Fix introspection and make it possible to have top level targets with the same name in subprojects. Fixes #222.

build.py

@@ -139,9 +139,10 @@ class ExtractedObjects():
         self.srclist = srclist
 
 class BuildTarget():
-    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
+    def __init__(self, name, subdir, subproject, is_cross, sources, objects, environment, kwargs):
         self.name = name
         self.subdir = subdir
+        self.subproject = subproject # Can not be calculated from subdir as subproject dirname can be changed per project.
         self.is_cross = is_cross
         self.sources = []
         self.objects = []
@@ -165,6 +166,9 @@ class BuildTarget():
             raise InvalidArguments('Build target %s has no sources.' % name)
         self.validate_sources()
 
+    def get_id(self):
+        return self.subproject + ':' + self.name + self.type_suffix()
+
     def check_unknown_kwargs(self, kwargs):
         # Override this method in derived classes that have more
         # keywords.
@@ -578,8 +582,8 @@ class GeneratedList():
         return self.generator
 
 class Executable(BuildTarget):
-    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
-        super().__init__(name, subdir, is_cross, sources, objects, environment, kwargs)
+    def __init__(self, name, subdir, subproject, is_cross, sources, objects, environment, kwargs):
+        super().__init__(name, subdir, subproject, is_cross, sources, objects, environment, kwargs)
         self.prefix = ''
         self.suffix = environment.get_exe_suffix()
         suffix = environment.get_exe_suffix()
@@ -594,8 +598,8 @@ class Executable(BuildTarget):
         return "@exe"
 
 class StaticLibrary(BuildTarget):
-    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
-        super().__init__(name, subdir, is_cross, sources, objects, environment, kwargs)
+    def __init__(self, name, subdir, subproject, is_cross, sources, objects, environment, kwargs):
+        super().__init__(name, subdir, subproject, is_cross, sources, objects, environment, kwargs)
         if len(self.sources) > 0 and self.sources[0].endswith('.cs'):
             raise InvalidArguments('Static libraries not supported for C#.')
         self.prefix = environment.get_static_lib_prefix()
@@ -612,10 +616,10 @@ class StaticLibrary(BuildTarget):
         return "@sta"
 
 class SharedLibrary(BuildTarget):
-    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
+    def __init__(self, name, subdir, subproject, is_cross, sources, objects, environment, kwargs):
         self.version = None
         self.soversion = None
-        super().__init__(name, subdir, is_cross, sources, objects, environment, kwargs);
+        super().__init__(name, subdir, subproject, is_cross, sources, objects, environment, kwargs);
         if len(self.sources) > 0 and self.sources[0].endswith('.cs'):
             self.suffix = 'dll'
             self.prefix = 'lib'
@@ -704,6 +708,9 @@ class CustomTarget:
             mlog.log(mlog.bold('Warning:'), 'Unknown keyword arguments in target %s: %s' %
                      (self.name, ', '.join(unknowns)))
 
+    def get_id(self):
+        return self.name + self.type_suffix()
+
     def process_kwargs(self, kwargs):
         self.sources = kwargs.get('input', [])
         if not isinstance(self.sources, list):
@@ -811,6 +818,9 @@ class RunTarget:
         self.args = args
         self.subdir = subdir
 
+    def get_id(self):
+        return self.name + self.type_suffix()
+
     def get_basename(self):
         return self.name
 
@@ -836,8 +846,8 @@ class RunTarget:
         return "@run"
 
 class Jar(BuildTarget):
-    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
-        super().__init__(name, subdir, is_cross, sources, objects, environment, kwargs);
+    def __init__(self, name, subdir, subproject, is_cross, sources, objects, environment, kwargs):
+        super().__init__(name, subdir, subproject, is_cross, sources, objects, environment, kwargs);
         for s in self.sources:
             if not s.endswith('.java'):
                 raise InvalidArguments('Jar source %s is not a java file.' % s)

interpreter.py

@@ -1663,7 +1663,7 @@ class Interpreter():
                                    % name)
         # To permit an executable and a shared library to have the
         # same name, such as "foo.exe" and "libfoo.a".
-        idname = name + tobj.type_suffix()
+        idname = tobj.get_id()
         if idname in self.build.targets:
             raise InvalidCode('Tried to create target "%s", but a target of that name already exists.' % name)
         self.build.targets[idname] = tobj
@@ -1704,7 +1704,7 @@ class Interpreter():
         else:
             mlog.debug('Unknown target type:', str(targetholder))
             raise RuntimeError('Unreachable code')
-        target = targetclass(name, self.subdir, is_cross, sources, objs, self.environment, kwargs)
+        target = targetclass(name, self.subdir, self.subproject, is_cross, sources, objs, self.environment, kwargs)
         l = targetholder(target)
         self.add_target(name, l.held_object)
         self.global_args_frozen = True

mesonintrospect.py

@@ -41,9 +41,10 @@ parser.add_argument('args', nargs='+')
 
 def list_targets(coredata, builddata):
     tlist = []
-    for target in builddata.get_targets().values():
+    for (idname, target) in builddata.get_targets().items():
         t = {}
         t['name'] = target.get_basename()
+        t['id'] = idname
         fname = target.get_filename()
         if isinstance(fname, list):
             fname = [os.path.join(target.subdir, x) for x in fname]
@@ -78,7 +79,7 @@ def list_target_files(target_name, coredata, builddata):
     except KeyError:
         print("Unknown target %s." % target_name)
         sys.exit(1)
-    sources = [os.path.join(subdir, i) for i in sources]
+    sources = [os.path.join(i.subdir, i.fname) for i in sources]
     print(json.dumps(sources))
 
 def list_buildoptions(coredata, builddata):

ninjabackend.py

@@ -162,7 +162,7 @@ class NinjaBackend(backends.Backend):
             self.generate_custom_target(target, outfile)
         if isinstance(target, build.RunTarget):
             self.generate_run_target(target, outfile)
-        name = target.get_basename() + target.type_suffix()
+        name = target.get_id()
         gen_src_deps = []
         if name in self.processed_targets:
             return

test cases/common/90 identical target name in subproject/bar.c

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

test cases/common/90 identical target name in subproject/meson.build

@@ -0,0 +1,5 @@
+project('toplevel bar', 'c')
+
+subproject('foo')
+
+executable('bar', 'bar.c')

test cases/common/90 identical target name in subproject/subprojects/foo/bar.c

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

test cases/common/90 identical target name in subproject/subprojects/foo/meson.build

@@ -0,0 +1,3 @@
+project('subfoo', 'c')
+
+executable('bar', 'bar.c')