docs: Make documentation build depend on -Dlibnvme and -Dnvme

Tie documentation generation to the meson options -Dlibnvme and
-Dnvme so the build can selectively generate documentation for
libnvme, nvme, or both.

Signed-off-by: Martin Belanger <[email protected]>

Author: Martin Belanger

libnvme/meson.build

@@ -38,6 +38,8 @@ if want_libnvme
     if get_option('examples')
         subdir('examples')
     endif
+
+    subdir('doc')
 else
     # Fallback to using a pre-installed libnvme (if available)
     if std_prefix
@@ -59,4 +61,3 @@ else
     endif
 endif
 
-subdir('doc')

meson.build

@@ -596,9 +596,9 @@ if want_nvme
         'completions/_nvme',
         install_dir: datadir / 'zsh/site-functions',
     )
-endif
 
-subdir('Documentation')
+    subdir('Documentation')
+endif
 
 
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