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import { ActionHandler } from './action-handler.interface';
import {
ActionExecutionResult,
PlanExecutionContext,
ToolMetadata,
} from '../llm-orchestration.interfaces';
import { RunCommandArgsDto } from './dto/run-command.args.dto';
import { plainToClass } from 'class-transformer';
import { validate } from 'class-validator';
import { generateToolCall, generateToolCallJson } from '../../utils';
import { execWithProcessGroupKill } from '../../utils/spawn-with-kill';
import * as fs from 'fs/promises';
import * as path from 'path';
import { ApplicationStateService } from '../../application-state/application-state.service';
import { countTokens } from 'gpt-tokenizer';
@Injectable()
export class RunCommandHandler implements ActionHandler {
readonly toolName = 'run_command';
private readonly logger = new Logger(RunCommandHandler.name);
private readonly projectRoot: string =
process.env.REPOBURG_PROJECT_PATH || process.cwd();
private readonly tempDir: string = path.join(
this.projectRoot,
'.repoburg',
'temp',
);
constructor(
private readonly applicationStateService: ApplicationStateService,
) {}
getMetadata(): ToolMetadata {
return {
name: this.toolName,
description: this.getDefinition(true),
arguments: [
{
name: 'command_string',
type: 'string',
description: 'The shell command to execute.',
required: true,
},
{
name: 'timeout',
type: 'number',
description:
'Optional timeout in milliseconds (default: 60000ms, min: 1000ms).',
required: false,
},
],
};
}
/**
* Generates a tool call example in the specified format.
* @param toolCall - The tool call object to format
* @param useJson - If true, uses JSON format; otherwise uses XML-style format
* @returns Formatted tool call string
*/
private generateExample(
toolCall: Record<string, any>,
useJson: boolean = false,
): string {
return useJson
? generateToolCallJson(toolCall)
: generateToolCall(toolCall);
}
getDefinition(useJsonFormat: boolean = false): string {
const treeExample = this.generateExample(
{
tool_name: this.toolName,
command_string: 'tree -L 2 src',
},
useJsonFormat,
);
const rgExample = this.generateExample(
{
tool_name: this.toolName,
command_string: 'rg "TODO|FIXME" .',
},
useJsonFormat,
);
const gitExample = this.generateExample(
{
tool_name: this.toolName,
command_string: 'git status',
},
useJsonFormat,
);
const installExample = this.generateExample(
{
tool_name: this.toolName,
command_string: 'npm install lodash',
},
useJsonFormat,
);
const timeoutExample = this.generateExample(
{
tool_name: this.toolName,
command_string: 'npm run build',
timeout: 120000,
},
useJsonFormat,
);
const definition = `
-------------
### ${this.toolName}
Executes a shell command in the root of the project.
Used for system modifications, running scripts, package management, or git operations.
#### Parameters
- "command_string": (string) The shell command to execute.
- "timeout": (number, optional) Timeout in milliseconds. Default is 60000ms (1 minute), minimum is 1000ms.
#### Example: Tree
:${treeExample}
#### Example: RipGrep
:${rgExample}
#### Example: Git
:${gitExample}
#### Example: Install
:${installExample}
#### Example: With Timeout
:${timeoutExample}
-------------
`;
return `\n${definition.trim()}\n`;
}
/**
* Normalizes common parameter name mistakes before validation.
* Maps intuitive but incorrect names to the expected schema.
* @param args - The raw arguments from the LLM
* @returns Normalized arguments with correct parameter names
*/
private normalizeArgs(args: Record<string, any>): Record<string, any> {
const normalized = { ...args };
// Map 'command' to 'command_string'
if ('command' in normalized && !('command_string' in normalized)) {
normalized.command_string = normalized.command;
delete normalized.command;
this.logger.debug(
'Auto-corrected parameter name: "command" → "command_string"',
);
}
return normalized;
}
async execute(
args: { [key: string]: any },
_context: PlanExecutionContext,
): Promise<ActionExecutionResult> {
// Auto-correct common parameter name mistakes before validation
const normalizedArgs = this.normalizeArgs(args);
const validatedArgs = plainToClass(RunCommandArgsDto, normalizedArgs);
const errors = await validate(validatedArgs);
if (errors.length > 0) {
const errorMessages = errors
.map((err) => Object.values(err.constraints || {}).join(', '))
.join('; ');
return {
status: 'FAILURE',
summary: `Invalid arguments for ${this.toolName}.`,
error_message: errorMessages,
persisted_args: args,
execution_log: { output: '', error_message: errorMessages },
};
}
const { command_string, timeout } = validatedArgs;
const commandTimeout = timeout ?? 60000;
let unifiedOutput: string;
let summary: string;
let status: 'SUCCESS' | 'FAILURE' = 'SUCCESS';
let errorMessage: string | undefined;
// Create temp directory and script
await fs.mkdir(this.tempDir, { recursive: true });
const scriptPath = path.join(
this.tempDir,
`run-${Date.now()}-${Math.random().toString(36).substring(7)}.sh`,
);
try {
// Write command to a shell script
// Explicitly cd to project root because login shells might reset cwd to home
const scriptContent = `
cd "${this.projectRoot}"
${command_string}
`;
await fs.writeFile(scriptPath, scriptContent, { mode: 0o755 });
// Determine shell (default to bash) and run as login shell (-l) to load profile
const shell = process.env.SHELL || '/bin/bash';
// Prepend cd to project root to ensure correct context before shell start
const command = `cd "${this.projectRoot}" && ${shell} -l "${scriptPath}"`;
const result = await execWithProcessGroupKill(command, {
cwd: this.projectRoot,
timeout: commandTimeout,
});
if (result.killed) {
// Process was killed due to timeout
unifiedOutput = `COMMAND TIMED OUT after ${commandTimeout}ms\n\nSTDOUT:\n${result.stdout || 'N/A'}\n\nSTDERR:\n${result.stderr || 'N/A'}`;
summary = `Command "${command_string}" timed out after ${commandTimeout}ms.`;
status = 'FAILURE';
errorMessage = `Command timed out after ${commandTimeout}ms.`;
this.logger.warn(`Command timed out: ${command_string}`);
} else if (result.exitCode !== 0) {
// Non-zero exit code
unifiedOutput = `COMMAND FAILED with exit code ${result.exitCode}\n\nSTDOUT:\n${result.stdout || 'N/A'}\n\nSTDERR:\n${result.stderr || 'N/A'}`;
summary = `Command "${command_string}" failed.`;
status = 'FAILURE';
errorMessage = `Command failed with exit code ${result.exitCode}.`;
this.logger.error(`Command failed: ${unifiedOutput}`);
} else {
unifiedOutput =
result.stdout || result.stderr || '(Command produced no output)';
summary = `Command "${command_string}" executed.`;
}
} catch (error) {
const execError = error as any;
unifiedOutput = `COMMAND FAILED: ${execError.message}\n\nSTDOUT:\n${
execError.stdout || 'N/A'
}\n\nSTDERR:\n${execError.stderr || 'N/A'}`;
summary = `Command "${command_string}" failed.`;
status = 'FAILURE';
errorMessage = execError.message;
this.logger.error(`Error executing command: ${unifiedOutput}`);
} finally {
// Cleanup temp file
await fs
.unlink(scriptPath)
.catch((err) =>
this.logger.warn(
`Failed to cleanup temp file ${scriptPath}: ${err.message}`,
),
);
}
// Check token limit
const tokenCount = countTokens(unifiedOutput);
const tokenLimit =
await this.applicationStateService.getEffectiveFollowupTokenLimit(
_context.system_prompt_id,
);
Iif (tokenCount > tokenLimit) {
// Truncate output proportionally
const ratio = tokenLimit / tokenCount;
const truncatedLength = Math.floor(unifiedOutput.length * ratio);
const truncatedOutput = unifiedOutput.slice(0, truncatedLength);
const truncationWarning = `\n\n[OUTPUT TRUNCATED: ${tokenCount} tokens exceeds limit of ${tokenLimit}. Consider redirecting large outputs to a file and using request_context to read it.]`;
unifiedOutput = truncatedOutput + truncationWarning;
errorMessage =
(errorMessage || '') +
`Output truncated due to size limit (${tokenCount} > ${tokenLimit} tokens).`;
this.logger.warn(
`Command output truncated: ${tokenCount} tokens exceeds limit of ${tokenLimit}`,
);
}
return {
status,
summary: `${summary} Output captured.`,
persisted_args: { command_string, timeout: commandTimeout },
error_message: errorMessage,
execution_log: {
output: unifiedOutput,
error_message: errorMessage || '',
},
};
}
}
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