Merge pull request #87 from samueldr-wip/feature/installer-script

Add installer script to android device output

devices/xiaomi-lavender/default.nix

@@ -43,6 +43,9 @@
 
     # This device adds skip_initramfs to cmdline for normal boots
     boot_as_recovery = true;
+    # Though this device has "boot_as_recovery", it still has a classic
+    # recovery partition for recovery. Go figure.
+    has_recovery_partition = true;
 
     vendor_partition = "/dev/disk/by-partlabel/vendor";
     gadgetfs.functions = {

modules/system-types/android.nix

@@ -1,6 +1,8 @@
 { config, pkgs, lib, modules, baseModules, ... }:
 
 let
+  inherit (lib) optionalString;
+
   # In the future, this pattern should be extracted.
   # We're basically subclassing the main config, just like nesting does in
   # NixOS (<nixpkgs/modules/system/activation/top-level.nix>)
@@ -15,6 +17,22 @@ let
     }];
   }).config;
 
+  withRecovery = let
+    inherit (device_config) info;
+    withBootAsRecovery = if info ? boot_as_recovery then info.boot_as_recovery else false;
+  in
+    # As defined... Some devices will have a discrete recovery partition even
+    # if the system is "boot as recovery".
+    if info ? has_recovery_partition
+    then info.has_recovery_partition
+    # Defaults: with 'boot as recovery' → no recovery ; without 'boot as recovery' → with recovery
+    else !withBootAsRecovery
+  ;
+
+  withAB = let inherit (device_config) info; in
+    if info ? ab_partitions then info.ab_partitions else false
+  ;
+
   device_config = config.mobile.device;
   device_name = device_config.name;
   enabled = config.mobile.system.type == "android";
@@ -32,11 +50,30 @@ let
     initrd = config.system.build.initrd;
   };
 
+  # Note:
+  # The flash scripts, by design, are not using nix-provided paths for
+  # either of fastboot or the outputs.
+  # This is because this output should have no refs. A simple tarball of this
+  # output should be usable even on systems without Nix.
+  # TODO: Embed device-specific fastboot instructions as `echo` in the script.
   android-device = pkgs.runCommandNoCC "android-device-${device_name}" {} ''
     mkdir -p $out
-    ln -s ${rootfs}/${rootfs.filename} $out/system.img
-    ln -s ${android-bootimg} $out/boot.img
-    ln -s ${android-recovery} $out/recovery.img
+    cp -v ${rootfs}/${rootfs.filename} $out/system.img
+    cp -v ${android-bootimg} $out/boot.img
+    ${optionalString withRecovery ''
+    cp -v ${android-recovery} $out/recovery.img
+    ''}
+    cat > $out/flash-critical.sh <<'EOF'
+    #!/usr/bin/env bash
+    dir="$(cd "$(dirname "''${BASH_SOURCE[0]}")"; echo "$PWD")"
+    PS4=" $ "
+    set -x
+    fastboot flash ${optionalString withAB "--slot=all"} boot "$dir"/boot.img
+    ${optionalString withRecovery ''
+    fastboot flash ${optionalString withAB "--slot=all"} recovery "$dir"/recovery.img
+    ''}
+    EOF
+    chmod +x $out/flash-critical.sh
   '';
 in
 {