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Add some version/env sanity checks to 'arc'
Summary: A user filed an issue on GitHub about not having 'json_decode()': https://github.com/facebook/arcanist/issues/10 Detect this issue and raise a detailed error message. Test Plan: - Set minimum version to 6.0.0, arc told me to upgrade. - Changed function/flag configuration and hit the flag and no-flag error pathways. Reviewers: btrahan, jungejason, rm Reviewed By: rm CC: aran, rm, epriestley Differential Revision: https://secure.phabricator.com/D1267
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@ -17,6 +17,8 @@
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* limitations under the License.
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*/
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sanity_check_environment();
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require_once dirname(__FILE__).'/__init_script__.php';
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phutil_require_module('phutil', 'conduit/client');
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@ -287,3 +289,73 @@ try {
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exit(1);
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}
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/**
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* Perform some sanity checks against the possible diversity of PHP builds in
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* the wild, like very old versions and builds that were compiled with flags
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* that exclude core functionality.
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*/
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function sanity_check_environment() {
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$min_version = '5.2.0';
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$cur_version = phpversion();
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if (version_compare($cur_version, $min_version, '<')) {
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die_with_bad_php(
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"You are running PHP version '{$cur_version}', which is older than ".
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"the minimum version, '{$min_version}'. Update to at least ".
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"'{$min_version}'.");
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}
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$need_functions = array(
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'json_decode' => '--without-json',
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);
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$problems = array();
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$config = null;
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$show_config = false;
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foreach ($need_functions as $fname => $flag) {
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if (function_exists($fname)) {
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continue;
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}
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static $info;
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if ($info === null) {
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ob_start();
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phpinfo(INFO_GENERAL);
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$info = ob_get_clean();
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$matches = null;
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if (preg_match('/^Configure Command =>\s*(.*?)$/m', $info, $matches)) {
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$config = $matches[1];
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}
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}
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if (strpos($config, $flag) !== false) {
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$show_config = true;
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$problems[] =
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"This build of PHP was compiled with the configure flag '{$flag}', ".
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"which means it does not have the function '{$fname}()'. This ".
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"function is required for arc to run. Rebuild PHP without this flag. ".
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"You may also be able to build or install the relevant extension ".
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"separately.";
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} else {
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$problems[] =
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"This build of PHP is missing the required function '{$fname}()'. ".
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"Rebuild PHP or install the extension which provides '{$fname}()'.";
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}
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}
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if ($problems) {
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if ($show_config) {
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$problems[] = "PHP was built with this configure command:\n\n{$config}";
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}
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die_with_bad_php(implode("\n\n", $problems));
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}
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}
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function die_with_bad_php($message) {
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echo "\nPHP CONFIGURATION ERRORS\n\n";
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echo $message;
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echo "\n\n";
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exit(1);
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}
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