mirror of https://github.com/status-im/consul.git
74 lines
1.4 KiB
Go
74 lines
1.4 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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package tfgen
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import (
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"bytes"
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"os"
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"strings"
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"github.com/hashicorp/go-hclog"
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"github.com/hashicorp/hcl/v2/hclwrite"
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"github.com/rboyer/safeio"
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)
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func WriteHCLResourceFile(
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logger hclog.Logger,
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res []Resource,
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path string,
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perm os.FileMode,
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) (UpdateResult, error) {
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var text []string
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for _, r := range res {
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val, err := r.Render()
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if err != nil {
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return UpdateResultNone, err
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}
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text = append(text, strings.TrimSpace(val))
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}
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body := strings.Join(text, "\n\n")
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// Ensure it looks tidy
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out := hclwrite.Format(bytes.TrimSpace([]byte(body)))
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return UpdateFileIfDifferent(logger, out, path, perm)
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}
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type UpdateResult int
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const (
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UpdateResultNone UpdateResult = iota
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UpdateResultCreated
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UpdateResultModified
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)
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func UpdateFileIfDifferent(
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logger hclog.Logger,
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body []byte,
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path string,
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perm os.FileMode,
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) (UpdateResult, error) {
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prev, err := os.ReadFile(path)
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result := UpdateResultNone
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if err != nil {
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if !os.IsNotExist(err) {
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return result, err
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}
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logger.Debug("writing new file", "path", path)
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result = UpdateResultCreated
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} else {
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// loaded
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if bytes.Equal(body, prev) {
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return result, nil
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}
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logger.Debug("file has changed", "path", path)
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result = UpdateResultModified
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}
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_, err = safeio.WriteToFile(bytes.NewReader(body), path, perm)
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return result, err
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}
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