mirror of
https://github.com/pgbackrest/pgbackrest.git
synced 2024-12-14 10:13:05 +02:00
381 lines
13 KiB
Perl
381 lines
13 KiB
Perl
####################################################################################################################################
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# CONFIG HELP MODULE
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####################################################################################################################################
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package BackRest::Config::Config::ConfigHelp;
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use strict;
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use warnings FATAL => qw(all);
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use Carp qw(confess);
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use Exporter qw(import);
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our @EXPORT = qw();
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use File::Basename qw(dirname);
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use lib dirname($0) . '/../lib';
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use BackRest::Common::Exception;
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use BackRest::Common::Log;
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use BackRest::Common::String;
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use BackRest::Config::Config;
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####################################################################################################################################
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# Help types
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####################################################################################################################################
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use constant CONFIG_HELP_COMMAND => 'command';
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push @EXPORT, qw(CONFIG_HELP_COMMAND);
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use constant CONFIG_HELP_CURRENT => 'current';
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push @EXPORT, qw(CONFIG_HELP_CURRENT);
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use constant CONFIG_HELP_DEFAULT => 'default';
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push @EXPORT, qw(CONFIG_HELP_DEFAULT);
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use constant CONFIG_HELP_DESCRIPTION => 'description';
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push @EXPORT, qw(CONFIG_HELP_DESCRIPTION);
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use constant CONFIG_HELP_OPTION => 'option';
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push @EXPORT, qw(CONFIG_HELP_OPTION);
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use constant CONFIG_HELP_SECTION => 'section';
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push @EXPORT, qw(CONFIG_HELP_SECTION);
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use constant CONFIG_HELP_SUMMARY => 'summary';
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push @EXPORT, qw(CONFIG_HELP_SUMMARY);
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use constant CONFIG_HELP_SOURCE => 'source';
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push @EXPORT, qw(CONFIG_HELP_SOURCE);
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use constant CONFIG_HELP_SOURCE_DEFAULT => 'default';
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push @EXPORT, qw(CONFIG_HELP_SOURCE_DEFAULT);
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use constant CONFIG_HELP_SOURCE_SECTION => CONFIG_HELP_SECTION;
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push @EXPORT, qw(CONFIG_HELP_SOURCE_SECTION);
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use constant CONFIG_HELP_SOURCE_COMMAND => CONFIG_HELP_COMMAND;
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push @EXPORT, qw(CONFIG_HELP_SOURCE_COMMAND);
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####################################################################################################################################
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# configHelp
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#
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# Display command-line help.
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####################################################################################################################################
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sub configHelp
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{
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my $strCommand = shift;
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my $strOption = shift;
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# Load module dynamically
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require BackRest::Config::Config::ConfigHelpData;
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BackRest::Config::Config::ConfigHelpData->import();
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# Get config data
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my $oCommandHash = commandHashGet();
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my $oOptionRule = optionRuleGet();
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my $oConfigHelpData = configHelpDataGet();
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# Build the title
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my $strTitle;
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my $strHelp;
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# Since there's no command this will be general help
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if (!defined($strCommand))
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{
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$strTitle = "General"
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}
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# Else check the command
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else
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{
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$strCommand = lc($strCommand);
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if (defined($$oCommandHash{$strCommand}))
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{
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$strTitle = "'${strCommand}' command";
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# And check the option
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if (defined($strOption))
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{
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$strOption = lc($strOption);
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if (defined($$oConfigHelpData{&CONFIG_HELP_COMMAND}{$strCommand}{&CONFIG_HELP_OPTION}{$strOption}))
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{
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$strTitle .= " - '${strOption}' option";
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}
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else
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{
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$strHelp = "Invalid option '${strOption}' for command '${strCommand}'";
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}
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}
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}
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else
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{
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$strHelp = "Invalid command '${strCommand}'";
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}
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}
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# Internal text format function to make output look good on a console
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sub formatText
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{
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my $strTextIn = shift;
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my $iIndent = shift;
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my $bIndentFirst = shift;
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my $iLength = shift;
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my @stryText = split("\n", trim($strTextIn));
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my $strText;
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my $iIndex = 0;
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foreach my $strLine (@stryText)
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{
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if (defined($strText))
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{
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$strText .= "\n";
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}
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my $strPart;
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my $bFirst = true;
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do
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{
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($strPart, $strLine) = stringSplit($strLine, ' ', $iLength - $iIndent);
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if (!$bFirst || $bIndentFirst)
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{
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if (!$bFirst)
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{
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$strText .= "\n";
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}
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$strText .= ' ' x $iIndent;
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}
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$strText .= trim($strPart);
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$bFirst = false;
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}
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while (defined($strLine));
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$iIndex++;
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}
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return $strText;
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}
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# Internal option find function
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#
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# The option may be stored with the command or in the option list depending on whether it's generic or command-specific
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sub optionFind
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{
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my $oConfigHelpData = shift;
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my $oOptionRule = shift;
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my $strCommand = shift;
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my $strOption = shift;
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my $strSection = CONFIG_HELP_COMMAND;
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my $oOption = $$oConfigHelpData{&CONFIG_HELP_COMMAND}{$strCommand}{&CONFIG_HELP_OPTION}{$strOption};
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if (ref(\$oOption) eq 'SCALAR')
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{
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$oOption = $$oConfigHelpData{&CONFIG_HELP_OPTION}{$strOption};
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if (defined($$oOption{&CONFIG_HELP_SECTION}))
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{
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$strSection = $$oOption{&CONFIG_HELP_SECTION};
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if ($strSection eq CONFIG_SECTION_COMMAND)
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{
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$strSection = CONFIG_SECTION_GENERAL;
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}
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}
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else
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{
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$strSection = CONFIG_SECTION_GENERAL;
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}
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if (($strSection ne CONFIG_SECTION_GENERAL && $strSection ne CONFIG_SECTION_LOG &&
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$strSection ne CONFIG_SECTION_STANZA && $strSection ne CONFIG_SECTION_EXPIRE) ||
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$strSection eq $strCommand)
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{
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$strSection = CONFIG_HELP_COMMAND;
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}
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}
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if (defined(optionDefault($strOption, $strCommand)))
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{
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if ($$oOptionRule{$strOption}{&OPTION_RULE_TYPE} eq &OPTION_TYPE_BOOLEAN)
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{
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$$oOption{&CONFIG_HELP_DEFAULT} = optionDefault($strOption, $strCommand) ? 'y' : 'n';
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}
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else
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{
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$$oOption{&CONFIG_HELP_DEFAULT} = optionDefault($strOption, $strCommand);
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}
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}
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if (optionTest($strOption) && optionSource($strOption) ne CONFIG_HELP_SOURCE_DEFAULT)
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{
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if ($$oOptionRule{$strOption}{&OPTION_RULE_TYPE} eq &OPTION_TYPE_BOOLEAN)
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{
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$$oOption{&CONFIG_HELP_CURRENT} = optionGet($strOption) ? 'y' : 'n';
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}
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else
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{
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$$oOption{&CONFIG_HELP_CURRENT} = optionGet($strOption);
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}
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}
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return $oOption, $strSection;
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}
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# Build the help
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my $strMore;
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if (!defined($strHelp))
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{
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my $iScreenWidth = 80;
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# General help
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if (!defined($strCommand))
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{
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$strHelp =
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"Usage:\n" .
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" " . BACKREST_EXE . " [options] [command]\n\n" .
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"Commands:\n";
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# Find longest command length
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my $iCommandLength = 0;
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foreach my $strCommand (sort(keys($$oConfigHelpData{&CONFIG_HELP_COMMAND})))
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{
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if (length($strCommand) > $iCommandLength)
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{
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$iCommandLength = length($strCommand);
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}
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}
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# Output commands
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foreach my $strCommand (sort(keys($$oConfigHelpData{&CONFIG_HELP_COMMAND})))
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{
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my $oCommand = $$oConfigHelpData{&CONFIG_HELP_COMMAND}{$strCommand};
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$strHelp .= " ${strCommand}" . (' ' x ($iCommandLength - length($strCommand)));
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$strHelp .=
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' ' . formatText($$oCommand{&CONFIG_HELP_SUMMARY}, 4 + $iCommandLength + 2, false, $iScreenWidth + 1) .
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"\n";
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}
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$strMore = '[command]';
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}
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# Else command help
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elsif (!defined($strOption))
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{
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my $oCommand = $$oConfigHelpData{&CONFIG_HELP_COMMAND}{$strCommand};
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$strHelp =
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formatText($$oCommand{&CONFIG_HELP_SUMMARY} . "\n\n" .
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$$oCommand{&CONFIG_HELP_DESCRIPTION}, 0, true, $iScreenWidth + 1);
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# Find longest option length and unique list of sections
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my $iOptionLength = 0;
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my $oSection = {};
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if (defined($$oCommand{&CONFIG_HELP_OPTION}))
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{
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foreach my $strOption (sort(keys($$oCommand{&CONFIG_HELP_OPTION})))
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{
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if (length($strOption) > $iOptionLength)
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{
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$iOptionLength = length($strOption);
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}
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my ($oOption, $strSection) = optionFind($oConfigHelpData, $oOptionRule, $strCommand, $strOption);
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$$oSection{$strSection}{$strOption} = $oOption;
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}
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# Iterate sections
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foreach my $strSection (sort(keys($oSection)))
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{
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$strHelp .=
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"\n\n" . ucfirst($strSection) . " Options:\n";
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# Iterate options
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foreach my $strOption (sort(keys($$oSection{$strSection})))
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{
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$strHelp .= "\n";
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my $iIndent = 4 + $iOptionLength + 2;
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my $oOption = $$oSection{$strSection}{$strOption};
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# Set current and default values
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my $strDefault = '';
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if ($$oOption{&CONFIG_HELP_CURRENT} || $$oOption{&CONFIG_HELP_DEFAULT})
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{
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$strDefault = undef;
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if ($$oOption{&CONFIG_HELP_CURRENT})
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{
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$strDefault .= 'current=' . $$oOption{&CONFIG_HELP_CURRENT};
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}
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if ($$oOption{&CONFIG_HELP_DEFAULT})
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{
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if (defined($strDefault))
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{
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$strDefault .= ', ';
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}
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$strDefault .= 'default=' . $$oOption{&CONFIG_HELP_DEFAULT};
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}
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$strDefault = " [${strDefault}]";
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}
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# Output help
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$strHelp .= " --${strOption}" . (' ' x ($iOptionLength - length($strOption)));
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$strHelp .= ' ' . formatText(lcfirst(substr($$oOption{&CONFIG_HELP_SUMMARY}, 0,
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length($$oOption{&CONFIG_HELP_SUMMARY}) - 1)) .
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$strDefault, $iIndent, false, $iScreenWidth + 1);
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}
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}
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$strMore = "${strCommand} [option]";
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$strHelp .= "\n";
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}
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}
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# Else option help
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else
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{
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my ($oOption) = optionFind($oConfigHelpData, $oOptionRule, $strCommand, $strOption);
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# Set current and default values
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my $strDefault = '';
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if ($$oOption{&CONFIG_HELP_CURRENT} || $$oOption{&CONFIG_HELP_DEFAULT})
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{
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$strDefault = undef;
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if ($$oOption{&CONFIG_HELP_CURRENT})
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{
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$strDefault = 'current: ' . $$oOption{&CONFIG_HELP_CURRENT};
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}
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if ($$oOption{&CONFIG_HELP_DEFAULT})
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{
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if (defined($strDefault))
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{
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$strDefault .= "\n";
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}
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$strDefault .= 'default: ' . $$oOption{&CONFIG_HELP_DEFAULT};
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}
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$strDefault = "\n\n${strDefault}";
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}
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# Output help
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$strHelp =
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formatText($$oOption{&CONFIG_HELP_SUMMARY} . "\n\n" . $$oOption{&CONFIG_HELP_DESCRIPTION} .
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$strDefault, 0, true, $iScreenWidth + 1);
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}
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}
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# Output help
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syswrite(*STDOUT, ' -' . (defined($strTitle) ? " ${strTitle}" : '') . " help\n\n${strHelp}\n" .
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(defined($strMore) ? 'Use \'' . BACKREST_EXE . " help ${strMore}' for more information.\n" : ''));
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}
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push @EXPORT, qw(configHelp);
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1;
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