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refactor: build plugin pipeline parameters at initialization

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In addition, factorize the pipeline config function to avoid code duplication.
This commit is contained in:
Pierre Vanduynslager
2018-07-10 13:18:58 -04:00
parent eb26254b00
commit 24ce560065
7 changed files with 105 additions and 112 deletions
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lib/plugins/pipeline.js
+7 -6
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@@ -8,10 +8,6 @@ const {extractErrors} = require('../utils');
*
* @typedef {Function} Pipeline
* @param {Any} input Argument to pass to the first step in the pipeline.
* @param {Object} options Pipeline options.
* @param {Boolean} [options.settleAll=false] If `true` all the steps in the pipeline are executed, even if one rejects, if `false` the execution stops after a steps rejects.
* @param {Function} [options.getNextInput=identity] Function called after each step is executed, with the last step input and the current current step result; the returned value will be used as the input of the next step.
* @param {Function} [options.transform=identity] Function called after each step is executed, with the current step result and the step function; the returned value will be saved in the pipeline results.
*
* @return {Array<*>|*} An Array with the result of each step in the pipeline; if there is only 1 step in the pipeline, the result of this step is returned directly.
*
@@ -22,9 +18,14 @@ const {extractErrors} = require('../utils');
* Create a Pipeline with a list of Functions.
*
* @param {Array<Function>} steps The list of Function to execute.
* @param {Object} options Pipeline options.
* @param {Boolean} [options.settleAll=false] If `true` all the steps in the pipeline are executed, even if one rejects, if `false` the execution stops after a steps rejects.
* @param {Function} [options.getNextInput=identity] Function called after each step is executed, with the last step input and the current current step result; the returned value will be used as the input of the next step.
* @param {Function} [options.transform=identity] Function called after each step is executed, with the current step result, the step function and the last step input; the returned value will be saved in the pipeline results.
*
* @return {Pipeline} A Function that execute the `steps` sequencially
*/
module.exports = steps => async (input, {settleAll = false, getNextInput = identity, transform = identity} = {}) => {
module.exports = (steps, {settleAll = false, getNextInput = identity, transform = identity} = {}) => async input => {
const results = [];
const errors = [];
await pReduce(
@@ -33,7 +34,7 @@ module.exports = steps => async (input, {settleAll = false, getNextInput = ident
let result;
try {
// Call the step with the input computed at the end of the previous iteration and save intermediary result
result = await transform(await step(lastInput), step);
result = await transform(await step(lastInput), step, lastInput);
results.push(result);
} catch (err) {
if (settleAll) {