introduce CommandNotFoundError for require_command

Author: RonnyPfannschmidt

src/setuptools_scm/_run_cmd.py

@@ -189,6 +189,10 @@ def has_command(
     return res
 
 
+class CommandNotFoundError(LookupError, FileNotFoundError):
+    pass
+
+
 def require_command(name: str) -> None:
     if not has_command(name, warn=False):
-        raise OSError(f"{name!r} was not found")
+        raise CommandNotFoundError(name)

testing/test_git.py

@@ -24,6 +24,7 @@
 from setuptools_scm import git
 from setuptools_scm import NonNormalizedVersion
 from setuptools_scm._file_finders.git import git_find_files
+from setuptools_scm._run_cmd import CommandNotFoundError
 from setuptools_scm._run_cmd import CompletedProcess
 from setuptools_scm._run_cmd import has_command
 from setuptools_scm._run_cmd import run
@@ -93,8 +94,8 @@ def test_root_search_parent_directories(
 
 def test_git_gone(wd: WorkDir, monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.setenv("PATH", str(wd.cwd / "not-existing"))
-    with pytest.raises(EnvironmentError, match="'git' was not found"):
-        git.parse(str(wd.cwd), Configuration(), git.DEFAULT_DESCRIBE)
+    with pytest.raises(CommandNotFoundError, match=r"git"):
+        git.parse(wd.cwd, Configuration(), git.DEFAULT_DESCRIBE)
 
 
 @pytest.mark.issue("https://github.com/pypa/setuptools_scm/issues/298")

testing/test_mercurial.py

@@ -7,6 +7,7 @@
 
 import setuptools_scm._file_finders
 from setuptools_scm import Configuration
+from setuptools_scm._run_cmd import CommandNotFoundError
 from setuptools_scm._run_cmd import has_command
 from setuptools_scm.hg import archival_to_version
 from setuptools_scm.hg import parse
@@ -55,8 +56,8 @@ def test_archival_to_version(expected: str, data: dict[str, str]) -> None:
 def test_hg_gone(wd: WorkDir, monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.setenv("PATH", str(wd.cwd / "not-existing"))
     config = Configuration()
-    with pytest.raises(EnvironmentError, match="'hg' was not found"):
-        parse(str(wd.cwd), config=config)
+    with pytest.raises(CommandNotFoundError, match=r"hg"):
+        parse(wd.cwd, config=config)
 
 
 def test_find_files_stop_at_root_hg(