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config(*): watch config across fs deletes, re-creates

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This commit is contained in:
Ben Gotow 2016-09-01 11:03:30 -07:00
parent d26efdb882
commit 3d3cffd6d3
1 changed files with 52 additions and 19 deletions
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71
src/browser/config-persistence-manager.es6
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@ -89,37 +89,70 @@ export default class ConfigPersistenceManager {
}
observe() {
try {
this.watchSubscription = pathWatcher.watch(this.configFilePath, (eventType) => {
if (eventType === 'change' && this.watchSubscription) {
if (Date.now() - this.lastSaveTimstamp < 100) {
return;
}
this.loadSoon();
// watch the config file for edits. This observer needs to be
// replaced if the config file is deleted.
let watcher = null;
const watchCurrentConfigFile = () => {
try {
if (watcher) {
watcher.close();
}
watcher = pathWatcher.watch(this.configFilePath, (e) => {
if (e === 'change') {
this.loadSoon();
}
});
} catch (error) {
this.observeErrorOccurred(error);
}
}
watchCurrentConfigFile();
// watch the config directory (non-recursive) to catch the config file
// being deleted and replaced or atomically edited.
try {
let lastctime = null;
pathWatcher.watch(this.configDirPath, () => {
fs.stat(this.configFilePath, (err, stats) => {
if (err) { return; }
const ctime = stats.ctime.getTime();
if (ctime !== lastctime) {
if (Math.abs(ctime - this.lastSaveTimestamp) > 2000) {
this.loadSoon();
}
watchCurrentConfigFile();
lastctime = ctime;
}
});
})
} catch (error) {
global.errorLogger.reportError(error)
dialog.showMessageBox({
type: 'error',
message: 'Configuration Error',
detail: `
Unable to watch path: ${path.basename(this.configFilePath)}. Make sure you have permissions to
${this.configFilePath}. On linux there are currently problems with watch
sizes.
`,
buttons: ['Okay'],
})
this.observeErrorOccurred(error);
}
}
observeErrorOccurred = (error) => {
global.errorLogger.reportError(error)
dialog.showMessageBox({
type: 'error',
message: 'Configuration Error',
detail: `
Unable to watch path: ${path.basename(this.configFilePath)}. Make sure you have permissions to
${this.configFilePath}. On linux there are currently problems with watch
sizes.
`,
buttons: ['Okay'],
})
}
save = () => {
if (this.userWantsToPreserveErrors) {
return;
}
const allSettings = {'*': this.settings};
const allSettingsJSON = JSON.stringify(allSettings, null, 2);
this.lastSaveTimstamp = Date.now();
this.lastSaveTimestamp = Date.now();
try {
atomicWriteFileSync(this.configFilePath, allSettingsJSON)
this.saveRetries = 0