Range.from_motion: preserve jumplist

AGENTS.md

@@ -0,0 +1,34 @@
+# AGENTS.md
+
+## Project
+
+Single-file Neovim Lua micro-library (`lua/u.lua`) for range-based text operations, positions, operator-pending mappings, and text objects. Not a plugin — meant to be vendored by other plugins.
+
+## Commands
+
+All tasks use `mise`:
+
+- `mise run fmt` — format (stylua)
+- `mise run fmt:check` — check formatting
+- `mise run lint` — type-check with `emmylua_check` (ignores `.prefix/`)
+- `mise run test` — run busted against Neovim 0.12.1 (includes `test:prepare`)
+- `mise run test:all` — test against 0.11.5, 0.12.1, and nightly
+- `mise run test:coverage` — test with luacov (only covers `lua/u$`)
+- `mise run ci` — `fmt:check` → `lint` → `test:all`
+
+Run a single spec file: `busted spec/u_spec.lua` (after `mise run test:prepare`).
+
+## Architecture
+
+- **`lua/u.lua`** — the entire library (~1300 lines): `Pos`, `Range`, `opkeymap`, `define_txtobj`, `ucmd`, `repeat_`
+- **`spec/u_spec.lua`** — all tests in one file
+- **`library/`** — type stubs for busted/luv (stylua-ignored, used by emmylua)
+- **`.prefix/`** — neovim version installs managed by `nvimv` (git-ignored, emmylua-ignored)
+- **`examples/`** — usage examples (surround, splitjoin, text-objects, matcher)
+
+## Conventions
+
+- **1-based indexing** everywhere (v2+). `Pos.from00()` / `Range.from00()` convert from 0-based Neovim API values.
+- Stylua: LuaJIT syntax, single quotes, no call parens, 2-space indent, sort requires, 100 col width
+- Tests run inside Neovim via busted's `lua = "nvim -u NONE -i NONE -l"` (set in `.busted`)
+- `test:prepare` installs busted rocks via `luarocks test --prepare` and manages nightly Neovim via `nvimv`

lua/u.lua

@@ -552,12 +552,10 @@ function Range.from_motion(motion, opts)
     local old_eventignore = vim.o.eventignore
     vim.o.eventignore = 'all'
     vim.go.operatorfunc = 'v:lua.Range__from_motion_opfunc'
-    vim.cmd {
-      cmd = 'normal',
-      bang = not opts.user_defined,
-      args = { ESC .. 'g@' .. motion },
-      mods = { silent = true },
-    }
+    vim.cmd(
+      'keepjumps normal' .. (not opts.user_defined and '!' or '') .. ' ' .. ESC .. 'g@' .. motion,
+      { mods = { silent = true } }
+    )
     vim.o.eventignore = old_eventignore
   end)
   local captured_range = _G.Range__from_motion_opfunc_captured_range

spec/u_spec.lua

@@ -372,6 +372,85 @@ describe('Range', function()
     vim.api.nvim_buf_delete(buf2, { force = true })
   end)
 
+  it('from_motion does not modify the jumplist', function()
+    withbuf({
+      'line1',
+      '(hello world)',
+      'line3',
+      '{foo bar}',
+      'line5',
+    }, function()
+      -- Build up a jumplist that includes line 2:
+      vim.cmd.normal { args = { '5G' }, bang = true }
+      vim.cmd.normal { args = { '2G' }, bang = true }
+      vim.cmd.normal { args = { '4G' }, bang = true }
+      vim.cmd.normal { args = { '5G' }, bang = true }
+
+      -- Position cursor on line 2 (which is in the jumplist), inside the parens
+      vim.fn.setpos('.', { 0, 2, 3, 0 })
+
+      local jl_before = vim.fn.getjumplist()
+      local n_before = #jl_before[1]
+      local curjump_before = jl_before[2]
+
+      -- g@a( corrupts the jumplist by deduplicating the entry for line 2.
+      -- This is a query-only operation and should NOT change the jumplist:
+      Range.from_motion('a(', { contains_cursor = true })
+
+      local jl_after = vim.fn.getjumplist()
+
+      assert.are.same(
+        n_before,
+        #jl_after[1],
+        'from_motion should not add or remove jumplist entries'
+      )
+      assert.are.same(
+        curjump_before,
+        jl_after[2],
+        'from_motion should not change the curjump pointer'
+      )
+    end)
+  end)
+
+  it('find_nearest_brackets does not modify the jumplist', function()
+    withbuf({
+      'line1',
+      '(hello world)',
+      'line3',
+      '{foo bar}',
+      'line5',
+    }, function()
+      -- Build up a jumplist:
+      vim.cmd.normal { args = { '5G' }, bang = true }
+      vim.cmd.normal { args = { '2G' }, bang = true }
+      vim.cmd.normal { args = { '4G' }, bang = true }
+      vim.cmd.normal { args = { '5G' }, bang = true }
+
+      -- Move to a line near brackets
+      vim.fn.setpos('.', { 0, 2, 3, 0 })
+
+      local jl_before = vim.fn.getjumplist()
+      local n_before = #jl_before[1]
+      local curjump_before = jl_before[2]
+
+      -- This calls from_motion internally and should NOT change the jumplist:
+      Range.find_nearest_brackets()
+
+      local jl_after = vim.fn.getjumplist()
+
+      assert.are.same(
+        n_before,
+        #jl_after[1],
+        'find_nearest_brackets should not add or remove jumplist entries'
+      )
+      assert.are.same(
+        curjump_before,
+        jl_after[2],
+        'find_nearest_brackets should not change the curjump pointer'
+      )
+    end)
+  end)
+
   it('from_motion restores visual selection when started in visual mode', function()
     withbuf({ 'the quick brown fox' }, function()
       -- Enter visual mode first