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Merge pull request #141 from paketo-buildpacks/cache-layer-fix
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| /* | ||
| * Copyright 2018-2022 the original author or 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 | ||
| * | ||
| * https://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 sherpa | ||
|
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||
| import "os" | ||
|
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||
| // Exists returns true if the path exists. | ||
| func Exists(path string) (bool, error) { | ||
| if _, err := os.Stat(path); err == nil { | ||
| return true, nil | ||
| } else if os.IsNotExist(err) { | ||
| return false, nil | ||
| } else { | ||
| return false, err | ||
| } | ||
| } | ||
|
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| // FileExists returns true if the path exists and is a regular file. | ||
| func FileExists(path string) (bool, error) { | ||
| if stat, err := os.Stat(path); err == nil { | ||
| return stat.Mode().IsRegular(), nil | ||
| } else if os.IsNotExist(err) { | ||
| return false, nil | ||
| } else { | ||
| return false, err | ||
| } | ||
| } | ||
|
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||
| // DirExists returns true if the path exists and is a directory. | ||
| func DirExists(path string) (bool, error) { | ||
| if stat, err := os.Stat(path); err == nil { | ||
| return stat.IsDir(), nil | ||
| } else if os.IsNotExist(err) { | ||
| return false, nil | ||
| } else { | ||
| return false, err | ||
| } | ||
| } | ||
|
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||
| // SymlinkExists returns true if the path exists and is a symlink. | ||
| func SymlinkExists(path string) (bool, error) { | ||
| if stat, err := os.Lstat(path); err == nil { | ||
| return stat.Mode()&os.ModeSymlink != 0, nil | ||
| } else if os.IsNotExist(err) { | ||
| return false, nil | ||
| } else { | ||
| return false, err | ||
| } | ||
| } |
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