isolate: (refactor) extract blacklisting into common package

client/cmd/isolate/common.go

 // Copyright 2015 The LUCI Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //      http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 71 matching lines @@
         // TODO(tandrii): move ArchiveOptions from isolate pkg to here.
         isolate.ArchiveOptions
 }
 
 func (c *isolateFlags) Init(f *flag.FlagSet) {
         c.ArchiveOptions.Init()
         f.StringVar(&c.Isolate, "isolate", "", ".isolate file to load the dependency data from")
         f.StringVar(&c.Isolate, "i", "", "Alias for --isolate")
         f.StringVar(&c.Isolated, "isolated", "", ".isolated file to generate or read")
         f.StringVar(&c.Isolated, "s", "", "Alias for --isolated")
-        f.Var(&c.Blacklist, "blacklist", "List of regexp to use as blacklist filter when uploading directories")
+        f.Var(&c.Blacklist, "blacklist", "List of globs to use as blacklist filter when uploading directories")
         f.Var(&c.ConfigVariables, "config-variable", "Config variables are used to determine which conditions should be matched when loading a .isolate file, default: [].")
         f.Var(&c.PathVariables, "path-variable", "Path variables are used to replace file paths when loading a .isolate file, default: {}")
         f.Var(&c.ExtraVariables, "extra-variable", "Extraneous variables are replaced on the command entry and on paths in the .isolate file but are not considered relative paths.")
 }
 
 // RequiredIsolateFlags specifies which flags are required on the command line
 // being parsed.
 type RequiredIsolateFlags uint
 
 const (
@@ skipping 38 matching lines @@
 }
 
 // loggingFlags configures eventlog logging.
 type loggingFlags struct {
         EventlogEndpoint string
 }
 
 func (lf *loggingFlags) Init(f *flag.FlagSet) {
         f.StringVar(&lf.EventlogEndpoint, "eventlog-endpoint", "", `The URL destination for eventlogs. The special values "prod" or "test" may be used to target the standard prod or test urls repspectively. An empty string disables eventlogging.`)
 }