nico/kobopatch-webui
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WIP: working patcher?

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This commit is contained in:
Nico Verbruggen
2026-03-15 22:27:59 +01:00
parent 2ce1772611
commit d7622e5e05
15 changed files with 1363 additions and 337 deletions
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10
kobopatch-wasm/build.sh
View File

@@ -8,10 +8,16 @@ if [ ! -d "$SCRIPT_DIR/kobopatch-src" ]; then
exit 1
fi
PUBLIC_DIR="$SCRIPT_DIR/../src/public"
echo "Building kobopatch WASM..."
cd "$SCRIPT_DIR"
GOOS=js GOARCH=wasm go build -o kobopatch.wasm .
echo "WASM binary size: $(du -h kobopatch.wasm | cut -f1)"
echo ""
echo "Output: $SCRIPT_DIR/kobopatch.wasm"
echo "Copying artifacts to $PUBLIC_DIR..."
cp kobopatch.wasm "$PUBLIC_DIR/kobopatch.wasm"
cp wasm_exec.js "$PUBLIC_DIR/wasm_exec.js"
echo "Done."

26
kobopatch-wasm/main.go
View File

@@ -53,6 +53,7 @@ func main() {
// args[0]: configYAML (string) - the kobopatch.yaml config content
// args[1]: firmwareZip (Uint8Array) - the firmware zip file bytes
// args[2]: patchFiles (Object) - map of filename -> Uint8Array patch file contents
// args[3]: onProgress (Function, optional) - callback(message string) for progress updates
//
// Returns: a Promise that resolves to { tgz: Uint8Array, log: string } or rejects with an error.
func jsPatchFirmware(this js.Value, args []js.Value) interface{} {
@@ -107,17 +108,31 @@ func runPatch(args []js.Value) (*patchResult, error) {
patchFiles[key] = buf
}
return patchFirmware([]byte(configYAML), firmwareZip, patchFiles)
// Optional progress callback.
var progressFn func(string)
if len(args) >= 4 && args[3].Type() == js.TypeFunction {
cb := args[3]
progressFn = func(msg string) {
cb.Invoke(msg)
}
}
return patchFirmware([]byte(configYAML), firmwareZip, patchFiles, progressFn)
}
// patchFirmware runs the kobopatch patching pipeline entirely in memory.
func patchFirmware(configYAML []byte, firmwareZip []byte, patchFileContents map[string][]byte) (*patchResult, error) {
func patchFirmware(configYAML []byte, firmwareZip []byte, patchFileContents map[string][]byte, progressFn func(string)) (*patchResult, error) {
var logBuf bytes.Buffer
logf := func(format string, a ...interface{}) {
fmt.Fprintf(&logBuf, format+"\n", a...)
msg := fmt.Sprintf(format, a...)
logBuf.WriteString(msg + "\n")
if progressFn != nil {
progressFn(msg)
}
}
// Parse config.
logf("Parsing config...")
var config Config
dec := yaml.NewDecoder(bytes.NewReader(configYAML))
if err := dec.Decode(&config); err != nil {
@@ -128,16 +143,17 @@ func patchFirmware(configYAML []byte, firmwareZip []byte, patchFileContents map[
return nil, errors.New("invalid config: version and patches are required")
}
logf("kobopatch wasm")
logf("Firmware version: %s", config.Version)
// Open the firmware zip from memory.
logf("Opening firmware zip (%d MB)...", len(firmwareZip)/1024/1024)
zipReader, err := zip.NewReader(bytes.NewReader(firmwareZip), int64(len(firmwareZip)))
if err != nil {
return nil, fmt.Errorf("could not open firmware zip: %w", err)
}
// Find and extract KoboRoot.tgz from the zip.
logf("Extracting KoboRoot.tgz from firmware...")
var koboRootTgz io.ReadCloser
for _, f := range zipReader.File {
if f.Name == "KoboRoot.tgz" {
@@ -285,7 +301,7 @@ func patchFirmware(configYAML []byte, firmwareZip []byte, patchFileContents map[
}
// Verify consistency.
logf("\nVerifying output KoboRoot.tgz...")
logf("Verifying output KoboRoot.tgz...")
verifyReader, err := gzip.NewReader(bytes.NewReader(outBuf.Bytes()))
if err != nil {
return nil, fmt.Errorf("could not verify output: %w", err)