Add test for build_on_all.

mesonbuild/backend/ninjabackend.py

@@ -2163,13 +2163,10 @@ rule FORTRAN_DEP_HACK
     def get_build_on_all_targets(self):
         result = []
         for t in self.build.get_targets().values():
-            if t.build_on_all:
+            if t.build_on_all or \
+                (hasattr(t, 'install') and t.install) or\
+                (hasattr(t, 'build_always') and t.build_always):
                 result.append(t)
-            # CustomTargets that aren't installed should only be built if
-            # they are used by something else or are to always be built
-            if isinstance(t, build.CustomTarget):
-                if t.install or t.build_always:
-                    result.append(t)
         return result
 
     def generate_ending(self, outfile):

mesonbuild/build.py

@@ -44,6 +44,7 @@ known_basic_kwargs = {'install': True,
                       'sources': True,
                       'objects': True,
                       'native': True,
+                      'build_on_all': True,
                       }
 
 # These contain kwargs supported by both static and shared libraries. These are
@@ -264,6 +265,11 @@ class Target:
     def get_subdir(self):
         return self.subdir
 
+    def process_kwargs(self, kwargs):
+        if 'build_on_all' in kwargs:
+            self.build_on_all = kwargs['build_on_all']
+            if not isinstance(self.build_on_all, bool):
+                raise InvalidArguments('build_on_all must be a boolean value.')
 
 class BuildTarget(Target):
     def __init__(self, name, subdir, subproject, is_cross, sources, objects, environment, kwargs):
@@ -518,6 +524,7 @@ class BuildTarget(Target):
         return self.custom_install_dir
 
     def process_kwargs(self, kwargs, environment):
+        super().process_kwargs(kwargs)
         self.copy_kwargs(kwargs)
         kwargs.get('modules', [])
         self.need_install = kwargs.get('install', self.need_install)
@@ -1281,6 +1288,7 @@ class CustomTarget(Target):
         return deps
 
     def process_kwargs(self, kwargs):
+        super().process_kwargs(kwargs)
         self.sources = kwargs.get('input', [])
         if not isinstance(self.sources, list):
             self.sources = [self.sources]

run_unittests.py

@@ -526,6 +526,17 @@ class LinuxlikeTests(unittest.TestCase):
         self._test_stds_impl(testdir, cpp, 'cpp')
 
 
+    def test_build_on_all(self):
+        testdir = os.path.join(self.unit_test_dir, '4 build on all')
+        self.init(testdir)
+        self.build()
+        genfile = os.path.join(self.builddir, 'generated.dat')
+        exe = os.path.join(self.builddir, 'fooprog')
+        self.assertTrue(os.path.exists(genfile))
+        self.assertFalse(os.path.exists(exe))
+        self._run(self.ninja_command + ['fooprog'])
+        self.assertTrue(os.path.exists(exe))
+
 class RewriterTests(unittest.TestCase):
 
     def setUp(self):

test cases/unit/4 build on all/foo.c

@@ -0,0 +1,6 @@
+#include<stdio.h>
+
+int main(int argc, char **argv) {
+    printf("Existentialism.\n");
+    return 0;
+}

test cases/unit/4 build on all/meson.build

@@ -0,0 +1,13 @@
+project('build on all', 'c')
+
+py3_mod = import('python3')
+py3 = py3_mod.find_python()
+
+executable('fooprog', 'foo.c', build_on_all : false)
+comp = files('mygen.py')
+mytarget = custom_target('gendat',
+  output : 'generated.dat',
+  input : 'source.txt',
+  command : [py3] + comp + ['@INPUT@', '@OUTPUT@'],
+  build_on_all : true,
+)

test cases/unit/4 build on all/mygen.py

@@ -0,0 +1,8 @@
+#!/usr/bin/env python3
+
+import sys
+
+ifile = open(sys.argv[1])
+ofile = open(sys.argv[2], 'w')
+
+ofile.write(ifile.read())

test cases/unit/4 build on all/source.txt

@@ -0,0 +1 @@
+I am a bunch of text.