Add Sentinel Grammar (#10)

Add https://github.com/hashicorp/vscode-sentinel/blob/81b8073d4ddb3b670c2a0742b682ef9343b06254/syntaxes/sentinel.tmlanguage.json to project.

- Format file to conform to existing structure in hcl.tmGrammar.json.
- Rename file to sentinel.tmGrammar.json

package.json

@@ -17,9 +17,10 @@
     "check": "prettier --check syntaxes/*.json",
     "format": "prettier --write syntaxes/*.json",
     "test": "npm run test:snap",
-    "test:snap": "npm run test:snap:hcl && npm run test:snap:terraform",
+    "test:snap": "npm run test:snap:hcl && npm run test:snap:sentinel && npm run test:snap:terraform",
     "test:snap:update": "npm run test:snap:hcl -- -u && npm run test:snap:terraform -- -u",
     "test:snap:hcl": "npx vscode-tmgrammar-snap -s source.hcl -g syntaxes/hcl.tmGrammar.json -t \"tests/snapshot/hcl/*.hcl\"",
+    "test:snap:sentinel": "npx vscode-tmgrammar-snap -s source.sentinel -g syntaxes/sentinel.tmGrammar.json -t \"tests/snapshot/sentinel/*.sentinel\"",
     "test:snap:terraform": "npx vscode-tmgrammar-snap -s source.hcl.terraform -g syntaxes/terraform.tmGrammar.json  -g syntaxes/hcl.tmGrammar.json -t \"tests/snapshot/terraform/*.tf\""
   },
   "devDependencies": {

syntaxes/sentinel.tmGrammar.json

@@ -0,0 +1,108 @@
+{
+  "scopeName": "source.sentinel",
+  "name": "HashiCorp Sentinel",
+  "uuid": "B6448CA1-0D29-4C4F-B1F3-5A0B0E875453",
+  "fileTypes": ["sentinel"],
+  "patterns": [
+    {
+      "name": "comment.line.double-slash.sentinel",
+      "match": "\\/\\/.*$"
+    },
+    {
+      "name": "comment.line.number-sign.sentinel",
+      "match": "#.*$"
+    },
+    {
+      "begin": "/\\*",
+      "end": "\\*/",
+      "name": "comment.line.block.sentinel"
+    },
+    {
+      "name": "constant.numeric.hex.sentinel",
+      "match": "\\b0[xX][a-fA-F0-9]+\\b"
+    },
+    {
+      "name": "constant.numeric.oct.sentinel",
+      "match": "\\b0[0-7]+\\b"
+    },
+    {
+      "name": "constant.numeric.number.sentinel",
+      "match": "\\b(([0-9]+\\.?[0-9]*)|(\\.[0-9]+))([eE][-+]?[0-9]+)?\\b"
+    },
+    {
+      "name": "constant.language.sentinel",
+      "match": "\\b(true|false|null|undefined)\\b"
+    },
+    {
+      "captures": {
+        "1": {
+          "name": "keyword.control.when.sentinel"
+        }
+      },
+      "match": "\\b(when)\\b\\s+.*:"
+    },
+    {
+      "captures": {
+        "1": {
+          "name": "keyword.control.else.sentinel"
+        }
+      },
+      "match": "\\b(else)\\b:"
+    },
+    {
+      "name": "keyword.control.declaration.sentinel",
+      "match": "\\b(import|param)\\b"
+    },
+    {
+      "name": "keyword.control.sentinel",
+      "match": "\\b(if|case|for|any|all|filter|break|continue|return)\\b"
+    },
+    {
+      "name": "keyword.operator.symbol.sentinel",
+      "match": "[-+*/%=<>!]"
+    },
+    {
+      "name": "keyword.control.sentinel",
+      "match": "\\b(and|or|contains|in|is|matches|not|xor|else)\\b"
+    },
+    {
+      "name": "keyword.other.sentinel",
+      "match": "\\b(func|rule)\\b"
+    },
+    {
+      "name": "keyword.other.sentinel",
+      "match": "\\b(as|default|when)\\b"
+    },
+    {
+      "patterns": [
+        {
+          "name": "constant.character.escape.single.sentinel",
+          "match": "\\\\[abfnrtv\\\\\"]"
+        },
+        {
+          "name": "constant.character.escape.hex.sentinel",
+          "match": "\\\\x[a-fA-F0-9]+"
+        },
+        {
+          "name": "constant.character.escape.oct.sentinel",
+          "match": "\\\\[0-7]{3}"
+        },
+        {
+          "name": "constant.character.escape.unicode32.sentinel",
+          "match": "\\\\u[a-fA-F0-9]{4}"
+        },
+        {
+          "name": "constant.character.escape.unicode64.sentinel",
+          "match": "\\\\U[a-fA-F0-9]{8}"
+        }
+      ],
+      "begin": "\"",
+      "end": "\"",
+      "name": "string.quoted.double.untitled"
+    },
+    {
+      "name": "support.function.builtin.sentinel",
+      "match": "\\b(append|delete|error|keys|length|print|range|values|int|float|string|bool)\\b"
+    }
+  ]
+}

tests/snapshot/sentinel/basic.sentinel

@@ -0,0 +1,9 @@
+hour = 4
+
+past_midnight = rule { hour >= 0 }
+before_noon   = rule { hour < 12 }
+
+main = rule {
+    past_midnight and
+    before_noon
+}

tests/snapshot/sentinel/basic.sentinel.snap

@@ -0,0 +1,42 @@
+>hour = 4
+#^^^^^ source.sentinel
+#     ^ source.sentinel keyword.operator.symbol.sentinel
+#      ^ source.sentinel
+#       ^ source.sentinel constant.numeric.number.sentinel
+>
+>past_midnight = rule { hour >= 0 }
+#^^^^^^^^^^^^^^ source.sentinel
+#              ^ source.sentinel keyword.operator.symbol.sentinel
+#               ^ source.sentinel
+#                ^^^^ source.sentinel keyword.other.sentinel
+#                    ^^^^^^^^ source.sentinel
+#                            ^ source.sentinel keyword.operator.symbol.sentinel
+#                             ^ source.sentinel keyword.operator.symbol.sentinel
+#                              ^ source.sentinel
+#                               ^ source.sentinel constant.numeric.number.sentinel
+#                                ^^^ source.sentinel
+>before_noon   = rule { hour < 12 }
+#^^^^^^^^^^^^^^ source.sentinel
+#              ^ source.sentinel keyword.operator.symbol.sentinel
+#               ^ source.sentinel
+#                ^^^^ source.sentinel keyword.other.sentinel
+#                    ^^^^^^^^ source.sentinel
+#                            ^ source.sentinel keyword.operator.symbol.sentinel
+#                             ^ source.sentinel
+#                              ^^ source.sentinel constant.numeric.number.sentinel
+#                                ^^^ source.sentinel
+>
+>main = rule {
+#^^^^^ source.sentinel
+#     ^ source.sentinel keyword.operator.symbol.sentinel
+#      ^ source.sentinel
+#       ^^^^ source.sentinel keyword.other.sentinel
+#           ^^^ source.sentinel
+>    past_midnight and
+#^^^^^^^^^^^^^^^^^^ source.sentinel
+#                  ^^^ source.sentinel keyword.control.sentinel
+>    before_noon
+#^^^^^^^^^^^^^^^^ source.sentinel
+>}
+#^^ source.sentinel
+>