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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| /* | ||
| * Copyright (c) 2021 The GoPlus Authors (goplus.org). All rights reserved. | ||
| * | ||
| * 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 modcache | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "errors" | ||
| "log" | ||
| "os/exec" | ||
| "path/filepath" | ||
| "strings" | ||
|
|
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| "golang.org/x/mod/module" | ||
| ) | ||
|
|
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| // ----------------------------------------------------------------------------- | ||
|
|
||
| var ( | ||
| GOMODCACHE = getGOMODCACHE() | ||
| ) | ||
|
|
||
| func getGOMODCACHE() string { | ||
| var buf bytes.Buffer | ||
| var stderr bytes.Buffer | ||
| cmd := exec.Command("go", "env", "GOMODCACHE") | ||
| cmd.Stdout = &buf | ||
| cmd.Stderr = &stderr | ||
| if err := cmd.Run(); err != nil { | ||
| log.Panicln("GOMODCACHE not found:", err) | ||
| } | ||
| return strings.TrimRight(buf.String(), "\n") | ||
| } | ||
|
|
||
| // ----------------------------------------------------------------------------- | ||
|
|
||
| var ( | ||
| ErrNoNeedToDownload = errors.New("no need to download") | ||
| ) | ||
|
|
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| // DownloadCachePath returns download cache path of a versioned module. | ||
| func DownloadCachePath(mod module.Version) (string, error) { | ||
| if mod.Version == "" { | ||
| return mod.Path, ErrNoNeedToDownload | ||
| } | ||
| encPath, err := module.EscapePath(mod.Path) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return filepath.Join(GOMODCACHE, "cache/download", encPath, "@v", mod.Version+".zip"), nil | ||
| } | ||
|
|
||
| // Path returns cache dir of a versioned module. | ||
| func Path(mod module.Version) (string, error) { | ||
| if mod.Version == "" { | ||
| return mod.Path, nil | ||
| } | ||
| encPath, err := module.EscapePath(mod.Path) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return filepath.Join(GOMODCACHE, encPath+"@"+mod.Version), nil | ||
| } | ||
|
|
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| // InPath returns if a path is in GOMODCACHE or not. | ||
| func InPath(path string) bool { | ||
| if strings.HasPrefix(path, GOMODCACHE) { | ||
| name := path[len(GOMODCACHE):] | ||
| return name == "" || name[0] == '/' || name[0] == '\\' | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| // ----------------------------------------------------------------------------- |
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