Special case meson.version().version_compare() statement

when that statement gets evaluated, the interpreter remembers the
version target and if it was part of the evaluation of a `if` condition
then the target meson version is temporally overriden within that
if-block.

Fixes: #7590

1 files changed, 17 insertions, 0 deletions

diff --git a/test cases/unit/82 meson version compare/meson.build b/test cases/unit/82 meson version compare/meson.build
new file mode 100644
index 0000000..ed69a8b
--- /dev/null
+++ b/test cases/unit/82 meson version compare/meson.build
@@ -0,0 +1,17 @@
+project('version compare', meson_version: '>= 0.1')
+
+if meson.version().version_compare('>= 9999')
+  error('This should not be executed')
+elif meson.version().version_compare('>= 0.55') and false
+  error('This should not be executed')
+elif not meson.version().version_compare('>= 0.55')
+  error('This should not be executed')
+elif meson.version().version_compare('>= 0.55')
+  # This Should not produce warning even when using function not available in
+  # meson 0.1.
+  foo_dep = declare_dependency()
+  meson.override_dependency('foo', foo_dep)
+endif
+
+# This will error out if elif cause did not enter
+assert(foo_dep.found(), 'meson.version_compare did not work')