fix subproject compiling

meson.build

@@ -6,6 +6,10 @@ project('rz_solver', 'c',
 cc = meson.get_compiler('c')
 rz_core_dep = dependency('rz_core')
 
+py3_exe = import('python').find_installation()
+check_meson_subproject_py = files('sys/check_meson_subproject.py')
+subproject_clean_error_msg = 'Subprojects are not updated. Please run `git clean -dxff subprojects/` to delete all local subprojects directories.'
+
 # handle z3 library
 sys_z3_opt = get_option('use_sys_z3')
 z3_dep = disabler()
@@ -20,6 +24,11 @@ if (sys_z3_opt.auto() and not z3_dep.found()) or sys_z3_opt.disabled()
     z3_dep = z3_proj.get_variable('z3_dep')
 endif
 
+r = run_command(py3_exe, check_meson_subproject_py, 'z3', check: false)
+if r.returncode() == 1
+    error(subproject_clean_error_msg)
+endif
+
 rz_solver_deps = [
     rz_core_dep,
     #rz_rop_dep,

sys/check_meson_subproject.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+#
+# SPDX-FileCopyrightText: 2021 ret2libc <[email protected]>
+# SPDX-FileCopyrightText: 2021 deroad <[email protected]>
+# SPDX-License-Identifier: LGPL-3.0-only
+#
+# NOTE: Lifted from rizinorg/rizin project
+# This script is necessary to make sure people notice a subproject has been
+# changed and need to be updated. Meson does not warn you now (0.56.0)
+
+""" Portable python script to check if subproject is up-to-date and warn if not """
+
+import filecmp
+import os
+import sys
+
+subproject = sys.argv[1]
+meson_root = os.environ["MESON_SOURCE_ROOT"]
+
+subproject_filename = os.path.join(meson_root, "subprojects", subproject + ".wrap")
+
+try:
+    with open(subproject_filename, "r", encoding="utf8") as f:
+        is_wrap_git = False
+        revision = None
+        directory = subproject
+        patch_directory = subproject
+        for l in f:
+            if "wrap-git" in l:
+                is_wrap_git = True
+            elif "wrap-file" in l:
+                is_wrap_file = True
+            elif l.startswith("revision"):
+                revision = l.split("=")[1].strip()
+            elif l.startswith("directory"):
+                directory = l.split("=")[1].strip()
+            elif l.startswith("patch_directory"):
+                patch_directory = l.split("=")[1].strip()
+
+        if is_wrap_git:
+            if not revision:
+                sys.exit(0)
+
+            subproject_dir = os.path.join(meson_root, "subprojects", directory)
+            subproject_git_dir = os.path.join(subproject_dir, ".git")
+            if os.path.isdir(subproject_dir) and os.path.isdir(subproject_git_dir):
+                with open(
+                        os.path.join(subproject_git_dir, "HEAD"), "r", encoding="utf8"
+                ) as f:
+                    head = f.read().strip()
+                # when using a branch name, head is 'refs/heads/<branch>'
+                if head != revision and revision not in head:
+                    sys.exit(1)
+
+        if not patch_directory:
+            sys.exit(0)
+
+        subproject_dir = os.path.join(meson_root, "subprojects", directory)
+        patch_subproject_dir = os.path.join(
+            meson_root, "subprojects", "packagefiles", patch_directory
+        )
+        if os.path.isdir(patch_subproject_dir) and os.path.isdir(subproject_dir):
+            for root, dirs, files in os.walk(patch_subproject_dir, topdown=False):
+                for name in files:
+                    subproject_f = os.path.join(root, name)
+                    subproject_p_f = subproject_f.replace(
+                        patch_subproject_dir, subproject_dir
+                    )
+                    if not os.path.isfile(subproject_f):
+                        sys.exit(2)
+
+                    if not filecmp.cmp(subproject_p_f, subproject_f):
+                        sys.exit(3)
+
+        sys.exit(0)
+except FileNotFoundError:
+    sys.exit(0)