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fix: do not generate unused-export-let inside <script context="module"> (#7232)

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Fixes #7055. This warning can be delegated to userland tools like eslint
pull/7336/head
rgossiaux 3 years ago committed by GitHub
parent 9b7b8149e4
commit e2adf6a211
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 84 additions and 61 deletions
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6
src/compiler/compile/Component.ts
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@ -519,7 +519,7 @@ export default class Component {
return result;
}
private _extract_exports(node: ExportDefaultDeclaration | ExportNamedDeclaration | ExportAllDeclaration, module_script) {
private _extract_exports(node: ExportDefaultDeclaration | ExportNamedDeclaration | ExportAllDeclaration, module_script: boolean) {
if (node.type === 'ExportDefaultDeclaration') {
return this.error(node as any, compiler_errors.default_export);
}
@ -539,7 +539,7 @@ export default class Component {
extract_names(declarator.id).forEach(name => {
const variable = this.var_lookup.get(name);
variable.export_name = name;
if (variable.writable && !(variable.referenced || variable.referenced_from_script || variable.subscribable)) {
if (!module_script && variable.writable && !(variable.referenced || variable.referenced_from_script || variable.subscribable)) {
this.warn(declarator as any, compiler_warnings.unused_export_let(this.name.name, name));
}
});
@ -559,7 +559,7 @@ export default class Component {
if (variable) {
variable.export_name = specifier.exported.name;
if (variable.writable && !(variable.referenced || variable.referenced_from_script || variable.subscribable)) {
if (!module_script && variable.writable && !(variable.referenced || variable.referenced_from_script || variable.subscribable)) {
this.warn(specifier as any, compiler_warnings.unused_export_let(this.name.name, specifier.exported.name));
}
}

67
test/validator/samples/unreferenced-variables/input.svelte
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@ -1,25 +1,48 @@
<script context="module">
var a1 = 1;
let b1 = 1;
const c1 = 1;
var d1 = 1;
let e1 = 1;
const f1 = 1;
export { d1, e1, f1};
export var g1 = 1;
export let h1 = 1;
export const i1 = 1;
export let j1 = () => {};
export const k1 = () => {};
export function l1() {};
var m1 = 1;
let n1 = 1;
const o1 = 1;
function foo1() {
return m1 + n1 + o1;
}
export let p1;
</script>
<script>
var a = 1;
let b = 1;
const c = 1;
var d = 1;
let e = 1;
const f = 1;
export { d, e, f};
export var g = 1;
export let h = 1;
export const i = 1;
export let j = () => {};
export const k = () => {};
export function l() {};
var m = 1;
let n = 1;
const o = 1;
function foo() {
return m + n + o;
var a2 = 1;
let b2 = 1;
const c2 = 1;
var d2 = 1;
let e2 = 1;
const f2 = 1;
export { d2, e2, f2};
export var g2 = 1;
export let h2 = 1;
export const i2 = 1;
export let j2 = () => {};
export const k2 = () => {};
export function l2() {};
var m2 = 1;
let n2 = 1;
const o2 = 1;
function foo2() {
return m2 + n2 + o2;
}
export let p;
export let q;
$p;
export let p2;
export let q2;
$p2;
</script>
{$q}
{$q2}

72
test/validator/samples/unreferenced-variables/warnings.json
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@ -2,76 +2,76 @@
{
"code": "unused-export-let",
"end": {
"character": 103,
"column": 12,
"line": 8
"character": 519,
"column": 13,
"line": 31
},
"message": "Component has unused export property 'd'. If it is for external reference only, please consider using `export const d`",
"pos": 102,
"message": "Component has unused export property 'd2'. If it is for external reference only, please consider using `export const d2`",
"pos": 517,
"start": {
"character": 102,
"character": 517,
"column": 11,
"line": 8
"line": 31
}
},
{
"code": "unused-export-let",
"end": {
"character": 106,
"column": 15,
"line": 8
"character": 523,
"column": 17,
"line": 31
},
"message": "Component has unused export property 'e'. If it is for external reference only, please consider using `export const e`",
"pos": 105,
"message": "Component has unused export property 'e2'. If it is for external reference only, please consider using `export const e2`",
"pos": 521,
"start": {
"character": 105,
"column": 14,
"line": 8
"character": 521,
"column": 15,
"line": 31
}
},
{
"code": "unused-export-let",
"end": {
"character": 130,
"column": 18,
"line": 9
"character": 549,
"column": 19,
"line": 32
},
"message": "Component has unused export property 'g'. If it is for external reference only, please consider using `export const g`",
"pos": 125,
"message": "Component has unused export property 'g2'. If it is for external reference only, please consider using `export const g2`",
"pos": 543,
"start": {
"character": 125,
"character": 543,
"column": 13,
"line": 9
"line": 32
}
},
{
"code": "unused-export-let",
"end": {
"character": 150,
"column": 18,
"line": 10
"character": 570,
"column": 19,
"line": 33
},
"message": "Component has unused export property 'h'. If it is for external reference only, please consider using `export const h`",
"pos": 145,
"message": "Component has unused export property 'h2'. If it is for external reference only, please consider using `export const h2`",
"pos": 564,
"start": {
"character": 145,
"character": 564,
"column": 13,
"line": 10
"line": 33
}
},
{
"code": "unused-export-let",
"end": {
"character": 199,
"column": 25,
"line": 12
"character": 621,
"column": 26,
"line": 35
},
"message": "Component has unused export property 'j'. If it is for external reference only, please consider using `export const j`",
"pos": 187,
"message": "Component has unused export property 'j2'. If it is for external reference only, please consider using `export const j2`",
"pos": 608,
"start": {
"character": 187,
"character": 608,
"column": 13,
"line": 12
"line": 35
}
}
]

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