From ffb3f9440e258e9f9e5a8a7688f87ac4caa7c0c9 Mon Sep 17 00:00:00 2001
From: Techatrix <19954306+Techatrix@users.noreply.github.com>
Date: Tue, 30 Aug 2022 00:46:13 +0200
Subject: [PATCH] add --show-config-path for querying the config path

---
 src/main.zig | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/main.zig b/src/main.zig
index a462a87..6eafe6e 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -103,6 +103,7 @@ fn parseArgs(
         version,
         config,
         @"enable-debug-log",
+        @"show-config-path",
         @"config-path",
     };
     const arg_id_map = std.ComptimeStringMap(ArgId, comptime blk: {
@@ -126,6 +127,7 @@ fn parseArgs(
             .version = "Prints the compiler version with which the server was compiled.",
             .@"enable-debug-log" = "Enables debug logs.",
             .@"config-path" = "Specify the path to a configuration file specifying LSP behaviour.",
+            .@"show-config-path" = "Prints the path to the configuration file to stdout",
             .config = "Run the ZLS configuration wizard.",
         });
         var info_it = cmd_infos.iterator();
@@ -145,6 +147,7 @@ fn parseArgs(
     var config_path: ?[]const u8 = null;
     errdefer if (config_path) |path| allocator.free(path);
 
+    const stdout = std.io.getStdOut().writer();
     const stderr = std.io.getStdErr().writer();
 
     while (args_it.next()) |tok| {
@@ -173,6 +176,7 @@ fn parseArgs(
             .version => {},
             .@"enable-debug-log" => {},
             .config => {},
+            .@"show-config-path" => {},
             .@"config-path" => {
                 const path = args_it.next() orelse {
                     try stderr.print("Expected configuration file path after --config-path argument.\n", .{});
@@ -202,6 +206,22 @@ fn parseArgs(
     if (specified.get(.@"config-path")) {
         std.debug.assert(config.config_path != null);
     }
+    if (specified.get(.@"show-config-path")) {
+        const new_config = try getConfig(allocator, config.config_path, true);
+        defer if (new_config.config_path) |path| allocator.free(path);
+        defer std.json.parseFree(Config, new_config.config, .{ .allocator = allocator });
+
+        if (new_config.config_path) |path| {
+            const full_path = try std.fs.path.resolve(allocator, &.{ path, "zls.json" });
+            defer allocator.free(full_path);
+
+            try stdout.writeAll(full_path);
+            try stdout.writeByte('\n');
+        } else {
+            logger.err("Failed to find zls.json!\n", .{});
+        }
+        return .exit;
+    }
 
     return .proceed;
 }