refactor(api): separate feature enabling function (#647)

also introduces `index.ts` to define API for third-party tools

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Removed unsupported iterators API: PR [#633](https://github.com/tact-lang/tact/pull/633)
+- Created a separate API function to enable compiler features: PR [#647](https://github.com/tact-lang/tact/pull/647)
 
 ### Fixed
 

knip.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://unpkg.com/knip@5/schema.json",
-  "entry": ["src/main.ts", "src/node.ts", "bin/tact.js", "scripts/*.ts"],
+  "entry": ["src/index.ts", "src/main.ts", "src/node.ts", "bin/tact.js"],
   "project": ["src/**/*.ts", "bin/tact.js"],
   "ignore": [
     "src/grammar/ast.ts",

src/index.ts

@@ -0,0 +1 @@
+export { enableFeatures, build } from "./pipeline/build";

src/pipeline/build.ts

@@ -22,6 +22,31 @@ import { getCompilerVersion } from "./version";
 import { idText } from "../grammar/ast";
 import { TactErrorCollection } from "../errors";
 
+export function enableFeatures(
+    ctx: CompilerContext,
+    logger: Logger,
+    config: ConfigProject,
+): CompilerContext {
+    if (config.options === undefined) {
+        return ctx;
+    }
+    const features = [
+        { option: config.options.debug, name: "debug" },
+        { option: config.options.masterchain, name: "masterchain" },
+        { option: config.options.external, name: "external" },
+        { option: config.options.experimental?.inline, name: "inline" },
+        { option: config.options.ipfsAbiGetter, name: "ipfsAbiGetter" },
+        { option: config.options.interfacesGetter, name: "interfacesGetter" },
+    ];
+    return features.reduce((currentCtx, { option, name }) => {
+        if (option) {
+            logger.debug(`   > 👀 Enabling ${name}`);
+            return featureEnable(currentCtx, name);
+        }
+        return currentCtx;
+    }, ctx);
+}
+
 export async function build(args: {
     config: ConfigProject;
     project: VirtualFileSystem;
@@ -41,32 +66,7 @@ export async function build(args: {
         entrypoint: posixNormalize(config.path),
         options: config.options ?? {},
     });
-    if (config.options) {
-        if (config.options.debug) {
-            logger.error("   > 👀 Enabling debug");
-            ctx = featureEnable(ctx, "debug");
-        }
-        if (config.options.masterchain) {
-            logger.error("   > 👀 Enabling masterchain");
-            ctx = featureEnable(ctx, "masterchain");
-        }
-        if (config.options.external) {
-            logger.error("   > 👀 Enabling external");
-            ctx = featureEnable(ctx, "external");
-        }
-        if (config.options.experimental?.inline) {
-            logger.error("   > 👀 Enabling inline");
-            ctx = featureEnable(ctx, "inline");
-        }
-        if (config.options.ipfsAbiGetter) {
-            logger.error("   > 👀 Enabling IPFS ABI getter");
-            ctx = featureEnable(ctx, "ipfsAbiGetter");
-        }
-        if (config.options.interfacesGetter) {
-            logger.error("   > 👀 Enabling contract interfaces getter");
-            ctx = featureEnable(ctx, "interfacesGetter");
-        }
-    }
+    ctx = enableFeatures(ctx, logger, config);
 
     // Precompile
     try {