t0450: add allowlist for builtins with missing .adoc

Before we were silently skipping all builtins that don't have a matching .adoc file. This is overly loose and might skip documentation files when it shouldn't, for example when there was a typo in the filename. To ensure no new builtins are added without documentation, add an allowlist: t0450/adoc-missing. In this file only builtin commands that do *not* have a corresponding .adoc file shall be listed. If there is a mismatch, fail the test. This should force future contributions to either add an .adoc, or add the builtin name to the allowlist file. Signed-off-by: Toon Claes <toon@iotcl.com> [jc: squashed Patrick's "missing file fix" in] Signed-off-by: Junio C Hamano <gitster@pobox.com>

Toon Claes committed Aug 8, 2025 at 11:59 UTC f9a6705d9a1012bc5349a9f010fee3abbf8c53e6
2 files changed +20 -2
t/t0450-txt-doc-vs-help.sh
+11 -2
@@ -112,10 +112,19 @@ do
112 adoc="$(builtin_to_adoc "$builtin")" &&
113 preq="$(echo BUILTIN_ADOC_$builtin | tr '[:lower:]-' '[:upper:]_')" &&
114
115 - if test -f "$adoc"
115 + # If and only if *.adoc is missing, builtin shall be listed in t0450/adoc-missing.
116 + if grep -q "^$builtin$" "$TEST_DIRECTORY"/t0450/adoc-missing
117 then
118 + test_expect_success "$builtin appropriately marked as not having .adoc" '
119 + ! test -f "$adoc"
120 + '
121 + else
122 test_set_prereq "$preq"
118 - fi &&
123 +
124 + test_expect_success "$builtin appropriately marked as having .adoc" '
125 + test -f "$adoc"
126 + '
127 + fi
128
129 # *.adoc output assertions
130 test_expect_success "$preq" "$builtin *.adoc SYNOPSIS has dashed labels" '
t/t0450/adoc-missing new
+9
@@ -0,0 +1,9 @@
1 +checkout--worker
2 +merge-ours
3 +merge-recursive
4 +merge-recursive-ours
5 +merge-recursive-theirs
6 +merge-subtree
7 +pickaxe
8 +submodule--helper
9 +upload-archive--writer