build: build help.h with meson

doc/meson.build

@@ -1,8 +1,4 @@
-scdoc_prog = find_program(scdoc.get_pkgconfig_variable('scdoc'), native: true)
-sh = find_program('sh', native: true)
-mandir = get_option('mandir')
-
-man_files = [
+man_files = files(
     'apk.8.scd',
     'apk-add.8.scd',
     'apk-audit.8.scd',
@@ -25,22 +21,28 @@ man_files = [
     'apk-verify.8.scd',
     'apk-version.8.scd',
     'apk-world.5.scd',
-]
+)
 
-foreach filename : man_files
-    topic = filename.split('.')[-3].split('/')[-1]
-    section = filename.split('.')[-2]
-    output = '@0@.@1@'.format(topic, section)
+if scdoc_dep.found()
+    scdoc_prog = find_program(scdoc_dep.get_pkgconfig_variable('scdoc'), native: true)
+    sh = find_program('sh', native: true)
+    mandir = get_option('mandir')
 
-    custom_target(
-        output,
-        input: filename,
-        capture: true,
-        output: output,
-        command: [
-            sh, '-c', '@0@ < @INPUT@'.format(scdoc_prog.path())
-        ],
-        install: true,
-        install_dir: '@0@/man@1@'.format(mandir, section)
-    )
-endforeach
+    foreach filename : man_files
+        topic = '@0@'.format(filename).split('.')[-3].split('/')[-1]
+        section = '@0@'.format(filename).split('.')[-2]
+        output = '@0@.@1@'.format(topic, section)
+
+        custom_target(
+            output,
+            input: filename,
+            capture: true,
+            output: output,
+            command: [
+                sh, '-c', '@0@ < @INPUT@'.format(scdoc_prog.path())
+            ],
+            install: true,
+            install_dir: '@0@/man@1@'.format(mandir, section)
+        )
+    endforeach
+endif

meson.build

@@ -13,7 +13,7 @@ apk_libdir = get_option('libdir')
 zlib_dep = dependency('zlib')
 openssl_dep = dependency('openssl')
 lua_dep = dependency('lua' + get_option('lua_version'), required: get_option('lua'))
-scdoc = dependency('scdoc', version: '>=1.10', required: get_option('docs'))
+scdoc_dep = dependency('scdoc', version: '>=1.10', required: get_option('docs'))
 
 add_project_arguments('-D_GNU_SOURCE', language: 'c')
 
@@ -23,9 +23,6 @@ if get_option('default_library') == 'static'
     add_project_arguments('-DOPENSSL_NO_ENGINE', language: 'c')
 endif
 
+subdir('doc')
 subdir('libfetch')
 subdir('src')
-
-if scdoc.found()
-    subdir('doc')
-endif

src/meson.build

@@ -51,8 +51,21 @@ apk_src = [
     'app_stats.c',
     'app_verify.c',
     'app_version.c',
+    'help.c',
 ]
 
+genhelp_script = find_program('genhelp.lua')
+
+generated_help = custom_target(
+    'help.h',
+    capture: true,
+    output: 'help.h',
+    input: man_files,
+    command: [genhelp_script, '@INPUT@'],
+)
+
+apk_src += [ generated_help ]
+
 apk_cargs = [
     '-DAPK_VERSION="' + meson.project_version() + '"',
     '-D_ATFILE_SOURCE',