initial: github actions, readme

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,26 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Write HCL
+2. ???
+3. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/workflows/acceptance.yaml

@@ -0,0 +1,15 @@
+name: acceptance
+on: [pull_request]
+
+jobs:
+  unittests:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: cachix/[email protected]
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: dx-oss/nix-shell-action@v11
+      with:
+        file: shell.nix
+        script: tree-sitter test

README.md

@@ -0,0 +1,11 @@
+# tree-sitter-promql
+
+tree-sitter grammar for the [promql](https://prometheus.io/docs/prometheus/latest/querying/basics/) language
+
+## Developing
+
+It is recommended to use `nix` to fulfill all development dependencies. To activate the development environment simply run `nix-shell` in the project root.
+
+## Running Tests
+
+To run tests simply run `nix-shell --run 'tree-sitter test'`.

shell.nix

@@ -0,0 +1,12 @@
+let
+  pkgs = import <nixpkgs> { };
+in
+pkgs.mkShell {
+  name = "env";
+  buildInputs = with pkgs; [
+    nodejs
+    tree-sitter
+    emscripten
+  ];
+}
+

test/corpus/binary.txt

@@ -30,3 +30,34 @@ foo - bar
       (metric_name))
     (instant_vector_selector
       (metric_name))))
+
+================================================================================
+binary - error rate
+================================================================================
+
+(sum(rate(http_requests_total{status_code=~"5.*"}[5m]))/sum(rate(http_requests_total[5m])))
+
+--------------------------------------------------------------------------------
+
+(query
+  (binary_expression
+    (aggregation_expression
+      (aggregation_operator)
+      (function_call
+        (function_name)
+        (function_args
+          (range_vector_selector
+            (metric_name)
+            (label_selectors
+              (label_matcher
+                (label_name)
+                (label_value)))
+            (range_selection)))))
+    (aggregation_expression
+      (aggregation_operator)
+      (function_call
+        (function_name)
+        (function_args
+          (range_vector_selector
+            (metric_name)
+            (range_selection)))))))