1 | const transforms = require('./util/configTransforms')
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2 |
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3 | class ConfigTransform {
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4 | constructor (options) {
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5 | this.fileDescriptor = options.file
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6 | }
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7 |
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8 | transform (value, checkExisting, files, context) {
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9 | let file
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10 | if (checkExisting) {
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11 | file = this.findFile(files)
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12 | }
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13 | if (!file) {
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14 | file = this.getDefaultFile()
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15 | }
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16 | const { type, filename } = file
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17 |
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18 | const transform = transforms[type]
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19 |
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20 | let source
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21 | let existing
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22 | if (checkExisting) {
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23 | source = files[filename]
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24 | if (source) {
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25 | existing = transform.read({
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26 | source,
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27 | filename,
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28 | context
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29 | })
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30 | }
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31 | }
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32 |
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33 | const content = transform.write({
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34 | source,
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35 | filename,
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36 | context,
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37 | value,
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38 | existing
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39 | })
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40 |
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41 | return {
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42 | filename,
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43 | content
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44 | }
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45 | }
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46 |
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47 | findFile (files) {
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48 | for (const type of Object.keys(this.fileDescriptor)) {
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49 | const descriptors = this.fileDescriptor[type]
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50 | for (const filename of descriptors) {
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51 | if (files[filename]) {
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52 | return { type, filename }
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53 | }
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54 | }
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55 | }
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56 | }
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57 |
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58 | getDefaultFile () {
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59 | const [type] = Object.keys(this.fileDescriptor)
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60 | const [filename] = this.fileDescriptor[type]
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61 | return { type, filename }
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62 | }
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63 | }
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64 |
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65 | module.exports = ConfigTransform
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