Add a way to change the working directory

.vscode/settings.json

@@ -3,6 +3,7 @@
         "Dadido",
         "Foogaloo",
         "golangci",
+        "somepath",
         "typst",
         "Vogel"
     ]

cli.go

@@ -17,7 +17,8 @@ import (
 // TODO: Add an interface for the Typst caller and let CLI (and later docker and WASM) be implementations of that
 
 type CLI struct {
-	ExecutablePath string // The Typst executable path can be overridden here. Otherwise the default path will be used.
+	ExecutablePath   string // The Typst executable path can be overridden here. Otherwise the default path will be used.
+	WorkingDirectory string // The path where the Typst executable is run in. When left empty, the Typst executable will be run in the process's current directory.
 }
 
 // TODO: Add method for querying the Typst version resulting in a semver object
@@ -31,6 +32,7 @@ func (c CLI) VersionString() (string, error) {
 	}
 
 	cmd := exec.Command(execPath, "--version")
+	cmd.Dir = c.WorkingDirectory // This doesn't do anything, but we will do it anyways for consistency.
 
 	var output, errBuffer bytes.Buffer
 	cmd.Stdout = &output
@@ -64,6 +66,7 @@ func (c CLI) Compile(input io.Reader, output io.Writer, options *CLIOptions) err
 	}
 
 	cmd := exec.Command(execPath, args...)
+	cmd.Dir = c.WorkingDirectory
 	cmd.Stdin = input
 	cmd.Stdout = output
 

cli_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2024 David Vogel
+// Copyright (c) 2024-2025 David Vogel
 //
 // This software is released under the MIT License.
 // https://opensource.org/licenses/MIT
@@ -9,6 +9,7 @@ import (
 	"bytes"
 	"image"
 	_ "image/png"
+	"path/filepath"
 	"strconv"
 	"testing"
 
@@ -60,3 +61,22 @@ func TestCLI_Compile(t *testing.T) {
 		t.Fatalf("Resulting image height is %d, expected %d.", imgConf.Height, inches*ppi)
 	}
 }
+
+// Test basic compile functionality with a given working directory.
+func TestCLI_CompileWithWorkingDir(t *testing.T) {
+	cli := typst.CLI{
+		WorkingDirectory: filepath.Join(".", "test-files"),
+	}
+
+	r := bytes.NewBufferString(`#import "hello-world-template.typ": template
+#show: doc => template()`)
+
+	var w bytes.Buffer
+	err := cli.Compile(r, &w, nil)
+	if err != nil {
+		t.Fatalf("Failed to compile document: %v.", err)
+	}
+	if w.Available() == 0 {
+		t.Errorf("No output was written.")
+	}
+}