diff --git a/packages/typed-env-cli/src/lib/__fixtures__/assignment-typed-env.ts b/packages/typed-env-cli/src/lib/__fixtures__/assignment-typed-env.ts
new file mode 100644
index 0000000..f7d2da9
--- /dev/null
+++ b/packages/typed-env-cli/src/lib/__fixtures__/assignment-typed-env.ts
@@ -0,0 +1,10 @@
+import { typedEnv } from '@placeholdersoft/typed-env';
+
+
+typedEnv('aaa').required().default('222').toString()
+const aaa = typedEnv('eee').default('222').toString();
+
+typedEnv('ccc')
+    .required()
+    .default('222')
+    .toString();
diff --git a/packages/typed-env-cli/src/lib/__tests__/__snapshots__/generate-env.test.ts.snap b/packages/typed-env-cli/src/lib/__tests__/__snapshots__/generate-env.test.ts.snap
new file mode 100644
index 0000000..8b149fb
--- /dev/null
+++ b/packages/typed-env-cli/src/lib/__tests__/__snapshots__/generate-env.test.ts.snap
@@ -0,0 +1,38 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`assignment generate env 1`] = `
+Array [
+  "aaa=",
+  "ccc=",
+  "eee=",
+]
+`;
+
+exports[`assignment generate env name 1`] = `
+Object {
+  "aaa": "aaa",
+  "ccc": "ccc",
+  "eee": "eee",
+}
+`;
+
+exports[`call chaining generate env 1`] = `
+Array [
+  "// default=['111','222','333']",
+  "bbb='111'",
+  "// default=['111','222','333']",
+  "ccc='111'",
+  "ddd=",
+  "// default=['']",
+  "eee=",
+]
+`;
+
+exports[`call chaining generate env name 1`] = `
+Object {
+  "bbb": "bbb",
+  "ccc": "ccc",
+  "ddd": "ddd",
+  "eee": "eee",
+}
+`;
diff --git a/packages/typed-env-cli/src/lib/__tests__/__snapshots__/generate-typed-env-call-usage-report.test.ts.snap b/packages/typed-env-cli/src/lib/__tests__/__snapshots__/generate-typed-env-call-usage-report.test.ts.snap
new file mode 100644
index 0000000..d4159c1
--- /dev/null
+++ b/packages/typed-env-cli/src/lib/__tests__/__snapshots__/generate-typed-env-call-usage-report.test.ts.snap
@@ -0,0 +1,169 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`generate typeEnv call usage report 1`] = `
+Object {
+  "data": Object {
+    "bbb": Object {
+      "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L3#S54": Object {
+        "default": "'111'",
+        "required": true,
+        "type": "number",
+      },
+      "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L4#S109": Object {
+        "default": "'222'",
+        "required": true,
+        "type": "number",
+      },
+      "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L5#S163": Object {
+        "default": "'333'",
+        "required": true,
+        "type": "number",
+      },
+      "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L6#S217": Object {
+        "default": "'333'",
+        "required": true,
+        "type": "string",
+      },
+    },
+    "ccc": Object {
+      "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L10#S380": Object {
+        "default": "'333'",
+        "required": true,
+        "type": "number",
+      },
+      "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L11#S434": Object {
+        "default": "'333'",
+        "required": true,
+        "type": "string",
+      },
+      "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L8#S271": Object {
+        "default": "'111'",
+        "required": true,
+        "type": "number",
+      },
+      "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L9#S326": Object {
+        "default": "'222'",
+        "required": true,
+        "type": "number",
+      },
+    },
+    "ddd": Object {
+      "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L13#S488": Object {
+        "required": false,
+        "type": "string",
+      },
+    },
+    "eee": Object {
+      "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L15#S506": Object {
+        "default": "''",
+        "required": false,
+        "type": "string",
+      },
+    },
+  },
+  "envNames": Array [
+    "bbb",
+    "ccc",
+    "ddd",
+    "eee",
+  ],
+  "exceptionReport": Array [
+    Object {
+      "envKey": "bbb",
+      "errors": Array [
+        "envKey: bbb has different types: number,string",
+      ],
+      "line": Array [
+        Object {
+          "errors": undefined,
+          "path": "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L3#S54",
+        },
+        Object {
+          "errors": undefined,
+          "path": "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L4#S109",
+        },
+        Object {
+          "errors": undefined,
+          "path": "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L5#S163",
+        },
+        Object {
+          "errors": undefined,
+          "path": "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L6#S217",
+        },
+      ],
+      "types": Array [
+        "number",
+        "string",
+      ],
+      "warnings": Array [
+        "envKey: bbb has different default value: '111','222','333'",
+      ],
+    },
+    Object {
+      "envKey": "ccc",
+      "errors": Array [
+        "envKey: ccc has different types: number,string",
+      ],
+      "line": Array [
+        Object {
+          "errors": undefined,
+          "path": "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L8#S271",
+        },
+        Object {
+          "errors": undefined,
+          "path": "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L9#S326",
+        },
+        Object {
+          "errors": undefined,
+          "path": "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L10#S380",
+        },
+        Object {
+          "errors": undefined,
+          "path": "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L11#S434",
+        },
+      ],
+      "types": Array [
+        "number",
+        "string",
+      ],
+      "warnings": Array [
+        "envKey: ccc has different default value: '111','222','333'",
+      ],
+    },
+    Object {
+      "envKey": "ddd",
+      "errors": Array [
+        "envKey: ddd has different types: string",
+      ],
+      "line": Array [
+        Object {
+          "errors": undefined,
+          "path": "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L13#S488",
+        },
+      ],
+      "types": Array [
+        "string",
+      ],
+      "warnings": Array [],
+    },
+    Object {
+      "envKey": "eee",
+      "errors": Array [
+        "envKey: eee has different types: string",
+      ],
+      "line": Array [
+        Object {
+          "errors": undefined,
+          "path": "/Users/pankai/projects/company/PlaceholderSoft/libs/packages/typed-env-cli/src/lib/__fixtures__/usage-typed-env.ts#L15#S506",
+        },
+      ],
+      "types": Array [
+        "string",
+      ],
+      "warnings": Array [
+        "envKey: eee has different default value: ''",
+      ],
+    },
+  ],
+}
+`;
diff --git a/packages/typed-env-cli/src/lib/__tests__/generate-env.test.ts b/packages/typed-env-cli/src/lib/__tests__/generate-env.test.ts
index fead524..c4cf4fe 100644
--- a/packages/typed-env-cli/src/lib/__tests__/generate-env.test.ts
+++ b/packages/typed-env-cli/src/lib/__tests__/generate-env.test.ts
@@ -1,32 +1,66 @@
-import { existsSync } from 'fs';
 import path from 'path';
-import { generateEnv, generateEnvName } from '../generate-env';
+import {
+  generateEnvByTypedEnv,
+  generateEnvNameByTypedEnv,
+} from '../generate-env';
 
-const kSourceFilePath = path.resolve(
-  __dirname,
-  '../__fixtures__/usage-typed-env.ts'
-);
-const kTsconfigPath = path.resolve(
-  __dirname,
-  '../__fixtures__/tsconfig.t.json'
-);
+describe('call chaining', () => {
+  const kSourceFilePath = path.resolve(
+    __dirname,
+    '../__fixtures__/usage-typed-env.ts'
+  );
+  const kTsconfigPath = path.resolve(
+    __dirname,
+    '../__fixtures__/tsconfig.t.json'
+  );
 
-test('generate env name', () => {
-  const envNames = generateEnvName({
-    sourceFilePath: kSourceFilePath,
-    options: {
-      tsConfigFilePath: kTsconfigPath,
-    },
+  test('generate env name', () => {
+    const envNames = generateEnvNameByTypedEnv({
+      sourceFilePath: kSourceFilePath,
+      options: {
+        tsConfigFilePath: kTsconfigPath,
+      },
+    });
+    expect(envNames).toMatchSnapshot();
+  });
+
+  test('generate env', () => {
+    const env = generateEnvByTypedEnv({
+      sourceFilePath: kSourceFilePath,
+      options: {
+        tsConfigFilePath: kTsconfigPath,
+      },
+    });
+    expect(env).toMatchSnapshot();
   });
-  console.log(envNames);
 });
 
-test('generate env', () => {
-  const env = generateEnv({
-    sourceFilePath: kSourceFilePath,
-    options: {
-      tsConfigFilePath: kTsconfigPath,
-    },
+describe('assignment', () => {
+  const kSourceFilePath = path.resolve(
+    __dirname,
+    '../__fixtures__/assignment-typed-env.ts'
+  );
+  const kTsconfigPath = path.resolve(
+    __dirname,
+    '../__fixtures__/tsconfig.t.json'
+  );
+  test('generate env name', () => {
+    const envNames = generateEnvNameByTypedEnv({
+      sourceFilePath: kSourceFilePath,
+      options: {
+        tsConfigFilePath: kTsconfigPath,
+      },
+    });
+    expect(envNames).toMatchSnapshot();
+  });
+
+  test('generate env', () => {
+    const env = generateEnvByTypedEnv({
+      sourceFilePath: kSourceFilePath,
+      options: {
+        tsConfigFilePath: kTsconfigPath,
+      },
+    });
+    expect(env).toMatchSnapshot();
   });
-  console.log(env);
 });
diff --git a/packages/typed-env-cli/src/lib/__tests__/generate-typed-env-call-usage-report.test.ts b/packages/typed-env-cli/src/lib/__tests__/generate-typed-env-call-usage-report.test.ts
index be90358..4a0673b 100644
--- a/packages/typed-env-cli/src/lib/__tests__/generate-typed-env-call-usage-report.test.ts
+++ b/packages/typed-env-cli/src/lib/__tests__/generate-typed-env-call-usage-report.test.ts
@@ -15,5 +15,5 @@ test('generate typeEnv call usage report', () => {
     sourceFilePath: kSourceFilePath,
     options: { tsConfigFilePath: kTsconfigPath },
   });
-  expect(info.envNames[0]).toBe('bbb');
+  expect(info).toMatchSnapshot();
 });
diff --git a/packages/typed-env-cli/src/lib/function-call/get-args/statement.ts b/packages/typed-env-cli/src/lib/function-call/get-args/statement.ts
index 971eb4c..7c3fe72 100644
--- a/packages/typed-env-cli/src/lib/function-call/get-args/statement.ts
+++ b/packages/typed-env-cli/src/lib/function-call/get-args/statement.ts
@@ -23,5 +23,19 @@ export function getCallUsageArgsFromStatement(
     result && argsInfo.push(result);
   }
 
+  const variableStatements = source.getDescendantsOfKind(
+    SyntaxKind.VariableStatement
+  );
+
+  for (const es of variableStatements) {
+    const result = getArgsFromCall({
+      source: es,
+      filePath,
+      chainCallFuncNames,
+    });
+
+    result && argsInfo.push(result);
+  }
+
   return argsInfo;
 }
diff --git a/packages/typed-env-cli/src/lib/function-call/types.ts b/packages/typed-env-cli/src/lib/function-call/types.ts
index 66cbc11..0d36d70 100644
--- a/packages/typed-env-cli/src/lib/function-call/types.ts
+++ b/packages/typed-env-cli/src/lib/function-call/types.ts
@@ -5,12 +5,14 @@ import {
   ProjectOptions,
   SourceFile,
   ts,
+  VariableStatement,
 } from 'ts-morph';
 
 export type TSource =
   | SourceFile
   | Block
   | ExpressionStatement
+  | VariableStatement
   | CallExpression<ts.CallExpression>;
 
 export type TParseParameters = {
diff --git a/packages/typed-env-cli/src/lib/generate-typed-env-call-usage-report.ts b/packages/typed-env-cli/src/lib/generate-typed-env-call-usage-report.ts
index 49f867d..32f022f 100644
--- a/packages/typed-env-cli/src/lib/generate-typed-env-call-usage-report.ts
+++ b/packages/typed-env-cli/src/lib/generate-typed-env-call-usage-report.ts
@@ -11,7 +11,7 @@ type TResult = {
 };
 
 type TFunCallArg = {
-  [secretKey in string]: { [path in string]: TResult };
+  [envKey in string]: { [path in string]: TResult };
 };
 
 export type Report = { sourceFilePath: string; options?: ProjectOptions };
@@ -64,7 +64,7 @@ const exceptionReport = (data: TFunCallArg) => {
       );
 
       if (types.length > 0) {
-        errors.push(`secretKey: ${r} has different types: ${types.join(',')}`);
+        errors.push(`envKey: ${r} has different types: ${types.join(',')}`);
       }
 
       const defaultValue = uniqBy(
@@ -74,7 +74,7 @@ const exceptionReport = (data: TFunCallArg) => {
 
       if (defaultValue.length > 0) {
         warnings.push(
-          `secretKey: ${r} has different default value: ${defaultValue.join(
+          `envKey: ${r} has different default value: ${defaultValue.join(
             ','
           )}`
         );
@@ -92,7 +92,7 @@ const exceptionReport = (data: TFunCallArg) => {
       }
 
       return {
-        secretKey: r,
+        envKey: r,
         types,
         line,
         errors,
@@ -113,7 +113,7 @@ const parseEnvInfo = (result: TParseParameters[][]) => {
       return acc;
     }
 
-    const secret = acc[value.secretKey];
+    const secret = acc[value.envKey];
 
     if (secret) {
       if (secret[value.path] == null) {
@@ -124,7 +124,7 @@ const parseEnvInfo = (result: TParseParameters[][]) => {
         };
       }
     } else {
-      acc[value.secretKey] = {
+      acc[value.envKey] = {
         [value.path]: {
           required: value.required,
           type: value.type,
@@ -157,14 +157,14 @@ const parseCallChaining = (args: TParseParameters[]) => {
     ["''", '""'].includes(typeEnvInfo.args[0])
   ) {
     // console.warn(
-    //   `not support secretKey is not \"\" or '' in ${typeEnvInfo.path}`
+    //   `not support envKey is not \"\" or '' in ${typeEnvInfo.path}`
     // );
 
     return;
   }
 
   // Remove the front and back quotation marks of the string
-  const secretKey: string = typeEnvInfo.args[0].substring(
+  const envKey: string = typeEnvInfo.args[0].substring(
     1,
     typeEnvInfo.args[0].length - 1
   );
@@ -201,7 +201,7 @@ const parseCallChaining = (args: TParseParameters[]) => {
   }
 
   return {
-    secretKey,
+    envKey,
     path: typeEnvInfo.path,
     required:
       (optionalInfoIndex === -1 && requiredInfoIndex !== -1) ||