feat: add indents.scm for nickel (#4790)

queries/nickel/indents.scm

@@ -0,0 +1,13 @@
+[
+  (term)
+] @indent.begin
+
+[
+  "]"
+  "}"
+] @indent.branch
+
+[
+  "]"
+  "}"
+] @indent.end

scripts/minimal_init.lua

@@ -4,6 +4,7 @@ vim.cmd [[runtime! plugin/nvim-treesitter.lua]]
 
 vim.cmd [[au BufRead,BufNewFile *.conf set filetype=hocon]]
 vim.cmd [[au BufRead,BufNewFile *.gleam set filetype=gleam]]
+vim.cmd [[au BufRead,BufNewFile *.ncl set filetype=nickel]]
 
 vim.o.swapfile = false
 vim.bo.swapfile = false

tests/indent/nickel/indent-newline.ncl

@@ -0,0 +1,9 @@
+{
+  key1 = 1,
+  key2 = [
+    2
+  ],
+  key3 = {
+    key4 = 4
+  }
+}

tests/indent/nickel_spec.lua

@@ -0,0 +1,24 @@
+local Runner = require("tests.indent.common").Runner
+
+local run = Runner:new(it, "tests/indent/nickel", {
+  shiftwidth = 2,
+  expandtab = true,
+})
+
+describe("indent Nickel:", function()
+  describe("whole file:", function()
+    run:whole_file(".", {
+      expected_failures = {},
+    })
+  end)
+
+  describe("new line:", function()
+    run:new_line("indent-newline.ncl", { on_line = 1, text = "stmt", indent = 2 })
+    run:new_line("indent-newline.ncl", { on_line = 2, text = "stmt", indent = 2 })
+    run:new_line("indent-newline.ncl", { on_line = 3, text = "stmt", indent = 4 })
+    run:new_line("indent-newline.ncl", { on_line = 4, text = "]", indent = 2 })
+    run:new_line("indent-newline.ncl", { on_line = 5, text = "stmt", indent = 2 })
+    run:new_line("indent-newline.ncl", { on_line = 6, text = "stmt", indent = 4 })
+    run:new_line("indent-newline.ncl", { on_line = 7, text = "}", indent = 2 })
+  end)
+end)