FilesExpand file tree

 main

/

pythonServer.ts

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

168 lines (147 loc) · 5.36 KB

 main

/

pythonServer.ts

Copy path

Top

File metadata and controls

• Code
• Blame

168 lines (147 loc) · 5.36 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

import * as path from 'path';

import * as ch from 'child_process';

import * as rpc from 'vscode-jsonrpc/node';

import { Disposable, Event, EventEmitter, window } from 'vscode';

import { EXTENSION_ROOT_DIR } from '../constants';

import { traceError, traceLog } from '../logging';

import { captureTelemetry } from '../telemetry';

import { EventName } from '../telemetry/constants';

const SERVER_PATH = path.join(EXTENSION_ROOT_DIR, 'python_files', 'python_server.py');

let serverInstance: PythonServer | undefined;

export interface ExecutionResult {

status: boolean;

output: string;

}

export interface PythonServer extends Disposable {

onCodeExecuted: Event<void>;

readonly isExecuting: boolean;

readonly isDisposed: boolean;

execute(code: string): Promise<ExecutionResult | undefined>;

executeSilently(code: string): Promise<ExecutionResult | undefined>;

interrupt(): void;

input(): void;

checkValidCommand(code: string): Promise<boolean>;

}

class PythonServerImpl implements PythonServer, Disposable {

private readonly disposables: Disposable[] = [];

private readonly _onCodeExecuted = new EventEmitter<void>();

onCodeExecuted = this._onCodeExecuted.event;

private inFlightRequests = 0;

private disposed = false;

public get isExecuting(): boolean {

return this.inFlightRequests > 0;

}

public get isDisposed(): boolean {

return this.disposed;

}

constructor(private connection: rpc.MessageConnection, private pythonServer: ch.ChildProcess) {

this.initialize();

this.input();

}

private initialize(): void {

this.disposables.push(

this.connection.onNotification('log', (message: string) => {

traceLog('Log:', message);

}),

);

this.pythonServer.on('exit', (code) => {

traceError(`Python server exited with code ${code}`);

this.markDisposed();

});

this.pythonServer.on('error', (err) => {

traceError(err);

this.markDisposed();

});

this.connection.listen();

}

public input(): void {

// Register input request handler

this.connection.onRequest('input', async (request) => {

// Ask for user input via popup quick input, send it back to Python

let userPrompt = 'Enter your input here: ';

if (request && request.prompt) {

userPrompt = request.prompt;

}

const input = await window.showInputBox({

title: 'Input Request',

prompt: userPrompt,

ignoreFocusOut: true,

});

return { userInput: input };

});

}

@captureTelemetry(EventName.EXECUTION_CODE, { scope: 'selection' }, false)

public async execute(code: string): Promise<ExecutionResult | undefined> {

const result = await this.executeCode(code);

if (result?.status) {

this._onCodeExecuted.fire();

}

return result;

}

public executeSilently(code: string): Promise<ExecutionResult | undefined> {

return this.executeCode(code);

}

private async executeCode(code: string): Promise<ExecutionResult | undefined> {

this.inFlightRequests += 1;

try {

const result = await this.connection.sendRequest('execute', code);

return result as ExecutionResult;

} catch (err) {

const error = err as Error;

traceError(`Error getting response from REPL server:`, error);

} finally {

this.inFlightRequests -= 1;

}

return undefined;

}

public interrupt(): void {

// Passing SIGINT to interrupt only would work for Mac and Linux

if (this.pythonServer.kill('SIGINT')) {

traceLog('Python REPL server interrupted');

}

}

public async checkValidCommand(code: string): Promise<boolean> {

this.inFlightRequests += 1;

try {

const completeCode: ExecutionResult = await this.connection.sendRequest('check_valid_command', code);

return completeCode.output === 'True';

} finally {

this.inFlightRequests -= 1;

}

}

public dispose(): void {

if (this.disposed) {

return;

}

this.disposed = true;

this.connection.sendNotification('exit');

this.disposables.forEach((d) => d.dispose());

this.connection.dispose();

serverInstance = undefined;

}

private markDisposed(): void {

if (this.disposed) {

return;

}

this.disposed = true;

this.connection.dispose();

serverInstance = undefined;

}

}

export function createPythonServer(interpreter: string[], cwd?: string): PythonServer {

if (serverInstance && !serverInstance.isDisposed) {

return serverInstance;

}

const pythonServer = ch.spawn(interpreter[0], [...interpreter.slice(1), SERVER_PATH], {

cwd, // Launch with correct workspace directory

});

pythonServer.stderr.on('data', (data) => {

traceError(data.toString());

});

const connection = rpc.createMessageConnection(

new rpc.StreamMessageReader(pythonServer.stdout),

new rpc.StreamMessageWriter(pythonServer.stdin),

);

serverInstance = new PythonServerImpl(connection, pythonServer);

return serverInstance;

}