config: Add new interpolation function - md5
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@ -2,6 +2,7 @@ package config
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import (
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"bytes"
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"crypto/md5"
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"crypto/sha1"
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"crypto/sha256"
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"encoding/base64"
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@ -40,6 +41,7 @@ func Funcs() map[string]ast.Function {
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"join": interpolationFuncJoin(),
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"length": interpolationFuncLength(),
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"lower": interpolationFuncLower(),
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"md5": interpolationFuncMd5(),
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"replace": interpolationFuncReplace(),
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"sha1": interpolationFuncSha1(),
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"sha256": interpolationFuncSha256(),
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@ -599,6 +601,20 @@ func interpolationFuncLower() ast.Function {
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}
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}
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func interpolationFuncMd5() ast.Function {
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return ast.Function{
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ArgTypes: []ast.Type{ast.TypeString},
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ReturnType: ast.TypeString,
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Callback: func(args []interface{}) (interface{}, error) {
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s := args[0].(string)
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h := md5.New()
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h.Write([]byte(s))
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hash := hex.EncodeToString(h.Sum(nil))
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return hash, nil
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},
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}
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}
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// interpolationFuncUpper implements the "upper" function that does
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// string upper casing.
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func interpolationFuncUpper() ast.Function {
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@ -923,6 +923,28 @@ func TestInterpolateFuncBase64Sha256(t *testing.T) {
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})
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}
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func TestInterpolateFuncMd5(t *testing.T) {
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testFunction(t, testFunctionConfig{
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Cases: []testFunctionCase{
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{
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`${md5("tada")}`,
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"ce47d07243bb6eaf5e1322c81baf9bbf",
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false,
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},
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{ // Confirm that we're not trimming any whitespaces
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`${md5(" tada ")}`,
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"aadf191a583e53062de2d02c008141c4",
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false,
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},
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{ // We accept empty string too
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`${md5("")}`,
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"d41d8cd98f00b204e9800998ecf8427e",
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false,
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},
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},
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})
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}
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type testFunctionConfig struct {
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Cases []testFunctionCase
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Vars map[string]ast.Variable
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