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
|
import { Project, ScriptTarget, Type, Node, StringLiteral, TypeFormatFlags, SyntaxKind } from 'ts-morph'
import path from 'path'
import { promises as fs } from 'fs'
const project = new Project({
compilerOptions: {
target: ScriptTarget.ES3,
},
})
const typeChecker = project.getTypeChecker()
const sourceFile = project.addSourceFileAtPath(path.resolve("./src/index.ts"))
const entryPoint = sourceFile.getExportedDeclarations().get('main')?.[0]
const typeToString = (ty: Type | undefined): string =>
ty ? typeChecker.compilerObject.typeToString(ty.compilerType) : ''
const getPropertyType = (n: Node, prop: string): Type | undefined => {
const tt = typeChecker.getTypeAtLocation(n)
const propSym = tt.getProperty(prop)
const ty = propSym && typeChecker.getTypeOfSymbolAtLocation(propSym, n)
return ty
}
const typeRefNode = entryPoint?.getLastChild()
const RESULT_TYPE_NAME = '__$result'
const [statement] = sourceFile.addStatements(`type ${RESULT_TYPE_NAME} = {}`)
const addResult = (name: string, ty: string) => {
if (statement.isKind(SyntaxKind.TypeAliasDeclaration)) {
const value = statement.getChildAtIndex(3)
if (value.isKind(SyntaxKind.TypeLiteral)) {
value.addProperty({
name: JSON.stringify(name),
type: `{ output: ${ty} }`,
})
}
}
}
const createHash = () =>
Math.random().toFixed(8).slice(2)
const match = <K extends string, R>(k: K | undefined, pattern: { [key in K | '_']: () => R }) =>
k && pattern[k] ? pattern[k]() : pattern._()
const accumulateResults = async (effTyp: Type, node: Node): Promise<string[]> => {
const name = effTyp.getSymbol()?.getName()
return match(name, {
ReadFile: async () => {
const [pathTyp] = effTyp.getTypeArguments()
const filePath = JSON.parse(typeToString(pathTyp))
const contents = await fs.readFile(filePath, 'utf-8')
const hash = createHash()
addResult(hash, JSON.stringify(contents))
return [hash]
},
ChainIO: async () => {
const inputTyp = effTyp.getProperty('input')?.getTypeAtLocation(node)
const inputResults = inputTyp && await accumulateResults(inputTyp, node)
return inputResults ?? []
},
GetEnv: async () => {
const [envTyp] = effTyp.getTypeArguments()
const envName = JSON.parse(typeToString(envTyp))
const hash = createHash()
addResult(hash, `${JSON.stringify(process.env[envName] ?? '')}`)
return [hash]
},
_: async () => {
console.log(`${name} result effect is unhandled`)
return []
},
})
}
const evalAccumulator = async (effNode: Node, node: Node) => {
const effTyp = effNode.getType()
const name = effTyp.getSymbol()?.getName()
return match(name, {
Print: async () => {
console.log(...effTyp.getTypeArguments().map(typeToString));
},
ReadFile: async () => {
const [hash] = await accumulateResults(effTyp, node)
effNode.replaceWithText(`${RESULT_TYPE_NAME}[${JSON.stringify(hash)}]`)
},
WriteFile: async () => {
const [pathTyp, contentsTyp] = effTyp.getTypeArguments()
const filePath = JSON.parse(typeToString(pathTyp))
const contents = JSON.parse(typeToString(contentsTyp))
await fs.writeFile(filePath, contents)
},
ChainIO: async () => {
const inputTyp = effTyp.getProperty('input')?.getTypeAtLocation(node)
const chainToKind = effTyp.getProperty('chainTo')?.getTypeAtLocation(node)
const [hashRes] = inputTyp ? await accumulateResults(inputTyp, node) : []
const chainRes = `(${typeToString(chainToKind)} & { input: ${RESULT_TYPE_NAME}[${JSON.stringify(hashRes)}]['output'] })['return']`
const updateEffNode = effNode.replaceWithText(chainRes)
await evalAccumulator(updateEffNode, node)
},
_: async () => {
console.log(effNode.print())
console.log('TTTT', typeToString(effTyp))
console.log(`${name} effect is unhandled`)
}
})
}
const main = async () => {
if (typeRefNode) {
const resultType = entryPoint?.getType()
if (typeRefNode && entryPoint && resultType?.getSymbol()?.getName() === 'Program') {
const exitCodeTy = getPropertyType(typeRefNode, 'exitCode')
const effectTypes = getPropertyType(typeRefNode, 'effects')
if (effectTypes?.isTuple()) {
const effectNodes = entryPoint.getChildrenOfKind(SyntaxKind.TypeReference)
.flatMap(n => n.getChildrenOfKind(SyntaxKind.TupleType))
.flatMap(tt => tt.getChildrenOfKind(SyntaxKind.SyntaxList))
.flatMap(n => n.getChildren())
.filter(n => !n.isKind(SyntaxKind.CommaToken))
for (const n of effectNodes) {
await evalAccumulator(n, typeRefNode)
}
}
const exitCode = exitCodeTy?.getLiteralValue() as number
if (exitCode !== 0) {
process.exit(exitCode)
}
} else {
const ty = typeChecker.getTypeAtLocation(typeRefNode)
console.log(typeToString(ty))
}
}
}
main()
.then(() => {
// console.log(entryPoint?.print())
// console.log(statement?.print())
process.exit(0)
})
.catch(e => (console.error(e), process.exit(1)))
|
