feat(cli-repl): add configuration to set max log files size MONGOSH-1985

Author: gagik

Diff for: packages/cli-repl/src/cli-repl.spec.ts

@@ -324,7 +324,7 @@ describe('CliRepl', function () {
           'disableLogging',
           'logLocation',
           'logRetentionDays',
-          'logMaxFileCount',
+          'logRetentionGB',
         ] satisfies (keyof CliUserConfig)[]);
       });
 
@@ -1452,6 +1452,19 @@ describe('CliRepl', function () {
             );
           });
 
+          it('can set log retention GB', async function () {
+            const testLogRetentionGB = 10;
+            cliRepl.config.logRetentionGB = testLogRetentionGB;
+            await cliRepl.start(await testServer.connectionString(), {});
+
+            expect(cliRepl.getConfig('logRetentionGB')).equals(
+              testLogRetentionGB
+            );
+            expect(cliRepl.logManager?._options.logRetentionGB).equals(
+              testLogRetentionGB
+            );
+          });
+
           it('can set log max file count', async function () {
             const testMaxFileCount = 123;
             cliRepl.config.logMaxFileCount = testMaxFileCount;

Diff for: packages/cli-repl/src/cli-repl.ts

@@ -260,6 +260,7 @@ export class CliRepl implements MongoshIOProvider {
         (await this.getConfig('logLocation')) ||
         this.shellHomeDirectory.localPath('.'),
       retentionDays: await this.getConfig('logRetentionDays'),
+      retentionGB: await this.getConfig('logRetentionGB'),
       maxLogFileCount: +(
         process.env.MONGOSH_TEST_ONLY_MAX_LOG_FILE_COUNT ||
         (await this.getConfig('logMaxFileCount'))

Diff for: packages/e2e-tests/test/e2e.spec.ts

@@ -1793,6 +1793,59 @@ describe('e2e', function () {
           });
         });
 
+        describe('with custom log retention max logs size', function () {
+          const customLogDir = useTmpdir();
+
+          it('should delete files once it is above the logs retention GB', async function () {
+            const globalConfig = path.join(homedir, 'globalconfig.conf');
+            await fs.writeFile(
+              globalConfig,
+              // Set logRetentionGB to 4 KB
+              `mongosh:\n  logLocation: "${
+                customLogDir.path
+              }"\n  logRetentionGB: ${4 / 1024 / 1024}`
+            );
+            const paths: string[] = [];
+            const offset = Math.floor(Date.now() / 1000);
+
+            // Create 10 log files, 1kb each
+            for (let i = 9; i >= 0; i--) {
+              const filename = path.join(
+                customLogDir.path,
+                ObjectId.createFromTime(offset - i).toHexString() + '_log'
+              );
+              await fs.writeFile(filename, '0'.repeat(1024));
+              paths.push(filename);
+            }
+
+            // All 10 existing log files exist.
+            expect(await getFilesState(paths)).to.equal('1111111111');
+            shell = this.startTestShell({
+              args: ['--nodb'],
+              env: {
+                ...env,
+                MONGOSH_TEST_ONLY_MAX_LOG_FILE_COUNT: '',
+                MONGOSH_GLOBAL_CONFIG_FILE_FOR_TESTING: globalConfig,
+              },
+              forceTerminal: true,
+            });
+
+            await shell.waitForPrompt();
+
+            // Add the newly created log to the file list.
+            paths.push(
+              path.join(customLogDir.path, `${shell.logId as string}_log`)
+            );
+
+            expect(
+              await shell.executeLine('config.get("logRetentionGB")')
+            ).contains(`${4 / 1024 / 1024}`);
+
+            // Expect 6 files to be deleted and 5 to remain (including the new log file)
+            expect(await getFilesState(paths)).to.equal('00000011111');
+          });
+        });
+
         it('creates a log file that keeps track of session events', async function () {
           expect(await shell.executeLine('print(123 + 456)')).to.include('579');
           const log = await readLogFile();

Diff for: packages/types/src/index.spec.ts

@@ -31,6 +31,12 @@ describe('config validation', function () {
     expect(await validate('logRetentionDays', -1)).to.equal(
       'logRetentionDays must be a positive integer'
     );
+    expect(await validate('logRetentionGB', 'foo')).to.equal(
+      'logRetentionGB must be a positive integer'
+    );
+    expect(await validate('logRetentionDays', -1)).to.equal(
+      'logRetentionGB must be a positive integer'
+    );
     expect(await validate('logMaxFileCount', 'foo')).to.equal(
       'logMaxFileCount must be a positive integer'
     );

Diff for: packages/types/src/index.ts

@@ -511,6 +511,7 @@ export class CliUserConfig extends SnippetShellUserConfig {
   logLocation: string | undefined = undefined;
   logRetentionDays = 30;
   logMaxFileCount = 100;
+  logRetentionGB: number | undefined = undefined;
 }
 
 export class CliUserConfigValidator extends SnippetShellUserConfigValidator {
@@ -539,6 +540,11 @@ export class CliUserConfigValidator extends SnippetShellUserConfigValidator {
           return `${key} must be a positive integer`;
         }
         return null;
+      case 'logRetentionGB':
+        if (value !== undefined && (typeof value !== 'number' || value < 0)) {
+          return `${key} must be a positive number or empty`;
+        }
+        return null;
       case 'disableLogging':
       case 'forceDisableTelemetry':
       case 'showStackTraces':