[![Build Status](https://travis-ci.org/mfcovington/Perl-PrereqInstaller.svg?branch=master)](https://travis-ci.org/mfcovington/Perl-PrereqInstaller) [![Coverage Status](https://coveralls.io/repos/mfcovington/Perl-PrereqInstaller/badge.png?branch=master)](https://coveralls.io/r/mfcovington/Perl-PrereqInstaller?branch=master) # NAME Perl::PrereqInstaller - Install missing modules explicitly loaded in Perl files # VERSION Version 0.6.0 # SYNOPSIS Scan, Install, and report results via command line: install-perl-prereqs lib/ bin/ Scan files and Install modules via script: use Perl::PrereqInstaller; my $installer = Perl::PrereqInstaller->new; $installer->scan( @files, @directories ); $installer->cpanm; $installer->quiet(1); Access and report scan/install status via script: my @not_installed = $installer->not_installed; my @prev_installed = $installer->previously_installed; my @newly_installed = $installer->newly_installed; my @failed_install = $installer->failed_install; my @scan_errors = $installer->scan_errors; my %scan_warnings = $installer->scan_warnings; $installer->report; # DESCRIPTION Extract the names of the modules explicitly loaded in Perl files, check which modules are not installed, and install the missing modules. Since this module relies on [Perl::PrereqScanner](https://metacpan.org/pod/Perl::PrereqScanner) to statically identify dependencies, it has the same caveats regarding identifying loaded modules. Therefore, modules that are loaded dynamically (e.g., `eval "require $class"`) will not be identified as dependencies or installed. ## Command-line tool Command-line usage is possible with `install-perl-prereqs` (co-installed with this module). install-perl-prereqs FILE_OR_DIR [FILE_OR_DIR ...] -h, --help -d, --dry-run -q, --quiet -v, --version ## Methods for scanning files and installing modules - new Initializes a new Perl::PrereqInstaller object. - scan( FILES and/or DIRECTORIES ) Analyzes all specified FILES (regardless of file type) and Perl files (.pl/.pm/.cgi/.psgi/.t) within specified DIRECTORIES to generate a list of modules explicitly loaded and identify which are not currently installed. Subsequent use of `scan()` will update the lists of not yet installed and previously installed modules. - cpanm Use cpanm to install loaded modules that are not currently installed. - quiet( BOOLEAN ) Set quiet mode to on/off (default: off). Quiet mode turns off most of the output. If BOOLEAN is not provided, this method returns quiet mode's current state. ## Methods for accessing and reporting scan/install status - not\_installed Returns an alphabetical list of unique modules that were explicitly loaded, but need to be installed. Modules are removed from this list upon installation. - previously\_installed Returns an alphabetical list of unique installed modules that were explicitly loaded. - newly\_installed Returns an alphabetical list of unique modules that were explicitly loaded, needed to be installed, and were successfully installed. - failed\_install Returns an alphabetical list of unique modules that were explicitly loaded and needed to be installed, but whose installation failed. - scan\_errors Returns a list of files that produced a parsing error when being scanned. These files are skipped. - scan\_warnings Returns a hash of arrays containing the names of files (the keys) that raised warnings (the array contents) during parsing. These warnings are likely indicative of issues with the code in the parsed files rather than actual parsing problems. - report Write (to STDOUT) a summary of scan/install results. By default, all status methods below (except `scan_warnings`) are summarized. To customize the contents of `report()`, pass it an anonymous hash: $installer->report( { 'not_installed' => 0, 'previously_installed' => 0, 'newly_installed' => 1, 'failed_install' => 1, 'scan_errors' => 0, 'scan_warnings' => 0, } ); # SEE ALSO [Perl::PrereqScanner](https://metacpan.org/pod/Perl::PrereqScanner), [App::cpanoutdated](https://metacpan.org/pod/App::cpanoutdated), [lib::xi](https://metacpan.org/pod/lib::xi), [Module::Extract::Use](https://metacpan.org/pod/Module::Extract::Use) The command-line tool `scan-perl-prereqs` gets installed together with [Perl::PrereqScanner](https://metacpan.org/pod/Perl::PrereqScanner). The basic functionality of `install-perl-prereqs` can be recreated with `scan-perl-prereqs | cpanm`; however, `install-perl-prereqs` comes with a few bonuses, including: - Better error handling In the event of parse errors, `scan-perl-prereqs` dies even if there are files remaining to be scanned, whereas `install-perl-prereqs` logs the error and scans the next file. - Summary report `install-perl-prereqs` provides a summary of scan and install results. - No unexpected updates While `scan-perl-prereqs | cpanm` attempts to update all previously-installed modules found in a scan, `install-perl-prereqs` only attempts to install modules if they are not yet installed. Perhaps a better way to update installed CPAN modules is to use [cpan-outdated](https://metacpan.org/pod/cpan-outdated) (from [App::cpanoutdated](https://metacpan.org/pod/App::cpanoutdated): cpan-outdated -p | cpanm # SOURCE AVAILABILITY The source code is on Github: [https://github.com/mfcovington/Perl-PrereqInstaller](https://github.com/mfcovington/Perl-PrereqInstaller) # AUTHOR Michael F. Covington, # BUGS Please report any bugs or feature requests at [https://github.com/mfcovington/Perl-PrereqInstaller/issues](https://github.com/mfcovington/Perl-PrereqInstaller/issues). # INSTALLATION To install this module from GitHub using cpanm: cpanm git@github.com:mfcovington/Perl-PrereqInstaller.git Alternatively, download and run the following commands: perl Build.PL ./Build ./Build test ./Build install # SUPPORT AND DOCUMENTATION You can find documentation for this module with the perldoc command. perldoc Perl::PrereqInstaller # LICENSE AND COPYRIGHT Copyright 2014 Michael F. Covington. 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