From 601c8f4694ce45d0ba32c556e2bf3109a5d416c2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philipp=20Kr=C3=BCger?= <philipp.krueger1@gmail.com>
Date: Fri, 3 Apr 2020 23:22:32 +0200
Subject: [PATCH] :tada: Initial Commit

---
 .gitignore     |  2 ++
 README.md      |  8 +++++++
 package.json   | 19 +++++++++++++++
 src/analyse.ts | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++
 tsconfig.json  | 10 ++++++++
 yarn.lock      | 30 +++++++++++++++++++++++
 6 files changed, 134 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 package.json
 create mode 100644 src/analyse.ts
 create mode 100644 tsconfig.json
 create mode 100644 yarn.lock

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c925c21
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/dist
+/node_modules
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b62f6b2
--- /dev/null
+++ b/README.md
@@ -0,0 +1,8 @@
+# elmjs-inspect
+
+## TODO
+
+* Wrap with CLI stuff (commander?)
+* Allow giving .js file by options or otherwise by file input (inquirer.js?)
+* Show results by package/module/file level
+* NPM Publish
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..d2511f7
--- /dev/null
+++ b/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "sizes",
+  "version": "1.0.0",
+  "main": "src/index.ts",
+  "license": "MIT",
+  "scripts": {
+    "repl": "ts-node --project .",
+    "build": "tsc"
+  },
+  "type": "module",
+  "devDependencies": {
+    "@types/esprima": "^4.0.2",
+    "@types/node": "^13.11.0",
+    "typescript": "^3.8.3"
+  },
+  "dependencies": {
+    "esprima": "^4.0.1"
+  }
+}
\ No newline at end of file
diff --git a/src/analyse.ts b/src/analyse.ts
new file mode 100644
index 0000000..c167727
--- /dev/null
+++ b/src/analyse.ts
@@ -0,0 +1,65 @@
+import * as FS from 'fs';
+import * as Console from 'console';
+import { promisify } from 'util';
+import * as Esprima from 'esprima';
+import * as ESTree from 'estree';
+
+function* yieldElmJsDefinitionInfos(script: Esprima.Program) {
+    for (const statement of yieldElmJsStatements(script)) {
+        yield* yieldFunctionDeclarationInfo(statement);
+        yield* yieldVariableDeclarationInfos(statement);
+    }
+}
+
+function* yieldElmJsStatements(script: Esprima.Program) {
+    for (const e of script.body) {
+        if (e.type === 'ExpressionStatement'
+            && e.expression.type === 'CallExpression'
+            && e.expression.callee.type === 'FunctionExpression') {
+            yield* e.expression.callee.body.body;
+        }
+    };
+}
+
+function* yieldFunctionDeclarationInfo(statement: ESTree.Statement) {
+    if (statement.type === 'FunctionDeclaration') {
+        yield {
+            name: statement.id.name,
+            range: statement.range
+        };
+    }
+}
+
+function* yieldVariableDeclarationInfos(statement: ESTree.Statement) {
+    if (statement.type === 'VariableDeclaration') {
+        for (const declaration of statement.declarations) {
+            if (declaration.id.type === 'Identifier') {
+                yield {
+                    name: declaration.id.name,
+                    range: declaration.range
+                };
+            }
+        }
+    }
+}
+
+function rangeSize([start, end]) {
+    return end - start;
+}
+
+function pct(value: number, of: number) {
+    return `${Number(value / of * 100).toFixed(3)}%`
+}
+
+export async function analyse(elmOutputJsFilePath: string) {
+    const file = await promisify(FS.readFile)(elmOutputJsFilePath);
+    const parsed = Esprima.parseScript(file.toString(), { range: true });
+    const size = parsed.range;
+    const infos = Array.from(yieldElmJsDefinitionInfos(parsed));
+    infos.sort((a, b) => rangeSize(b.range) - rangeSize(a.range));
+    infos.forEach(({ name, range }) => {
+        Console.log(`${pct(rangeSize(range), rangeSize(size))}: ${name}`);
+    });
+    const rangeSum = infos.map(({ range }) => rangeSize(range)).reduce((a, b) => a + b, 0);
+    Console.log(`Range sum: ${rangeSum} total: ${rangeSize(size)}, analized ${pct(rangeSum, rangeSize(size))}`);
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..0ea2bc1
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,10 @@
+{
+    "compilerOptions": {
+        // "target": "ES2019",
+        "downlevelIteration": true,
+        "outDir": "dist"
+    },
+    "files": [
+        "src/index.ts"
+    ]
+}
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 0000000..1ba017b
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,30 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@types/esprima@^4.0.2":
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/@types/esprima/-/esprima-4.0.2.tgz#0303602d0644086d4802635d7abc9ac0eec57207"
+  integrity sha512-DKqdyuy7Go7ir6iKhZ0jUvgt/h9Q5zb9xS+fLeeXD2QSHv8gC6TimgujBBGfw8dHrpx4+u2HlMv7pkYOOfuUqg==
+  dependencies:
+    "@types/estree" "*"
+
+"@types/estree@*":
+  version "0.0.44"
+  resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.44.tgz#980cc5a29a3ef3bea6ff1f7d021047d7ea575e21"
+  integrity sha512-iaIVzr+w2ZJ5HkidlZ3EJM8VTZb2MJLCjw3V+505yVts0gRC4UMvjw0d1HPtGqI/HQC/KdsYtayfzl+AXY2R8g==
+
+"@types/node@^13.11.0":
+  version "13.11.0"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-13.11.0.tgz#390ea202539c61c8fa6ba4428b57e05bc36dc47b"
+  integrity sha512-uM4mnmsIIPK/yeO+42F2RQhGUIs39K2RFmugcJANppXe6J1nvH87PvzPZYpza7Xhhs8Yn9yIAVdLZ84z61+0xQ==
+
+esprima@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
+  integrity sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==
+
+typescript@^3.8.3:
+  version "3.8.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
+  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==