Just: make three recipes do what they said

`misc/codegen`'s `test` declared arguments and passed none on, so anything given
to it was accepted and discarded.

`_ensure_long_filename` ran before the dependency that checks for an internal
checkout, so outside one it built a path from an unset variable and created
directories at the filesystem root, or failed on permissions while saying
nothing about the real reason.

The Kotlin shards pointed at a recipe name that exists nowhere. They are reached
by naming their directory, which is what opting out of a downward search leaves.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: redsun82

java/ql/test-kotlin1/justfile

@@ -1,7 +1,8 @@
 import "../justfile"
 
-# These are CI shards of the Kotlin language tests, run as `just java
-# kotlin-language-tests-1`, so they only run when asked for by name.
+# These are CI shards of the Kotlin language tests, too long to run by accident,
+# so a verb coming from above passes over them and they run only when this
+# directory is named.
 explicit_verbs := ['test']
 
 # Kotlin tests may fail the diags.ql consistency test if the diagnostic limit is set.

java/ql/test-kotlin2/justfile

@@ -1,7 +1,8 @@
 import "../justfile"
 
-# These are CI shards of the Kotlin language tests, run as `just java
-# kotlin-language-tests-2`, so they only run when asked for by name.
+# These are CI shards of the Kotlin language tests, too long to run by accident,
+# so a verb coming from above passes over them and they run only when this
+# directory is named.
 explicit_verbs := ['test']
 
 # Kotlin tests may fail the diags.ql consistency test if the diagnostic limit is set.

misc/codegen/justfile

@@ -1,5 +1,5 @@
 import "../just/lib.just"
 
-test *ARGS="": (_bazel ['test', '@codeql//misc/codegen/...'])
+test *ARGS: (_bazel (['test', '@codeql//misc/codegen/...'] ++ ARGS))
 
 format *ARGS=".": (_format_py ARGS)

python/justfile

@@ -6,7 +6,7 @@ build: (_build_dist "python")
 
 # Long filename needed for extractor tests (too long for Git on Windows)
 [no-cd]
-@_ensure_long_filename:
+@_ensure_long_filename: _require_semmle_code
     #!/usr/bin/env bash
     longfile="$SEMMLE_CODE/ql/python/ql/test/extractor-tests/long_path/really_rather_too_long_for_windows_path_length/with_unecessarily_longwinded_and_verbose_sub_folder/extremely_long_module_name_with_lots_of_digits_at_the_end_000000000000000000000000000000000000000000000000000000000000000000/test0000000000000000000000000000000000000000000000000000000.py"
     mkdir -p "$(dirname "$longfile")"