Add support for Files passed to generators.

I need this for windows.compile_resources to be able to use
configure_file results, but it may have other benefits.

mesonbuild/backend/ninjabackend.py

@@ -1557,7 +1557,7 @@ rule FORTRAN_DEP_HACK
             else:
                 sole_output = ''
             curfile = infilelist[i]
-            infilename = os.path.join(self.build_to_src, curfile)
+            infilename = curfile.rel_to_builddir(self.build_to_src)
             outfiles = genlist.get_outputs_for(curfile)
             outfiles = [os.path.join(self.get_target_private_dir(target), of) for of in outfiles]
             if generator.depfile is None:

mesonbuild/backend/vs2010backend.py

@@ -121,7 +121,7 @@ class Vs2010Backend(backends.Backend):
                     else:
                         sole_output = ''
                     curfile = infilelist[i]
-                    infilename = os.path.join(self.environment.get_source_dir(), curfile)
+                    infilename = os.path.join(down, curfile.rel_to_builddir(self.build_to_src))
                     outfiles_rel = genlist.get_outputs_for(curfile)
                     outfiles = [os.path.join(target_private_dir, of) for of in outfiles_rel]
                     generator_output_files += outfiles

mesonbuild/build.py

@@ -918,9 +918,11 @@ class Generator():
     def process_files(self, name, files, state, extra_args=[]):
         output = GeneratedList(self, extra_args=extra_args)
         for f in files:
-            if not isinstance(f, str):
-                raise InvalidArguments('{} arguments must be strings.'.format(name))
-            output.add_file(os.path.join(state.subdir, f))
+            if isinstance(f, str):
+                f = File.from_source_file(state.environment.source_dir, state.subdir, f)
+            elif not isinstance(f, File):
+                raise InvalidArguments('{} arguments must be strings or files not {!r}.'.format(name, f))
+            output.add_file(f)
         return output
 
 
@@ -938,7 +940,7 @@ class GeneratedList():
 
     def add_file(self, newfile):
         self.infilelist.append(newfile)
-        outfiles = self.generator.get_base_outnames(newfile)
+        outfiles = self.generator.get_base_outnames(newfile.fname)
         self.outfilelist += outfiles
         self.outmap[newfile] = outfiles
 

test cases/common/133 configure file in generator/inc/confdata.in

@@ -0,0 +1 @@
+@VALUE@

test cases/common/133 configure file in generator/inc/meson.build

@@ -0,0 +1,6 @@
+cdata = configuration_data()
+cdata.set('VALUE', '42')
+
+cfile = configure_file(input : 'confdata.in',
+output : 'confdata',
+configuration : cdata)

test cases/common/133 configure file in generator/meson.build

@@ -0,0 +1,4 @@
+project('conf file in generator', 'c')
+
+subdir('inc')
+subdir('src')

test cases/common/133 configure file in generator/src/gen.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+
+import sys
+
+ifile = sys.argv[1]
+ofile = sys.argv[2]
+
+with open(ifile, 'r') as f:
+    resval = f.readline().strip()
+
+templ = '#define RESULT (%s)\n'
+with open(ofile, 'w') as f:
+    f.write(templ % (resval, ))

test cases/common/133 configure file in generator/src/main.c

@@ -0,0 +1,17 @@
+#include<stdio.h>
+
+#include"confdata.h"
+#if RESULT != 42
+#error Configuration RESULT is not defined correctly
+#endif
+
+#undef RESULT
+
+#include"source.h"
+#if RESULT != 23
+#error Source RESULT is not defined correctly
+#endif
+
+int main(int argc, char **argv) {
+    return 0;
+}

test cases/common/133 configure file in generator/src/meson.build

@@ -0,0 +1,7 @@
+compiler = find_program('gen.py')
+gen = generator(compiler,
+  output: '@BASENAME@.h',
+  arguments : ['@INPUT@', '@OUTPUT@'])
+hs = gen.process(cfile, files('source'))
+
+executable('proggie', 'main.c', hs)

test cases/common/133 configure file in generator/src/source

@@ -0,0 +1 @@
+23