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43 lines
1 KiB
Go
43 lines
1 KiB
Go
// Copyright IBM Corp. 2024, 2026
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// SPDX-License-Identifier: BUSL-1.1
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package function
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import (
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"encoding/base64"
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"fmt"
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"os"
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"strings"
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"github.com/zclconf/go-cty/cty"
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"github.com/zclconf/go-cty/cty/function"
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)
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var Filebase64 = function.New(&function.Spec{
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Params: []function.Parameter{
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function.Parameter{
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Name: "path",
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Description: "Read a file and encode it as a base64 string",
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Type: cty.String,
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},
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},
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Type: function.StaticReturnType(cty.String),
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RefineResult: refineNotNull,
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Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
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path := args[0].AsString()
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content, err := os.ReadFile(path)
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if err != nil {
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return cty.NullVal(cty.String), fmt.Errorf("failed to read file %q: %s", path, err)
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}
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out := &strings.Builder{}
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enc := base64.NewEncoder(base64.StdEncoding, out)
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_, err = enc.Write(content)
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if err != nil {
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return cty.NullVal(cty.String), fmt.Errorf("failed to write file %q as base64: %s", path, err)
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}
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_ = enc.Close()
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return cty.StringVal(out.String()), nil
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},
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})
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