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Implement Overall Task Context in Code Completion for Better Accuracy #487

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Apr 14, 2024
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Implement Overall Task Context in Code Completion for Better Accuracy #487

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49 changes: 48 additions & 1 deletion src/contributes/codecomplete/promptCreator.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
*/

import * as fs from 'fs/promises';
import * as fsF from 'fs';
import * as path from 'path';
import { logger } from "../../util/logger";
import { getAst, getAstNodeByRange, getTreePathAtCursor, RangeInFileWithContents } from "./ast/ast";
Expand Down Expand Up @@ -507,9 +508,35 @@ export async function findNeighborFileContext(filePath: string, fileContent: str
}
}

// create code task description as code completion context
export async function createTaskDescriptionContext() {
// task description is store in <WORKSPACEDIR>/.chat/complete.config, this config file
// is store as JSON format, and task description is store in "taskDescription" field as string
const workspacePath = UiUtilWrapper.workspaceFoldersFirstPath();
if (!workspacePath) {
return "";
}

const completeConfigPath = path.join(workspacePath, '.chat', 'complete.config');
if (!fsF.existsSync(completeConfigPath)) {
return "";
}

const completeConfig = JSON.parse(fsF.readFileSync(completeConfigPath, { encoding: 'utf8' }));
if (!completeConfig.taskDescription) {
return "";
}

return completeConfig.taskDescription;
}

export async function createPrompt(filePath: string, fileContent: string, line: number, column: number, posoffset: number, recentEdits: RecentEdit[]) {
const commentPrefix = await getCommentPrefix(filePath);

const taskDescriptionContext = await createTaskDescriptionContext();
// taskDescriptionContext is multi lines description, so we need add commentPrefix before each line


let { prefix, suffix } = await currentFileContext(filePath, fileContent, line, column);

let tokenCount = countTokens(prefix);
Expand All @@ -521,6 +548,26 @@ export async function createPrompt(filePath: string, fileContent: string, line:
suffix = "";
}

let taskDescriptionContextWithCommentPrefix = "";
if (tokenCount < CONTEXT_LIMITED_SIZE) {
const taskDescriptionContext = await createTaskDescriptionContext();
// taskDescriptionContext is multi lines description, so we need add commentPrefix before each line
if (taskDescriptionContext) {
taskDescriptionContext.split("\n").forEach(line => {
taskDescriptionContextWithCommentPrefix += `${commentPrefix}${line}\n`;
});

taskDescriptionContextWithCommentPrefix += "\n\n\n\n";
}

const taskDescriptionContextToken = countTokens(taskDescriptionContextWithCommentPrefix);
if (tokenCount + taskDescriptionContextToken < CONTEXT_LIMITED_SIZE) {
tokenCount += taskDescriptionContextToken;
} else {
taskDescriptionContextWithCommentPrefix = "";
}
}

let callDefContext = "";
if (tokenCount < CONTEXT_LIMITED_SIZE) {
const callCodeBlocks = await createContextCallDefine(filePath, fileContent, posoffset);
Expand Down Expand Up @@ -599,7 +646,7 @@ export async function createPrompt(filePath: string, fileContent: string, line:

logger.channel()?.info("Complete token:", tokenCount);

const prompt = "<fim_prefix>" + neighborFileContext + recentEditContext + symbolContext + callDefContext + similarBlockContext + `${commentPrefix}${filePath}\n\n` + prefix + "<fim_suffix>" + suffix + "<fim_middle>";
const prompt = "<fim_prefix>" + taskDescriptionContextWithCommentPrefix + neighborFileContext + recentEditContext + symbolContext + callDefContext + similarBlockContext + `${commentPrefix}${filePath}\n\n` + prefix + "<fim_suffix>" + suffix + "<fim_middle>";
return prompt;
}

Expand Down