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feat: include only some files #8

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feat: include only some files #8

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23 changes: 19 additions & 4 deletions hot-reload.js
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
const includes = []

const filesInDirectory = dir => new Promise (resolve =>

dir.createReader ().readEntries (entries =>
Expand All @@ -13,9 +15,15 @@ const filesInDirectory = dir => new Promise (resolve =>
)
)

const timestampForFilesInDirectory = dir =>
filesInDirectory (dir).then (files =>
files.map (f => f.name + f.lastModifiedDate).join ())
const timestampForFilesInDirectory = dir => {
return filesInDirectory (dir).then (files => {
if (includes.length && !includes.every(i => files.some(f => i === f.name))) return;
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Can you please clarify what that line does?

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@xpl It checks if the user has specified any required includes, and if so, checks if not all of the files specified for inclusion actually exist in this timeout cycle - if any of the specified includes don't exist, it short-circuits so that we will wait for the next cycle to check again, hoping all the required files will exist then.


return files
.filter(f => includes.length ? includes.includes(f.name) : true)
.map (f => f.name + f.lastModifiedDate).join ()
})
}

const reload = () => {

Expand All @@ -31,7 +39,7 @@ const watchChanges = (dir, lastTimestamp) => {

timestampForFilesInDirectory (dir).then (timestamp => {

if (!lastTimestamp || (lastTimestamp === timestamp)) {
if (!timestamp || !lastTimestamp || (lastTimestamp === timestamp)) {
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In what cases timestamp is nonexistent?

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@AndersDJohnson AndersDJohnson May 28, 2019 •
edited
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@xpl Since we generate timestamp from the set of files filtered by includes, if none of the included files exist, it may end up an empty string ('' from joining []), which is falsy. In this case, since none of the required files exist, we want to execute the timeout again, to wait for them to exist before reloading.


setTimeout (() => watchChanges (dir, timestamp), 1000) // retry after 1s

Expand All @@ -50,3 +58,10 @@ chrome.management.getSelf (self => {
chrome.runtime.getPackageDirectoryEntry (dir => watchChanges (dir))
}
})

if (typeof module === 'object') {
exports.include = (files) => {
includes.push(...files)
}
}