add treesitter plugin to search identifier in project and add to quickfix

diff --git a/plugin/treesitter/project-search.lua b/plugin/treesitter/project-search.lua
new file mode 100644 (file)
index 0000000..9785104
--- /dev/null
+++ b/plugin/treesitter/project-search.lua
@@ -0,0 +1,60 @@
+
+local function project_search()
+    -- get identifier under the cursor
+    local word = vim.fn.expand("<cword>")
+    if word == "" then
+        vim.notify("(search-identifier) no identifier under the cursor found", vim.log.levels.WARN)
+        return
+    end
+
+    local cmd
+    local efm = "%f:%l:%c:%m" -- default error format for ripgrep
+
+    -- determine search tool (prio: ripgrep -> git grep -> grep)
+    if vim.fn.executable("rg") == 1 then
+        cmd = string.format("rg --vimgrep --smart-case --glob='!tags' %s", vim.fn.shellescape(word))
+    elseif vim.fn.executable("git") == 1 and vim.fn.system("git rev-parse --is-inside-work-tree") == "true\n" then
+        cmd = string.format("git grep -n %s -- ':!tags'", vim.fn.shellescape(word))
+        efm = "%f:%l:%m" -- error format for git grep
+    else
+        cmd = string.format("grep -rn --exclude=tags %s .", vim.fn.shellescape(word))
+        efm = "%f:%l:%m" -- error format for grep
+    end
+
+    -- execute command
+    local handle = io.popen(cmd)
+    if not handle then
+        vim.notify("(search-identifier) error while executing search command", vim.log.levels.ERROR)
+        return
+    end
+    local result = handle:read("*a")
+    handle:close()
+
+    if result == "" then
+        vim.notify("(search-identifier) no matches for '" .. word .. "' found.", vim.log.levels.INFO)
+        return
+    end
+
+    -- split results into lines
+    local lines = vim.split(result, "\n", { trimempty = true })
+
+    -- fill quickfix list
+    vim.fn.setqflist({}, "r", {
+        title = "search for: " .. word,
+        lines = lines,
+        efm = efm,
+    })
+
+    -- open quickfix window
+    vim.cmd("copen")
+    vim.notify(string.format("search for '%s' completed (%d matches).", word, #lines), vim.log.levels.INFO)
+end
+
+-- register user command (:ProjectSearch)
+vim.api.nvim_create_user_command("ProjectSearch", project_search, {})
+
+-- Tastenkombination im Normal-Modus: <leader>sw
+vim.keymap.set("n", "<leader>fi", project_search, {
+    desc = "search identifier under cursor in project",
+})
+