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#!/bin/sh
# aside from this initial boilerplate, this is actually -*- scheme -*- code
main='(module-ref (resolve-module '\''(scripts api-diff)) '\'main')'
exec ${GUILE-guile} -l $0 -c "(apply $main (cdr (command-line)))" "$@"
!#
;;; api-diff --- diff guile-api.alist files
;; Copyright (C) 2002, 2006 Free Software Foundation, Inc.
;;
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation; either version 2, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this software; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301 USA
;;; Author: Thien-Thi Nguyen <ttn@gnu.org>
;;; Commentary:
;; Usage: api-diff [-d GROUPS] ALIST-FILE-A ALIST-FILE-B
;;
;; Read in the alists from files ALIST-FILE-A and ALIST-FILE-B
;; and display a (count) summary of the groups defined therein.
;; Optional arg "--details" (or "-d") specifies a comma-separated
;; list of groups, in which case api-diff displays instead the
;; elements added and deleted for each of the specified groups.
;;
;; For scheme programming, this module exports the proc:
;; (api-diff A-file B-file)
;;
;; Note that the convention is that the "older" alist/file is
;; specified first.
;;
;; TODO: Develop scheme interface.
;;; Code:
(define-module (scripts api-diff)
:use-module (ice-9 common-list)
:use-module (ice-9 format)
:use-module (ice-9 getopt-long)
:autoload (srfi srfi-13) (string-tokenize)
:export (api-diff))
(define (read-alist-file file)
(with-input-from-file file
(lambda () (read))))
(define put set-object-property!)
(define get object-property)
(define (read-api-alist-file file)
(let* ((alist (read-alist-file file))
(meta (assq-ref alist 'meta))
(interface (assq-ref alist 'interface)))
(put interface 'meta meta)
(put interface 'groups (let ((ht (make-hash-table 31)))
(for-each (lambda (group)
(hashq-set! ht group '()))
(assq-ref meta 'groups))
ht))
interface))
(define (hang-by-the-roots interface)
(let ((ht (get interface 'groups)))
(for-each (lambda (x)
(for-each (lambda (group)
(hashq-set! ht group
(cons (car x)
(hashq-ref ht group))))
(assq-ref x 'groups)))
interface))
interface)
(define (diff? a b)
(let ((result (set-difference a b)))
(if (null? result)
#f ; CL weenies bite me
result)))
(define (diff+note! a b note-removals note-additions note-same)
(let ((same? #t))
(cond ((diff? a b) => (lambda (x) (note-removals x) (set! same? #f))))
(cond ((diff? b a) => (lambda (x) (note-additions x) (set! same? #f))))
(and same? (note-same))))
(define (group-diff i-old i-new . options)
(let* ((i-old (hang-by-the-roots i-old))
(g-old (hash-fold acons '() (get i-old 'groups)))
(g-old-names (map car g-old))
(i-new (hang-by-the-roots i-new))
(g-new (hash-fold acons '() (get i-new 'groups)))
(g-new-names (map car g-new)))
(cond ((null? options)
(diff+note! g-old-names g-new-names
(lambda (removals)
(format #t "groups-removed: ~A\n" removals))
(lambda (additions)
(format #t "groups-added: ~A\n" additions))
(lambda () #t))
(for-each (lambda (group)
(let* ((old (assq-ref g-old group))
(new (assq-ref g-new group))
(old-count (and old (length old)))
(new-count (and new (length new)))
(delta (and old new (- new-count old-count))))
(format #t " ~5@A ~5@A : "
(or old-count "-")
(or new-count "-"))
(cond ((and old new)
(let ((add-count 0) (sub-count 0))
(diff+note!
old new
(lambda (subs)
(set! sub-count (length subs)))
(lambda (adds)
(set! add-count (length adds)))
(lambda () #t))
(format #t "~5@D ~5@D : ~5@D"
add-count (- sub-count) delta)))
(else
(format #t "~5@A ~5@A : ~5@A" "-" "-" "-")))
(format #t " ~A\n" group)))
(sort (union g-old-names g-new-names)
(lambda (a b)
(string<? (symbol->string a)
(symbol->string b))))))
((assq-ref options 'details)
=> (lambda (groups)
(for-each (lambda (group)
(let* ((old (or (assq-ref g-old group) '()))
(new (or (assq-ref g-new group) '()))
(>>! (lambda (label ls)
(format #t "~A ~A:\n" group label)
(for-each (lambda (x)
(format #t " ~A\n" x))
ls))))
(diff+note! old new
(lambda (removals)
(>>! 'removals removals))
(lambda (additions)
(>>! 'additions additions))
(lambda ()
(format #t "~A: no changes\n"
group)))))
groups)))
(else
(error "api-diff: group-diff: bad options")))))
(define (api-diff . args)
(let* ((p (getopt-long (cons 'api-diff args)
'((details (single-char #\d)
(value #t))
;; Add options here.
)))
(rest (option-ref p '() '("/dev/null" "/dev/null")))
(i-old (read-api-alist-file (car rest)))
(i-new (read-api-alist-file (cadr rest)))
(options '()))
(cond ((option-ref p 'details #f)
=> (lambda (groups)
(set! options (cons (cons 'details
(map string->symbol
(string-tokenize
groups
#\,)))
options)))))
(apply group-diff i-old i-new options)))
(define main api-diff)
;;; api-diff ends here
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