feat(completion): improve built-in agent support for file and revision references #101

The completion system for the DevInT language has been enhanced to provide better support for built-in agents. Specifically, the completion provider now uses the `BuiltinAgent.FILE` and `BuiltinAgent.REV` constants instead of hard-coded strings, which improves maintainability and reduces the likelihood of typos. Additionally, the `RevisionReferenceLanguageProvider` has been updated to retrieve commits by their file changes instead of by revision, which aligns better with the new agent naming scheme and provides a more intuitive completion experience for users.

Author: phodal

exts/devin-lang/src/main/kotlin/cc/unitmesh/devti/language/DevInCompletionContributor.kt

@@ -20,12 +20,12 @@ class DevInCompletionContributor : CompletionContributor() {
         extend(CompletionType.BASIC, PlatformPatterns.psiElement(DevInTypes.AGENT_ID), BuiltinAgentProvider())
         extend(
             CompletionType.BASIC,
-            valuePattern(FileReferenceLanguageProvider.FILE_REF_TYPE),
+            valuePattern(BuiltinAgent.FILE.agentName),
             FileReferenceLanguageProvider()
         )
         extend(
             CompletionType.BASIC,
-            valuePattern(RevisionReferenceLanguageProvider.REV_REF_TYPE),
+            valuePattern(BuiltinAgent.REV.agentName),
             RevisionReferenceLanguageProvider()
         )
     }

exts/devin-lang/src/main/kotlin/cc/unitmesh/devti/language/completion/BuiltinAgentProvider.kt

@@ -7,7 +7,7 @@ import com.intellij.util.ProcessingContext
 
 enum class BuiltinAgent(val agentName: String, val description: String) {
     FILE("file", "Read the content of a file"),
-    REV("rev", "Read git change by revision"),
+    REV("rev", "Read git change by file"),
     SYMBOL("symbol", "Read content by Java/Kotlin canonicalName"),
     WRITE("write", "Write content to a file, format: /write:/path/to/file:L1-C2"),
     ;

exts/devin-lang/src/main/kotlin/cc/unitmesh/devti/language/completion/RevisionReferenceLanguageProvider.kt

@@ -8,17 +8,11 @@ import com.intellij.icons.AllIcons
 import com.intellij.openapi.project.Project
 import com.intellij.util.ProcessingContext
 import git4idea.GitCommit
-import git4idea.GitIcons
 import git4idea.history.GitHistoryUtils
 import git4idea.repo.GitRepositoryManager
-import git4idea.ui.branch.BranchIconUtil
 
 
 class RevisionReferenceLanguageProvider : CompletionProvider<CompletionParameters>() {
-    companion object {
-        const val REV_REF_TYPE = "rev"
-    }
-
     override fun addCompletions(
         parameters: CompletionParameters,
         context: ProcessingContext,
@@ -27,18 +21,18 @@ class RevisionReferenceLanguageProvider : CompletionProvider<CompletionParameter
         val project: Project = parameters.editor.project ?: return
         val repository = GitRepositoryManager.getInstance(project).repositories.firstOrNull() ?: return
         val branchName = repository.currentBranchName
-        val commits: List<GitCommit> = GitHistoryUtils.history(project, repository.root, branchName)
 
-        commits.forEach {
-            try {
+        try {
+            val commits: List<GitCommit> = GitHistoryUtils.history(project, repository.root, branchName)
+            commits.forEach {
                 val element = LookupElementBuilder.create(it.fullMessage)
                     .withIcon(AllIcons.Vcs.Branch)
                     .withTypeText(it.id.toShortString(), true)
 
                 result.addElement(element)
-            } catch (e: Exception) {
-//                e.printStackTrace()
             }
+        } catch (e: Exception) {
+//                e.printStackTrace()
         }
     }
 }