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meson: fix perl detection when docs are enabled, but perl bindings aren't

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The `perl` variable in meson.build is assigned to a program lookup,
which may have the value "not-found object" if configuring with
`-Dperl=disabled`.

There is already a list of other cases where we do need a perl command,
even when not building perl bindings. Building documentation should be
one of those cases, but was missing from the list. Add it.

Fixes:

```
$ meson setup builddir/ -Ddocs=man -Dperl=disabled -Dtests=false
[...]
Documentation/meson.build:308:22: ERROR: Tried to use not-found external program in "command"
```

Bug: https://bugs.gentoo.org/949247
Signed-off-by: Eli Schwartz <eschwartz@gentoo.org>
Acked-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eli Schwartz 2025-03-16 02:06:05 -04:00 committed by Junio C Hamano
parent 683c54c999
commit 7c8cd9c158
1 changed files with 1 additions and 1 deletions
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meson.build
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@ -772,7 +772,7 @@ endif
# features. It is optional if you want to neither execute tests nor use any of
# these optional features.
perl_required = get_option('perl')
if get_option('tests') or get_option('gitweb').enabled() or 'netrc' in get_option('credential_helpers')
if get_option('tests') or get_option('gitweb').enabled() or 'netrc' in get_option('credential_helpers') or get_option('docs') != []
perl_required = true
endif