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85 lines
2.0 KiB
Go
85 lines
2.0 KiB
Go
/*
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Copyright 2020 The Compose Specification Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package dotenv
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import (
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"bytes"
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"os"
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"path/filepath"
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"github.com/pkg/errors"
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)
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func GetEnvFromFile(currentEnv map[string]string, workingDir string, filenames []string) (map[string]string, error) {
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envMap := make(map[string]string)
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dotEnvFiles := filenames
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if len(dotEnvFiles) == 0 {
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dotEnvFiles = append(dotEnvFiles, filepath.Join(workingDir, ".env"))
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}
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for _, dotEnvFile := range dotEnvFiles {
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abs, err := filepath.Abs(dotEnvFile)
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if err != nil {
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return envMap, err
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}
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dotEnvFile = abs
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s, err := os.Stat(dotEnvFile)
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if os.IsNotExist(err) {
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if len(filenames) == 0 {
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return envMap, nil
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}
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return envMap, errors.Errorf("Couldn't find env file: %s", dotEnvFile)
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}
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if err != nil {
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return envMap, err
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}
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if s.IsDir() {
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if len(filenames) == 0 {
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return envMap, nil
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}
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return envMap, errors.Errorf("%s is a directory", dotEnvFile)
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}
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b, err := os.ReadFile(dotEnvFile)
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if os.IsNotExist(err) {
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return nil, errors.Errorf("Couldn't read env file: %s", dotEnvFile)
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}
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if err != nil {
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return envMap, err
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}
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env, err := ParseWithLookup(bytes.NewReader(b), func(k string) (string, bool) {
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v, ok := currentEnv[k]
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if ok {
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return v, true
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}
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v, ok = envMap[k]
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return v, ok
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})
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if err != nil {
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return envMap, errors.Wrapf(err, "failed to read %s", dotEnvFile)
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}
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for k, v := range env {
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envMap[k] = v
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}
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}
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return envMap, nil
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}
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