How to check node version programmatically?
There’s a function named checkNodeVersion() in father/src/cli/cli.ts.
This cli file has a function named run and in there, it calls a series of functions:
export async function run(_opts?: IOpts) {
checkNodeVersion();
checkLocal();
setNodeTitle();
setNoDeprecation();
...
}
checkNodeVersion
checkLocal
setNodeTitle
setNoDepreciation
We are interested in checkNodeVersion()
checkNodeVersion
checkNodeVersion is defined in cli/node.ts
export function checkVersion() {
const v = parseInt(process.version.slice(1));
if (v < MIN_NODE_VERSION || v === 15 || v === 17) {
logger.error(
`Your node version ${v} is not supported, please upgrade to ${MIN_NODE_VERSION} or above except 15 or 17.`,
);
process.exit(1);
}
}
You can get the current node version using this method — process.version.slice(1)
In this function, there’s a side-effect. process exits if the node version does not meet the criteria defined in the if block.
logger.error logs the error message when the node version is not supported.
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