Add .resource extension to Robot Framework (#6500)

* add .resource extension to robot

* add resource file example

* docs

* add heuristics for RF resource files

* fix typo

* add robotframework keywords heuristic

---------

Co-authored-by: Colin Seymour <[email protected]>

lib/linguist/generic.yml

@@ -16,6 +16,7 @@ extensions:
 - ".9"
 - ".app"
 - ".cmp"
+- ".resource"
 - ".sol"
 - ".stl"
 - ".tag"

lib/linguist/heuristics.yml

@@ -656,6 +656,11 @@ disambiguations:
     pattern:
     - '^\s*(let|module|type)\s+\w*\s+=\s+'
     - '^\s*(?:include|open)\s+\w+\s*$'
+- extensions: ['.resource']
+  rules:
+  - language: RobotFramework
+    pattern:
+    - '^\*{3} (Settings|Variables|Keywords) \*{3}$'
 - extensions: ['.rno']
   rules:
   - language: RUNOFF

lib/linguist/languages.yml

@@ -6207,6 +6207,7 @@ RobotFramework:
   color: "#00c0b5"
   extensions:
   - ".robot"
+  - ".resource"
   tm_scope: text.robot
   ace_mode: text
   language_id: 324

samples/RobotFramework/keywords.resource

@@ -0,0 +1,21 @@
+*** Settings ***
+Documentation       Example keywords file.
+...                 It is recommended to use another ending than `.robot` for resource files.
+...                 By convention, the file ending for resource files is `.resource`.
+...                 Another resource than `.robot` makes maintaining large projects easier. It also prevents
+...                 the parser to search for tasks or test cases in resource files, which saves some startup performance.
+
+Library             Collections
+
+
+*** Variables ***
+${variable}     ${EMPTY}
+${some_list}    @{EMPTY}
+${some_dict}    &{EMPTY}
+
+
+*** Keywords ***
+Dictionary Should Contain ${key}=${value}
+    [Arguments]    ${dict}
+    Dictionary Should Contain Key    ${dict}    ${key}
+    Should Be Equal    ${dict}[key]    ${value}    msg=Dictionary does not hold expected item.

test/test_heuristics.rb

@@ -885,6 +885,12 @@ def test_res_by_heuristics
     })
   end
 
+  def test_resource_by_heuristics
+    assert_heuristics({
+      "RobotFramework" => all_fixtures("RobotFramework", "*.resource")
+    })
+  end
+
   def test_rno_by_heuristics
     assert_heuristics({
       "RUNOFF" => all_fixtures("RUNOFF", "*.rno"),