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Diffstat (limited to 'node_modules/webpack/lib/dependencies/ContextDependencyHelpers.js')
| -rw-r--r-- | node_modules/webpack/lib/dependencies/ContextDependencyHelpers.js | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/dependencies/ContextDependencyHelpers.js b/node_modules/webpack/lib/dependencies/ContextDependencyHelpers.js new file mode 100644 index 0000000..377425b --- /dev/null +++ b/node_modules/webpack/lib/dependencies/ContextDependencyHelpers.js @@ -0,0 +1,232 @@ +/* + MIT License http://www.opensource.org/licenses/mit-license.php + Author Tobias Koppers @sokra +*/ +"use strict"; + +const ContextDependencyHelpers = exports; + +/** + * Escapes regular expression metacharacters + * @param {string} str String to quote + * @returns {string} Escaped string + */ +const quotemeta = str => { + return str.replace(/[-[\]\\/{}()*+?.^$|]/g, "\\$&"); +}; + +const splitContextFromPrefix = prefix => { + const idx = prefix.lastIndexOf("/"); + let context = "."; + if (idx >= 0) { + context = prefix.substr(0, idx); + prefix = `.${prefix.substr(idx)}`; + } + return { + context, + prefix + }; +}; + +const splitQueryFromPostfix = postfix => { + const idx = postfix.indexOf("?"); + let query = ""; + if (idx >= 0) { + query = postfix.substr(idx); + postfix = postfix.substr(0, idx); + } + return { + postfix, + query + }; +}; + +ContextDependencyHelpers.create = ( + Dep, + range, + param, + expr, + options, + contextOptions, + // when parser is not passed in, expressions won't be walked + parser = null +) => { + if (param.isTemplateString()) { + let prefixRaw = param.quasis[0].string; + let postfixRaw = + param.quasis.length > 1 + ? param.quasis[param.quasis.length - 1].string + : ""; + + const valueRange = param.range; + const { context, prefix } = splitContextFromPrefix(prefixRaw); + const { postfix, query } = splitQueryFromPostfix(postfixRaw); + + // When there are more than two quasis, the generated RegExp can be more precise + // We join the quasis with the expression regexp + const innerQuasis = param.quasis.slice(1, param.quasis.length - 1); + const innerRegExp = + options.wrappedContextRegExp.source + + innerQuasis + .map(q => quotemeta(q.string) + options.wrappedContextRegExp.source) + .join(""); + + // Example: `./context/pre${e}inner${e}inner2${e}post?query` + // context: "./context" + // prefix: "./pre" + // innerQuasis: [BEE("inner"), BEE("inner2")] + // (BEE = BasicEvaluatedExpression) + // postfix: "post" + // query: "?query" + // regExp: /^\.\/pre.*inner.*inner2.*post$/ + const regExp = new RegExp( + `^${quotemeta(prefix)}${innerRegExp}${quotemeta(postfix)}$` + ); + const dep = new Dep( + Object.assign( + { + request: context + query, + recursive: options.wrappedContextRecursive, + regExp, + mode: "sync" + }, + contextOptions + ), + range, + valueRange + ); + dep.loc = expr.loc; + const replaces = []; + + param.parts.forEach((part, i) => { + if (i % 2 === 0) { + // Quasis or merged quasi + let range = part.range; + let value = part.string; + if (param.templateStringKind === "cooked") { + value = JSON.stringify(value); + value = value.slice(1, value.length - 1); + } + if (i === 0) { + // prefix + value = prefix; + range = [param.range[0], part.range[1]]; + value = + (param.templateStringKind === "cooked" ? "`" : "String.raw`") + + value; + } else if (i === param.parts.length - 1) { + // postfix + value = postfix; + range = [part.range[0], param.range[1]]; + value = value + "`"; + } else if ( + part.expression && + part.expression.type === "TemplateElement" && + part.expression.value.raw === value + ) { + // Shortcut when it's a single quasi and doesn't need to be replaced + return; + } + replaces.push({ + range, + value + }); + } else { + // Expression + if (parser) { + parser.walkExpression(part.expression); + } + } + }); + + dep.replaces = replaces; + dep.critical = + options.wrappedContextCritical && + "a part of the request of a dependency is an expression"; + return dep; + } else if ( + param.isWrapped() && + ((param.prefix && param.prefix.isString()) || + (param.postfix && param.postfix.isString())) + ) { + let prefixRaw = + param.prefix && param.prefix.isString() ? param.prefix.string : ""; + let postfixRaw = + param.postfix && param.postfix.isString() ? param.postfix.string : ""; + const prefixRange = + param.prefix && param.prefix.isString() ? param.prefix.range : null; + const postfixRange = + param.postfix && param.postfix.isString() ? param.postfix.range : null; + const valueRange = param.range; + const { context, prefix } = splitContextFromPrefix(prefixRaw); + const { postfix, query } = splitQueryFromPostfix(postfixRaw); + const regExp = new RegExp( + `^${quotemeta(prefix)}${options.wrappedContextRegExp.source}${quotemeta( + postfix + )}$` + ); + const dep = new Dep( + Object.assign( + { + request: context + query, + recursive: options.wrappedContextRecursive, + regExp, + mode: "sync" + }, + contextOptions + ), + range, + valueRange + ); + dep.loc = expr.loc; + const replaces = []; + if (prefixRange) { + replaces.push({ + range: prefixRange, + value: JSON.stringify(prefix) + }); + } + if (postfixRange) { + replaces.push({ + range: postfixRange, + value: JSON.stringify(postfix) + }); + } + dep.replaces = replaces; + dep.critical = + options.wrappedContextCritical && + "a part of the request of a dependency is an expression"; + + if (parser && param.wrappedInnerExpressions) { + for (const part of param.wrappedInnerExpressions) { + if (part.expression) parser.walkExpression(part.expression); + } + } + + return dep; + } else { + const dep = new Dep( + Object.assign( + { + request: options.exprContextRequest, + recursive: options.exprContextRecursive, + regExp: options.exprContextRegExp, + mode: "sync" + }, + contextOptions + ), + range, + param.range + ); + dep.loc = expr.loc; + dep.critical = + options.exprContextCritical && + "the request of a dependency is an expression"; + + if (parser) { + parser.walkExpression(param.expression); + } + + return dep; + } +}; |