Improved apigen tool for cpp
This commit is contained in:
283
tools/apigen.ts
283
tools/apigen.ts
@@ -4,59 +4,244 @@ import {
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parse
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} from '@typescript-eslint/typescript-estree';
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import * as fs from 'fs';
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import {
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Decorator,
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ExportDefaultDeclaration,
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FunctionExpression,
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Literal
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} from '@typescript-eslint/types/dist/generated/ast-spec';
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import * as path from 'path';
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import * as a from '@typescript-eslint/types/dist/generated/ast-spec';
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import { TypeNode } from '@typescript-eslint/types/dist/generated/ast-spec';
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import { Writable } from 'stream';
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const program = createProgram('tsconfig.json');
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const ast = parse(fs.readFileSync('src/controller/filesystem.ts').toString(), {
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programs: [program]
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});
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function parseDecorators(decs: Decorator[]): object[] | null {
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try {
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return decs.map((dec) => {
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if (dec.expression.type !== AST_NODE_TYPES.CallExpression)
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throw null;
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if (dec.expression.callee.type != AST_NODE_TYPES.Identifier)
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throw null;
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const name = dec.expression.callee.name;
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if (name === 'Request') throw null;
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const prop = (
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dec.expression.arguments
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.filter((arg) => arg.type === AST_NODE_TYPES.Literal)
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.pop() as Literal
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).value;
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return { name: name, prop: prop };
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});
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} catch (e) {
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return null;
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class Err extends Error {
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constructor(o: object) {
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super();
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console.error(o);
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}
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}
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function parseFunction(name: string, func: FunctionExpression) {
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const decs = func.params
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.map((p) => p.decorators)
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.map(parseDecorators)
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.filter((d) => d !== null);
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console.log(name, decs);
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const program = createProgram('tsconfig.json');
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class BetterWritable {
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constructor(private w: Writable) {}
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private indent = 0;
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write(data: string) {
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this.w.write('\t'.repeat(this.indent));
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this.w.write(data);
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this.w.write('\n');
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}
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writeInc(data: string) {
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this.write(data);
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this.indent++;
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}
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writeDec(data: string) {
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this.indent--;
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this.write(data);
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}
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}
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ast.body
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.filter((body) => body.type == AST_NODE_TYPES.ExportDefaultDeclaration)
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.forEach((body: ExportDefaultDeclaration) => {
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if (body.declaration.type !== AST_NODE_TYPES.ClassDeclaration) return;
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if (body.declaration.body.type !== AST_NODE_TYPES.ClassBody) return;
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body.declaration.body.body.forEach((def) => {
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if (
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def.type === AST_NODE_TYPES.MethodDefinition &&
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'name' in def.key &&
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def.key.name !== 'constructor' &&
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def.value.type === AST_NODE_TYPES.FunctionExpression
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)
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parseFunction(def.key.name, def.value);
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});
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interface Outputable {
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write(s: BetterWritable);
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}
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class CppProp {
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constructor(entry: string) {
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this.entry = entry;
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}
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entry: string;
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}
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class CppClass implements Outputable {
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constructor(name: string) {
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this.name = name;
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}
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name: string;
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sub: string[] = [];
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entries: CppProp[] = [];
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write(s: BetterWritable) {
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let name = `struct ${this.name}`;
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if (this.sub.length > 0) name += ' : ' + this.sub.join(', ');
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if (this.entries.length == 0) s.write(`${name} {}`);
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else {
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s.writeInc(`${name} {`);
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this.entries.forEach((e) => s.write(`${e.entry};`));
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s.writeDec('};');
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}
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}
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}
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class CppEnum implements Outputable {
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constructor(name: string) {
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this.name = name;
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}
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name: string;
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entries: CppProp[] = [];
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write(s: BetterWritable) {
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s.writeInc(`enum ${this.name} {`);
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this.entries.forEach((e, idx, arr) =>
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s.write(`${e.entry}${idx === arr.length - 1 ? '' : ','}`)
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);
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s.writeDec('};');
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}
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}
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class CppNamespace implements Outputable {
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constructor(name: string) {
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this.name = name;
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}
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name: string;
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body: (CppNamespace | CppClass | CppEnum)[] = [];
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write(s: BetterWritable) {
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s.writeInc(`namespace ${this.name} {`);
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this.body.forEach((b) => b.write(s));
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s.writeDec('}');
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}
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}
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function _getCppType(
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t: TypeNode
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): string | ((opt: boolean, name: string) => string) {
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switch (t.type) {
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case AST_NODE_TYPES.TSStringKeyword:
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return 'std::string';
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case AST_NODE_TYPES.TSBooleanKeyword:
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return 'bool';
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case AST_NODE_TYPES.TSNumberKeyword:
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return 'long';
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case AST_NODE_TYPES.TSTypeReference:
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if (t.typeName.type != AST_NODE_TYPES.Identifier) throw new Err(t);
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return t.typeName.name;
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case AST_NODE_TYPES.TSLiteralType:
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if (t.literal.type != AST_NODE_TYPES.Literal) throw new Err(t);
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return (opt, name) => `${name} = ${(t.literal as a.Literal).raw}`;
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case AST_NODE_TYPES.TSUnionType:
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return _getCppType(t.types[0]);
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case AST_NODE_TYPES.TSArrayType:
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return (opt, name) =>
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opt
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? `std::optional<${_getCppType(t.elementType)}[]> ${name}`
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: `${getCppType(false, name, t.elementType)}[]`;
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default:
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throw new Err(t);
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}
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}
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function getCppType(opt: boolean, name: string, t: TypeNode): string {
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let ret = _getCppType(t);
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if (typeof ret === 'string') {
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if (opt) ret = `std::optional<${ret}>`;
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return `${ret} ${name}`;
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} else return `${ret(opt, name)}`;
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}
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function handleClassProperty(
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prop: a.PropertyDefinitionComputedName | a.PropertyDefinitionNonComputedName
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): CppProp {
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if (prop.key.type != AST_NODE_TYPES.Identifier) throw new Err(prop);
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if (!prop.typeAnnotation) throw new Err(prop);
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return new CppProp(
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getCppType(
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prop.optional && prop.optional,
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prop.key.name,
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prop.typeAnnotation.typeAnnotation
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)
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);
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}
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function handleClass(
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dec: a.ClassDeclarationWithName | a.ClassDeclarationWithOptionalName
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): CppClass {
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if (!dec.id) throw new Err(dec);
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const cls = new CppClass(dec.id.name);
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if (dec.superClass) {
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const subCls = dec.superClass;
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if (subCls.type == AST_NODE_TYPES.Identifier) cls.sub.push(subCls.name);
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else throw new Err(subCls);
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}
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dec.body.body.forEach((inner) => {
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if (inner.type == AST_NODE_TYPES.PropertyDefinition) {
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cls.entries.push(handleClassProperty(inner));
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} else if (
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inner.type == AST_NODE_TYPES.MethodDefinition &&
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inner.key.type == AST_NODE_TYPES.Identifier &&
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inner.key.name === 'constructor'
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)
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console.warn('Handle constructors?');
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else throw new Err(inner);
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});
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return cls;
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}
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function handleEnum(dec: a.TSEnumDeclaration): CppEnum {
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const enm = new CppEnum(dec.id.name);
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dec.members.forEach((member) => {
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if (
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member.id.type == AST_NODE_TYPES.Identifier &&
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member.initializer.type == AST_NODE_TYPES.Literal
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) {
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enm.entries.push(
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new CppProp(`${member.id.name} = ${member.initializer.raw}`)
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);
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} else throw new Err(member);
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});
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return enm;
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}
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function handleNamedDeclaration(
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dec: a.ExportNamedDeclaration
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): CppClass | CppEnum | undefined {
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if (!dec.declaration) throw new Err(dec);
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else if (dec.declaration.type == AST_NODE_TYPES.ClassDeclaration)
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return handleClass(dec.declaration);
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else if (dec.declaration.type == AST_NODE_TYPES.TSEnumDeclaration)
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return handleEnum(dec.declaration);
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else if (dec.declaration.type == AST_NODE_TYPES.FunctionDeclaration) return;
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else {
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throw new Err(dec);
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}
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}
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function handleExport(
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ns: CppNamespace,
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file: string,
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body: a.ExportNamedDeclaration | a.ExportAllDeclaration
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) {
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let newPath = path.join(path.dirname(file), body.source.value);
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if (fs.existsSync(newPath) && fs.statSync(newPath).isDirectory())
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newPath = path.join(newPath, 'index.ts');
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else if (!newPath.endsWith('.ts')) newPath = newPath + '.ts';
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console.log(`${file}: ${newPath}`);
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parseFile(ns, newPath);
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}
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function parseFile(ns: CppNamespace, file: string) {
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const ast = parse(fs.readFileSync(file).toString(), {
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programs: [program]
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});
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ast.body
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.filter((body) => body.type == AST_NODE_TYPES.ExportNamedDeclaration)
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.forEach((body: a.ExportNamedDeclaration) => {
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if (!body.source) {
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const ret = handleNamedDeclaration(body);
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if (ret) ns.body.push(ret);
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} else handleExport(ns, file, body);
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});
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ast.body
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.filter((body) => body.type == AST_NODE_TYPES.ExportAllDeclaration)
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.forEach((body: a.ExportAllDeclaration) => {
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let usedNs = ns;
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if ('exported' in body && body.exported) {
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const newNs = new CppNamespace(body.exported.name);
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ns.body.push(newNs);
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usedNs = newNs;
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}
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handleExport(usedNs, file, body);
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});
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}
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const globalNamespace = new CppNamespace('dto');
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parseFile(globalNamespace, 'dto/index.ts');
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const output_stream = fs.createWriteStream('dto.h');
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output_stream.write('#include <string>\n#include <optional>\n\n');
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globalNamespace.write(new BetterWritable(output_stream));
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