From b2b021550921fda5d31967f0fb83b830d6aa5e23 Mon Sep 17 00:00:00 2001
From: Turiiya <tobmoj@web.de>
Date: Mon, 25 Mar 2024 03:45:06 +0100
Subject: [PATCH] add `@VMODHASH`

---
 vlib/v/checker/checker.v | 13 +++++++++++++
 vlib/v/parser/comptime.v |  1 +
 vlib/v/token/token.v     |  5 +++--
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index b1cf460ce62ee4..1e95795d774aca 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -3500,6 +3500,19 @@ fn (mut c Checker) at_expr(mut node ast.AtExpr) ast.Type {
 			vmod_file_location := mcache.get_by_file(c.file.path)
 			node.val = os.dir(vmod_file_location.vmod_file)
 		}
+		.vmod_hash {
+			mut mcache := vmod.get_cache()
+			vmod_file_location := mcache.get_by_file(c.file.path)
+			if vmod_file_location.vmod_file.len == 0 {
+				c.error('@VMODHASH can only be used in projects that have a v.mod file',
+					node.pos)
+			}
+			hash := version.githash(os.dir(vmod_file_location.vmod_file), false)
+			if hash == '' {
+				c.error('failed to find commit hash', node.pos)
+			}
+			node.val = hash
+		}
 		.unknown {
 			c.error('unknown @ identifier: ${node.name}. Available identifiers: ${token.valid_at_tokens}',
 				node.pos)
diff --git a/vlib/v/parser/comptime.v b/vlib/v/parser/comptime.v
index 7f3079b6b9e76d..b78218b66ac26d 100644
--- a/vlib/v/parser/comptime.v
+++ b/vlib/v/parser/comptime.v
@@ -403,6 +403,7 @@ fn (mut p Parser) at() ast.AtExpr {
 		'@VEXE' { token.AtKind.vexe_path }
 		'@VEXEROOT' { token.AtKind.vexeroot_path }
 		'@VMODROOT' { token.AtKind.vmodroot_path }
+		'@VMODHASH' { token.AtKind.vmod_hash }
 		'@VROOT' { token.AtKind.vroot_path } // deprecated, use @VEXEROOT or @VMODROOT
 		else { token.AtKind.unknown }
 	}
diff --git a/vlib/v/token/token.v b/vlib/v/token/token.v
index 9e666578fd59c4..b654aac57c13c5 100644
--- a/vlib/v/token/token.v
+++ b/vlib/v/token/token.v
@@ -176,6 +176,7 @@ pub enum AtKind {
 	v_current_hash
 	vmod_file
 	vmodroot_path
+	vmod_hash
 	vroot_path // obsolete
 	vexeroot_path
 	file_path_line_nr
@@ -187,8 +188,8 @@ pub const assign_tokens = [Kind.assign, .plus_assign, .minus_assign, .mult_assig
 	.unsigned_right_shift_assign]
 
 pub const valid_at_tokens = ['@VROOT', '@VMODROOT', '@VEXEROOT', '@FN', '@METHOD', '@MOD', '@STRUCT',
-	'@VEXE', '@FILE', '@LINE', '@COLUMN', '@VHASH', '@VCURRENTHASH', '@VMOD_FILE', '@FILE_LINE',
-	'@LOCATION']
+	'@VEXE', '@FILE', '@LINE', '@COLUMN', '@VHASH', '@VCURRENTHASH', '@VMOD_FILE', '@VMODHASH',
+	'@FILE_LINE', '@LOCATION']
 
 pub const token_str = build_token_str()