Initial CI setup test

Added code coverage report generation (for future CI stuff)
Fixed a flaky unit test

scripts/drone-static-upload.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+
+# Script used with Drone CI to upload build artifacts (because specifying all this in
+# .drone.jsonnet is too painful).
+
+set -o errexit
+
+if [ -z "$SSH_KEY" ]; then
+    echo -e "\n\n\n\e[31;1mUnable to upload artifact: SSH_KEY not set\e[0m"
+    # Just warn but don't fail, so that this doesn't trigger a build failure for untrusted builds
+    exit 0
+fi
+
+echo "$SSH_KEY" >ssh_key
+
+set -o xtrace  # Don't start tracing until *after* we write the ssh key
+
+chmod 600 ssh_key
+
+# Define the output paths
+build_dir="app/build/outputs/apk/play/debug"
+target_path=$(ls ${build_dir} | grep -o 'session-[^[:space:]]*-universal.apk')
+
+# Validate the paths exist
+if [ ! -d $build_path ]; then
+    echo -e "\n\n\n\e[31;1mExpected a file to upload, found none\e[0m" >&2
+    exit 1
+fi
+
+if [ -n "$DRONE_TAG" ]; then
+    # For a tag build use something like `session-android-v1.2.3-universal`
+    base="session-android-$DRONE_TAG-universal"
+else
+    # Otherwise build a length name from the datetime and commit hash, such as:
+    # session-android-20200522T212342Z-04d7dcc54-universal
+    base="session-android-$(date --date=@$DRONE_BUILD_CREATED +%Y%m%dT%H%M%SZ)-${DRONE_COMMIT:0:9}-universal"
+fi
+
+# Copy over the build products
+mkdir -vp "$base"
+cp -av $target_path "$base"
+
+# tar dat shiz up yo
+archive="$base.tar.xz"
+tar cJvf "$archive" "$base"
+
+upload_to="oxen.rocks/${DRONE_REPO// /_}/${DRONE_BRANCH// /_}"
+
+# sftp doesn't have any equivalent to mkdir -p, so we have to split the above up into a chain of
+# -mkdir a/, -mkdir a/b/, -mkdir a/b/c/, ... commands.  The leading `-` allows the command to fail
+# without error.
+upload_dirs=(${upload_to//\// })
+put_debug=
+mkdirs=
+dir_tmp=""
+for p in "${upload_dirs[@]}"; do
+    dir_tmp="$dir_tmp$p/"
+    mkdirs="$mkdirs
+-mkdir $dir_tmp"
+done
+
+sftp -i ssh_key -b - -o StrictHostKeyChecking=off drone@oxen.rocks <<SFTP
+$mkdirs
+put $archive $upload_to
+$put_debug
+SFTP
+
+set +o xtrace
+
+echo -e "\n\n\n\n\e[32;1mUploaded to https://${upload_to}/${archive}\e[0m\n\n\n"

scripts/drone-upload-exists.sh

@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+#
+# Script used with Drone CI to check for the existence of a build artifact.
+
+if [[ -z ${DRONE_REPO} || -z ${DRONE_PULL_REQUEST} ]]; then
+	echo -e "\n\n\n\n\e[31;1mRequired env variables not specified, likely a tag build so just failing\e[0m\n\n\n"
+	exit 1
+fi
+
+# This file info MUST match the structure of `base` in the `drone-static-upload.sh` script in
+# order to function correctly
+prefix="session-android-"
+suffix="-${DRONE_COMMIT:0:9}-universal.tar.xz"
+
+# Extracting head.label using string manipulation
+echo "Extracting repo information for 'https://api.github.com/repos/${DRONE_REPO}/pulls/${DRONE_PULL_REQUEST}'"
+pr_info=$(curl -s https://api.github.com/repos/${DRONE_REPO}/pulls/${DRONE_PULL_REQUEST})
+pr_info_clean=$(echo "$pr_info" | tr -d '[:space:]')
+head_info=$(echo "$pr_info_clean" | sed -n 's/.*"head"\(.*\)"base".*/\1/p')
+fork_repo=$(echo "$head_info" | grep -o '"full_name":"[^"]*' | sed 's/"full_name":"//')
+fork_branch=$(echo "$head_info" | grep -o '"ref":"[^"]*' | sed 's/"ref":"//')
+upload_dir="https://oxen.rocks/${fork_repo}/${fork_branch}"
+
+echo "Starting to poll ${upload_dir} every 10s to check for a build matching '${prefix}.*${suffix}'"
+
+# Loop indefinitely the CI can timeout the script if it takes too long
+total_poll_duration=0
+max_poll_duration=$((30 * 60))	# Poll for a maximum of 30 mins
+
+while true; do
+	# Need to add the trailing '/' or else we get a '301' response
+	build_artifacts_html=$(curl -s "${upload_dir}/")
+
+	if [ $? != 0 ]; then
+		echo "Failed to retrieve build artifact list"
+		exit 1
+	fi
+
+	# Extract 'session-ios...' titles using grep and awk
+	current_build_artifacts=$(echo "$build_artifacts_html" | grep -o 'href="${prefix}[^"]*' | sed 's/href="//')
+
+	# Use grep to check for the combination
+	target_file=$(echo "$current_build_artifacts" | grep -o "${prefix}.*${suffix}" | tail -n 1)
+
+	if [ -n "$target_file" ]; then
+		echo -e "\n\n\n\n\e[32;1mExisting build artifact at ${upload_dir}/${target_file}\e[0m\n\n\n"
+	    exit 0
+	fi
+
+	# Sleep for 10 seconds before checking again
+	sleep 10
+	total_poll_duration=$((total_poll_duration + 10))
+
+	if [ $total_poll_duration -gt $max_poll_duration ]; then
+		echo -e "\n\n\n\n\e[31;1mCould not find existing build artifact after polling for 30 minutes\e[0m\n\n\n"
+		exit 1
+	fi
+done