# The textproc/agrep port

## agrep-2.04p0 – approximate grep (fast approximate pattern-matching tool)

## Description

    Agrep is a tool for fast text searching allowing errors.

    The three most significant features of agrep that are not supported by
    the grep family are
    1) the ability to search for approximate patterns;
        for example, "agrep -2 homogenos foo" will find homogeneous as well
        as any other word that can be obtained from homogenos with at most
        2 substitutions, insertions, or deletions.
        "agrep -B homogenos foo" will generate a message of the form
        best match has 2 errors, there are 5 matches, output them? (y/n)
    2) agrep is record oriented rather than just line oriented;  a record
        is by default a line, but it can be user defined;
        for example, "agrep -d '^From ' 'pizza' mbox"
        outputs all mail messages that contain the keyword "pizza".
        Another example:  "agrep -d '$$' pattern foo" will output all
        paragraphs (separated by an empty line) that contain pattern.
    3) multiple patterns with AND (or OR) logic queries.
        For example, "agrep -d '^From ' 'burger,pizza' mbox"
        outputs all mail messages containing at least one of the
        two keywords (, stands for OR).
        "agrep -d '^From ' 'good;pizza' mbox" outputs all mail messages
        containing both keywords.

    Putting these options together one can ask queries like

    agrep -d '$$' -2 '<CACM>;TheAuthor;Curriculum;<198[5-9]>' bib

    which outputs all paragraphs referencing articles in CACM between
    1985 and 1989 by TheAuthor dealing with curriculum.
    Two errors are allowed, but they cannot be in either CACM or the year
    (the <> brackets forbid errors in the pattern between them).

    Two technical papers describing agrep are available as:

    	agrep.ps.1 is a technical report from June 1991 describing the
    	design and implementation of agrep
    		ftp://ftp.cs.arizona.edu/agrep/agrep.ps.1.Z

    	agrep.ps.2 is a copy of the paper as appeared in the 1992 Winter
    	USENIX conference.
    		ftp://ftp.cs.arizona.edu/agrep/agrep.ps.2.Z

No homepage

Distribution forbidden on cdroms
  no fee
Distribution forbidden on ftp
  may not modify
Categories:
  textproc

## Library dependencies

## Build dependencies

- STEM->=1.21:textproc/groff

## Run dependencies