Fixed property decode for github actions

acceptance_tests/inputs-format.sh

@@ -23,6 +23,23 @@ EOM
   assertEquals "$expected" "$X"
 }
 
+testInputPropertiesGitHubAction() {
+  cat >test.properties <<EOL
+mike.things = hello
+EOL
+
+  read -r -d '' expected << EOM
+mike:
+  things: hello
+EOM
+
+  X=$(cat /dev/null | ./yq e -p=props test.properties)
+  assertEquals "$expected" "$X"
+
+  X=$(cat /dev/null | ./yq ea -p=props test.properties)
+  assertEquals "$expected" "$X"
+}
+
 testInputXml() {
   cat >test.yml <<EOL
 <cat legs="4">BiBi</cat>

pkg/yqlib/decoder.go

@@ -0,0 +1,34 @@
+package yqlib
+
+import (
+	"fmt"
+	"io"
+
+	yaml "gopkg.in/yaml.v3"
+)
+
+type InputFormat uint
+
+const (
+	YamlInputFormat = 1 << iota
+	XMLInputFormat
+	PropertiesInputFormat
+)
+
+type Decoder interface {
+	Init(reader io.Reader)
+	Decode(node *yaml.Node) error
+}
+
+func InputFormatFromString(format string) (InputFormat, error) {
+	switch format {
+	case "yaml", "y":
+		return YamlInputFormat, nil
+	case "xml", "x":
+		return XMLInputFormat, nil
+	case "props", "p":
+		return PropertiesInputFormat, nil
+	default:
+		return 0, fmt.Errorf("unknown format '%v' please use [yaml|xml|props]", format)
+	}
+}

pkg/yqlib/decoder_properties.go

@@ -83,9 +83,14 @@ func (dec *propertiesDecoder) Decode(rootYamlNode *yaml.Node) error {
 		return io.EOF
 	}
 	buf := new(bytes.Buffer)
+
 	if _, err := buf.ReadFrom(dec.reader); err != nil {
 		return err
 	}
+	if buf.Len() == 0 {
+		dec.finished = true
+		return io.EOF
+	}
 	properties, err := properties.LoadString(buf.String())
 	if err != nil {
 		return err

pkg/yqlib/decoder_xml.go

@@ -2,7 +2,6 @@ package yqlib
 
 import (
 	"encoding/xml"
-	"fmt"
 	"io"
 	"strings"
 	"unicode"
@@ -11,27 +10,6 @@ import (
 	yaml "gopkg.in/yaml.v3"
 )
 
-type InputFormat uint
-
-const (
-	YamlInputFormat = 1 << iota
-	XMLInputFormat
-	PropertiesInputFormat
-)
-
-func InputFormatFromString(format string) (InputFormat, error) {
-	switch format {
-	case "yaml", "y":
-		return YamlInputFormat, nil
-	case "xml", "x":
-		return XMLInputFormat, nil
-	case "props", "p":
-		return PropertiesInputFormat, nil
-	default:
-		return 0, fmt.Errorf("unknown format '%v' please use [yaml|xml]", format)
-	}
-}
-
 type xmlDecoder struct {
 	reader          io.Reader
 	attributePrefix string
@@ -156,6 +134,7 @@ func (dec *xmlDecoder) Decode(rootYamlNode *yaml.Node) error {
 	if err != nil {
 		return err
 	} else if firstNode.Tag == "!!null" {
+		dec.finished = true
 		return io.EOF
 	}
 	rootYamlNode.Kind = yaml.DocumentNode

pkg/yqlib/decoder_yaml.go

@@ -6,11 +6,6 @@ import (
 	yaml "gopkg.in/yaml.v3"
 )
 
-type Decoder interface {
-	Init(reader io.Reader)
-	Decode(node *yaml.Node) error
-}
-
 type yamlDecoder struct {
 	decoder yaml.Decoder
 }

pkg/yqlib/doc/usage/properties.md

@@ -144,3 +144,16 @@ person.pets.0 = dog
 person.food.0 = pizza
 ```
 
+## Empty doc
+Given a sample.properties file of:
+```properties
+
+```
+then
+```bash
+yq -p=props sample.properties
+```
+will output
+```yaml
+```
+

pkg/yqlib/properties_test.go

@@ -90,6 +90,13 @@ var propertyScenarios = []formatScenario{
 		expected:     expectedUpdatedProperties,
 		scenarioType: "roundtrip",
 	},
+	{
+		description:  "Empty doc",
+		skipDoc:      true,
+		input:        "",
+		expected:     "",
+		scenarioType: "decode",
+	},
 }
 
 func documentEncodePropertyScenario(w *bufio.Writer, s formatScenario) {