optimize: make relative (#1529)

tests/utils/make_relative_path_spec.lua

@@ -0,0 +1,58 @@
+local assert = require("luassert")
+local utils = require("avante.utils")
+
+describe("make_relative_path", function()
+  it("should remove base directory from filepath", function()
+    local test_filepath = "/path/to/project/src/file.lua"
+    local test_base_dir = "/path/to/project"
+    local result = utils.make_relative_path(test_filepath, test_base_dir)
+    assert.equals("src/file.lua", result)
+  end)
+
+  it("should handle trailing dot-slash in base_dir", function()
+    local test_filepath = "/path/to/project/src/file.lua"
+    local test_base_dir = "/path/to/project/."
+    local result = utils.make_relative_path(test_filepath, test_base_dir)
+    assert.equals("src/file.lua", result)
+  end)
+
+  it("should handle trailing dot-slash in filepath", function()
+    local test_filepath = "/path/to/project/src/."
+    local test_base_dir = "/path/to/project"
+    local result = utils.make_relative_path(test_filepath, test_base_dir)
+    assert.equals("src", result)
+  end)
+
+  it("should handle both having trailing dot-slash", function()
+    local test_filepath = "/path/to/project/src/."
+    local test_base_dir = "/path/to/project/."
+    local result = utils.make_relative_path(test_filepath, test_base_dir)
+    assert.equals("src", result)
+  end)
+
+  it("should return the filepath when base_dir is not a prefix", function()
+    local test_filepath = "/path/to/project/src/file.lua"
+    local test_base_dir = "/different/path"
+    local result = utils.make_relative_path(test_filepath, test_base_dir)
+    assert.equals("/path/to/project/src/file.lua", result)
+  end)
+
+  it("should handle identical paths", function()
+    local test_filepath = "/path/to/project"
+    local test_base_dir = "/path/to/project"
+    local result = utils.make_relative_path(test_filepath, test_base_dir)
+    assert.equals(".", result)
+  end)
+
+  it("should handle empty strings", function()
+    local result = utils.make_relative_path("", "")
+    assert.equals(".", result)
+  end)
+
+  it("should preserve trailing slash in filepath", function()
+    local test_filepath = "/path/to/project/src/"
+    local test_base_dir = "/path/to/project"
+    local result = utils.make_relative_path(test_filepath, test_base_dir)
+    assert.equals("src/", result)
+  end)
+end)