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2 lines
11 KiB
JavaScript
2 lines
11 KiB
JavaScript
10 months ago
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import*as e from"fs";import*as t from"glob";import*as s from"path";import*as r from"postcss";import o from"postcss-selector-parser";import{promisify as i}from"util";function a(e,t){t&&t.forEach(e.add,e)}class ExtractorResultSets{constructor(e){this.undetermined=new Set,this.attrNames=new Set,this.attrValues=new Set,this.classes=new Set,this.ids=new Set,this.tags=new Set,this.merge(e)}merge(e){return Array.isArray(e)?a(this.undetermined,e):e instanceof ExtractorResultSets?(a(this.undetermined,e.undetermined),a(this.attrNames,e.attrNames),a(this.attrValues,e.attrValues),a(this.classes,e.classes),a(this.ids,e.ids),a(this.tags,e.tags)):(a(this.undetermined,e.undetermined),e.attributes&&(a(this.attrNames,e.attributes.names),a(this.attrValues,e.attributes.values)),a(this.classes,e.classes),a(this.ids,e.ids),a(this.tags,e.tags)),this}hasAttrName(e){return this.attrNames.has(e)||this.undetermined.has(e)}someAttrValue(e){for(const t of this.attrValues)if(e(t))return!0;for(const t of this.undetermined)if(e(t))return!0;return!1}hasAttrPrefix(e){return this.someAttrValue((t=>t.startsWith(e)))}hasAttrSuffix(e){return this.someAttrValue((t=>t.endsWith(e)))}hasAttrSubstr(e){return e.trim().split(" ").every((e=>this.someAttrValue((t=>t.includes(e)))))}hasAttrValue(e){return this.attrValues.has(e)||this.undetermined.has(e)}hasClass(e){return this.classes.has(e)||this.undetermined.has(e)}hasId(e){return this.ids.has(e)||this.undetermined.has(e)}hasTag(e){return this.tags.has(e)||this.undetermined.has(e)}}const n=["*",":root",":after",":before"],c={css:[],content:[],defaultExtractor:e=>e.match(/[A-Za-z0-9_-]+/g)||[],extractors:[],fontFace:!1,keyframes:!1,rejected:!1,rejectedCss:!1,sourceMap:!1,stdin:!1,stdout:!1,variables:!1,safelist:{standard:[],deep:[],greedy:[],variables:[],keyframes:[]},blocklist:[],skippedContentGlobs:[],dynamicAttributes:[]};class VariableNode{constructor(e){this.nodes=[],this.isUsed=!1,this.value=e}}class VariablesStructure{constructor(){this.nodes=new Map,this.usedVariables=new Set,this.safelist=[]}addVariable(e){const{prop:t}=e;if(this.nodes.has(t)){const s=new VariableNode(e),r=this.nodes.get(t)||[];this.nodes.set(t,[...r,s])}else{const s=new VariableNode(e);this.nodes.set(t,[s])}}addVariableUsage(e,t){const{prop:s}=e,r=this.nodes.get(s);for(const e of t){const t=e[1];if(this.nodes.has(t)){const e=this.nodes.get(t);null==r||r.forEach((t=>{null==e||e.forEach((e=>t.nodes.push(e)))}))}}}addVariableUsageInProperties(e){for(const t of e){const e=t[1];this.usedVariables.add(e)}}setAsUsed(e){const t=this.nodes.get(e);if(t){const e=[...t];for(;0!==e.length;){const t=e.pop();t&&!t.isUsed&&(t.isUsed=!0,e.push(...t.nodes))}}}removeUnused(){for(const e of this.usedVariables){const t=this.nodes.get(e);if(t)for(const e of t){const t=e.value.value.matchAll(/var\((.+?)[,)]/g);for(const e of t)this.usedVariables.has(e[1])||this.usedVariables.add(e[1])}}for(const e of this.usedVariables)this.setAsUsed(e);for(const[e,t]of this.nodes)for(const s of t)s.isUsed||this.isVariablesSafelisted(e)||s.value.remove()}isVariablesSafelisted(e){return this.safelist.some((t=>"string"==typeof t?t===e:t.test(e)))}}const l={access:i(e.access),readFile:i(e.readFile)};function u(e=[]){return Array.isArray(e)?{...c.safelist,standard:e}:{...c.safelist,...e}}async function d(e="purgecss.config.js"){let t;try{const r=s.resolve(process.cwd(),e);t=await import(r)}catch(e){if(e instanceof Error)throw new Error(`Error loading the config file ${e.message}`);throw new Error}return{...c,...t,safelist:u(t.safelist)}}async function h(e,t){return new ExtractorResultSets(await t(e))}function f(e,t){switch(t){case"next":return e.text.includes("purgecss ignore");case"start":return e.text.includes("purgecss start ignore");case"end":return e.text.includes("purgecss end ignore")}}function p(...e){const t=new ExtractorResultSets([]);return e.forEach(t.merge,t),t}function m(e){return e.replace(/(^["'])|(["']$)/g,"")}function g(e,t){if(!t.hasAttrName(e.attribute))return!1;if(void 0===e.value)return!0;switch(e.operator){case"$=":return t.hasAttrSuffix(e.value);case"~=":case
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