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325 lines
12 KiB
325 lines
12 KiB
5 years ago
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#!/usr/bin/perl
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#
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# This tool is meant to be run from the command line and lets a user purge all information about a given host
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# from the databases.
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#
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# Exit codes;
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# 0 = Normal exit.
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# 1 = User's answer to which machine to purge was invalid.
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# 2 = The passed-in (or selected) host UUID (no longer) exists.
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# 3 = User did not confirm to proceed.
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# 4 = Runaway loop detected.
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#
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use strict;
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use warnings;
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use Anvil::Tools;
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use Data::Dumper;
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use Curses::UI;
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my $THIS_FILE = ($0 =~ /^.*\/(.*)$/)[0];
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my $running_directory = ($0 =~ /^(.*?)\/$THIS_FILE$/)[0];
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if (($running_directory =~ /^\./) && ($ENV{PWD}))
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{
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$running_directory =~ s/^\./$ENV{PWD}/;
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}
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# Turn off buffering so that the pinwheel will display while waiting for the SSH call(s) to complete.
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$| = 1;
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my $anvil = Anvil::Tools->new({debug => 2});
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$anvil->Log->secure({set => 1});
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$anvil->Log->level({set => 2});
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$anvil->Database->connect({debug => 3});
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$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 2, secure => 0, key => "log_0132"});
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# First, ask the user to select a host.
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$anvil->data->{switches}{'host-uuid'} = "" if not defined $anvil->data->{switches}{'host-uuid'};
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 'switches::host-uuid' => $anvil->data->{switches}{'host-uuid'} }});
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$anvil->Database->get_hosts();
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# Ask the user to pick a host.
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pick_host($anvil);
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# Ask the user to confirm.
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confirm($anvil);
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# If we're alive, purge.
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purge($anvil);
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$anvil->nice_exit({code => 0});
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#############################################################################################################
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# Functions #
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#############################################################################################################
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sub purge
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{
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my ($anvil) = @_;
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# Read in all constraints and create a hash of what depends on what, then delete anything referencing
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# hosts without any further references. As each delete is done, delete it. Loop until all entries are
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# gone.
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# Load all the known tables in the DB.
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my $query = "SELECT schemaname||'.'||tablename AS table_name FROM pg_catalog.pg_tables WHERE schemaname = 'history' ORDER BY tablename ASC, schemaname ASC;";
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
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my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
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my $count = @{$results};
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => {
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results => $results,
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count => $count,
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}});
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foreach my $row (@{$results})
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{
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my $table_name = $row->[0];
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$anvil->data->{sql}{history_tables}{$table_name} = 1;
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { "sql::history_tables::${table_name}" => $anvil->data->{sql}{history_tables}{$table_name} }});
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}
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undef $query;
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undef $results;
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undef $count;
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### NOTE: Credit for this query goes to:
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### - https://stackoverflow.com/questions/1152260/postgres-sql-to-list-table-foreign-keys
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$query = "
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SELECT
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tc.table_schema||'.'||tc.table_name AS table,
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kcu.column_name,
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ccu.table_schema||'.'||ccu.table_name AS foreign_table,
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ccu.column_name AS foreign_column_name
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FROM
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information_schema.table_constraints AS tc
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JOIN information_schema.key_column_usage AS kcu
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ON tc.constraint_name = kcu.constraint_name
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AND tc.table_schema = kcu.table_schema
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JOIN information_schema.constraint_column_usage AS ccu
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ON ccu.constraint_name = tc.constraint_name
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AND ccu.table_schema = tc.table_schema
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WHERE
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tc.constraint_type = 'FOREIGN KEY'
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AND
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ccu.column_name = 'host_uuid'
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;";
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
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$results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
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$count = @{$results};
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => {
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results => $results,
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count => $count,
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}});
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foreach my $row (@{$results})
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{
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my $table_name = $row->[0];
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my $column_name = $row->[1];
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my $foreign_table_name = $row->[2];
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my $foreign_column_name = $row->[3];
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => {
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's1:table_name' => $table_name,
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's2:column_name' => $column_name,
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's3:foreign_table_name' => $foreign_table_name,
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's4:foreign_column_name' => $foreign_column_name,
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}});
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if (not exists $anvil->data->{sql}{table}{$table_name})
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{
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$anvil->data->{sql}{table}{$table_name}{column} = $column_name;
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { "sql::table::${table_name}::column" => $anvil->data->{sql}{table}{$table_name}{column} }});
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}
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if (not exists $anvil->data->{sql}{table}{$foreign_table_name})
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{
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$anvil->data->{sql}{table}{$foreign_table_name}{column} = $foreign_column_name;
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { "sql::table::${foreign_table_name}::column" => $anvil->data->{sql}{table}{$foreign_table_name}{column} }});
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}
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$anvil->data->{sql}{table}{$foreign_table_name}{referenced_by}{$table_name} = 1;
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}
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my $loops = 20;
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my $loop = 0;
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my $done = 0;
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my $queries = [];
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until($done)
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{
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$loop++;
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foreach my $table_name (sort {$a cmp $b} keys %{$anvil->data->{sql}{table}})
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{
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my $count = exists $anvil->data->{sql}{table}{$table_name}{referenced_by} ? keys %{$anvil->data->{sql}{table}{$table_name}{referenced_by}} : 0;
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#print "-- Table: [".$table_name."] is referenced by: [".$count."] foreign table(s);\n";
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if (not $count)
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{
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# If there is a corresponding history table, delete it as well.
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my $column = $anvil->data->{sql}{table}{$table_name}{column};
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my $history_table = $table_name;
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$history_table =~ s/^public\./history\./;
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if (exists $anvil->data->{sql}{history_tables}{$history_table})
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{
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push @{$queries}, "DELETE FROM ".$history_table." WHERE ".$column." = ".$anvil->Database->quote($anvil->data->{switches}{'host-uuid'}).";";
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}
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# Now delete the public table entries.
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push @{$queries}, "DELETE FROM ".$table_name." WHERE ".$column." = ".$anvil->Database->quote($anvil->data->{switches}{'host-uuid'}).";";
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foreach my $foreign_table_name (sort {$a cmp $b} keys %{$anvil->data->{sql}{table}})
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{
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if (exists $anvil->data->{sql}{table}{$foreign_table_name}{referenced_by}{$table_name})
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{
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#print "-- Deleting: [".$foreign_table_name."] reference to: [".$table_name."]\n";
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delete $anvil->data->{sql}{table}{$foreign_table_name}{referenced_by}{$table_name};
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}
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}
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#print "-- Deleting hash entry for: [".$table_name."]\n";
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delete $anvil->data->{sql}{table}{$table_name};
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}
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}
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my $remaining = keys %{$anvil->data->{sql}{table}};
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { remaining => $remaining }});
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if (not $remaining)
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{
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$done = 1;
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}
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elsif ($loop > $loops)
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{
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print "Run-away loop detected, aborting!\n";
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$anvil->nice_exit({code => 4});
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}
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}
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# Do the deed.
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$anvil->Database->write({debug => 2, query => $queries, source => $THIS_FILE, line => __LINE__});
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my $host_uuid = $anvil->data->{switches}{'host-uuid'};
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print $anvil->Words->string({key => "message_0176", variables => { host_name => $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_name} }})."\n";
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return(0);
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}
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sub confirm
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{
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my ($anvil) = @_;
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# Normalize -y
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$anvil->data->{switches}{'y'} = "" if not defined $anvil->data->{switches}{'y'};
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$anvil->data->{switches}{'yes'} = "" if not defined $anvil->data->{switches}{'yes'};
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$anvil->data->{switches}{'Y'} = "" if not defined $anvil->data->{switches}{'Y'};
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$anvil->data->{switches}{'Yes'} = "" if not defined $anvil->data->{switches}{'Yes'};
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$anvil->data->{switches}{'YES'} = "" if not defined $anvil->data->{switches}{'YES'};
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if (not $anvil->data->{switches}{'y'})
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{
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if ($anvil->data->{switches}{'yes'}) { $anvil->data->{switches}{'y'} = $anvil->data->{switches}{'yes'}; }
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elsif ($anvil->data->{switches}{'Y'}) { $anvil->data->{switches}{'y'} = $anvil->data->{switches}{'Y'}; }
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elsif ($anvil->data->{switches}{'Yes'}) { $anvil->data->{switches}{'y'} = $anvil->data->{switches}{'Yes'}; }
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elsif ($anvil->data->{switches}{'YES'}) { $anvil->data->{switches}{'y'} = $anvil->data->{switches}{'YES'}; }
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}
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# Ask to confirm, is sane and not -y
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my $host_uuid = $anvil->data->{switches}{'host-uuid'};
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if (not exists $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_name})
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{
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print $anvil->Words->string({key => "error_0131", variables => { host_uuid => $host_uuid }})."\n\n";
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$anvil->nice_exit({code => 2});
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}
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else
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{
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print $anvil->Words->string({key => "message_0172"})."\n\n";
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print $anvil->Words->string({key => "message_0173", variables => {
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host_name => $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_name},
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host_uuid => $host_uuid,
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}})."\n";
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 'switches::y' => $anvil->data->{switches}{'y'} }});
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if ($anvil->data->{switches}{'y'} eq "#!SET!#")
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{
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# Already confirmed.
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print $anvil->Words->string({key => "message_0023"})."\n\n";
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return(0);
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}
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print $anvil->Words->string({key => "message_0021"})." ";
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chomp(my $answer = <STDIN>);
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if ($answer =~ /^y/i)
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{
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# Proceed.
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print $anvil->Words->string({key => "message_0175"})."\n";
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}
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else
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{
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# Abort.
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print $anvil->Words->string({key => "message_0022"})."\n";
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$anvil->nice_exit({code => 3});
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}
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}
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return(0);
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}
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sub pick_host
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{
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my ($anvil) = @_;
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return(0) if $anvil->data->{switches}{'host-uuid'};
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# Get a list of hosts
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my $i = 1;
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my $select = {};
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my $host_length = 0;
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my $type_length = 0;
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foreach my $host_name (sort {$a cmp $b} keys %{$anvil->data->{sys}{hosts}{by_name}})
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{
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my $host_uuid = $anvil->data->{sys}{hosts}{by_name}{$host_name};
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my $host_type = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_type};
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my $anvil_name = defined $anvil->data->{hosts}{host_uuid}{$host_uuid}{anvil_name} ? $anvil->data->{hosts}{host_uuid}{$host_uuid}{anvil_name} : "";
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my $say_type = $anvil->Words->string({key => "brand_0009"});
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if ($host_type eq "striker") { $say_type = $anvil->Words->string({key => "brand_0003"}); }
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elsif ($host_type eq "node") { $say_type = $anvil->Words->string({key => "brand_0007"}); }
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elsif ($host_type eq "dr") { $say_type = $anvil->Words->string({key => "brand_0008"}); }
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if (length($host_name) > $host_length) { $host_length = length($host_name); }
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if (length($say_type) > $type_length) { $type_length = length($say_type); }
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# This is used to build the menu.
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$select->{$i}{host_uuid} = $host_uuid;
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$select->{$i}{host_name} = $host_name;
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$select->{$i}{host_type} = $host_type;
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$select->{$i}{say_type} = $say_type;
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$select->{$i}{anvil_name} = $anvil_name;
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$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => {
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"${i}::host_uuid" => $select->{$i}{host_uuid},
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"${i}::host_name" => $select->{$i}{host_name},
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"${i}::host_type" => $select->{$i}{host_type},
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"${i}::anvil_name" => $select->{$i}{anvil_name},
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}});
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$i++;
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}
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my $pad = $i > 9 ? 2 : 1;
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print $anvil->Words->string({key => "message_0169"})."\n\n";
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foreach my $i (sort {$a cmp $b} keys %{$select})
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{
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print " ".$anvil->Words->string({key => "message_0170", variables => {
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key => sprintf("%".$pad."s", $i),
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type => sprintf("%-".$type_length."s", $select->{$i}{say_type}),
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host_name => sprintf("%-".$host_length."s", $select->{$i}{host_name}),
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host_uuid => $select->{$i}{host_uuid},
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}})."\n";
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}
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print "\n".$anvil->Words->string({key => "message_0171"})." ";
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chomp(my $answer = <STDIN>);
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if (not exists $select->{$answer}{host_name})
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{
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print "\n".$anvil->Words->string({key => "error_0130", variables => { answer => $answer }})."\n\n";
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$anvil->nice_exit({code => 1});
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}
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else
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{
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print "\n";
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$anvil->data->{switches}{'host-uuid'} = $select->{$answer}{host_uuid};
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}
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return(0);
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}
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