Support NO_COLOR environment variable

src/bin/main.rs

@@ -231,8 +231,11 @@ fn run_with_input(cli: Cli, input: impl Input) -> Result<()> {
     match output_format {
         SerializationFormat::Json => {
             let is_stdout_terminal = stdout().is_terminal();
+            let no_color_from_env = || std::env::var_os("NO_COLOR").is_some_and(|s| !s.is_empty());
             let should_colorize_output = cli.output_format.color_output
-                || (is_stdout_terminal && !cli.output_format.monochrome_output);
+                || (is_stdout_terminal
+                    && !cli.output_format.monochrome_output
+                    && !no_color_from_env());
             let color_styler = should_colorize_output.then(get_json_style);
 
             for value in result_iterator {

tests/cli/color_output.stdout

@@ -0,0 +1,6 @@
+1
+"a"
+[
+  "a",
+  "b"
+]

tests/cli/color_output.toml

@@ -0,0 +1,9 @@
+args = [ "-C" ]
+
+stdin = '''
+1
+"a"
+["a", "b"]
+'''
+
+# stdout in .stdout file

tests/cli/no_color_and_color.toml

@@ -0,0 +1,12 @@
+args = [ "-C" ]
+
+[env.add]
+NO_COLOR = "1"
+
+stdin = '''
+1
+"a"
+["a", "b"]
+'''
+
+# stdout in .stdout file