build: try to consolidate instructions and decr codedupe in release.sh

contrib/android/build.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+#
+# env vars:
+# - ELECBUILD_NOCACHE: if set, forces rebuild of docker image
+# - ELECBUILD_COMMIT: if set, do a fresh clone and git checkout
+
+set -e
+
+PROJECT_ROOT="$(dirname "$(readlink -e "$0")")/../.."
+PROJECT_ROOT_OR_FRESHCLONE_ROOT="$PROJECT_ROOT"
+CONTRIB="$PROJECT_ROOT/contrib"
+CONTRIB_ANDROID="$CONTRIB/android"
+DISTDIR="$PROJECT_ROOT/dist"
+
+. "$CONTRIB"/build_tools_util.sh
+
+
+DOCKER_BUILD_FLAGS=""
+if [ ! -z "$ELECBUILD_NOCACHE" ] ; then
+    info "ELECBUILD_NOCACHE is set. forcing rebuild of docker image."
+    DOCKER_BUILD_FLAGS="--pull --no-cache"
+fi
+
+info "building docker image."
+cp "$CONTRIB/deterministic-build/requirements-build-android.txt" "$CONTRIB_ANDROID/requirements-build-android.txt"
+sudo docker build \
+    $DOCKER_BUILD_FLAGS \
+    -t electrum-android-builder-img \
+    "$CONTRIB_ANDROID"
+rm "$CONTRIB_ANDROID/requirements-build-android.txt"
+
+
+# maybe do fresh clone
+if [ ! -z "$ELECBUILD_COMMIT" ] ; then
+    info "ELECBUILD_COMMIT=$ELECBUILD_COMMIT. doing fresh clone and git checkout."
+    FRESH_CLONE="$CONTRIB_ANDROID/fresh_clone/electrum" && \
+        sudo rm -rf "$FRESH_CLONE" && \
+        umask 0022 && \
+        git clone "$PROJECT_ROOT" "$FRESH_CLONE" && \
+        cd "$FRESH_CLONE"
+    git checkout "$ELECBUILD_COMMIT"
+    PROJECT_ROOT_OR_FRESHCLONE_ROOT="$FRESH_CLONE"
+else
+    info "not doing fresh clone."
+fi
+
+DOCKER_RUN_FLAGS=""
+if [[ -n "$1"  && "$1" == "release" ]] ; then
+    info "'release' mode selected. mounting ~/.keystore inside container."
+    DOCKER_RUN_FLAGS="-v $HOME/.keystore:/home/user/.keystore"
+fi
+
+info "building binary..."
+mkdir --parents "$PROJECT_ROOT_OR_FRESHCLONE_ROOT"/.buildozer/.gradle
+sudo docker run -it --rm \
+    --name electrum-android-builder-cont \
+    -v "$PROJECT_ROOT_OR_FRESHCLONE_ROOT":/home/user/wspace/electrum \
+    -v "$PROJECT_ROOT_OR_FRESHCLONE_ROOT"/.buildozer/.gradle:/home/user/.gradle \
+    $DOCKER_RUN_FLAGS \
+    --workdir /home/user/wspace/electrum \
+    electrum-android-builder-img \
+    ./contrib/android/make_apk "$@"
+
+# make sure resulting binary location is independent of fresh_clone
+if [ ! -z "$ELECBUILD_COMMIT" ] ; then
+    mkdir --parents "$DISTDIR/"
+    sudo cp -f "$FRESH_CLONE/dist"/* "$DISTDIR/"
+fi