refactor(pub): Only use a single shared YAML instance

Signed-off-by: Sebastian Schuberth <[email protected]>

plugins/package-managers/pub/src/main/kotlin/model/Lockfile.kt

@@ -19,8 +19,6 @@
 
 package org.ossreviewtoolkit.plugins.packagemanagers.pub.model
 
-import com.charleskorn.kaml.Yaml
-import com.charleskorn.kaml.YamlConfiguration
 import com.charleskorn.kaml.YamlInput
 import com.charleskorn.kaml.YamlScalar
 
@@ -41,8 +39,6 @@ import kotlinx.serialization.encoding.Decoder
 
 import org.ossreviewtoolkit.plugins.packagemanagers.pub.model.PackageInfo.Description
 
-private val YAML = Yaml(configuration = YamlConfiguration(strictMode = false))
-
 internal fun parseLockfile(lockfile: File) = YAML.decodeFromString<Lockfile>(lockfile.readText())
 
 /**

plugins/package-managers/pub/src/main/kotlin/model/Pubspec.kt

@@ -19,8 +19,6 @@
 
 package org.ossreviewtoolkit.plugins.packagemanagers.pub.model
 
-import com.charleskorn.kaml.Yaml
-import com.charleskorn.kaml.YamlConfiguration
 import com.charleskorn.kaml.YamlInput
 import com.charleskorn.kaml.YamlMap
 import com.charleskorn.kaml.YamlNode
@@ -44,8 +42,6 @@ import org.ossreviewtoolkit.plugins.packagemanagers.pub.model.Pubspec.HostedDepe
 import org.ossreviewtoolkit.plugins.packagemanagers.pub.model.Pubspec.PathDependency
 import org.ossreviewtoolkit.plugins.packagemanagers.pub.model.Pubspec.SdkDependency
 
-private val YAML = Yaml(configuration = YamlConfiguration(strictMode = false))
-
 internal fun parsePubspec(pubspecFile: File): Pubspec = parsePubspec(pubspecFile.readText())
 
 internal fun parsePubspec(pubspecYaml: String): Pubspec = YAML.decodeFromString(pubspecYaml)

plugins/package-managers/pub/src/main/kotlin/model/Yaml.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2024 The ORT Project Authors (see <https://github.com/oss-review-toolkit/ort/blob/main/NOTICE>)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * License-Filename: LICENSE
+ */
+
+package org.ossreviewtoolkit.plugins.packagemanagers.pub.model
+
+import com.charleskorn.kaml.Yaml
+import com.charleskorn.kaml.YamlConfiguration
+
+internal val YAML = Yaml(configuration = YamlConfiguration(strictMode = false))