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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import * as fs from 'fs/promises';
import * as path from 'path';
import { homedir } from 'os';
import { SETTINGS_DIRECTORY_NAME } from './settings.js';
import {
getErrorMessage,
MemoryTool,
GEMINI_MD_FILENAME,
MEMORY_SECTION_HEADER,
} from '@gemini-code/server';
/**
* Gets the absolute path to the global GEMINI.md file.
*/
export function getGlobalMemoryFilePath(): string {
return path.join(homedir(), SETTINGS_DIRECTORY_NAME, GEMINI_MD_FILENAME);
}
/**
* Adds a new memory entry to the global GEMINI.md file under the specified header.
*/
export async function addMemoryEntry(text: string): Promise<void> {
const filePath = getGlobalMemoryFilePath();
// The performAddMemoryEntry method from MemoryTool will handle its own errors
// and throw an appropriately formatted error if needed.
await MemoryTool.performAddMemoryEntry(text, filePath, {
readFile: fs.readFile,
writeFile: fs.writeFile,
mkdir: fs.mkdir,
});
}
/**
* Deletes the last added memory entry from the "Gemini Added Memories" section.
*/
export async function deleteLastMemoryEntry(): Promise<boolean> {
const filePath = getGlobalMemoryFilePath();
try {
let content = await fs.readFile(filePath, 'utf-8');
const headerIndex = content.indexOf(MEMORY_SECTION_HEADER);
if (headerIndex === -1) return false; // Section not found
const startOfSectionContent = headerIndex + MEMORY_SECTION_HEADER.length;
let endOfSectionIndex = content.indexOf('\n## ', startOfSectionContent);
if (endOfSectionIndex === -1) {
endOfSectionIndex = content.length;
}
const sectionPart = content.substring(
startOfSectionContent,
endOfSectionIndex,
);
const lines = sectionPart.split(/\r?\n/).map((line) => line.trimEnd());
let lastBulletLineIndex = -1;
for (let i = lines.length - 1; i >= 0; i--) {
if (lines[i].trim().startsWith('- ')) {
lastBulletLineIndex = i;
break;
}
}
if (lastBulletLineIndex === -1) return false; // No bullets found in section
lines.splice(lastBulletLineIndex, 1);
const newSectionPart = lines
.filter((line) => line.trim().length > 0)
.join('\n');
const beforeHeader = content.substring(0, headerIndex);
const afterSection = content.substring(endOfSectionIndex);
if (newSectionPart.trim().length === 0) {
// If section is now empty (no bullets), remove header too or leave it clean
// For simplicity, let's leave the header but ensure it has a newline after if content follows
content = `${beforeHeader}${MEMORY_SECTION_HEADER}\n${afterSection}`
.replace(/\n{3,}/g, '\n\n')
.trimEnd();
if (content.length > 0) content += '\n';
} else {
content =
`${beforeHeader}${MEMORY_SECTION_HEADER}\n${newSectionPart}\n${afterSection}`
.replace(/\n{3,}/g, '\n\n')
.trimEnd();
if (content.length > 0) content += '\n';
}
await fs.writeFile(filePath, content, 'utf-8');
return true;
} catch (error) {
if (error instanceof Error && 'code' in error && error.code === 'ENOENT') {
return false;
}
console.error(`Error deleting last memory entry from ${filePath}:`, error);
throw new Error(
`Failed to delete last memory entry: ${getErrorMessage(error)}`,
);
}
}
/**
* Deletes all added memory entries (the entire "Gemini Added Memories" section).
*/
export async function deleteAllAddedMemoryEntries(): Promise<number> {
const filePath = getGlobalMemoryFilePath();
try {
let content = await fs.readFile(filePath, 'utf-8');
const headerIndex = content.indexOf(MEMORY_SECTION_HEADER);
if (headerIndex === -1) return 0; // Section not found
let endOfSectionIndex = content.indexOf(
'\n## ',
headerIndex + MEMORY_SECTION_HEADER.length,
);
if (endOfSectionIndex === -1) {
endOfSectionIndex = content.length; // Section goes to EOF
}
const sectionContent = content.substring(headerIndex, endOfSectionIndex);
const bulletCount = (sectionContent.match(/\n- /g) || []).length;
if (bulletCount === 0 && !sectionContent.includes('- ')) {
// No bullets found
// If we only remove if bullets exist, or remove header if no bullets.
// For now, if header exists but no bullets, consider 0 deleted if we only count bullets.
// If the goal is to remove the section if it exists, this logic changes.
// Let's assume we only care about bulleted items for the count.
}
// Remove the section including the header
const beforeHeader = content.substring(0, headerIndex);
const afterSection = content.substring(endOfSectionIndex);
content = (
beforeHeader.trimEnd() +
(afterSection.length > 0 ? '\n' + afterSection.trimStart() : '')
).trim();
if (content.length > 0) content += '\n';
await fs.writeFile(filePath, content, 'utf-8');
return bulletCount; // This counts '\n- ' occurrences, might need refinement for exact bullet count
} catch (error) {
if (error instanceof Error && 'code' in error && error.code === 'ENOENT') {
return 0;
}
console.error(
`Error deleting all added memory entries from ${filePath}:`,
error,
);
throw new Error(
`Failed to delete all added memory entries: ${getErrorMessage(error)}`,
);
}
}
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