- integrate tmux

LICENSE.md

@@ -0,0 +1,4 @@
+Released under [the GPLv3 license](https://www.gnu.org/licenses/gpl.html).
+
+- Contains code from `termux-app` by which is released under GPLv3.
+- Contains binary from `code-server` by which is released under MIT License.

app/build.gradle

@@ -5,14 +5,21 @@ apply plugin: 'kotlin-android-extensions'
 android {
     compileSdkVersion 29
     buildToolsVersion "29.0.3"
+    ndkVersion '21.1.6352462'
 
     defaultConfig {
-        applicationId "vn.vhn.vhscode"
+        applicationId "vn.vhn.vsc"
         minSdkVersion 26
         targetSdkVersion 29
         versionCode 1
         versionName "1.0"
 
+        externalNativeBuild {
+            ndkBuild {
+                cFlags "-std=c11", "-Wall", "-Wextra", "-Werror", "-Os", "-fno-stack-protector", "-Wl,--gc-sections"
+            }
+        }
+
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
 
         ndk {
@@ -31,6 +38,12 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    externalNativeBuild {
+        ndkBuild {
+            path "src/main/cpp/Android.mk"
+        }
+    }
 }
 
 dependencies {
@@ -46,3 +59,65 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
 }
+
+def downloadBootstrap(String arch, String expectedChecksum, int version) {
+    def digest = java.security.MessageDigest.getInstance("SHA-256")
+
+    def localUrl = "src/main/cpp/bootstrap-" + arch + ".zip"
+    def file = new File(projectDir, localUrl)
+    if (file.exists()) {
+        def buffer = new byte[8192]
+        def input = new FileInputStream(file)
+        while (true) {
+            def readBytes = input.read(buffer)
+            if (readBytes < 0) break
+            digest.update(buffer, 0, readBytes)
+        }
+        def checksum = new BigInteger(1, digest.digest()).toString(16)
+        if (checksum == expectedChecksum) {
+            return
+        } else {
+            logger.quiet("Deleting old local file with wrong hash: " + localUrl)
+            file.delete()
+        }
+    }
+
+    def remoteUrl = "https://bintray.com/termux/bootstrap/download_file?file_path=bootstrap-" + arch + "-v" + version + ".zip"
+    logger.quiet("Downloading " + remoteUrl + " ...")
+
+    file.parentFile.mkdirs()
+    def out = new BufferedOutputStream(new FileOutputStream(file))
+
+    def connection = new URL(remoteUrl).openConnection()
+    connection.setInstanceFollowRedirects(true)
+    def digestStream = new java.security.DigestInputStream(connection.inputStream, digest)
+    out << digestStream
+    out.close()
+
+    def checksum = new BigInteger(1, digest.digest()).toString(16)
+    if (checksum != expectedChecksum) {
+        file.delete()
+        throw new GradleException("Wrong checksum for " + remoteUrl + ": expected: " + expectedChecksum + ", actual: " + checksum)
+    }
+}
+
+clean {
+    doLast {
+        def tree = fileTree(new File(projectDir, 'src/main/cpp'))
+        tree.include 'bootstrap-*.zip'
+        tree.each { it.delete() }
+    }
+}
+
+task downloadBootstraps(){
+    doLast {
+        def version = 22
+        downloadBootstrap("aarch64", "d00cd85b773202924e0256af25c521744fcfa845a1120ecffe685a4a0baf44d6", version)
+    }
+}
+
+afterEvaluate {
+    android.applicationVariants.all { variant ->
+        variant.javaCompileProvider.get().dependsOn(downloadBootstraps)
+    }
+}

app/src/main/cpp/Android.mk

@@ -0,0 +1,5 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+LOCAL_MODULE := libtermux-bootstrap
+LOCAL_SRC_FILES := termux-bootstrap-zip.S termux-bootstrap.c
+include $(BUILD_SHARED_LIBRARY)

app/src/main/cpp/termux-bootstrap-zip.S

@@ -0,0 +1,18 @@
+     .global blob
+     .global blob_size
+     .section .rodata
+ blob:
+ #if defined __i686__
+     .incbin "bootstrap-i686.zip"
+ #elif defined __x86_64__
+     .incbin "bootstrap-x86_64.zip"
+ #elif defined __aarch64__
+     .incbin "bootstrap-aarch64.zip"
+ #elif defined __arm__
+     .incbin "bootstrap-arm.zip"
+ #else
+ # error Unsupported arch
+ #endif
+ 1:
+ blob_size:
+     .int 1b - blob

app/src/main/cpp/termux-bootstrap.c

@@ -0,0 +1,11 @@
+#include <jni.h>
+
+extern jbyte blob[];
+extern int blob_size;
+
+JNIEXPORT jbyteArray JNICALL Java_com_termux_app_TermuxInstaller_getZip(JNIEnv *env, __attribute__((__unused__)) jobject This)
+{
+    jbyteArray ret = (*env)->NewByteArray(env, blob_size);
+    (*env)->SetByteArrayRegion(env, ret, 0, blob_size, blob);
+    return ret;
+}