Adjust all the other places MesonException file attribute is set

A MesonException has file, lineno and colno attributes, which get
formatted as a location in mlog.exception().

The file attribute got changed from a path relative to the root source
directory to a pathname (absolute or relative to cwd) in one place in
commit b8fbbf59.  Adjust all the other places the file attribute is set
to match.

Also:
Setting MesonException.file seems to be missing in the case where Parser
returned a non-CodeBlockNode object.  Fortunately, that looks like it's
unreachable, but add it just in case.

mesonbuild/ast/interpreter.py

@@ -156,7 +156,7 @@ class AstInterpreter(interpreterbase.InterpreterBase):
         try:
             codeblock = mparser.Parser(code, subdir).parse()
         except mesonlib.MesonException as me:
-            me.file = buildfilename
+            me.file = absname
             raise me
 
         self.subdir = subdir

mesonbuild/interpreter.py

@@ -3750,7 +3750,7 @@ This will become a hard error in the future.''' % kwargs['input'], location=self
         try:
             codeblock = mparser.Parser(code, self.subdir).parse()
         except mesonlib.MesonException as me:
-            me.file = buildfilename
+            me.file = absname
             raise me
         try:
             self.evaluate_codeblock(codeblock)

mesonbuild/interpreterbase.py

@@ -432,7 +432,7 @@ class InterpreterBase:
                 if not hasattr(e, 'lineno'):
                     e.lineno = cur.lineno
                     e.colno = cur.colno
-                    e.file = os.path.join(self.subdir, 'meson.build')
+                    e.file = os.path.join(self.source_root, self.subdir, environment.build_filename)
                 raise e
             i += 1 # In THE FUTURE jump over blocks and stuff.
 

mesonbuild/optinterpreter.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os, re
+import re
 import functools
 import typing as T
 
@@ -147,6 +147,7 @@ class OptionInterpreter:
         if not isinstance(ast, mparser.CodeBlockNode):
             e = OptionException('Option file is malformed.')
             e.lineno = ast.lineno()
+            e.file = option_file
             raise e
         for cur in ast.lines:
             try:
@@ -154,7 +155,7 @@ class OptionInterpreter:
             except Exception as e:
                 e.lineno = cur.lineno
                 e.colno = cur.colno
-                e.file = os.path.join('meson_options.txt')
+                e.file = option_file
                 raise e
 
     def reduce_single(self, arg):