feat: add basic ninjafile support

rc/filetype/ninja.kak

@@ -0,0 +1,111 @@
+# Detection
+# ‾‾‾‾‾‾‾‾‾
+
+hook global BufCreate .+\.ninja %{
+    set-option buffer filetype ninja
+}
+
+
+# Initialization
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+hook global WinSetOption filetype=ninja %{
+    require-module ninja
+
+    set-option window static_words %opt{ninja_static_words}
+
+    hook window ModeChange insert:.* -group ninja-trim-indent  ninja-trim-indent
+    hook window InsertChar \n -group ninja-indent ninja-indent-on-new-line
+    # cleanup trailing whitespaces on current line insert end
+    hook window ModeChange pop:insert:.* -group ninja-trim-indent %{ try %{ execute-keys -draft <semicolon> <a-x> s ^\h+$ <ret> d } }
+
+    hook -once -always window WinSetOption filetype=.* %{ remove-hooks window ninja-.+ }
+}
+
+hook -group ninja-highlight global WinSetOption filetype=ninja %{
+    add-highlighter window/ninja ref ninja
+    hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/ninja }
+}
+
+# Lazy loading
+provide-module ninja %{
+
+# Highlighters
+# ‾‾‾‾‾‾‾‾‾‾‾‾
+
+add-highlighter shared/ninja regions
+
+# `#`
+add-highlighter shared/ninja/comment region '#' '\n' fill comment
+
+# `rule`
+add-highlighter shared/ninja/rule region '^rule' '\n' group
+add-highlighter shared/ninja/rule/rule regex '^rule' 0:keyword
+
+# `command`
+add-highlighter shared/ninja/command region '^\h+command' '[^$]\n' group
+add-highlighter shared/ninja/command/command regex 'command' 0:variable
+add-highlighter shared/ninja/command/equal regex '=' 0:operator
+add-highlighter shared/ninja/command/linebreak regex '\$$' 0:operator
+add-highlighter shared/ninja/command/variables regex '\$\w+|\$\{\w+\}' 0:value
+
+# `build`
+add-highlighter shared/ninja/build region '^build' '\n' group
+add-highlighter shared/ninja/build/build regex '^build\h+' 0:keyword
+add-highlighter shared/ninja/build/rule regex ':\h+(\w+)' 0:function
+add-highlighter shared/ninja/build/colonpipe regex ':|\||\|\|' 0:operator
+
+# variables
+add-highlighter shared/ninja/variable region '^\h*\w+\h+=' '\n' group
+add-highlighter shared/ninja/variable/name regex '(\w+)\h+=' 0:variable
+# TODO: toplevel builddir is conflicting with build
+add-highlighter shared/ninja/variable/equal regex '=' 0:operator
+
+# `default`
+add-highlighter shared/ninja/default region '^default' '\n' group
+add-highlighter shared/ninja/default/default regex '^default' 0:keyword
+
+# `pool`
+add-highlighter shared/ninja/pool region '^pool' '\n' group
+add-highlighter shared/ninja/pool/pool regex '^pool' 0:keyword
+
+# keywords/builtin variable names
+evaluate-commands %sh{
+  keywords="rule build command default"
+  reserved_names="builddir ninja_required_version pool depfile deps depfile msvc_deps_prefix description dyndep generator restat rspfile rspfile_content"
+
+  printf %s "
+      declare-option str-list ninja_static_words ${keywords} ${reserved_names}
+  "
+
+  reserved_names_regex="$(echo ${reserved_names} | tr ' ' '|')"
+  printf %s "
+      add-highlighter shared/ninja/variable/reserved_names regex ${reserved_names_regex} 0:meta
+  "
+}
+
+# Commands
+# ‾‾‾‾‾‾‾‾
+
+define-command -hidden ninja-trim-indent %{
+    # remove trailing white spaces
+    try %{ execute-keys -draft -itersel <a-x> s \h+$ <ret> d }
+}
+
+define-command -hidden ninja-indent-on-new-line %{
+    evaluate-commands -draft -itersel %{
+        # copy -- comments prefix and following white spaces
+        try %{ execute-keys -draft k <a-x> s ^\h*\K--\h* <ret> y gh j P }
+        # preserve previous line indent
+        try %{ execute-keys -draft \; K <a-&> }
+        # filter previous line
+        try %{ execute-keys -draft k : ninja-trim-indent <ret> }
+        # indent after lines begining with rule and pool (do people want build too ?)
+try %{ execute-keys -draft \; k x <a-k> ^(\brule|pool) <ret> j <a-gt> }
+    }
+}
+
+
+}
+
+# ref: https://ninja-build.org/manual.html#ref_ninja_file