Run_target can run binaries obtained with find_program.

mesonbuild/backend/ninjabackend.py

@@ -425,6 +425,8 @@ int dummy;
                 if exe_wrap is not None:
                     cmd += [exe_wrap]
             cmd.append(abs_exe)
+        elif isinstance(texe, dependencies.ExternalProgram):
+            cmd += texe.get_command()
         else:
             cmd.append(target.command)
         cmd += arg_strings

mesonbuild/interpreter.py

@@ -1768,7 +1768,7 @@ class Interpreter():
                 i = i.held_object
             except AttributeError:
                 pass
-            if not isinstance(i, (str, build.BuildTarget, build.CustomTarget)):
+            if not isinstance(i, (str, build.BuildTarget, build.CustomTarget, dependencies.ExternalProgram)):
                 mlog.debug('Wrong type:', str(i))
                 raise InterpreterException('Invalid argument to run_target.')
             cleaned_args.append(i)

test cases/common/58 run target/meson.build

@@ -7,3 +7,6 @@ run_target('mycommand', 'scripts/script.sh')
 
 exe = executable('helloprinter', 'helloprinter.c')
 run_target('runhello', exe, 'argument')
+
+python3 = find_program('python3')
+run_target('py3hi', python3, '-c', 'print("I am Python3.")')