175 lines
3.4 KiB
Groff
175 lines
3.4 KiB
Groff
.\" $FreeBSD$
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.\" $OpenBSD: sdiff.1,v 1.15 2007/06/29 14:48:07 jmc Exp $
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.\"
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.\" Written by Raymond Lai <ray@cyth.net>.
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.\" Public domain.
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.\"
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.Dd $Mdocdate: July 5 2012 $
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.Dt SDIFF 1
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.Os
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.Sh NAME
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.Nm sdiff
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.Nd side-by-side diff
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.Sh SYNOPSIS
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.Nm
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.Op Fl abdilstW
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.Op Fl I Ar regexp
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.Op Fl o Ar outfile
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.Op Fl w Ar width
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.Ar file1
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.Ar file2
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.Sh DESCRIPTION
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.Nm
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displays two files side by side,
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with any differences between the two highlighted as follows:
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new lines are marked with
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.Sq \*(Gt ;
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deleted lines are marked with
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.Sq \*(Lt ;
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and changed lines are marked with
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.Sq \*(Ba .
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.Pp
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.Nm
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can also be used to interactively merge two files,
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prompting at each set of differences.
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See the
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.Fl o
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option for an explanation.
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.Pp
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The options are:
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.Bl -tag -width Ds
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.It Fl l -left-column
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Only print the left column for identical lines.
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.It Fl o -output Ar outfile
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Interactively merge
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.Ar file1
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and
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.Ar file2
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into
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.Ar outfile .
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In this mode, the user is prompted for each set of differences.
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See
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.Ev EDITOR
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and
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.Ev VISUAL ,
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below,
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for details of which editor, if any, is invoked.
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.Pp
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The commands are as follows:
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.Bl -tag -width Ds
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.It Cm l | 1
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Choose left set of diffs.
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.It Cm r | 2
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Choose right set of diffs.
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.It Cm s
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Silent mode \(en identical lines are not printed.
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.It Cm v
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Verbose mode \(en identical lines are printed.
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.It Cm e
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Start editing an empty file, which will be merged into
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.Ar outfile
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upon exiting the editor.
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.It Cm e Cm l
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Start editing file with left set of diffs.
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.It Cm e Cm r
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Start editing file with right set of diffs.
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.It Cm e Cm b
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Start editing file with both sets of diffs.
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.It Cm q
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Quit
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.Nm .
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.El
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.It Fl s -suppress-common-lines
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Skip identical lines.
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.It Fl w -width Ar width
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Print a maximum of
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.Ar width
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characters on each line.
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The default is 130 characters.
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.El
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.Pp
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Options passed to
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.Xr diff 1
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are:
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.Bl -tag -width Ds
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.It Fl a -text
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Treat
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.Ar file1
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and
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.Ar file2
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as text files.
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.It Fl b -ignore-space-change
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Ignore trailing blank spaces.
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.It Fl d -minimal
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Minimize diff size.
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.It Fl I -ignore-matching-lines Ar regexp
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Ignore line changes matching
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.Ar regexp .
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All lines in the change must match
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.Ar regexp
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for the change to be ignored.
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.It Fl i -ignore-case
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Do a case-insensitive comparison.
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.It Fl t -expand-tabs
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Expand tabs to spaces.
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.It Fl W -ignore-all-space
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Ignore all spaces.
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.It Fl B -ignore-blank-lines
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Ignore blank lines.
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.It Fl E -ignore-tab-expansion
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Treat tabs and eight spaces as the same.
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.It Fl t -ignore-tabs
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Ignore tabs.
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.It Fl H -speed-large-files
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Assume scattered small changes in a large file.
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.It Fl -ignore-file-name-case
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Ignore the case of file names.
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.It Fl -no-ignore-file-name-case
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Do not ignore file name case.
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.It Fl -strip-trailing-cr
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Skip identical lines.
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.It Fl -tabsize Ar NUM
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Change the size of tabs (default is 8.)
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.El
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.Sh ENVIRONMENT
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.Bl -tag -width Ds
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.It Ev EDITOR , VISUAL
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Specifies an editor to use with the
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.Fl o
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option.
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If both
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.Ev EDITOR
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and
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.Ev VISUAL
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are set,
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.Ev VISUAL
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takes precedence.
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If neither
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.Ev EDITOR
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nor
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.Ev VISUAL
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are set,
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the default is
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.Xr vi 1 .
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.It Ev TMPDIR
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Specifies a directory for temporary files to be created.
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The default is
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.Pa /tmp .
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.El
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.Sh SEE ALSO
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.Xr cmp 1 ,
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.Xr diff 1 ,
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.Xr diff3 1 ,
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.Xr vi 1 ,
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.Xr re_format 7
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.Sh AUTHORS
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.Nm
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was written from scratch for the public domain by
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.An Ray Lai Aq ray@cyth.net .
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.Sh CAVEATS
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.Pp
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Tabs are treated as anywhere from one to eight characters wide,
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depending on the current column.
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Terminals that treat tabs as eight characters wide will look best.
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