test: make mock git list untracked files

tests/test_build.py

@@ -12,21 +12,36 @@
 
 LIST_FILES_TEMPLATE = """\
 #!{python}
-import sys
+import sys, posixpath
 tracked = {tracked}
-if '--deleted' not in sys.argv:
-    for filename in tracked:
-        print(filename, end="\\0")
+untracked_deleted = {untracked_deleted}
+
+if '--deleted' in sys.argv:
+    files = untracked_deleted
+else:
+    files = tracked
+
+for filename in map(posixpath.normpath, files):
+    print(filename, end="\\0")
 """
 
 MODULE1_TOML_FILES = ["EG_README.rst", "module1.py", "pyproject.toml"]
 
+def make_git_script(
+    tracked = MODULE1_TOML_FILES,
+    untracked_deleted = ["dist/module1-0.1.tar.gz"]
+):
+    return LIST_FILES_TEMPLATE.format(
+        python=sys.executable,
+        tracked=tracked,
+        untracked_deleted=untracked_deleted,
+    )
+
 def test_build_main(copy_sample):
     td = copy_sample('module1_toml')
     (td / '.git').mkdir()   # Fake a git repo
 
-    with MockCommand('git', LIST_FILES_TEMPLATE.format(
-            python=sys.executable, tracked=MODULE1_TOML_FILES)):
+    with MockCommand('git', make_git_script()):
         res = build.main(td / 'pyproject.toml')
     assert res.wheel.file.suffix == '.whl'
     assert res.sdist.file.name.endswith('.tar.gz')
@@ -37,8 +52,7 @@ def test_build_sdist_only(copy_sample):
     td = copy_sample('module1_toml')
     (td / '.git').mkdir()  # Fake a git repo
 
-    with MockCommand('git', LIST_FILES_TEMPLATE.format(
-            python=sys.executable, tracked=MODULE1_TOML_FILES)):
+    with MockCommand('git', make_git_script()):
         res = build.main(td / 'pyproject.toml', formats={'sdist'})
     assert res.wheel is None
 
@@ -49,8 +63,7 @@ def test_build_wheel_only(copy_sample):
     td = copy_sample('module1_toml')
     (td / '.git').mkdir()  # Fake a git repo
 
-    with MockCommand('git', LIST_FILES_TEMPLATE.format(
-            python=sys.executable, tracked=MODULE1_TOML_FILES)):
+    with MockCommand('git', make_git_script()):
         res = build.main(td / 'pyproject.toml', formats={'wheel'})
     assert res.sdist is None
 
@@ -83,9 +96,19 @@ def test_build_module_no_docstring():
             "EG_README.rst",
         ]
 
-
-        with MockCommand('git', LIST_FILES_TEMPLATE.format(
-                python=sys.executable, tracked=tracked)):
+        with MockCommand('git', make_git_script(tracked=tracked)):
             with pytest.raises(common.NoDocstringError) as exc_info:
                 build.main(pyproject)
             assert 'no_docstring.py' in str(exc_info.value)
+
+def test_rebuild(copy_sample):
+    """
+    build artifacts should not cause subsequent builds to fail if no other
+    files were changed
+    """
+    td = copy_sample('module1_toml')
+    (td / '.git').mkdir()   # Fake a git repo
+
+    with MockCommand('git', make_git_script()):
+        res = build.main(td / 'pyproject.toml')
+        res = build.main(td / 'pyproject.toml')