5 files changed, 182 insertions, 0 deletions
diff --git a/vendor/open-telemetry/sdk/Common/Configuration/Resolver/CompositeResolver.php b/vendor/open-telemetry/sdk/Common/Configuration/Resolver/CompositeResolver.php
new file mode 100644
index 000000000..b72400b01
--- /dev/null
+++ b/vendor/open-telemetry/sdk/Common/Configuration/Resolver/CompositeResolver.php
@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\SDK\Common\Configuration\Resolver;
+
+use OpenTelemetry\SDK\Common\Configuration\Configuration;
+
+/**
+ * @interal
+ */
+class CompositeResolver
+{
+    // @var array<ResolverInterface>
+    private array $resolvers = [];
+
+    public static function instance(): self
+    {
+        static $instance;
+        $instance ??= new self([
+            new PhpIniResolver(),
+            new EnvironmentResolver(),
+        ]);
+
+        return $instance;
+    }
+
+    public function __construct($resolvers)
+    {
+        foreach ($resolvers as $resolver) {
+            $this->addResolver($resolver);
+        }
+    }
+
+    public function addResolver(ResolverInterface $resolver): void
+    {
+        $this->resolvers[] = $resolver;
+    }
+
+    public function getResolvers(): array
+    {
+        return $this->resolvers;
+    }
+
+    public function resolve(string $variableName, $default = '')
+    {
+        foreach ($this->resolvers as $resolver) {
+            if ($resolver->hasVariable($variableName)) {
+                return $resolver->retrieveValue($variableName);
+            }
+        }
+
+        return Configuration::isEmpty($default)
+            ? Configuration::getDefault($variableName)
+            : $default;
+    }
+
+    public function hasVariable(string $variableName): bool
+    {
+        foreach ($this->resolvers as $resolver) {
+            if ($resolver->hasVariable($variableName)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
diff --git a/vendor/open-telemetry/sdk/Common/Configuration/Resolver/EnvironmentResolver.php b/vendor/open-telemetry/sdk/Common/Configuration/Resolver/EnvironmentResolver.php
new file mode 100644
index 000000000..453f98e39
--- /dev/null
+++ b/vendor/open-telemetry/sdk/Common/Configuration/Resolver/EnvironmentResolver.php
@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\SDK\Common\Configuration\Resolver;
+
+use OpenTelemetry\SDK\Common\Configuration\Configuration;
+
+/**
+ * @internal
+ */
+class EnvironmentResolver implements ResolverInterface
+{
+    public function hasVariable(string $variableName): bool
+    {
+        if (!Configuration::isEmpty($_SERVER[$variableName] ?? null)) {
+            return true;
+        }
+        $env = getenv($variableName);
+        if ($env === false) {
+            return false;
+        }
+
+        return !Configuration::isEmpty($env);
+    }
+
+    /**
+     * @psalm-suppress InvalidReturnStatement
+     * @psalm-suppress InvalidReturnType
+     */
+    public function retrieveValue(string $variableName)
+    {
+        $value = getenv($variableName);
+        if ($value === false) {
+            $value = $_SERVER[$variableName] ?? null;
+        }
+
+        return $value;
+    }
+}
diff --git a/vendor/open-telemetry/sdk/Common/Configuration/Resolver/PhpIniAccessor.php b/vendor/open-telemetry/sdk/Common/Configuration/Resolver/PhpIniAccessor.php
new file mode 100644
index 000000000..a12b507e8
--- /dev/null
+++ b/vendor/open-telemetry/sdk/Common/Configuration/Resolver/PhpIniAccessor.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\SDK\Common\Configuration\Resolver;
+
+class PhpIniAccessor
+{
+    /**
+     * Mockable accessor for php.ini values
+     * @internal
+     * @return array|false|string
+     */
+    public function get(string $variableName)
+    {
+        return get_cfg_var($variableName);
+    }
+}
diff --git a/vendor/open-telemetry/sdk/Common/Configuration/Resolver/PhpIniResolver.php b/vendor/open-telemetry/sdk/Common/Configuration/Resolver/PhpIniResolver.php
new file mode 100644
index 000000000..c9a8f3b4e
--- /dev/null
+++ b/vendor/open-telemetry/sdk/Common/Configuration/Resolver/PhpIniResolver.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\SDK\Common\Configuration\Resolver;
+
+use OpenTelemetry\SDK\Common\Configuration\Configuration;
+
+/**
+ * @interal
+ * @psalm-suppress TypeDoesNotContainType
+ */
+class PhpIniResolver implements ResolverInterface
+{
+    private PhpIniAccessor $accessor;
+
+    public function __construct(?PhpIniAccessor $accessor = null)
+    {
+        $this->accessor = $accessor ?? new PhpIniAccessor();
+    }
+
+    public function retrieveValue(string $variableName)
+    {
+        $value = $this->accessor->get($variableName) ?: '';
+        if (is_array($value)) {
+            return implode(',', $value);
+        }
+
+        return $value;
+    }
+
+    public function hasVariable(string $variableName): bool
+    {
+        $value = $this->accessor->get($variableName);
+        if ($value === []) {
+            return false;
+        }
+
+        return $value !== false && !Configuration::isEmpty($value);
+    }
+}
diff --git a/vendor/open-telemetry/sdk/Common/Configuration/Resolver/ResolverInterface.php b/vendor/open-telemetry/sdk/Common/Configuration/Resolver/ResolverInterface.php
new file mode 100644
index 000000000..4e88f3ff6
--- /dev/null
+++ b/vendor/open-telemetry/sdk/Common/Configuration/Resolver/ResolverInterface.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\SDK\Common\Configuration\Resolver;
+
+interface ResolverInterface
+{
+    /**
+     * @return mixed
+     */
+    public function retrieveValue(string $variableName);
+
+    public function hasVariable(string $variableName): bool;
+}