|
If/when ironclad provides tth, we should use that.
Until then, let's rely on the external utility tthsum.
|#
(defparameter +base32-characters+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567")
(defun tthsum-for-files (files)
(loop :for file :in files
:for p = (probe-file file)
:collect (when p
(output-tthsum (tthsum-file p)))))
(defun ensure-tthsum-present ()
(values))
#| ;; Implementation from before we were using ironclad
(defun tthsum-for-files (files)
(when files
Francois-Rene Rideau
committed
(loop :for file :in files :collect
(or (probe-file file) (error "File ~A does not exist" file))))
(namestrings (mapcar #'namestring truefiles))
(lines (run-program/ (cons "tthsum" namestrings) :output :lines)))
Francois-Rene Rideau
committed
(unless lines
(error "Couldn't extract TTH digest for given files. Is the tthsum utility installed?"))
(unless (list-of-length-p (length files) lines)
(error "tthsum output has wrong number of lines"))
(loop :for file :in files
:for namestring :in namestrings
:for line :in lines
:for len = (length line)
:collect
(progn
(unless (and (= len (+ 41 (length namestring)))
(string= line " " :start1 39 :end1 41)
(string= line namestring :start1 41)
(loop :repeat 39 :for c :across line
:always (find c +base32-characters+)))
(error "unexpected tthsum output line ~S for file ~S" line file))
(subseq line 0 39))))))
(defun has-tthsum-p ()
(let ((s (ignore-errors
(run-program/
'("tthsum" #-windows "/dev/null" #+windows "NUL")
:output :string))))
Francois-Rene Rideau
committed
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
(and (>= (length s) 41)
(string= s "LWPNACQDBZRYXW3VHJVCJ64QBZNGHOHHHZWCLNQ" :end1 39))))
(defun ensure-tthsum-present ()
(unless (has-tthsum-p)
(errexit 2 "~&XCVB's master mode (enabled by default) requires the tthsum utility.
If you are using Debian or Ubuntu, you can install it with:
sudo apt-get install tthsum
If you are unable to install this utility, you may disable XCVB's master mode
by passing option --no-master to xcvb make-makefile.
The XCVB master mode is what allows you to load into a running image
new or updated FASLs that you build with XCVB.~%")))
|#
(defun tthsum-for-files-or-nil (specs)
(let* ((files (remove nil specs))
(tthsums (tthsum-for-files files)))
(loop :for spec :in specs
:collect (when spec (pop tthsums)))))
(defun tthsum-for-file (file)
(car (tthsum-for-files (list file))))
(defun output-tthsum (sum &optional s)
(with-output (s)
(princ (tthsum-to-string sum) s)))
(defun tthsum-to-string (sum)
;; beware: a base-string, not a simple-string, so not simply readable
(subseq (binascii:encode sum :base32) 0 39))
(defun tthsum-from-string (string)
(binascii:decode string :base32))
(defun tthsum-string (string)
(tthsum-sequence (babel:string-to-octets string :encoding :utf-8)))
(defun tthsum-sequence (sequence)
(ironclad:digest-sequence :tree-hash sequence))
(defun tthsum-file (file)
(ironclad:digest-file :tree-hash file))
(defun tthsum-stream (stream)
(ironclad:digest-stream :tree-hash stream))
(defun tthsum-object (object)
(tthsum-string
(with-safe-io-syntax ()
(write-to-string object
:readably nil :pretty nil))))
(defgeneric digest (x))
(defmethod digest ((x string))
Francois-Rene Rideau
committed
(tthsum-string x))
(defmethod digest ((x vector))
(unless (typep x '(simple-array (unsigned-byte 8) (*)))
(error "Can only digest ub8 vectors and strings"))
Francois-Rene Rideau
committed
(tthsum-sequence x))
(defmethod digest ((x pathname))
(tthsum-file x))
(defmethod digest ((x cons))
Francois-Rene Rideau
committed
(tthsum-object x))