| 1 | /* -*-scala-*- |
| 2 | * |
| 3 | * Setting up the Android environment |
| 4 | * |
| 5 | * (c) 2018 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of the Trivial IP Encryption (TrIPE) Android app. |
| 11 | * |
| 12 | * TrIPE is free software: you can redistribute it and/or modify it under |
| 13 | * the terms of the GNU General Public License as published by the Free |
| 14 | * Software Foundation; either version 3 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | * |
| 17 | * TrIPE is distributed in the hope that it will be useful, but WITHOUT |
| 18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 20 | * for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with TrIPE. If not, see <https://www.gnu.org/licenses/>. |
| 24 | */ |
| 25 | |
| 26 | package uk.org.distorted.tripe; package object app { |
| 27 | |
| 28 | /*----- Imports -----------------------------------------------------------*/ |
| 29 | |
| 30 | import java.io.{File, IOException}; |
| 31 | |
| 32 | import scala.collection.mutable.HashMap; |
| 33 | |
| 34 | import android.content.Context; import Context.MODE_WORLD_READABLE; |
| 35 | import android.os.Build; import Build.{CPU_ABI, CPU_ABI2}; |
| 36 | import android.util.Log; |
| 37 | |
| 38 | import sys.FileImplicits._; |
| 39 | |
| 40 | /*----- Regular expressions for parsing the `.installed file --------------*/ |
| 41 | |
| 42 | private final val RX_COMMENT = """(?x) ^ \s* (?: \# .* )? $""".r; |
| 43 | private final val RX_KEYVAL = """(?x) ^ \s* |
| 44 | ([-\w]+) |
| 45 | (?:\s+(?!=)|\s*=\s*) |
| 46 | (|\S|\S.*\S) |
| 47 | \s* $""".r; |
| 48 | |
| 49 | /*----- Main code ---------------------------------------------------------*/ |
| 50 | |
| 51 | private final val TAG = "TrIPE"; |
| 52 | |
| 53 | var root: File = null; |
| 54 | |
| 55 | private def install(ctx: Context, inst: HashMap[String, String]) { |
| 56 | |
| 57 | /* First, figure out which ABIs are wanted on this device. Unfortunately, |
| 58 | * the good way of doing this isn't available in our minimum API level, so |
| 59 | * we must use reflection. |
| 60 | */ |
| 61 | val abis = try { |
| 62 | classOf[Build].getField("SUPPORTED_ABIS").get(null). |
| 63 | asInstanceOf[Array[String]] |
| 64 | } catch { case _: NoSuchFieldException => |
| 65 | Array(CPU_ABI, CPU_ABI2) flatMap { |
| 66 | case null | "" => None |
| 67 | case s => Some(s) |
| 68 | } |
| 69 | } |
| 70 | Log.d(TAG, s"abis = ${abis.mkString(", ")}"); |
| 71 | |
| 72 | /* Clear out whatever might be there already. */ |
| 73 | val bindir = root/"bin"; |
| 74 | bindir.rmTree(); |
| 75 | bindir.mkdir_!(); |
| 76 | |
| 77 | /* Now extract each of our binaries using the best available ABI. */ |
| 78 | val assets = ctx.getAssets; |
| 79 | for (abi <- abis) { |
| 80 | val binsrc = s"bin/$abi"; |
| 81 | for (base <- assets.list(binsrc)) { |
| 82 | val outfile = bindir/base; |
| 83 | if (!outfile.exists_!) { |
| 84 | Log.d(TAG, s"install: extract `$base' using abi `$abi'"); |
| 85 | outfile.withOutput { out => |
| 86 | closing(assets.open(s"$binsrc/$base")) { in => |
| 87 | for ((buf, n) <- blocks(in)) out.write(buf, 0, n); |
| 88 | } |
| 89 | } |
| 90 | } |
| 91 | outfile.chmod_!(0x1ed); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /* Write out a new install file. */ |
| 96 | val infofile = root/".installed"; |
| 97 | val newinfofile = root/".installed.new"; |
| 98 | newinfofile.withWriter { out => |
| 99 | out.write(s"""### -*-conf-*- |
| 100 | |
| 101 | uuid = ${ctx.getString(R.string.auto_build_uuid)} |
| 102 | """); |
| 103 | } |
| 104 | newinfofile.rename_!(infofile); |
| 105 | } |
| 106 | |
| 107 | def setup(ctx: Context) { |
| 108 | |
| 109 | /* Make our root directory and remember where it is. */ |
| 110 | root = ctx.getFilesDir; |
| 111 | if (!root.isdir_!) { |
| 112 | throw new IOException("system failed to create `files' " + |
| 113 | "(but didn't tell us)"); |
| 114 | } |
| 115 | |
| 116 | /* Find out which build, if any, corresponds to what's there already. */ |
| 117 | val inst = HashMap[String, String](); |
| 118 | try { root/".installed" withReader { in => |
| 119 | var lno = 1; |
| 120 | for (line <- lines(in)) { |
| 121 | line match { |
| 122 | case RX_COMMENT() => ok; |
| 123 | case RX_KEYVAL(k, v) => inst(k) = v; |
| 124 | case _ => Log.w(TAG, s".installed:$lno: ignored unparseable line"); |
| 125 | } |
| 126 | lno += 1; |
| 127 | } |
| 128 | } } catch { |
| 129 | case e: IOException => |
| 130 | Log.w(TAG, s".installed: I/O error: ${e.getMessage}"); |
| 131 | } |
| 132 | |
| 133 | /* If this doesn't match, then we have some work to do. */ |
| 134 | if (inst.getOrElse("uuid", "<nothing>") != |
| 135 | ctx.getString(R.string.auto_build_uuid)) |
| 136 | install(ctx, inst); |
| 137 | } |
| 138 | |
| 139 | /*----- That's all, folks -------------------------------------------------*/ |
| 140 | |
| 141 | } |