Initial Commit ~~~~=[,,_____,,]:3

.gitignore

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+composer.lock
+vendor
+.idea

composer.json

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+{
+	"require": {
+		"symfony/console": "~2.7"
+	},
+	"autoload": {
+		"psr-4": {
+			"GraphiteBackup\\": "src/"
+		}
+	}
+}

data/.gitignore

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+*

graback.php

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+<?php
+
+require_once __DIR__ . '/vendor/autoload.php';
+
+$app = new Symfony\Component\Console\Application( 'graphite-backup' );
+
+$app->addCommands( array(
+	new GraphiteBackup\Console\Command\BackupCommand(),
+) );
+
+$app->setDefaultCommand( 'backup' );
+$app->run();

src/Console/Command/BackupCommand.php

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+<?php
+
+namespace GraphiteBackup\Console\Command;
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class BackupCommand extends Command {
+
+	protected function configure() {
+		$this
+			->setName( 'backup' )
+			->setDescription( 'Back up a target into local files.' )
+			->addArgument(
+				'target',
+				InputArgument::REQUIRED,
+				'Which target do you want to backup?'
+			);
+	}
+
+	protected function execute( InputInterface $input, OutputInterface $output ) {
+		$targetInput = $input->getArgument( 'target' );
+		$output->writeln( "Getting $targetInput" );
+
+		$data = $this->getDataForTarget( $targetInput );
+
+		if ( empty( $data ) ) {
+			$output->writeln( "Empty target, no backup made." );
+
+			return;
+		}
+
+		foreach ( $data as $targetData ) {
+			$metric = $targetData['target'];
+			$output->writeln( "Backing up $metric" );
+			$dataPoints = $targetData['datapoints'];
+			$file = $this->getDataPath( $metric );
+
+			// Note: Loading this could start using lots of memory?
+			$currentFileContents = file_get_contents( $file );
+			if ( $currentFileContents === false ) {
+				$currentFileContents = '';
+			}
+
+			$dataPointsAdded = 0;
+			$dataPointsSkipped = 0;
+
+			foreach ( $dataPoints as $dataPoint ) {
+				list( $value, $timestamp ) = $dataPoint;
+				$stringToAdd = $timestamp . ' ' . $value . "\n";
+
+				// Don't write the line if we already have an exact duplicate
+				if ( strpos( $currentFileContents, $stringToAdd ) !== false ) {
+					$dataPointsSkipped++;
+					continue;
+				}
+
+				// Write the metric to the file
+				$success = file_put_contents( $file, $stringToAdd, FILE_APPEND );
+				$dataPointsAdded++;
+				if ( $success === false ) {
+					$output->writeln( "Failed to write to file." );
+					return;
+				}
+			}
+
+
+			$output->writeln( "$dataPointsAdded new points, $dataPointsSkipped skipped points." );
+		}
+
+		$output->writeln( "Done." );
+	}
+
+	private function getDataPath( $metric ) {
+		return $this->getDataDirectory() . $metric . '.txt';
+	}
+
+	private function getDataDirectory() {
+		return dirname( dirname( dirname( __DIR__ ) ) ) .
+		DIRECTORY_SEPARATOR .
+		'data' .
+		DIRECTORY_SEPARATOR;
+	}
+
+	private function getDataForTarget( $target ) {
+		$json = file_get_contents( $this->getApiUrl( $target ) );
+
+		return json_decode( $json, true );
+	}
+
+	private function getApiUrl( $target ) {
+		return "https://graphite.wikimedia.org/render/?target=$target&format=json";
+	}
+
+}