From 7c839e724571d91cc59fe71ccf00c35296b182b2 Mon Sep 17 00:00:00 2001
From: Richard Simison <rsimison@student.bridgew.edu>
Date: Sun, 3 May 2026 14:27:52 -0400
Subject: [PATCH 1/3] Added the ability to supply your own languages.json file
 which is then used to override any internal language or augment it. To run
 SCC with the new flag input ./scc --languages-file custom.json (filename)

---
 main.go                |  7 +++++++
 processor/processor.go | 19 +++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/main.go b/main.go
index dac0c57c0..886a7d955 100644
--- a/main.go
+++ b/main.go
@@ -538,6 +538,13 @@ func main() {
 		"start as an MCP (Model Context Protocol) server over stdio",
 	)
 
+	flags.StringVar(
+		&processor.LanguagesFile,
+		"languages-file",
+		"",
+		"path to a custom languages.json file to augment or override built-in languages",
+	)
+
 	// If invoked in the format of "scc completion --shell [name of shell]", generate command line completions instead.
 	// With the --shell option, unintentionally triggering shell completions should be highly unlikely.
 	args := os.Args
diff --git a/processor/processor.go b/processor/processor.go
index 2ac57a4b0..c8771cecc 100644
--- a/processor/processor.go
+++ b/processor/processor.go
@@ -3,6 +3,7 @@
 package processor
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 	"os"
@@ -146,6 +147,9 @@ var RemapUnknown = ""
 // RemapAll allows remapping of all files with a string to search the content for
 var RemapAll = ""
 
+// LanguagesFile is the path to a custom languages.json file
+var LanguagesFile = ""
+
 type remapRule struct {
 	pattern  []byte
 	language string
@@ -324,6 +328,21 @@ func ConfigureLazy(lazy bool) {
 // Needs to be called at least once in order for anything to actually happen
 func ProcessConstants() {
 	startTime := makeTimestampNano()
+	if LanguagesFile != "" {
+		data, err := os.ReadFile(LanguagesFile)
+		if err != nil {
+			printError("failed to read languages file: " + err.Error())
+		} else {
+			var customLanguages map[string]Language
+			if err := json.Unmarshal(data, &customLanguages); err != nil {
+				printError("failed to parse languages file: " + err.Error())
+			} else {
+				for name, lang := range customLanguages {
+					languageDatabase[name] = lang
+				}
+			}
+		}
+	}
 	for name, value := range languageDatabase {
 		for _, ext := range value.Extensions {
 			ExtensionToLanguage[ext] = append(ExtensionToLanguage[ext], name)

From 11639f3b5464e393eaa73769781de601f3246fc2 Mon Sep 17 00:00:00 2001
From: Rayze-B <vrajpatel0615@gmail.com>
Date: Tue, 5 May 2026 20:31:21 -0400
Subject: [PATCH 2/3] Added test to confirm languages.json files.

---
 processor/processor_test.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/processor/processor_test.go b/processor/processor_test.go
index b469ff5d7..6069192de 100644
--- a/processor/processor_test.go
+++ b/processor/processor_test.go
@@ -3,6 +3,8 @@
 package processor
 
 import (
+	"encoding/json"
+	"os"
 	"strings"
 	"testing"
 )
@@ -154,3 +156,14 @@ func TestSetupCountAsMultiple(t *testing.T) {
 
 	CountAs = ""
 }
+func TestLanguagesFileIsValidJSON(t *testing.T) {
+	data, err := os.ReadFile("../languages.json")
+	if err != nil {
+		t.Fatal("failed to read languages.json", err)
+	}
+
+	var languages map[string]Language
+	if err := json.Unmarshal(data, &languages); err != nil {
+		t.Error("languages.json is not valid JSON", err)
+	}
+}

From 2ae311195cc1d75876979d6fd58bb976355f501f Mon Sep 17 00:00:00 2001
From: m39johnsonm <m39johnsonm@student.bridgew.edu>
Date: Tue, 5 May 2026 20:36:23 -0400
Subject: [PATCH 3/3] Add test case for invalid JSON in languages.json file

---
 processor/processor_test.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/processor/processor_test.go b/processor/processor_test.go
index 6069192de..2b11ca9df 100644
--- a/processor/processor_test.go
+++ b/processor/processor_test.go
@@ -5,6 +5,7 @@ package processor
 import (
 	"encoding/json"
 	"os"
+	"path/filepath"
 	"strings"
 	"testing"
 )
@@ -167,3 +168,13 @@ func TestLanguagesFileIsValidJSON(t *testing.T) {
 		t.Error("languages.json is not valid JSON", err)
 	}
 }
+
+func TestLanguagesFileInvalidJSON(t *testing.T) {
+	dir, _ := os.MkdirTemp("", "test-languages")
+	langFile := filepath.Join(dir, "languages.json")
+	_ = os.WriteFile(langFile, []byte(`not valid json`), 0644)
+
+	LanguagesFile = langFile
+	// should not panic
+	ProcessConstants()
+}