build_grep_cmd

Constructs a safe and properly formatted grep command string for system execution.
This function handles input sanitization by utilizing R's internal shell quoting
mechanism, ensuring compatibility across different operating systems.

Provides an interface to the system-level 'grep' utility for
efficiently reading, filtering, and aggregating data from multiple flat
files. By pre-filtering data at the command line before it enters the
R environment, the package reduces memory overhead and improves
ingestion speed. Includes functions for counting records across large
file systems and supports recursive directory searching.

Akshat Maurya

grepreaper

Efficient Data Filtering and Aggregation Using Grep

David Shilane

Atharv Raskar

build_grep_cmd function

<dl><dt>pattern</dt>
<dd>Character vector of patterns to search for.</dd>
<dt>files</dt>
<dd>Character vector of file paths to search in.</dd>
<dt>options</dt>
<dd>Character string containing grep flags (e.g., "-i", "-v").</dd>
<dt>fixed</dt>
<dd>Logical; if TRUE, grep is told to treat patterns as fixed strings.</dd></dl>

Arguments

Build grep command string — build_grep_cmd

<dl>

<dt>pattern</dt>
<dd>Character vector of patterns to search for.</dd>


<dt>files</dt>
<dd>Character vector of file paths to search in.</dd>


<dt>options</dt>
<dd>Character string containing grep flags (e.g., "-i", "-v").</dd>


<dt>fixed</dt>
<dd>Logical; if TRUE, grep is told to treat patterns as fixed strings.</dd>

</dl>

build_grep_cmd: Build grep command string

Description

Usage

Value

Arguments