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Top Forums UNIX for Beginners Questions & Answers Grep -P does not capture the desired output Post 303037319 by Don Cragun on Monday 29th of July 2019 05:59:35 PM
Old 07-29-2019
Quote:
Originally Posted by Corona688
AFAIK the multiple characters as RS ought to work with most awk, what won't work with some is RS as a regex.
Hi Corona688,
That might be true in some implementations. (And the BSD based awk on MacOS Version 10.14.5 does work that way.) However, the description of the awk RS variable in the standards is:
Quote:
The first character of the string value of RS shall be the input record separator; a
<newline> by default. If RS contains more than one character, the results are
unspecified.
If RS is null, then records are separated by sequences consisting of a
<newline> plus one or more blank lines, leading or trailing blank lines shall not
result in empty records at the beginning or end of the input, and a <newline> shall
always be a field separator, no matter what the value of FS is.
This User Gave Thanks to Don Cragun For This Post:
 

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SVK::Command::Log(3)					User Contributed Perl Documentation				      SVK::Command::Log(3)

NAME
SVK::Command::Log - Show log messages for revisions SYNOPSIS
log DEPOTPATH log PATH log -r N[:M] [DEPOT]PATH OPTIONS
-r [--revision] ARG : ARG (some commands also take ARG1:ARG2 range) A revision argument can be one of: "HEAD" latest in repository {DATE} revision at start of the date NUMBER revision number NUMBER@ interpret as remote revision number NUM1:NUM2 revision range Unlike other commands, negative NUMBER has no meaning. -l [--limit] REV : stop after displaying REV revisions -q [--quiet] : Don't display the actual log message itself -x [--cross] : track revisions copied from elsewhere -v [--verbose] : print extra information --xml : display the log messages in XML format --filter FILTER : select revisions based on FILTER --output FILTER : display logs using the given FILTER DESCRIPTION
Display the log messages and other meta-data associated with revisions. SVK provides a flexible system allowing log messages and other revision properties to be displayed and processed in many ways. This flexibility comes through the use of "log filters." Log filters are of two types: selection and output. Selection filters determine which revisions are included in the output, while output filters determine how the information about those revisions is displayed. Here's a simple example. These two invocations produce equivalent output: svk log -l 5 //local/project svk log --filter "head 5" --output std //local/project The "head" filter chooses only the first revisions that it encounters, in this case, the first 5 revisions. The "std" filter displays the revisions using SVK's default output format. Selection filters can be connected together into pipelines. For example, to see the first 3 revisions with log messages containing the string 'needle', we might do this svk log --filter "grep needle | head 3" //local/project That example introduced the "grep" filter. The argument for the grep filter is a valid Perl pattern (with any '|' characters as '|' and '' as '\'). A revision is allowed to continue to the next stage of the pipeline if the revision's log message matches the pattern. If we wanted to search only the first 10 revisions for 'needle' we could use either of the following commands svk log --filter "head 10 | grep needle" //local/project svk log -l 10 --filter "grep needle" //local/project You may change SVK's default output filter by setting the SVKLOGOUTPUT environment. See svk help environment for details. Standard Filters The following log filters are included with the standard SVK distribution: Selection : grep, head, author Output : std, xml For detailed documentation about any of these filters, try "perldoc SVK::Log::Filter::Name" where "Name" is "Grep", "Head", "XML", etc.. Other log filters are available from CPAN <http://search.cpan.org> by searching for "SVK::Log::Filter". For details on writing log filters, see the documentation for the SVK::Log::Filter module. perl v5.10.0 2008-08-04 SVK::Command::Log(3)
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