Compiler: Add early error for output path being a directory.

- Introduce new `Path` type and an array of build paths on the build context.
- Resolve input and output paths/files early (before parsing).
- Error early if inputs are missing or outputs are directories.
- Plumb new file path generation into linker stage instead of its adhoc method.

TODO:
- Remove more adhoc file path generation in parser and linker stage.
- Make intermediate object file generation use new path system.
- Round out and robustify Path helper functions.

tests/core/build.bat

@@ -5,61 +5,61 @@ python3 download_assets.py
 echo ---
 echo Running core:image tests
 echo ---
-%PATH_TO_ODIN% run image    %COMMON%
+%PATH_TO_ODIN% run image    %COMMON% -out:test_image
 
 echo ---
 echo Running core:compress tests
 echo ---
-%PATH_TO_ODIN% run compress %COMMON%
+%PATH_TO_ODIN% run compress %COMMON% -out:test_compress
 
 echo ---
 echo Running core:strings tests
 echo ---
-%PATH_TO_ODIN% run strings %COMMON%
+%PATH_TO_ODIN% run strings %COMMON% -out:test_strings
 
 echo ---
 echo Running core:hash tests
 echo ---
-%PATH_TO_ODIN% run hash %COMMON% -o:size
+%PATH_TO_ODIN% run hash %COMMON% -o:size -out:test_hash
 
 echo ---
 echo Running core:odin tests
 echo ---
-%PATH_TO_ODIN% run odin %COMMON% -o:size
+%PATH_TO_ODIN% run odin %COMMON% -o:size -out:test_odin
 
 echo ---
 echo Running core:crypto hash tests
 echo ---
-%PATH_TO_ODIN% run crypto %COMMON%
+%PATH_TO_ODIN% run crypto %COMMON% -out:test_crypto
 
 echo ---
 echo Running core:encoding tests
 echo ---
-%PATH_TO_ODIN% run encoding/hxa %COMMON%
-%PATH_TO_ODIN% run encoding/json %COMMON%
-%PATH_TO_ODIN% run encoding/varint %COMMON%
+%PATH_TO_ODIN% run encoding/hxa    %COMMON% -out:test_hxa
+%PATH_TO_ODIN% run encoding/json   %COMMON% -out:test_json
+%PATH_TO_ODIN% run encoding/varint %COMMON% -out:test_varint
 
 echo ---
 echo Running core:math/noise tests
 echo ---
-%PATH_TO_ODIN% run math/noise %COMMON%
+%PATH_TO_ODIN% run math/noise      %COMMON% -out:test_noise
 
 echo ---
 echo Running core:math tests
 echo ---
-%PATH_TO_ODIN% run math %COMMON%
+%PATH_TO_ODIN% run math %COMMON% -out:test_math
 
 echo ---
 echo Running core:math/linalg/glsl tests
 echo ---
-%PATH_TO_ODIN% run math/linalg/glsl %COMMON%
+%PATH_TO_ODIN% run math/linalg/glsl %COMMON% -out:test_glsl
 
 echo ---
 echo Running core:path/filepath tests
 echo ---
-%PATH_TO_ODIN% run path/filepath %COMMON%
+%PATH_TO_ODIN% run path/filepath %COMMON% -out:test_filepath
 
 echo ---
 echo Running core:reflect tests
 echo ---
-%PATH_TO_ODIN% run reflect %COMMON%
+%PATH_TO_ODIN% run reflect %COMMON% -out:test_reflect

tests/core/math/big/build.bat

@@ -4,7 +4,7 @@ set PATH_TO_ODIN==..\..\..\..\odin
 set TEST_ARGS=-fast-tests
 set TEST_ARGS=-no-random
 set TEST_ARGS=
-set OUT_NAME=math_big_test_library
+set OUT_NAME=math_big_test_library.dll
 set COMMON=-build-mode:shared -show-timings -no-bounds-check -define:MATH_BIG_EXE=false -vet -strict-style
 echo ---
 echo Running core:math/big tests

tests/issues/run.sh

@@ -8,10 +8,10 @@ COMMON="-collection:tests=tests -out:tests/issues/build/test_issue"
 set -x
 
 ./odin build tests/issues/test_issue_829.odin $COMMON -file
-tests/issues/build/test_issue
+tests/issues/build/test_issue.bin
 
 ./odin build tests/issues/test_issue_1592.odin $COMMON -file
-tests/issues/build/test_issue
+tests/issues/build/test_issue.bin
 
 set +x