Comparing and Merging Files with GNU diff and patch by David MacKenzie PDF

By David MacKenzie

This handbook describes tips to examine and merge documents utilizing GNU diff and patch. evaluating and merging documents is a typical job for software program builders. those courses make it effortless to discover and follow alterations. GNU diff is a part of the GNU diffutils package deal, a whole set of courses for dealing with modifications among teams of records. GNU patch permits those transformations to be allotted in an effective layout. this can be a revealed replica of the offical GNU diffutils handbook. It files the entire diffutils courses (diff, cmp, sdiff, diff3), plus GNU patch. GNU diff and patch are unfastened software program. for every reproduction of this guide offered, $1 might be donated to the unfastened software program beginning.

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Example text

This ensures that all following tab characters are in the same position relative to tab stops that they were in the original files, so that the output is aligned correctly. Its disadvantage is that it can make long lines too long to fit on one line of the screen or the paper. It also does not work with the unified output format, which does not have a space character after the change type indicator character. Select this method with the ‘-T’ or ‘--initial-tab’ option. 2 Paginating diff Output It can be convenient to have long output page-numbered and timestamped.

1 [patch Options], page 87. 1 [Sample diff Input], page 11, for the complete contents of the two files): #ifndef TWO The Way that can be told of is not the eternal Way; The name that can be named is not the eternal name. #endif /* ! TWO */ The Nameless is the origin of Heaven and Earth; #ifndef TWO The Named is the mother of all things. #else /* TWO */ The named is the mother of all things. #endif /* TWO */ Therefore let there always be non-being, so we may see their subtlety, And let there always be being, so we may see their outcome.

Gnu diff3 normally behaves like traditional Unix diff3, but with the ‘-i’ option it behaves like System V diff3 and appends the ‘w’ and ‘q’ commands. The ‘-i’ option requires one of the ed script options ‘-AeExX3’, and is incompatible with the merged output option ‘-m’. 4 [Side by Side], page 19). Use ‘-o file’ or ‘--output=file’ to specify where to put the merged text. See Chapter 16 [Invoking sdiff], page 93, for more details on the options to sdiff. Another way to merge files interactively is to use the Emacs Lisp package emerge.

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