feat: implement std.equalsIgnoreCase (#692)

Author: rohitjangid

builtins.go

@@ -1289,6 +1289,18 @@ func builtinIsEmpty(i *interpreter, strv value) (value, error) {
 	return makeValueBoolean(len(sStr) == 0), nil
 }
 
+func builtinEqualsIgnoreCase(i *interpreter, sv1, sv2 value) (value, error) {
+	s1, err := i.getString(sv1)
+	if err != nil {
+		return nil, err
+	}
+	s2, err := i.getString(sv2)
+	if err != nil {
+		return nil, err
+	}
+	return makeValueBoolean(strings.EqualFold(s1.getGoString(), s2.getGoString())), nil
+}
+
 func base64DecodeGoBytes(i *interpreter, str string) ([]byte, error) {
 	strLen := len(str)
 	if strLen%4 != 0 {
@@ -2358,6 +2370,7 @@ var funcBuiltins = buildBuiltinMap([]builtin{
 	&ternaryBuiltin{name: "splitLimit", function: builtinSplitLimit, params: ast.Identifiers{"str", "c", "maxsplits"}},
 	&ternaryBuiltin{name: "strReplace", function: builtinStrReplace, params: ast.Identifiers{"str", "from", "to"}},
 	&unaryBuiltin{name: "isEmpty", function: builtinIsEmpty, params: ast.Identifiers{"str"}},
+	&binaryBuiltin{name: "equalsIgnoreCase", function: builtinEqualsIgnoreCase, params: ast.Identifiers{"str1", "str2"}},
 	&unaryBuiltin{name: "base64Decode", function: builtinBase64Decode, params: ast.Identifiers{"str"}},
 	&unaryBuiltin{name: "base64DecodeBytes", function: builtinBase64DecodeBytes, params: ast.Identifiers{"str"}},
 	&unaryBuiltin{name: "parseInt", function: builtinParseInt, params: ast.Identifiers{"str"}},

linter/internal/types/stdlib.go

@@ -72,24 +72,25 @@ func prepareStdlib(g *typeGraph) {
 
 		// String Manipulation
 
-		"toString":    g.newSimpleFuncType(stringType, "a"),
-		"codepoint":   g.newSimpleFuncType(numberType, "str"),
-		"char":        g.newSimpleFuncType(stringType, "n"),
-		"substr":      g.newSimpleFuncType(stringType, "str", "from", "len"),
-		"findSubstr":  g.newSimpleFuncType(numberArrayType, "pat", "str"),
-		"startsWith":  g.newSimpleFuncType(boolType, "a", "b"),
-		"endsWith":    g.newSimpleFuncType(boolType, "a", "b"),
-		"stripChars":  g.newSimpleFuncType(stringType, "str", "chars"),
-		"lstripChars": g.newSimpleFuncType(stringType, "str", "chars"),
-		"rstripChars": g.newSimpleFuncType(stringType, "str", "chars"),
-		"split":       g.newSimpleFuncType(arrayOfString, "str", "c"),
-		"splitLimit":  g.newSimpleFuncType(arrayOfString, "str", "c", "maxsplits"),
-		"strReplace":  g.newSimpleFuncType(stringType, "str", "from", "to"),
-		"asciiUpper":  g.newSimpleFuncType(stringType, "str"),
-		"asciiLower":  g.newSimpleFuncType(stringType, "str"),
-		"stringChars": g.newSimpleFuncType(stringType, "str"),
-		"format":      g.newSimpleFuncType(stringType, "str", "vals"),
-		"isEmpty":     g.newSimpleFuncType(boolType, "str"),
+		"toString":         g.newSimpleFuncType(stringType, "a"),
+		"codepoint":        g.newSimpleFuncType(numberType, "str"),
+		"char":             g.newSimpleFuncType(stringType, "n"),
+		"substr":           g.newSimpleFuncType(stringType, "str", "from", "len"),
+		"findSubstr":       g.newSimpleFuncType(numberArrayType, "pat", "str"),
+		"startsWith":       g.newSimpleFuncType(boolType, "a", "b"),
+		"endsWith":         g.newSimpleFuncType(boolType, "a", "b"),
+		"stripChars":       g.newSimpleFuncType(stringType, "str", "chars"),
+		"lstripChars":      g.newSimpleFuncType(stringType, "str", "chars"),
+		"rstripChars":      g.newSimpleFuncType(stringType, "str", "chars"),
+		"split":            g.newSimpleFuncType(arrayOfString, "str", "c"),
+		"splitLimit":       g.newSimpleFuncType(arrayOfString, "str", "c", "maxsplits"),
+		"strReplace":       g.newSimpleFuncType(stringType, "str", "from", "to"),
+		"asciiUpper":       g.newSimpleFuncType(stringType, "str"),
+		"asciiLower":       g.newSimpleFuncType(stringType, "str"),
+		"stringChars":      g.newSimpleFuncType(stringType, "str"),
+		"format":           g.newSimpleFuncType(stringType, "str", "vals"),
+		"isEmpty":          g.newSimpleFuncType(boolType, "str"),
+		"equalsIgnoreCase": g.newSimpleFuncType(boolType, "str1", "str2"),
 		// TODO(sbarzowski) Fix when they match the documentation
 		"escapeStringBash":    g.newSimpleFuncType(stringType, "str_"),
 		"escapeStringDollars": g.newSimpleFuncType(stringType, "str_"),

testdata/builtinEqualsIgnoreCase.golden

@@ -0,0 +1 @@
+true

testdata/builtinEqualsIgnoreCase.jsonnet

@@ -0,0 +1 @@
+std.equalsIgnoreCase("foo", "FOO")

testdata/builtinEqualsIgnoreCase.linter.golden

@@ -0,0 +1 @@
+false

testdata/builtinEqualsIgnoreCase2.golden

@@ -0,0 +1 @@
+std.equalsIgnoreCase("foo", "bar")