vulkan: Track dependencies of Python imports

The meson.build was unaware of transitive dependencies introduced by
Python imports.

Android still needs fixing. But I did not update the Android files lest
I break the build.

Ideally, we would fix this by using a Python runner that generates
a depfile, similar to how meson creates depfiles for C files by passing
flags -MD -MQ -MF to gcc. But this patch gets the job done, without
stalling on the ideal general solution, by manually tracking the Python
imports in new 'foo_depend_files' variables.

CC: mesa-stable@lists.freedesktop.org
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/1466>

src/amd/vulkan/meson.build

@@ -27,6 +27,7 @@ radv_entrypoints = custom_target(
     '--out-h', '@OUTPUT0@', '--out-c', '@OUTPUT1@', '--prefix', 'radv',
     '--device-prefix', 'sqtt',
   ],
+  depend_files : vk_entrypoints_gen_depend_files,
 )
 
 libradv_files = files(

src/broadcom/vulkan/meson.build

@@ -26,6 +26,7 @@ v3dv_entrypoints = custom_target(
     prog_python, '@INPUT0@', '--xml', '@INPUT1@', '--proto', '--weak',
     '--out-h', '@OUTPUT0@', '--out-c', '@OUTPUT1@', '--prefix', 'v3dv',
   ],
+  depend_files : vk_entrypoints_gen_depend_files,
 )
 
 v3dv_extensions_c = custom_target(

src/freedreno/vulkan/meson.build

@@ -26,6 +26,7 @@ tu_entrypoints = custom_target(
     prog_python, '@INPUT0@', '--xml', '@INPUT1@', '--proto', '--weak',
     '--out-h', '@OUTPUT0@', '--out-c', '@OUTPUT1@', '--prefix', 'tu',
   ],
+  depend_files : vk_entrypoints_gen_depend_files,
 )
 
 tu_extensions_c = custom_target(

src/gallium/frontends/lavapipe/meson.build

@@ -7,6 +7,7 @@ lvp_entrypoints = custom_target(
     prog_python, '@INPUT0@', '--xml', '@INPUT1@', '--proto', '--weak',
     '--out-h', '@OUTPUT0@', '--out-c', '@OUTPUT1@', '--prefix', 'lvp',
   ],
+  depend_files : vk_entrypoints_gen_depend_files,
 )
 
 liblvp_files = files(

src/intel/vulkan/meson.build

@@ -30,6 +30,7 @@ anv_entrypoints = custom_target(
     '--device-prefix', 'gfx11', '--device-prefix', 'gfx12',
     '--device-prefix', 'gfx125',
   ],
+  depend_files : vk_entrypoints_gen_depend_files,
 )
 
 intel_icd = custom_target(

src/vulkan/util/meson.build

@@ -18,6 +18,23 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+# Mesa-local imports in the Python files must be declared here for correct
+# dependency tracking.
+vk_extensions_depend_files = [
+]
+vk_extensions_gen_depend_files = [
+  files('vk_extensions.py'),
+  vk_extensions_depend_files,
+]
+vk_dispatch_table_gen_depend_files = [
+  files('vk_extensions.py'),
+  vk_extensions_depend_files,
+]
+vk_entrypoints_gen_depend_files = [
+  files('vk_dispatch_table_gen.py'),
+  vk_dispatch_table_gen_depend_files,
+]
+
 vk_entrypoints_gen = files('vk_entrypoints_gen.py')
 vk_extensions_gen = files('vk_extensions_gen.py')
 vk_icd_gen = files('vk_icd_gen.py')
@@ -55,6 +72,7 @@ vk_common_entrypoints = custom_target(
     prog_python, '@INPUT0@', '--xml', '@INPUT1@', '--proto', '--weak',
     '--out-h', '@OUTPUT0@', '--out-c', '@OUTPUT1@', '--prefix', 'vk_common',
   ],
+  depend_files : vk_entrypoints_gen_depend_files,
 )
 
 vk_dispatch_table = custom_target(
@@ -65,6 +83,7 @@ vk_dispatch_table = custom_target(
     prog_python, '@INPUT0@', '--xml', '@INPUT1@',
     '--out-c', '@OUTPUT0@', '--out-h', '@OUTPUT1@'
   ],
+  depend_files : vk_dispatch_table_gen_depend_files,
 )
 
 vk_enum_to_str = custom_target(
@@ -85,7 +104,7 @@ vk_extensions = custom_target(
     prog_python, '@INPUT0@', '--xml', '@INPUT1@',
     '--out-c', '@OUTPUT0@', '--out-h', '@OUTPUT1@'
   ],
-  depend_files : files('vk_extensions.py'),
+  depend_files : vk_extensions_gen_depend_files,
 )
 
 libvulkan_util = static_library(

src/vulkan/util/vk_dispatch_table_gen.py

@@ -33,6 +33,8 @@ import xml.etree.ElementTree as et
 from collections import OrderedDict, namedtuple
 from mako.template import Template
 
+# Mesa-local imports must be declared in meson variable
+# '{file_without_suffix}_depend_files'.
 from vk_extensions import *
 
 # We generate a static hash table for entry point lookup

src/vulkan/util/vk_entrypoints_gen.py

@@ -28,6 +28,8 @@ import os
 
 from mako.template import Template
 
+# Mesa-local imports must be declared in meson variable
+# '{file_without_suffix}_depend_files'.
 from vk_dispatch_table_gen import get_entrypoints_from_xml
 
 TEMPLATE_H = Template(COPYRIGHT + """\

src/vulkan/util/vk_extensions_gen.py

@@ -28,6 +28,8 @@ import xml.etree.ElementTree as et
 
 from mako.template import Template
 
+# Mesa-local imports must be declared in meson variable
+# '{file_without_suffix}_depend_files'.
 from vk_extensions import *
 
 _TEMPLATE_H = Template(COPYRIGHT + """