tools: Make git_log status not-applicable for files with no log.

eris/tools.py

@@ -457,6 +457,19 @@ def godoc(path):
     return Status.normal, stdout
 
 
+@deps(deps={"git"}, url="https://git-scm.com/docs/git-log",
+      executables={"git"})
+def git_log(path):
+    status, output = _run_command(
+        ["git", "log", "--find-renames", "--follow", "--stat", "--color",
+         path], success_status=Status.normal,
+        error_status=Status.not_applicable, has_color=True)
+    if output.data == "":
+        return Status.not_applicable, ""
+    else:
+        return status, output
+
+
 def make_tool_function(dependencies, command, url=None, success_status=None,
                        error_status=None, has_color=False, timeout=None):
     if url is None:
@@ -473,7 +486,7 @@ def make_tool_function(dependencies, command, url=None, success_status=None,
     return func
 
 
-elinks, git_blame, git_log = None, None, None  # For linters.
+elinks, git_blame = None, None  # For linters.
 with importlib.resources.open_text(eris, "tools.toml") as tools_toml_file:
     tools_toml = toml.load(tools_toml_file)
 tools_for_extensions = tools_toml["tools_for_extensions"]

eris/tools.toml

@@ -119,14 +119,6 @@ tools_for_extensions = [
   error_status = "not_applicable"
   has_color = true
 
-[git_log]
-  dependencies = ["git"]
-  url = "https://git-scm.com/docs/git-log"
-  command = "git log --find-renames --follow --stat --color"
-  success_status = "normal"
-  error_status = "not_applicable"
-  has_color = true
-
 [dis]
   dependencies = []
   url = "https://docs.python.org/3/library/dis.html"