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Implement indentation in in Lua output

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This commit is contained in:
Kim Alvefur 2023-08-04 12:54:12 +02:00
parent ba90b795da
commit 0debfc3cf9
3 changed files with 88 additions and 24 deletions
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12
pkg/yqlib/doc/usage/lua.md
View File

@ -2,6 +2,7 @@
## Basic example
Given a sample.yml file of:
```yaml
---
hello: world
? look: non-string keys
: True
@ -14,6 +15,15 @@ yq -o=lua '.' sample.yml
```
will output
```lua
return {["hello"]="world";[{["look"]="non-string keys";}]=true;["numbers"]={123,456,};};
return {
["hello"] = "world";
[{
["look"] = "non-string keys";
}] = true;
["numbers"] = {
123,
456,
};
};
```

49
pkg/yqlib/encoder_lua.go
View File

@ -11,6 +11,8 @@ import (
type luaEncoder struct {
docPrefix string
docSuffix string
indent int
indentStr string
unquoted bool
escape *strings.Replacer
}
@ -66,7 +68,7 @@ func NewLuaEncoder(prefs LuaPreferences) Encoder {
"\\t", "\t",
"\\\\", "\\",
)
return &luaEncoder{unescape.Replace(prefs.DocPrefix), unescape.Replace(prefs.DocSuffix), prefs.UnquotedKeys, escape}
return &luaEncoder{unescape.Replace(prefs.DocPrefix), unescape.Replace(prefs.DocSuffix), 0, "\t", prefs.UnquotedKeys, escape}
}
func (le *luaEncoder) PrintDocumentSeparator(writer io.Writer) error {
@ -81,12 +83,28 @@ func (le *luaEncoder) encodeString(writer io.Writer, node *yaml.Node) error {
return writeString(writer, "\""+le.escape.Replace(node.Value)+"\"")
}
func (le *luaEncoder) writeIndent(writer io.Writer) error {
if le.indentStr == "" {
return nil
}
err := writeString(writer, "\n")
if err != nil {
return err
}
return writeString(writer, strings.Repeat(le.indentStr, le.indent))
}
func (le *luaEncoder) encodeArray(writer io.Writer, node *yaml.Node) error {
err := writeString(writer, "{")
if err != nil {
return err
}
le.indent++
for _, child := range node.Content {
err = le.writeIndent(writer)
if err != nil {
return err
}
err := le.Encode(writer, child)
if err != nil {
return err
@ -96,6 +114,13 @@ func (le *luaEncoder) encodeArray(writer io.Writer, node *yaml.Node) error {
return err
}
}
le.indent--
if len(node.Content) != 0 {
err = le.writeIndent(writer)
if err != nil {
return err
}
}
return writeString(writer, "}")
}
@ -130,6 +155,7 @@ func (le *luaEncoder) encodeMap(writer io.Writer, node *yaml.Node) error {
if err != nil {
return err
}
le.indent++
for i, child := range node.Content {
if (i % 2) == 1 {
// value
@ -141,13 +167,18 @@ func (le *luaEncoder) encodeMap(writer io.Writer, node *yaml.Node) error {
if err != nil {
return err
}
} else if le.unquoted && child.Tag == "!!str" && !needsQuoting(child.Value) {
err = writeString(writer, child.Value+"=")
} else {
// key
err = le.writeIndent(writer)
if err != nil {
return err
}
if le.unquoted && child.Tag == "!!str" && !needsQuoting(child.Value) {
err = writeString(writer, child.Value+" = ")
if err != nil {
return err
}
} else {
// key
err := writeString(writer, "[")
if err != nil {
return err
@ -156,12 +187,20 @@ func (le *luaEncoder) encodeMap(writer io.Writer, node *yaml.Node) error {
if err != nil {
return err
}
err = writeString(writer, "]=")
err = writeString(writer, "] = ")
if err != nil {
return err
}
}
}
}
le.indent--
if len(node.Content) != 0 {
err = le.writeIndent(writer)
if err != nil {
return err
}
}
return writeString(writer, "}")
}

31
pkg/yqlib/lua_test.go
View File

@ -11,50 +11,65 @@ import (
var luaScenarios = []formatScenario{
{
description: "Basic example",
input: "hello: world\n? look: non-string keys\n: True\nnumbers: [123,456]\n",
expected: "return {[\"hello\"]=\"world\";[{[\"look\"]=\"non-string keys\";}]=true;[\"numbers\"]={123,456,};};\n",
input: `---
hello: world
? look: non-string keys
: True
numbers: [123,456]
`,
expected: `return {
["hello"] = "world";
[{
["look"] = "non-string keys";
}] = true;
["numbers"] = {
123,
456,
};
};
`,
scenarioType: "encode",
},
{
skipDoc: true,
description: "Sequence",
input: "- a\n- b\n- c\n",
expected: "return {\"a\",\"b\",\"c\",};\n",
expected: "return {\n\t\"a\",\n\t\"b\",\n\t\"c\",\n};\n",
scenarioType: "encode",
},
{
skipDoc: true,
description: "Mapping",
input: "a: b\nc:\n d: e\nf: 0\n",
expected: "return {[\"a\"]=\"b\";[\"c\"]={[\"d\"]=\"e\";};[\"f\"]=0;};\n",
expected: "return {\n\t[\"a\"] = \"b\";\n\t[\"c\"] = {\n\t\t[\"d\"] = \"e\";\n\t};\n\t[\"f\"] = 0;\n};\n",
scenarioType: "encode",
},
{
skipDoc: true,
description: "Scalar str",
input: "str: |\n foo\n bar\n",
expected: "return {[\"str\"]=\"foo\\nbar\\n\";};\n",
expected: "return {\n\t[\"str\"] = \"foo\\nbar\\n\";\n};\n",
scenarioType: "encode",
},
{
skipDoc: true,
description: "Scalar null",
input: "x: null\n",
expected: "return {[\"x\"]=nil;};\n",
expected: "return {\n\t[\"x\"] = nil;\n};\n",
scenarioType: "encode",
},
{
skipDoc: true,
description: "Scalar int",
input: "- 1\n- 2\n- 0x10\n- 0o30\n- -999\n",
expected: "return {1,2,0x10,24,-999,};\n",
expected: "return {\n\t1,\n\t2,\n\t0x10,\n\t24,\n\t-999,\n};\n",
scenarioType: "encode",
},
{
skipDoc: true,
description: "Scalar float",
input: "- 1.0\n- 3.14\n- 1e100\n- .Inf\n- .NAN\n",
expected: "return {1.0,3.14,1e100,(1/0),(0/0),};\n",
expected: "return {\n\t1.0,\n\t3.14,\n\t1e100,\n\t(1/0),\n\t(0/0),\n};\n",
scenarioType: "encode",
},
}