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rOACCT/node_modules/@emotion/babel-plugin/src/utils/get-target-class-name.js
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get-target-class-name.js
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			// @flow
			import findRoot from 'find-root'
			import memoize from '@emotion/memoize'
			import nodePath from 'path'
			import hashString from '@emotion/hash'
			import escapeRegexp from 'escape-string-regexp'

			let hashArray = (arr: Array<string>) => hashString(arr.join(''))

			const unsafeRequire = require

			const getPackageRootPath = memoize(filename => findRoot(filename))

			const separator = new RegExp(escapeRegexp(nodePath.sep), 'g')

			const normalizePath = path => nodePath.normalize(path).replace(separator, '/')

			export function getTargetClassName(state: , t: ) {
			if (state.emotionTargetClassNameCount === undefined) {
			state.emotionTargetClassNameCount = 0
			}

			const hasFilepath =
			state.file.opts.filename && state.file.opts.filename !== 'unknown'
			const filename = hasFilepath ? state.file.opts.filename : ''
			// normalize the file path to ignore folder structure
			// outside the current node project and arch-specific delimiters
			let moduleName = ''
			let rootPath = filename

			try {
			rootPath = getPackageRootPath(filename)
			moduleName = unsafeRequire(rootPath + '/package.json').name
			} catch (err) {}

			const finalPath =
			filename === rootPath ? 'root' : filename.slice(rootPath.length)

			const positionInFile = state.emotionTargetClassNameCount++

			const stuffToHash = [moduleName]

			if (finalPath) {
			stuffToHash.push(normalizePath(finalPath))
			} else {
			stuffToHash.push(state.file.code)
			}

			const stableClassName = `e${hashArray(stuffToHash)}${positionInFile}`

			return stableClassName
			}