add purge-version --version command, close #549 (#555)

scripts/binary/util/upload.coffee

@@ -6,7 +6,9 @@ check = require("check-more-types")
 cp = require("child_process")
 fs = require("fs")
 os = require("os")
+Promise = require("bluebird")
 {configFromEnvOrJsonFile, filenameToShellVariable} = require('@cypress/env-or-json-file')
+konfig  = require("../../../packages/server/lib/konfig")
 
 getS3Credentials = () ->
   key = path.join('scripts', 'binary', 'support', '.aws-credentials.json')
@@ -58,6 +60,7 @@ makeCloudflarePurgeCommand = (url) ->
   else
     throw new Error("Cannot form Cloudflare purge command without credentials")
 
+# purges a given url from Cloudflare
 purgeCache = (url) ->
   la(check.url(url), "missing url to purge", url)
 
@@ -72,6 +75,34 @@ purgeCache = (url) ->
       console.log("#purgeCache: #{url}")
       resolve()
 
+getDestktopUrl = (version, osName, zipName) ->
+  url = [konfig("cdn_url"), "desktop", version, osName, zipName].join("/")
+  url
+
+# purges desktop application url from Cloudflare cache
+purgeDesktopAppFromCache = ({version, platform, zipName}) ->
+  la(check.unemptyString(version), "missing desktop version", version)
+  la(check.unemptyString(platform), "missing platform", platform)
+  la(check.unemptyString(zipName), "missing zip filename")
+  la(check.extension("zip", zipName),
+    "zip filename should end with .zip", zipName)
+
+  osName = getUploadNameByOs(platform)
+  la(check.unemptyString(osName), "missing osName", osName)
+  url = getDestktopUrl(version, osName, zipName)
+  purgeCache(url)
+
+# purges links to desktop app for all platforms
+# for a given version
+purgeDesktopAppAllPlatforms = (version, zipName) ->
+  la(check.unemptyString(version), "missing desktop version", version)
+  la(check.unemptyString(zipName), "missing zipName", zipName)
+
+  platforms = ["darwin", "linux", "win32"]
+  console.log("purging all desktop links for version #{version} from Cloudflare")
+  Promise.mapSeries platforms, (platform) ->
+    purgeDesktopAppFromCache({version, platform, zipName})
+
 getUploadNameByOs = (osName = os.platform()) ->
   uploadNames = {
     darwin: "osx64"
@@ -91,6 +122,8 @@ module.exports = {
   getS3Credentials,
   getPublisher,
   purgeCache,
+  purgeDesktopAppFromCache,
+  purgeDesktopAppAllPlatforms,
   getUploadNameByOs,
   saveUrl
 }