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Clean up some dependency trees for runc shim
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* | ||
| Copyright The containerd 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, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "flag" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| ) | ||
|
|
||
| func main() { | ||
| wrFl := flag.Bool("w", false, "Write to file") | ||
| tagsFl := flag.String("tags", "", "Tags to add") | ||
|
|
||
| flag.Parse() | ||
|
|
||
| if flag.NArg() < 1 { | ||
| fmt.Fprintln(os.Stderr, "Usage: go-buildtag <options> <file1> [<file2> <file3> ...]") | ||
| os.Exit(1) | ||
| } | ||
|
|
||
| wr := *wrFl | ||
| tags := *tagsFl | ||
| for i := 0; i < flag.NArg(); i++ { | ||
| p := flag.Arg(i) | ||
| if err := handle(wr, tags, p); err != nil { | ||
| fmt.Fprintln(os.Stderr, p+":", err) | ||
| os.Exit(2) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func handle(wr bool, tags, p string) (retErr error) { | ||
| out := os.Stdout | ||
|
|
||
| rdr, err := os.Open(p) | ||
| if err != nil { | ||
| return fmt.Errorf("could not open source file: %w", err) | ||
| } | ||
| defer rdr.Close() | ||
|
|
||
| if wr { | ||
| f, err := os.Create(p + ".tmp") | ||
| if err != nil { | ||
| return fmt.Errorf("error creatign temp file") | ||
| } | ||
| defer func() { | ||
| if retErr != nil { | ||
| os.Remove(f.Name()) | ||
| } | ||
| }() | ||
|
|
||
| defer f.Close() | ||
| out = f | ||
| } | ||
|
|
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| _, err = fmt.Fprintf(out, "//go:build %s\n\n", tags) | ||
| if err != nil { | ||
| return fmt.Errorf("error writing build tags: %w", err) | ||
| } | ||
|
|
||
| _, err = io.Copy(out, rdr) | ||
| if err != nil { | ||
| return fmt.Errorf("error copying original content to temp file") | ||
| } | ||
|
|
||
| rdr.Close() | ||
| if wr { | ||
| out.Close() | ||
|
|
||
| if err := os.Remove(p); err != nil { | ||
| return fmt.Errorf("error removing original source file: %w", err) | ||
| } | ||
|
|
||
| if err := os.Rename(p+".tmp", p); err != nil { | ||
| return fmt.Errorf("error replacing original source: %w", err) | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } |