andres-portainer
59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
package stackutils
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import (
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"fmt"
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"maps"
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"os"
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"path"
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"strings"
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portainer "github.com/portainer/portainer/api"
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"github.com/portainer/portainer/api/filesystem"
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"github.com/compose-spec/compose-go/v2/dotenv"
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)
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// BuildEnvMap builds the environment variable map for stack validation/loading.
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// Priority (lowest to highest): OS env, .env file, stack.Env
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//
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// stack.Env values are parsed through the same dotenv rules as the env file
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// consumed by the actual deployment (see createEnvFile in api/exec/compose_stack.go),
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// so that quoted values (e.g. API_PORT="8005") are interpreted identically during
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// validation and deployment.
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func BuildEnvMap(stack *portainer.Stack) (map[string]string, error) {
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env := make(map[string]string, len(os.Environ()))
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for _, e := range os.Environ() {
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k, v, _ := strings.Cut(e, "=")
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env[k] = v
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}
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dotEnvPath := filesystem.JoinPaths(stack.ProjectPath, path.Dir(stack.EntryPoint), ".env")
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if dotVars, err := dotenv.Read(dotEnvPath); err == nil {
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maps.Copy(env, dotVars)
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}
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if len(stack.Env) == 0 {
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return env, nil
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}
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var stackEnvFile strings.Builder
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for _, pair := range stack.Env {
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stackEnvFile.WriteString(pair.Name)
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stackEnvFile.WriteString("=")
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stackEnvFile.WriteString(pair.Value)
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stackEnvFile.WriteString("\n")
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}
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stackVars, err := dotenv.ParseWithLookup(strings.NewReader(stackEnvFile.String()), func(k string) (string, bool) {
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v, ok := env[k]
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return v, ok
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})
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if err != nil {
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return nil, fmt.Errorf("failed to parse stack environment variables: %w", err)
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}
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maps.Copy(env, stackVars)
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return env, nil
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}
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