meson: add manpages for old cli and config files

Change-Id: I93384ec774d1945a649f6aaf7cd967c3fb7197f9

doc/manual/meson.build

@@ -0,0 +1,165 @@
+nix_env_for_docs = {
+  'HOME': '/dummy',
+  'NIX_CONF_DIR': '/dummy',
+  'NIX_SSL_CERT_FILE': '/dummy/no-ca-bundle.crt',
+  'NIX_STATE_DIR': '/dummy',
+  'NIX_CONFIG': 'cores = 0',
+}
+
+nix_for_docs = [ nix, '--experimental-features', 'nix-command' ]
+nix_eval_for_docs = nix_for_docs + [
+  'eval',
+  '-I', 'nix/corepkgs=corepkgs',
+  '--store', 'dummy://',
+  '--impure',
+  '--raw',
+]
+
+nix_conf_file_json = custom_target(
+  command : nix_for_docs + [ 'show-config', '--json' ],
+  capture : true,
+  output : 'conf-file.json',
+  env : nix_env_for_docs,
+)
+
+nix_conf_file_md_body = custom_target(
+  command : nix_eval_for_docs + [
+    '--expr',
+    '(import @INPUT0@).showSettings { inlineHTML = true; } (builtins.fromJSON (builtins.readFile @INPUT1@))',
+  ],
+  capture : true,
+  input : [
+    'utils.nix',
+    nix_conf_file_json,
+  ],
+  output : 'conf-file.md.body',
+  env : nix_env_for_docs,
+)
+
+nix_conf_file_md = custom_target(
+  command : [ 'cat', '@INPUT@' ],
+  capture : true,
+  input : [
+    'src/command-ref/conf-file-prefix.md',
+    nix_conf_file_md_body,
+  ],
+  output : 'conf-file.md',
+)
+
+nix_exp_features_json = custom_target(
+  command : [ nix, '__dump-xp-features' ],
+  capture : true,
+  output : 'xp-features.json',
+)
+nix_exp_feature_shortlist = custom_target(
+  command : nix_eval_for_docs + [
+    '--expr',
+    'import @INPUT0@ (builtins.fromJSON (builtins.readFile @INPUT1@))',
+  ],
+  input : [
+    'generate-xp-features-shortlist.nix',
+    nix_exp_features_json,
+  ],
+  output : 'experimental-features-shortlist.md',
+  capture : true,
+  env : nix_env_for_docs,
+)
+
+nix_nested_manpages = [
+  [ 'nix-env',
+    [
+      'delete-generations',
+      'install',
+      'list-generations',
+      'query',
+      'rollback',
+      'set-flag',
+      'set',
+      'switch-generation',
+      'switch-profile',
+      'uninstall',
+      'upgrade',
+    ],
+  ],
+  [ 'nix-store',
+    [
+      'add-fixed',
+      'add',
+      'delete',
+      'dump-db',
+      'dump',
+      'export',
+      'gc',
+      'generate-binary-cache-key',
+      'import',
+      'load-db',
+      'optimise',
+      'print-env',
+      'query',
+      'read-log',
+      'realise',
+      'repair-path',
+      'restore',
+      'serve',
+      'verify',
+      'verify-path',
+    ],
+  ],
+]
+
+foreach command : nix_nested_manpages
+  foreach page : command[1]
+    custom_target(
+      command : [
+        './render-manpage.sh',
+        '--unescape-dashes',
+        command[0] + ' --' + page,
+        '1',
+        '@INPUT@',
+        '@OUTPUT@.tmp',
+        '@OUTPUT@',
+      ],
+      input : 'src/command-ref' / command[0] / (page + '.md'),
+      output : command[0] + '-' + page + '.1',
+      install : true,
+      install_dir : mandir / 'man1',
+    )
+  endforeach
+endforeach
+
+nix_manpages = [
+  [ 'nix-env', 1 ],
+  [ 'nix-store', 1 ],
+  [ 'nix-build', 1 ],
+  [ 'nix-shell', 1 ],
+  [ 'nix-instantiate', 1 ],
+  [ 'nix-collect-garbage', 1 ],
+  [ 'nix-prefetch-url', 1 ],
+  [ 'nix-channel', 1 ],
+  [ 'nix-hash', 1 ],
+  [ 'nix-copy-closure', 1 ],
+  [ 'nix.conf', 5, nix_conf_file_md, nix_exp_feature_shortlist ],
+  [ 'nix-daemon', 8 ],
+  [ 'nix-profiles', 5, 'src/command-ref/files/profiles.md', nix_exp_feature_shortlist ],
+]
+
+foreach entry : nix_manpages
+  custom_target(
+    command : [
+      './render-manpage.sh',
+      entry[0],
+      entry[1].to_string(),
+      '@INPUT0@',
+      '@OUTPUT@.tmp',
+      '@OUTPUT@',
+      meson.current_build_dir(),
+    ],
+    input : [
+      entry.get(2, 'src/command-ref' / (entry[0] + '.md')),
+      entry.get(3, []),
+    ],
+    output : '@0@.@1@'.format(entry[0], entry[1]),
+    install : true,
+    install_dir : mandir / 'man@0@'.format(entry[1]),
+  )
+endforeach

doc/manual/process-includes.sh

@@ -2,11 +2,31 @@
 
 set -euo pipefail
 
+infile="$1"
+outfile="$2"
+shift 2
+
+# set a search path for includes. the old makefile-based system splorked
+# everything into the source tree and was thus able to not have a search
+# path, but the meson system generates intermediate files into dedicated
+# directories separate from the source. we still retain the implicit old
+# behavior for now as the base search path, once meson is the default we
+# can revisit this and remove the implicit search path entry. it's fine.
+set -- "$(dirname "$infile")" "$@"
+
 # re-implement mdBook's include directive to make it usable for terminal output and for proper @docroot@ substitution
-(grep '{{#include' "$1" || true) | while read -r line; do
-    filename="$(dirname "$1")/$(printf "$line" | sed 's/{{#include \(.*\)}}/\1/')"
-    test -f "$filename" || ( echo "#include-d file '$filename' does not exist." >&2; exit 1; )
+(grep '{{#include' "$infile" || true) | while read -r line; do
+    found=false
+    include="$(printf "$line" | sed 's/{{#include \(.*\)}}/\1/')"
+    for path in "$@"; do
+        filename="$path/$include"
+        if [ -e "$filename" ]; then
+            found=true
             matchline="$(printf "$line" | sed 's|/|\\/|g')"
-    sed -i "/$matchline/r $filename" "$2"
-    sed -i "s/$matchline//" "$2"
+            sed -i "/$matchline/r $filename" "$outfile"
+            sed -i "s/$matchline//" "$outfile"
+            break
+        fi
+    done
+    $found || ( echo "#include-d file '$filename' does not exist." >&2; exit 1; )
 done

meson.build

@@ -356,6 +356,7 @@ endif
 subdir('src')
 subdir('scripts')
 subdir('misc')
+subdir('doc/manual')
 
 if enable_tests
   subdir('tests/unit')