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diff.r

REBOL [ Title: "Diff compare" Date: 20-Jul-1999 File: %diff.r Author: "Bohdan Lechnowsky" Purpose: { See the differences between two files. Only provides basic DIFF functionality. Shows lines which don't exist in other file. } Email: %bo--rebol--com library: [ level: 'intermediate platform: none type: 'tool domain: 'file-handling tested-under: none support: none license: none see-also: none ] ] diff: func [ "Compares two files for differences" file1 [file!] file2 [file!] /local f-1 f-2 ][ foreach [f file][f-1 file1 f-2 file2][ if not exists? get file [print [file "not found"] exit] set f read/lines get file ] foreach [block1 block2 name1] reduce [f-1 f-2 file2 f-2 f-1 file2][ print ["*****" name1 "*****" newline "Lines which are not present in the other." newline "-------------------------------------"] forall block1 [ if none? find block2 first block1 [ print [index? block1 ":" first block1] ] ] ] ]
halt ;; to terminate script if DO'ne from webpage
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