feat(templater): add absPath template function (#2788)

Signed-off-by: Mateen Anjum <mateenali66@gmail.com>
Co-authored-by: Valentin Maerten <maerten.valentin@gmail.com>

Author: mateenali66

internal/templater/funcs.go

@@ -34,6 +34,7 @@ func init() {
 		"IsSH":         IsSH, // Deprecated
 		"joinPath":     filepath.Join,
 		"relPath":      filepath.Rel,
+		"absPath":      filepath.Abs,
 		"merge":        merge,
 		"spew":         spew.Sdump,
 		"fromYaml":     fromYaml,

task_test.go

@@ -2601,6 +2601,27 @@ func TestSplitArgs(t *testing.T) {
 	assert.Equal(t, "3\n", buff.String())
 }
 
+func TestAbsPath(t *testing.T) {
+	t.Parallel()
+
+	var buff bytes.Buffer
+	e := task.NewExecutor(
+		task.WithDir("testdata/abs_path"),
+		task.WithStdout(&buff),
+		task.WithStderr(&buff),
+		task.WithSilent(true),
+	)
+	require.NoError(t, e.Setup())
+
+	err := e.Run(t.Context(), &task.Call{Task: "default"})
+	require.NoError(t, err)
+
+	cwd, err := os.Getwd()
+	require.NoError(t, err)
+	expected := filepath.Join(cwd, "bar") + "\n"
+	assert.Equal(t, expected, buff.String())
+}
+
 func TestSingleCmdDep(t *testing.T) {
 	t.Parallel()
 

testdata/abs_path/Taskfile.yml

@@ -0,0 +1,6 @@
+version: '3'
+
+tasks:
+  default:
+    cmds:
+      - cmd: echo '{{absPath "foo/../bar"}}'

website/src/docs/reference/templating.md

@@ -617,6 +617,7 @@ tasks:
       - echo "{{.WIN_PATH | fromSlash}}"                        # Convert to OS-specific slashes
       - echo "{{joinPath .OUTPUT_DIR .BINARY_NAME}}"            # Join path elements
       - echo "Relative {{relPath .ROOT_DIR .TASKFILE_DIR}}"    # Get relative path
+      - echo '{{absPath "../sibling"}}'                         # Resolve to an absolute path
 ```
 
 ### Data Structure Functions