Add IBM Instana Exporter (open-telemetry#378)

* Initial commit to add Instana exporter

* Fixed phan

* Updated Readme and composer.json

* Ignoring PhanUndeclaredClassAttribute error for overriden functions

* Ignoring PhanUndeclaredClassAttribute error for overriden functions

* Fixing service_name testcase

* Addressed review comments

* Updated readme

* Fixed phan error

* Addressed review comments around formatting

* Added suggestions in README

Author: HeenaBansal20

.github/workflows/php.yml

@@ -22,6 +22,7 @@ jobs:
         project: [
           'Aws',
           'Context/Swoole',
+          'Exporter/Instana',
           'Instrumentation/AwsSdk',
           'Instrumentation/CakePHP',
           'Instrumentation/CodeIgniter',

.gitsplit.yml

@@ -10,6 +10,8 @@ splits:
     target: "https://${GH_TOKEN}@github.com/opentelemetry-php/opentelemetry-meta.git"
   - prefix: "src/Aws"
     target: "https://${GH_TOKEN}@github.com/opentelemetry-php/contrib-aws.git"
+  - prefix: "src/Exporter/Instana"
+    target: "https://${GH_TOKEN}@github.com/opentelemetry-php/contrib-exporter-instana.git"
   - prefix: "src/Symfony"
     target: "https://${GH_TOKEN}@github.com/opentelemetry-php/contrib-sdk-bundle.git"
   - prefix: "src/Instrumentation/CodeIgniter"

composer.json

@@ -17,6 +17,7 @@
     "psr-4": {
       "OpenTelemetry\\Contrib\\Aws\\": "src/Aws/src",
       "OpenTelemetry\\Contrib\\Context\\Swoole\\": "src/Context/Swoole/src",
+      "OpenTelemetry\\Contrib\\Exporter\\Instana\\": "src/Exporter/Instana/src",
       "OpenTelemetry\\Contrib\\Instrumentation\\CakePHP\\": "src/Instrumentation/CakePHP/src",
       "OpenTelemetry\\Contrib\\Instrumentation\\CodeIgniter\\": "src/Instrumentation/CodeIgniter/src",
       "OpenTelemetry\\Contrib\\Instrumentation\\Curl\\": "src/Instrumentation/Curl/src",
@@ -93,6 +94,7 @@
     "open-telemetry/opentelemetry-auto-codeigniter": "self.version",
     "open-telemetry/opentelemetry-auto-curl": "self.version",
     "open-telemetry/opentelemetry-auto-ext-amqp": "self.version",
+    "open-telemetry/opentelemetry-exporter-instana": "self.version",
     "open-telemetry/opentelemetry-auto-ext-rdkafka": "self.version",
     "open-telemetry/opentelemetry-auto-guzzle": "self.version",
     "open-telemetry/opentelemetry-auto-http-async": "self.version",

src/Exporter/Instana/.gitattributes

@@ -0,0 +1,13 @@
+* text=auto
+
+*.md diff=markdown
+*.php diff=php
+
+/.gitattributes export-ignore
+/.gitignore export-ignore
+/.php-cs-fixer.php export-ignore
+/phpstan.neon.dist export-ignore
+/phpunit.xml.dist export-ignore
+/psalm.xml.dist export-ignore
+/tests export-ignore
+/.phan/ export-ignore

src/Exporter/Instana/.gitignore

@@ -0,0 +1 @@
+/vendor/