feat: Added --format, -f flag.

Allows printing data in tabular or json format.

cli.odin

@@ -5,6 +5,7 @@ import "core:fmt"
 import "core:io"
 import "core:os"
 import "core:strings"
+import "core:terminal"
 import "core:text/table"
 
 Command :: struct {
@@ -18,6 +19,11 @@ Command :: struct {
 	err:         io.Writer,
 }
 
+Output_Format :: enum {
+	Table,
+	JSON,
+}
+
 CommandInfo :: struct {
 	name:    string,
 	usage:   string,
@@ -288,6 +294,11 @@ at before, restore your backup with:
 		COLOR_FLAGS + "-c, --config-file" + ANSI_RESET + " <path>",
 		`config file (default "~/.envr/config.json")`,
 	)
+	table.row(
+		&tbl,
+		COLOR_FLAGS + "-f, --format" + ANSI_RESET + " 'json'|'table'",
+		`the format of output data. (default 'table', unless piping)`,
+	)
 	write_borderless_table(w, &tbl)
 
 	fmt.wprintf(
@@ -303,6 +314,22 @@ has_flag :: proc(cmd: ^Command, name: string) -> bool {
 	return name in cmd.flags || name in cmd.bool_set
 }
 
+get_format :: proc(cmd: ^Command) -> Output_Format {
+	flags :: []string{"format", "f"}
+	for name in flags {
+		if val, ok := cmd.flags[name]; ok {
+			switch val {
+			case "json":
+				return .JSON
+			case "table":
+				return .Table
+			}
+		}
+	}
+
+	return terminal.is_terminal(os.stdout) ? .Table : .JSON
+}
+
 delete_command :: proc(cmd: ^Command) {
 	bufio.writer_flush(cmd.out_buf)
 	delete(cmd.args)