Running NPM scripts sequentially
Javascriptnode.jsNpmCmdJavascript Problem Overview
Let's say I have
"scripts": {
"pre-build": "echo \"Welcome\" && exit 1",
"build_logic": "start cmd.exe @cmd /k \"yo esri-appbuilder-js:widget && exit 1\"",
"post_build": "start C:\\WebAppBuilderForArcGIS\\startupShortcut",
"exit" : "start cmd.exe @cmd /k \"echo \"goodbye\" && exit 1\""
},
What NPM command can I run to let all of these scripts launch sequentially. When I use pre/post fixing they launch sequentially but they don't wait for the parent script to finish before executing. I am assuming the only solution is like: https://stackoverflow.com/q/25371192/3174123 ? I know this can be done with Gulp but I would like to stick with NPM for now to explore its capabilities. Thanks for any help!
Javascript Solutions
Solution 1 - Javascript
Invoke these scripts via npm run and chain them with double ampersand &&
:
npm run pre-build && npm run build_logic && npm run post_build && npm run exit
Explanation:
- Use
&&
(double ampersand) for sequential execution. - Use
&
(single ampersand) for parallel execution.
Solution 2 - Javascript
Following @Mobiletainment's great answer, you can also use npm-run-all to make the command much shorter and much more readable. In your case:
"scripts": {
...
"build": "run-s pre-build build_logic post_build exit"
}
run-s
is a shortcut npm-run-all
provides, that runs all the given npm-scripts sequentially, hence the -s
(run-s
is a shorter version of npm-run-all -s
).
Solution 3 - Javascript
You can prefix your scripts pre
and post
so they will execute automatically:
"scripts": {
"prebuild": "echo \"Welcome\" && exit 1",
"build": "start cmd.exe @cmd /k \"yo esri-appbuilder-js:widget && exit 1\"",
"postbuild": "start C:\\WebAppBuilderForArcGIS\\startupShortcut",
"exit" : "start cmd.exe @cmd /k \"echo \"goodbye\" && exit 1\""
}
then run npm run build
Solution 4 - Javascript
You could just string them into another script. "start": "pre-build && build_logic && post_build && exit"
Solution 5 - Javascript
You can use npm-run-all to combine multiple commands in a lot of different ways
For example, if you had the following scripts in your package.json
:
"scripts": {
"clean": "rimraf dist",
"lint": "eslint src",
"build": "babel src -o lib"
}
You could run them all sequentially like this:
$ npm-run-all clean lint build
See this question for how to run multiple npm commands in parallel
Solution 6 - Javascript
you can try:
"scripts": {
"clean-dist": "rm -f ./dist/*.js && rm -f ./dist/*.map",
"build": "npm run clean-dist && parcel build ./packages/index.html"
},
Solution 7 - Javascript
Sequential & Parallel Mix Example
In case you need a mix, here's what I did to ensure command_1 runs and completes first, while command_2a and command_2b can run in parallel.
"dev": "yarn command_1 && (yarn command_2a & yarn command_2b)"
Practical Example:
"dev": "yarn buildPackage && (yarn watchPackageSource & yarn watchExamplePage)"