In the previous article, I talked about projectPath error handling.
In this article, I will explain the following code snippet:
// let's log this and see what is that values its got
const resolvedProjectPath = path.resolve(projectPath)
const projectName = path.basename(resolvedProjectPath)
console.log("resolvedProjectPath", resolvedProjectPath)
console.log("projectName", projectName)
const validation = validateNpmName(projectName)
if (!validation.valid) {
console.error(
`[TEST]::Could not create a project called ${red(
`"${projectName}"`
)} because of npm naming restrictions:`
)
validation.problems.forEach((p) =>
console.error(` ${red(bold('*'))} ${p}`)
)
process.exit(1)
}
The [validate-prop]:: in validate: prop below, I could not find it when I executed the build with invalid project name.
if (!projectPath) {
// Read more about prompts here:
// https://www.npmjs.com/package/prompts
const res = await prompts({
// onPromptState is a function available at
// https://github.com/vercel/next.js/blob/canary/packages/create-next-app/index.ts#L25
onState: onPromptState,
type: 'text',
name: 'path',
message: 'What is your project named?',
initial: 'my-app',
// validates ensures to follow npm package name guidelines
// availabe here: https://www.npmjs.com/package/validate-npm-package-name
validate: (name) => {
const validation = validateNpmName(path.basename(path.resolve(name)))
if (validation.valid) {
return true
}
return '[validate-prop]::Invalid project name: ' + validation.problems[0]
},
})
if (typeof res.path === 'string') {
projectPath = res.path.trim()
}
}
I have updated the console.error with [TEST] and let’s provide an invalid project name and see if this [TEST] is ever logged due to invalid project.
Build the project and execute npx create-my-app INVALIDPROJECTNAME
Conclusion
I wonder what is the purpose of validate property in prompts when this validation error is handled outside of that block. hmm… interesting.
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