Support dockerfiles (#1303)

* allow language.config (in languages.toml) to be passed in as a toml object

* Change config field for languages from json string to toml object

* remove indents on languages.toml config

* fix: remove patch version from serde_json import in helix-core

* Use same tree-sitter-zig as upstream/master

* fix(completion_popup): Fixes #1256

* Update helix-term/src/ui/completion.rs

* feat(languages): Add support for `Dockerfile`s

* docs(cargo-xtask-docgen):

* improvement(langs-dockerfile): Add `injection-regex` to `languages.toml` for
`Dockerfile`

* improvement(langs-dockerfile): Add injections.scm

* Update .gitmodules

Co-authored-by: Blaž Hrastnik <blaz@mxxn.io>

6 files changed, 73 insertions, 0 deletions

diff --git a/.gitmodules b/.gitmodules
index dcec2813..edfe3c39 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -162,6 +162,10 @@
 	path = helix-syntax/languages/tree-sitter-dart
 	url = https://github.com/UserNobody14/tree-sitter-dart.git
 	shallow = true
+[submodule "helix-syntax/languages/tree-sitter-dockerfile"]
+	path = helix-syntax/languages/tree-sitter-dockerfile
+	url = https://github.com/camdencheek/tree-sitter-dockerfile.git
+  	shallow = true
 [submodule "helix-syntax/languages/tree-sitter-fish"]
 	path = helix-syntax/languages/tree-sitter-fish
 	url = https://github.com/ram02z/tree-sitter-fish
diff --git a/book/src/generated/lang-support.md b/book/src/generated/lang-support.md
index 24b75b64..c7054201 100644
--- a/book/src/generated/lang-support.md
+++ b/book/src/generated/lang-support.md
@@ -8,6 +8,7 @@
 | cpp | ✓ |  |  | `clangd` |
 | css | ✓ |  |  |  |
 | dart | ✓ |  | ✓ | `dart` |
+| dockerfile | ✓ |  |  | `docker-langserver` |
 | elixir | ✓ |  |  | `elixir-ls` |
 | fish | ✓ | ✓ | ✓ |  |
 | glsl | ✓ |  | ✓ |  |
diff --git a/helix-syntax/languages/tree-sitter-dockerfile b/helix-syntax/languages/tree-sitter-dockerfile
new file mode 160000
+Subproject 7af32bc04a66ab196f5b9f92ac471f29372ae2c
diff --git a/languages.toml b/languages.toml
index 61eb47ec..50c6f7f9 100644
--- a/languages.toml
+++ b/languages.toml
@@ -467,3 +467,14 @@ file-types = ["scala", "sbt"]
 comment-token = "//"
 indent = { tab-width = 2, unit = "  " }
 language-server = { command = "metals" }
+
+[[language]]
+name = "dockerfile"
+scope = "source.dockerfile"
+injection-regex = "docker|dockerfile"
+roots = ["Dockerfile"]
+file-types = ["Dockerfile"]
+comment-token = "#"
+indent = { tab-width = 2, unit = "  " }
+language-server = { command = "docker-langserver", args = ["--stdio"] }
+
diff --git a/runtime/queries/dockerfile/highlights.scm b/runtime/queries/dockerfile/highlights.scm
new file mode 100644
index 00000000..5a945fb9
--- /dev/null
+++ b/runtime/queries/dockerfile/highlights.scm
@@ -0,0 +1,51 @@
+[
+	"FROM"
+	"AS"
+	"RUN"
+	"CMD"
+	"LABEL"
+	"EXPOSE"
+	"ENV"
+	"ADD"
+	"COPY"
+	"ENTRYPOINT"
+	"VOLUME"
+	"USER"
+	"WORKDIR"
+	"ARG"
+	"ONBUILD"
+	"STOPSIGNAL"
+	"HEALTHCHECK"
+	"SHELL"
+	"MAINTAINER"
+	"CROSS_BUILD"
+] @keyword
+
+[
+	":"
+	"@"
+] @operator
+
+(comment) @comment
+
+
+(image_spec
+	(image_tag
+		":" @punctuation.special)
+	(image_digest
+		"@" @punctuation.special))
+
+(double_quoted_string) @string
+
+(expansion
+  [
+	"$"
+	"{"
+	"}"
+  ] @punctuation.special
+) @none
+
+((variable) @constant
+ (#match? @constant "^[A-Z][A-Z_0-9]*$"))
+
+
diff --git a/runtime/queries/dockerfile/injections.scm b/runtime/queries/dockerfile/injections.scm
new file mode 100644
index 00000000..20396f1a
--- /dev/null
+++ b/runtime/queries/dockerfile/injections.scm
@@ -0,0 +1,6 @@
+((comment) @injection.content
+ (#set! injection.language "comment"))
+
+([(shell_command) (shell_fragment)] @injection.content
+ (#set! injection.language "bash"))
+