Properly filter out superfluous inverse flags in pip-compile output h…

…eader

Fixes: jazzband#2065
See: jazzband#1197

This is specifically for the --no-reuse-hashes found in
COMPILE_EXCLUDE_OPTIONS but makes way for future inverse flags in the
list too.

piptools/utils.py

@@ -371,9 +371,13 @@ def get_compile_command(click_ctx: click.Context) -> str:
         # Get the latest option name (usually it'll be a long name)
         option_long_name = option.opts[-1]
 
+        negative_option = None
+        if option.is_flag and option.secondary_opts:
+            negative_option = option.secondary_opts[-1]  # get inverse flag --no-{option_long_name}
+
         # Exclude one-off options (--upgrade/--upgrade-package/--rebuild/...)
         # or options that don't change compile behaviour (--verbose/--dry-run/...)
-        if option_long_name in COMPILE_EXCLUDE_OPTIONS:
+        if {option_long_name, negative_option} & COMPILE_EXCLUDE_OPTIONS:
             continue
 
         # Exclude config option if it's the default one

tests/test_utils.py

@@ -374,6 +374,8 @@ def test_is_url_requirement_filename(caplog, from_line, line):
         (["--upgrade"], "pip-compile"),
         (["-P", "django"], "pip-compile"),
         (["--upgrade-package", "django"], "pip-compile"),
+        (["--reuse-hashes"], "pip-compile"),
+        (["--no-reuse-hashes"], "pip-compile"),
         # Check options
         (["--max-rounds", "42"], "pip-compile --max-rounds=42"),
         (["--index-url", "https://foo"], "pip-compile --index-url=https://foo"),