cmake: Add TARGET_ generator expression support (fixes #9305)

4 files changed, 72 insertions, 11 deletions

diff --git a/mesonbuild/cmake/generator.py b/mesonbuild/cmake/generator.py
index 6525bcb..b68778d 100644
--- a/mesonbuild/cmake/generator.py
+++ b/mesonbuild/cmake/generator.py
@@ -13,12 +13,18 @@
 # limitations under the License.
 
 from .. import mesonlib
+from .common import cmake_is_debug
 import typing as T
 
 if T.TYPE_CHECKING:
-    from .traceparser import CMakeTraceParser
-
-def parse_generator_expressions(raw: str, trace: 'CMakeTraceParser') -> str:
+    from .traceparser import CMakeTraceParser, CMakeTarget
+
+def parse_generator_expressions(
+            raw: str,
+            trace: 'CMakeTraceParser',
+            *,
+            context_tgt: T.Optional['CMakeTarget'] = None,
+        ) -> str:
     '''Parse CMake generator expressions
 
     Most generator expressions are simply ignored for
@@ -47,6 +53,48 @@ def parse_generator_expressions(raw: str, trace: 'CMakeTraceParser') -> str:
         else:
             return '1' if mesonlib.version_compare(arg[:col_pos], '{}{}'.format(op, arg[col_pos + 1:])) else '0'
 
+    def target_property(arg: str) -> str:
+        # We can't really support this since we don't have any context
+        if ',' not in arg:
+            if context_tgt is None:
+                return ''
+            return ';'.join(context_tgt.properties.get(arg, []))
+
+        args = arg.split(',')
+        props = trace.targets[args[0]].properties.get(args[1], []) if args[0] in trace.targets else []
+        return ';'.join(props)
+
+    def target_file(arg: str) -> str:
+        if arg not in trace.targets:
+            return ''
+        tgt = trace.targets[arg]
+
+        cfgs = []
+        cfg = ''
+
+        if 'IMPORTED_CONFIGURATIONS' in tgt.properties:
+            cfgs = [x for x in tgt.properties['IMPORTED_CONFIGURATIONS'] if x]
+            cfg = cfgs[0]
+
+        if cmake_is_debug(trace.env):
+            if 'DEBUG' in cfgs:
+                cfg = 'DEBUG'
+            elif 'RELEASE' in cfgs:
+                cfg = 'RELEASE'
+        else:
+            if 'RELEASE' in cfgs:
+                cfg = 'RELEASE'
+
+        if f'IMPORTED_IMPLIB_{cfg}' in tgt.properties:
+            return ';'.join([x for x in tgt.properties[f'IMPORTED_IMPLIB_{cfg}'] if x])
+        elif 'IMPORTED_IMPLIB' in tgt.properties:
+            return ';'.join([x for x in tgt.properties['IMPORTED_IMPLIB'] if x])
+        elif f'IMPORTED_LOCATION_{cfg}' in tgt.properties:
+            return ';'.join([x for x in tgt.properties[f'IMPORTED_LOCATION_{cfg}'] if x])
+        elif 'IMPORTED_LOCATION' in tgt.properties:
+            return ';'.join([x for x in tgt.properties['IMPORTED_LOCATION'] if x])
+        return ''
+
     supported = {
         # Boolean functions
         'BOOL': lambda x: '0' if x.upper() in ['0', 'FALSE', 'OFF', 'N', 'NO', 'IGNORE', 'NOTFOUND'] or x.endswith('-NOTFOUND') else '1',
@@ -54,6 +102,8 @@ def parse_generator_expressions(raw: str, trace: 'CMakeTraceParser') -> str:
         'OR': lambda x: '1' if any([y == '1' for y in x.split(',')]) else '0',
         'NOT': lambda x: '0' if x == '1' else '1',
 
+        'IF': lambda x: x.split(',')[1] if x.split(',')[0] == '1' else x.split(',')[2],
+
         '0': lambda x: '',
         '1': lambda x: x,
 
@@ -81,6 +131,12 @@ def parse_generator_expressions(raw: str, trace: 'CMakeTraceParser') -> str:
         'ANGLE-R': lambda x: '>',
         'COMMA': lambda x: ',',
         'SEMICOLON': lambda x: ';',
+
+        # Target related expressions
+        'TARGET_EXISTS': lambda x: '1' if x in trace.targets else '0',
+        'TARGET_NAME_IF_EXISTS': lambda x: x if x in trace.targets else '',
+        'TARGET_PROPERTY': target_property,
+        'TARGET_FILE': target_file,
     }  # type: T.Dict[str, T.Callable[[str], str]]
 
     # Recursively evaluate generator expressions
diff --git a/mesonbuild/cmake/interpreter.py b/mesonbuild/cmake/interpreter.py
index 0b6d241..9582266 100644
--- a/mesonbuild/cmake/interpreter.py
+++ b/mesonbuild/cmake/interpreter.py
@@ -793,7 +793,7 @@ class CMakeInterpreter:
         self.languages         = []  # type: T.List[str]
         self.targets           = []  # type: T.List[ConverterTarget]
         self.custom_targets    = []  # type: T.List[ConverterCustomTarget]
-        self.trace             = CMakeTraceParser('', Path('.'))  # Will be replaced in analyse
+        self.trace             = CMakeTraceParser('', Path('.'), self.env)  # Will be replaced in analyse
         self.output_target_map = OutputTargetMap(self.build_dir)
 
         # Generated meson data
@@ -814,7 +814,7 @@ class CMakeInterpreter:
         cmake_exe = CMakeExecutor(self.env, '>=3.7', MachineChoice.BUILD)
         if not cmake_exe.found():
             raise CMakeException('Unable to find CMake')
-        self.trace = CMakeTraceParser(cmake_exe.version(), self.build_dir, permissive=True)
+        self.trace = CMakeTraceParser(cmake_exe.version(), self.build_dir, self.env, permissive=True)
 
         preload_file = DataFile('cmake/data/preload.cmake').write_to_private(self.env)
         toolchain = CMakeToolchain(cmake_exe, self.env, self.for_machine, CMakeExecScope.SUBPROJECT, self.build_dir, preload_file)
diff --git a/mesonbuild/cmake/toolchain.py b/mesonbuild/cmake/toolchain.py
index 316f57c..e30f642 100644
--- a/mesonbuild/cmake/toolchain.py
+++ b/mesonbuild/cmake/toolchain.py
@@ -232,7 +232,7 @@ class CMakeToolchain:
         temp_toolchain_file.write_text(CMakeToolchain._print_vars(self.variables), encoding='utf-8')
 
         # Configure
-        trace = CMakeTraceParser(self.cmakebin.version(), build_dir)
+        trace = CMakeTraceParser(self.cmakebin.version(), build_dir, self.env)
         self.cmakebin.set_exec_mode(print_cmout=False, always_capture_stderr=trace.requires_stderr())
         cmake_args = []
         cmake_args += trace.trace_args()
diff --git a/mesonbuild/cmake/traceparser.py b/mesonbuild/cmake/traceparser.py
index fd7e115..7220568 100644
--- a/mesonbuild/cmake/traceparser.py
+++ b/mesonbuild/cmake/traceparser.py
@@ -27,6 +27,9 @@ import re
 import json
 import textwrap
 
+if T.TYPE_CHECKING:
+    from ..environment import Environment
+
 class CMakeTraceLine:
     def __init__(self, file_str: str, line: int, func: str, args: T.List[str]) -> None:
         self.file = CMakeTraceLine._to_path(file_str)
@@ -90,7 +93,7 @@ class CMakeGeneratorTarget(CMakeTarget):
         self.working_dir = None  # type: T.Optional[Path]
 
 class CMakeTraceParser:
-    def __init__(self, cmake_version: str, build_dir: Path, permissive: bool = True) -> None:
+    def __init__(self, cmake_version: str, build_dir: Path, env: 'Environment', permissive: bool = True) -> None:
         self.vars:                      T.Dict[str, T.List[str]]     = {}
         self.vars_by_file: T.Dict[Path, T.Dict[str, T.List[str]]]    = {}
         self.targets:                   T.Dict[str, CMakeTarget]     = {}
@@ -101,6 +104,7 @@ class CMakeTraceParser:
         # T.List of targes that were added with add_custom_command to generate files
         self.custom_targets = []  # type: T.List[CMakeGeneratorTarget]
 
+        self.env = env
         self.permissive = permissive  # type: bool
         self.cmake_version = cmake_version  # type: str
         self.trace_file = 'cmake_trace.txt'
@@ -202,12 +206,13 @@ class CMakeTraceParser:
         }
 
         for tgt in self.targets.values():
-            tgt.name = parse_generator_expressions(tgt.name, self)
-            tgt.type = parse_generator_expressions(tgt.type, self)
+            tgtlist_gen: T.Callable[[T.List[str], CMakeTarget],  T.List[str]] = lambda strlist, t: [parse_generator_expressions(x, self, context_tgt=t) for x in strlist]
+            tgt.name = parse_generator_expressions(tgt.name, self, context_tgt=tgt)
+            tgt.type = parse_generator_expressions(tgt.type, self, context_tgt=tgt)
             tgt.properties = {
-                k: strlist_gen(v) for k, v in tgt.properties.items()
+                k: tgtlist_gen(v, tgt) for k, v in tgt.properties.items()
             } if tgt.properties is not None else None
-            tgt.depends = strlist_gen(tgt.depends)
+            tgt.depends = tgtlist_gen(tgt.depends, tgt)
 
         for ctgt in self.custom_targets:
             ctgt.outputs = pathlist_gen(ctgt.outputs)