Allow it to compile on unsupported platforms

.vscode/settings.json

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

cli-options_test.go

@@ -1,3 +1,8 @@
+// Copyright (c) 2025 David Vogel
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
 package typst_test
 
 import (
@@ -15,10 +20,10 @@ func TestCliOptions(t *testing.T) {
 	if len(args) != 2 {
 		t.Errorf("wrong number of arguments, expected 2, got %d", len(args))
 	}
-	if "--font-path" != args[0] {
+	if args[0] != "--font-path" {
 		t.Error("wrong font path option, expected --font-path, got", args[0])
 	}
-	if "somepath/to/somewhere"+string(os.PathListSeparator)+"another/to/somewhere" != args[1] {
+	if args[1] != "somepath/to/somewhere"+string(os.PathListSeparator)+"another/to/somewhere" {
 		t.Error("wrong font path option, expected my two paths concatenated, got", args[1])
 	}
 }

cli.go

@@ -14,8 +14,11 @@ import (
 
 // TODO: Add docker support to CLI, by calling docker run instead
 
+// 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
@@ -27,8 +30,12 @@ func (c CLI) VersionString() (string, error) {
 	if c.ExecutablePath != "" {
 		execPath = c.ExecutablePath
 	}
+	if execPath == "" {
+		return "", fmt.Errorf("go-typst doesn't support this platform")
+	}
 
 	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
@@ -60,8 +67,12 @@ func (c CLI) Compile(input io.Reader, output io.Writer, options *CLIOptions) err
 	if c.ExecutablePath != "" {
 		execPath = c.ExecutablePath
 	}
+	if execPath == "" {
+		return fmt.Errorf("go-typst doesn't support this platform")
+	}
 
 	cmd := exec.Command(execPath, args...)
+	cmd.Dir = c.WorkingDirectory
 	cmd.Stdin = input
 	cmd.Stdout = output
 

cli_js.go

@@ -0,0 +1,12 @@
+// Copyright (c) 2025 David Vogel
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+//go:build js
+
+package typst
+
+// The path to the Typst executable.
+// We leave that empty as we don't support this platform for now.
+var ExecutablePath = ""

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.")
+	}
+}

cli_wasi.go

@@ -0,0 +1,12 @@
+// Copyright (c) 2025 David Vogel
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+//go:build wasip1
+
+package typst
+
+// The path to the Typst executable.
+// We leave that empty as we don't support this platform for now.
+var ExecutablePath = ""

image_test.go

@@ -1,3 +1,8 @@
+// Copyright (c) 2025 David Vogel
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
 package typst_test
 
 import (

readme_test.go

@@ -1,3 +1,8 @@
+// Copyright (c) 2025 David Vogel
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
 package typst_test
 
 import (

test-files/hello-world-template.typ

@@ -0,0 +1,5 @@
+#let template() = {
+  set page(width: auto, height: auto, margin: 5mm)
+
+  heading("Hello World!")
+}

test-files/hello-world.typ

@@ -0,0 +1,3 @@
+#set page(width: auto, height: auto, margin: 5mm)
+
+#heading("Hello World!")

util_test.go

@@ -1,3 +1,8 @@
+// Copyright (c) 2025 David Vogel
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
 package typst
 
 import (