1 files changed, 106 insertions, 0 deletions
diff --git a/autoload/filetype/ninja.kak b/autoload/filetype/ninja.kak
new file mode 100644
index 0000000..757b7ad
--- /dev/null
+++ b/autoload/filetype/ninja.kak
@@ -0,0 +1,106 @@
+# ref: https://ninja-build.org/manual.html#ref_ninja_file
+
+# 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 pop:insert:.* -group ninja-trim-indent ninja-trim-indent
+    hook window InsertChar \n -group ninja-insert ninja-insert-on-new-line
+    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> 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 }
+}
+
+
+provide-module ninja %{
+
+# Highlighters
+# ‾‾‾‾‾‾‾‾‾‾‾‾
+
+add-highlighter shared/ninja regions
+
+# `#`
+add-highlighter shared/ninja/comment region '#' '\n' fill comment
+
+# `subninja`, `include`, `rule`, `pool` and `default` declarations
+add-highlighter shared/ninja/sirpd region '^(subninja|include|rule|pool|default)\b' '(?<!\$)\n' group
+add-highlighter shared/ninja/sirpd/default regex '^(subninja|include)\b' 0:module
+add-highlighter shared/ninja/sirpd/rulepool regex '^(rule|pool|default)\b' 0:keyword
+add-highlighter shared/ninja/sirpd/linebreak regex '\$$' 0:operator
+
+# `build`
+add-highlighter shared/ninja/build region '^build\b' '(?<!\$)\n' group
+add-highlighter shared/ninja/build/build regex '^build\b' 0:keyword
+add-highlighter shared/ninja/build/rule regex ':\h+((\w|-)+)' 0:function
+add-highlighter shared/ninja/build/colonpipe regex ':|\||\|\|' 0:operator
+add-highlighter shared/ninja/build/linebreak regex '\$$' 0:operator
+add-highlighter shared/ninja/build/variables regex '\$(\w|-)+|\$\{(\w|-)+\}' 0:value
+
+# variables declarations
+add-highlighter shared/ninja/variable region '^\h*(\w|-)+\h*=' '(?<!\$)\n' group
+add-highlighter shared/ninja/variable/declaredname regex '^\h*((\w|-)+)\h*(=)' 1:variable 0:operator
+add-highlighter shared/ninja/variable/linebreak regex '\$$' 0:operator
+add-highlighter shared/ninja/variable/variables regex '\$(\w|-)+|\$\{(\w|-)+\}' 0:value
+
+# keywords/builtin variable names
+evaluate-commands %sh{
+  keywords="rule build command default subninja include"
+  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 ${reserved_names} | tr ' ' '|')"
+  printf %s "
+      add-highlighter shared/ninja/variable/reserved_names regex '^\h*(${reserved_names_regex})\b' 0:meta
+  "
+}
+
+
+# Indent
+# ‾‾‾‾‾‾
+
+define-command -hidden ninja-trim-indent %{
+    # remove trailing white spaces
+    try %{ execute-keys -draft -itersel x s \h+$ <ret> d }
+}
+
+define-command -hidden ninja-insert-on-new-line %{
+    evaluate-commands -draft -itersel %{
+        # copy -- comments prefix and following white spaces
+        try %{ execute-keys -draft k x s ^\h*\K--\h* <ret> y gh j P }
+    }
+}
+
+define-command -hidden ninja-indent-on-new-line %{
+    evaluate-commands -draft -itersel %{
+        # 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
+        try %{ execute-keys -draft \; k x <a-k> ^(rule|pool|build)\b <ret> j <a-gt> }
+    }
+}
+
+}