Deprecate `build_always`, add `build_always_stale`

Since `build_always` also adds a target to the set of default targets,
this option is marked deprecated in favour of the new option
`build_always_stale`.

`build_always_stale` *only* marks the target to be always considered out
of date, but does *not* add it to the set of default targets.

The old behaviour can still be achieved by combining
`build_always_stale` with `build_by_default`.

fixes #1942

2 files changed, 2 insertions, 2 deletions

diff --git a/mesonbuild/backend/backends.py b/mesonbuild/backend/backends.py
index e423473..7eccca4 100644
--- a/mesonbuild/backend/backends.py
+++ b/mesonbuild/backend/backends.py
@@ -750,7 +750,7 @@ class Backend:
         result = OrderedDict()
         # Get all build and custom targets that must be built by default
         for name, t in self.build.get_targets().items():
-            if t.build_by_default or t.install or t.build_always:
+            if t.build_by_default or t.install:
                 result[name] = t
         # Get all targets used as test executables and arguments. These must
         # also be built by default. XXX: Sometime in the future these should be
diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
index 48f5fc2..9d72225 100644
--- a/mesonbuild/backend/ninjabackend.py
+++ b/mesonbuild/backend/ninjabackend.py
@@ -504,7 +504,7 @@ int dummy;
         deps = self.unwrap_dep_list(target)
         deps += self.get_custom_target_depend_files(target)
         desc = 'Generating {0} with a {1} command.'
-        if target.build_always:
+        if target.build_always_stale:
             deps.append('PHONY')
         if target.depfile is None:
             rulename = 'CUSTOM_COMMAND'