77 lines
1.8 KiB
Go
77 lines
1.8 KiB
Go
// Copyright 2015 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// bpglob is the command line tool that checks if the list of files matching a glob has
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// changed, and only updates the output file list if it has changed. It is used to optimize
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// out build.ninja regenerations when non-matching files are added. See
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// github.com/google/blueprint/bootstrap/glob.go for a longer description.
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package main
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import (
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"flag"
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"fmt"
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"os"
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"github.com/google/blueprint/pathtools"
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)
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var (
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out = flag.String("o", "", "file to write list of files that match glob")
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excludes multiArg
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)
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func init() {
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flag.Var(&excludes, "e", "pattern to exclude from results")
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}
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type multiArg []string
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func (m *multiArg) String() string {
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return `""`
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}
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func (m *multiArg) Set(s string) error {
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*m = append(*m, s)
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return nil
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}
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func (m *multiArg) Get() interface{} {
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return m
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}
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func usage() {
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fmt.Fprintf(os.Stderr, "usage: bpglob -o out glob\n")
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flag.PrintDefaults()
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os.Exit(2)
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}
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func main() {
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flag.Parse()
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if *out == "" {
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fmt.Fprintf(os.Stderr, "error: -o is required\n")
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usage()
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}
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if flag.NArg() != 1 {
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usage()
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}
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_, err := pathtools.GlobWithDepFile(flag.Arg(0), *out, *out+".d", excludes)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %s\n", err.Error())
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os.Exit(1)
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}
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}
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