refactor: use static instance getters for services

This adheres to the SDK convention.

Author: lppedd

src/main/kotlin/com/github/lppedd/cc/CCNotificationService.kt

@@ -3,15 +3,19 @@ package com.github.lppedd.cc
 import com.intellij.notification.NotificationGroupManager
 import com.intellij.notification.NotificationType
 import com.intellij.openapi.components.Service
+import com.intellij.openapi.components.service
 import com.intellij.openapi.project.Project
 
 /**
  * @author Edoardo Luppi
  */
 @Service(Service.Level.PROJECT)
 internal class CCNotificationService(private val project: Project) {
-  private companion object {
+  companion object {
     private val group = NotificationGroupManager.getInstance().getNotificationGroup("com.github.lppedd.cc.notifications")
+
+    @JvmStatic
+    fun getInstance(project: Project): CCNotificationService = project.service()
   }
 
   fun notifyError(message: String) {

src/main/kotlin/com/github/lppedd/cc/CCProjectManagerListener.kt

@@ -1,7 +1,6 @@
 package com.github.lppedd.cc
 
 import com.github.lppedd.cc.vcs.commitbuilder.CommitBuilderService
-import com.intellij.openapi.components.service
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.project.ProjectManagerListener
 
@@ -10,5 +9,5 @@ import com.intellij.openapi.project.ProjectManagerListener
  */
 internal class CCProjectManagerListener : ProjectManagerListener {
   override fun projectClosingBeforeSave(project: Project) =
-    project.service<CommitBuilderService>().clear()
+    CommitBuilderService.getInstance(project).clear()
 }

src/main/kotlin/com/github/lppedd/cc/api/CommitInspectionProviderService.kt

@@ -1,9 +1,16 @@
 package com.github.lppedd.cc.api
 
+import com.intellij.openapi.components.service
+
 /**
  * @author Edoardo Luppi
  */
 public interface CommitInspectionProviderService {
+  public companion object {
+    @JvmStatic
+    public fun getInstance(): CommitInspectionProviderService = service()
+  }
+
   /**
    * Returns all the registered commit inspection providers.
    */

src/main/kotlin/com/github/lppedd/cc/api/CommitTokenProviderService.kt

@@ -1,12 +1,19 @@
 package com.github.lppedd.cc.api
 
 import com.intellij.openapi.Disposable
+import com.intellij.openapi.components.service
+import com.intellij.openapi.project.Project
 import org.jetbrains.annotations.TestOnly
 
 /**
  * @author Edoardo Luppi
  */
 public interface CommitTokenProviderService {
+  public companion object {
+    @JvmStatic
+    public fun getInstance(project: Project): CommitTokenProviderService = project.service()
+  }
+
   /**
    * Returns all the registered commit type providers.
    */

src/main/kotlin/com/github/lppedd/cc/api/WhatsNewProviderService.kt

@@ -1,11 +1,15 @@
 package com.github.lppedd.cc.api
 
+import com.intellij.openapi.components.service
+
 /**
  * @author Edoardo Luppi
  */
 public interface WhatsNewProviderService {
-  /**
-   * Returns all the registered "What's new" providers.
-   */
+  public companion object {
+    @JvmStatic
+    public fun getInstance(): WhatsNewProviderService = service()
+  }
+
   public fun getWhatsNewProviders(): Collection<WhatsNewProvider>
 }

src/main/kotlin/com/github/lppedd/cc/api/impl/InternalCommitTokenProvider.kt

@@ -8,7 +8,6 @@ import com.github.lppedd.cc.configuration.CCTokensService
 import com.github.lppedd.cc.configuration.CCTokensService.TokensModel
 import com.github.lppedd.cc.configuration.CoAuthorsResult
 import com.github.lppedd.cc.configuration.TokensResult
-import com.intellij.openapi.components.service
 import com.intellij.openapi.diagnostic.logger
 import com.intellij.openapi.project.Project
 import javax.swing.Icon
@@ -50,7 +49,7 @@ internal class InternalCommitTokenProvider(private val project: Project) :
     subject: String?,
   ): Collection<CommitFooterValue> {
     if ("co-authored-by".equals(footerType, ignoreCase = true)) {
-      val tokensService = project.service<CCTokensService>()
+      val tokensService = CCTokensService.getInstance(project)
 
       when (val result = tokensService.getCoAuthors()) {
         is CoAuthorsResult.Success -> {
@@ -67,7 +66,7 @@ internal class InternalCommitTokenProvider(private val project: Project) :
   }
 
   private fun getTokens(): TokensModel {
-    val tokensService = project.service<CCTokensService>()
+    val tokensService = CCTokensService.getInstance(project)
 
     @Suppress("LoggingSimilarMessage")
     return when (val result = tokensService.getTokens()) {
@@ -80,7 +79,7 @@ internal class InternalCommitTokenProvider(private val project: Project) :
         logger.debug("Error while getting tokens", result.failure)
         val details = CCBundle["cc.notifications.schema.validation"]
         val message = CCBundle["cc.notifications.schema", details]
-        project.service<CCNotificationService>().notifyError(message)
+        CCNotificationService.getInstance(project).notifyError(message)
         tokensService.getBundledTokens()
       }
     }

src/main/kotlin/com/github/lppedd/cc/api/impl/InternalCommitTokenProviderService.kt

@@ -3,7 +3,6 @@ package com.github.lppedd.cc.api.impl
 import com.github.lppedd.cc.api.*
 import com.github.lppedd.cc.configuration.CCConfigService
 import com.intellij.openapi.Disposable
-import com.intellij.openapi.components.service
 import com.intellij.openapi.extensions.ProjectExtensionPointName
 import com.intellij.openapi.project.Project
 import org.jetbrains.annotations.TestOnly
@@ -33,37 +32,37 @@ internal class InternalCommitTokenProviderService(private val project: Project)
   }
 
   override fun getTypeProviders(): List<CommitTypeProvider> {
-    val configService = project.service<CCConfigService>()
+    val configService = CCConfigService.getInstance(project)
     val providers = typeEpName.getExtensions(project)
     return providers.sortedBy(configService::getProviderOrder)
   }
 
   override fun getScopeProviders(): List<CommitScopeProvider> {
-    val configService = project.service<CCConfigService>()
+    val configService = CCConfigService.getInstance(project)
     val providers = scopeEpName.getExtensions(project)
     return providers.sortedBy(configService::getProviderOrder)
   }
 
   override fun getSubjectProviders(): List<CommitSubjectProvider> {
-    val configService = project.service<CCConfigService>()
+    val configService = CCConfigService.getInstance(project)
     val providers = subjectEpName.getExtensions(project)
     return providers.sortedBy(configService::getProviderOrder)
   }
 
   override fun getBodyProviders(): List<CommitBodyProvider> {
-    val configService = project.service<CCConfigService>()
+    val configService = CCConfigService.getInstance(project)
     val providers = bodyEpName.getExtensions(project)
     return providers.sortedBy(configService::getProviderOrder)
   }
 
   override fun getFooterTypeProviders(): List<CommitFooterTypeProvider> {
-    val configService = project.service<CCConfigService>()
+    val configService = CCConfigService.getInstance(project)
     val providers = footerTypeEpName.getExtensions(project)
     return providers.sortedBy(configService::getProviderOrder)
   }
 
   override fun getFooterValueProviders(): List<CommitFooterValueProvider> {
-    val configService = project.service<CCConfigService>()
+    val configService = CCConfigService.getInstance(project)
     val providers = footerValueEpName.getExtensions(project)
     return providers.sortedBy(configService::getProviderOrder)
   }

src/main/kotlin/com/github/lppedd/cc/completion/ConventionalCommitTextCompletionContributor.kt

@@ -24,7 +24,6 @@ import com.intellij.codeInsight.lookup.LookupElement
 import com.intellij.codeInsight.lookup.LookupManagerListener
 import com.intellij.codeInsight.lookup.impl.LookupImpl
 import com.intellij.lang.LanguageMatcher
-import com.intellij.openapi.components.service
 import com.intellij.openapi.fileTypes.PlainTextLanguage
 import com.intellij.openapi.progress.ProgressManager
 import com.intellij.openapi.project.DumbAware
@@ -114,7 +113,7 @@ internal class ConventionalCommitTextCompletionContributor : CompletionContribut
       .withRelevanceSorter(
         CompletionSorter.emptySorter()
           .weigh(PreferStartMatching())
-          .weigh(ConventionalCommitLookupElementWeigher(project.service()))
+          .weigh(ConventionalCommitLookupElementWeigher(CCConfigService.getInstance(project)))
       )
 
     val editor = parameters.editor
@@ -126,7 +125,7 @@ internal class ConventionalCommitTextCompletionContributor : CompletionContribut
       ContextResultSet(resultSet)
     }
 
-    val configService = project.service<CCConfigService>()
+    val configService = CCConfigService.getInstance(project)
     val process = parameters.process
 
     // If the user configured commit messages to be completed via templates,

src/main/kotlin/com/github/lppedd/cc/completion/LookupEnhancer.kt

@@ -26,7 +26,6 @@ import com.intellij.openapi.actionSystem.ex.AnActionListener
 import com.intellij.openapi.actionSystem.impl.ActionButton
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.command.CommandProcessor
-import com.intellij.openapi.components.service
 import com.intellij.openapi.diagnostic.logger
 import com.intellij.openapi.util.Disposer
 import com.intellij.openapi.util.registry.Registry
@@ -51,7 +50,7 @@ internal class LookupEnhancer(private val lookup: LookupImpl) : LookupListener,
 
   private val commandProcessor = CommandProcessor.getInstance()
   private val actionManager = ActionManagerEx.getInstanceEx()
-  private val config = lookup.project.service<CCConfigService>()
+  private val config = CCConfigService.getInstance(lookup.project)
 
   @Volatile private var lookupPopupMenuListenerDisposable: Disposable? = null
   @Volatile private var allActions = emptyList<AnAction>()

src/main/kotlin/com/github/lppedd/cc/completion/menu/SettingsActions.kt

@@ -11,7 +11,6 @@ import com.github.lppedd.cc.updateIcons
 import com.intellij.codeInsight.lookup.impl.LookupImpl
 import com.intellij.icons.AllIcons
 import com.intellij.openapi.actionSystem.*
-import com.intellij.openapi.components.service
 import com.intellij.openapi.project.DumbAware
 import com.intellij.util.ui.UIUtil
 import java.util.*
@@ -26,7 +25,7 @@ internal class SettingsActions(
   private val enhancer: LookupEnhancer,
   private val lookup: LookupImpl,
 ) : ActionGroup("", false), DumbAware {
-  private val config = lookup.project.service<CCConfigService>()
+  private val config = CCConfigService.getInstance(lookup.project)
   private val actions = arrayOf(
     Separator.create(),
     CompletionModeChangeAction(),