[PATCH] Use meson's detected python installation

[Peter Foley <pefoley@google.com>]

Relying on `python3` to be avilable in $PATH doesn't work in some build
environments. Update the build files to use the found python binary
explicitly.

Signed-off-by: Peter Foley <pefoley@google.com>
---
 block/meson.build   |  6 ++----
 meson.build         | 10 +++++-----
 plugins/meson.build |  2 +-
 3 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/block/meson.build b/block/meson.build
index 34b1b2a30630214959630d5543181bc82a54d2b3..67e9bee1210307ff15ca87ba0f5e7f785df15042 100644
--- a/block/meson.build
+++ b/block/meson.build
@@ -139,14 +139,12 @@ if get_option('dmg').allowed()
   endforeach
 endif
 
-module_block_py = find_program('../scripts/modules/module_block.py')
 module_block_h = custom_target('module_block.h',
                                output: 'module_block.h',
                                input: modsrc,
-                               command: [module_block_py, '@OUTPUT0@', modsrc])
+                               command: [python, files('../scripts/modules/module_block.py'), '@OUTPUT0@', modsrc])
 block_ss.add(module_block_h)
 
-wrapper_py = find_program('../scripts/block-coroutine-wrapper.py')
 block_gen_c = custom_target('block-gen.c',
                             output: 'block-gen.c',
                             input: files(
@@ -158,7 +156,7 @@ block_gen_c = custom_target('block-gen.c',
                                       '../include/system/block-backend-io.h',
                                       'coroutines.h'
                                       ),
-                            command: [wrapper_py, '@OUTPUT@', '@INPUT@'])
+                            command: [python, files('../scripts/block-coroutine-wrapper.py'), '@OUTPUT@', '@INPUT@'])
 block_ss.add(block_gen_c)
 
 block_ss.add(files('stream.c'))
diff --git a/meson.build b/meson.build
index fa6186db33435c26d06dce2971a9f536250607e0..6e8baf3deb13c172eecd371ea302b1c2539048d0 100644
--- a/meson.build
+++ b/meson.build
@@ -12,8 +12,6 @@ add_test_setup('slow', exclude_suites: ['thorough'],
 add_test_setup('thorough',
                env: ['G_TEST_SLOW=1', 'SPEED=thorough', 'RUST_BACKTRACE=1'])
 
-meson.add_postconf_script(find_program('scripts/symlink-install-tree.py'))
-
 ####################
 # Global variables #
 ####################
@@ -76,6 +74,8 @@ have_user = have_linux_user or have_bsd_user
 sh = find_program('sh')
 python = import('python').find_installation()
 
+meson.add_postconf_script([python, 'scripts/symlink-install-tree.py'])
+
 cc = meson.get_compiler('c')
 all_languages = ['c']
 if host_os == 'windows' and add_languages('cpp', required: false, native: false)
@@ -3474,7 +3474,7 @@ foreach target : target_dirs
       output: config_devices_mak,
       depfile: config_devices_mak + '.d',
       capture: true,
-      command: [minikconf,
+      command: [python, minikconf,
                 get_option('default_devices') ? '--defconfig' : '--allnoconfig',
                 config_devices_mak, '@DEPFILE@', '@INPUT@',
                 host_kconfig, target_kconfig])
@@ -3545,8 +3545,8 @@ config_host_h = configure_file(output: 'config-host.h', configuration: config_ho
 genh += config_host_h
 
 hxtool = find_program('scripts/hxtool')
-shaderinclude = find_program('scripts/shaderinclude.py')
-qapi_gen = find_program('scripts/qapi-gen.py')
+shaderinclude = [python, 'scripts/shaderinclude.py']
+qapi_gen = [python, 'scripts/qapi-gen.py']
 qapi_gen_depends = [ meson.current_source_dir() / 'scripts/qapi/__init__.py',
                      meson.current_source_dir() / 'scripts/qapi/commands.py',
                      meson.current_source_dir() / 'scripts/qapi/common.py',
diff --git a/plugins/meson.build b/plugins/meson.build
index 62c991d87fcdd8bcde8edddcc73909c6133f5460..6bf72a69060414ba1b7c1857515eeceb5a2c7b7c 100644
--- a/plugins/meson.build
+++ b/plugins/meson.build
@@ -6,7 +6,7 @@ qemu_plugin_symbols = configure_file(
   input: files('../include/qemu/qemu-plugin.h'),
   output: 'qemu-plugin.symbols',
   capture: true,
-  command: [files('../scripts/qemu-plugin-symbols.py'), '@INPUT@'])
+  command: [python, files('../scripts/qemu-plugin-symbols.py'), '@INPUT@'])
 
 # Modules need more symbols than just those in plugins/qemu-plugins.symbols
 if not enable_modules

---
base-commit: baa79455fa92984ff0f4b9ae94bed66823177a27
change-id: 20250904-python-78ccebd0fded

Best regards,
-- 
Peter Foley <pefoley@google.com>