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;;======================================================================
;; Copyright 2006-2013, Matthew Welland.
;;
;; This program is made available under the GNU GPL version 2.0 or
;; greater. See the accompanying file COPYING for details.
;;
;; This program is distributed WITHOUT ANY WARRANTY; without even the
;; implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;; PURPOSE.
(use sql-de-lite) ;; srfi-1 posix regex regex-case srfi-69 nanomsg srfi-18 call-with-environment-variables)
(define (env:open-db fname)
(let* ((db-exists (file-exists? fname))
(exec (sql db "CREATE TABLE envvars (
id INTEGER PRIMARY KEY,
context TEXT NOT NULL,
var TEXT NOT NULL,
val TEXT NOT NULL,
CONSTRAINT envvars_constraint UNIQUE (context,var))"))))
(set-busy-handler! db (busy-timeout 10000))
db))
;; save vars in given context, this is NOT incremental by default
;;
(define (env:save-env-vars db context #!key (incremental #f)(vardat #f))
(with-transaction
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;;======================================================================
;; Copyright 2006-2013, Matthew Welland.
;;
;; This file is part of Megatest.
;;
;; Megatest 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 3 of the License, or
;; (at your option) any later version.
;;
;; Megatest 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 Megatest. If not, see <http://www.gnu.org/licenses/>.
;;======================================================================
(declare (unit env))
(use sql-de-lite) ;; srfi-1 posix regex regex-case srfi-69 srfi-18 call-with-environment-variables)
(define (env:open-db fname)
(let* ((db-exists (if (equal? fname ":memory:")
#f
(common:file-exists? fname)))
(db (open-database fname)))
(if (not db-exists)
(begin
(exec (sql db "CREATE TABLE IF NOT EXISTS envvars (
id INTEGER PRIMARY KEY,
context TEXT NOT NULL,
var TEXT NOT NULL,
val TEXT NOT NULL,
CONSTRAINT envvars_constraint UNIQUE (context,var))"))))
(set-busy-handler! db (busy-timeout 10000))
db))
;; save vars in given context, this is NOT incremental by default
;;
(define (env:save-env-vars db context #!key (incremental #f)(vardat #f))
(with-transaction
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(lambda (context)
(query
(for-each-row
(lambda (row)
(let ((var (car row))
(val (cadr row)))
(hash-table-set! result var
(if (and (hash-table-ref/default results var #f)
(assoc var paths)) ;; this var is a path and there is a previous path
(let ((sep (cadr (assoc var paths))))
(env:merge-path-envvar sep (hash-table-ref results var) valb))
valb)))))
(sql db "SELECT var,val FROM envvars WHERE context=?")
context))
contexts)
result))
;; get list of removed variables between two contexts
;;
(define (env:get-removed db contexta contextb)
(let ((result (make-hash-table)))
(query
(for-each-row
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(lambda (context)
(query
(for-each-row
(lambda (row)
(let ((var (car row))
(val (cadr row)))
(hash-table-set! result var
(if (and (hash-table-ref/default result var #f)
(assoc var paths)) ;; this var is a path and there is a previous path
(let ((sep (cadr (assoc var paths))))
(env:merge-path-envvar sep (hash-table-ref result var) val))
val)))))
(sql db "SELECT var,val FROM envvars WHERE context=?")
context))
contexts)
result))
;; envdelta: a-b (start=a, end=b, get the delta)
;; ofile: #f = write to stdout, else write to file with string name
;;
(define (env:envdelta db envdelta ofile)
(let ((match (string-split envdelta "-")));; (string-match "([a-z0-9_]+)=([a-z0-9_\\-,]+)" envdelta)))
(if (not (null? match))
(let* ((parts match) ;; (string-split equn "-"))
(minuend (car parts))
(subtraend (cadr parts))
(added (env:get-added db minuend subtraend))
(removed (env:get-removed db minuend subtraend))
(changed (env:get-changed db minuend subtraend)))
;; (pp (hash-table->alist added))
;; (pp (hash-table->alist removed))
;; (pp (hash-table->alist changed))
(if (args:get-arg "-o")
(with-output-to-file
(args:get-arg "-o")
(lambda ()
(env:print added removed changed)))
(env:print added removed changed)))
#f)))
;; get list of removed variables between two contexts
;;
(define (env:get-removed db contexta contextb)
(let ((result (make-hash-table)))
(query
(for-each-row
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(query
(for-each-row
(lambda (row)
(let ((var (car row))
(val (cadr row)))
(hash-table-set! result var val))))
(sql db "SELECT var,val FROM envvars AS a WHERE context=? AND val != (SELECT val FROM envvars WHERE var=a.var AND context=?)")
contexta contextb)
result))
;;
(define (env:blind-merge l1 l2)
(if (null? l1) l2
(if (null? l2) l1
(cons (car l1) (cons (car l2) (env:blind-merge (cdr l1) (cdr l2)))))))
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(query
(for-each-row
(lambda (row)
(let ((var (car row))
(val (cadr row)))
(hash-table-set! result var val))))
(sql db "SELECT var,val FROM envvars AS a WHERE context=? AND val != (SELECT val FROM envvars WHERE var=a.var AND context=?)")
contextb contexta)
result))
;;
(define (env:blind-merge l1 l2)
(if (null? l1) l2
(if (null? l2) l1
(cons (car l1) (cons (car l2) (env:blind-merge (cdr l1) (cdr l2)))))))
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