Pinned Storefront installer for jailbroken Kindle KOReader

install-storefront.sh

#!/bin/sh
# Install the pinned Storefront release into KOReader on a jailbroken Kindle.
# Run this script as the Kindle user, not as root.
set -eu

VERSION=${STOREFRONT_VERSION:-26.8.18.2}
KINDLE_ROOT=${KINDLE_ROOT:-/mnt/us}
PLUGINS_DIR="$KINDLE_ROOT/koreader/plugins"
TMP_ROOT=${TMPDIR:-/tmp}
WORK_DIR="$TMP_ROOT/storefront-install.$$"
ZIP_FILE="$TMP_ROOT/storefront.koplugin.$$.zip"
STAGING_DIR="$PLUGINS_DIR/.storefront.koplugin.new.$$"
DEST_DIR="$PLUGINS_DIR/storefront.koplugin"
BACKUP_DIR="$PLUGINS_DIR/.storefront.koplugin.backup.$$"
URL="https://github.com/ultimatejimmy/storefront.koplugin/releases/download/$VERSION/storefront.koplugin.zip"
BACKUP_ACTIVE=0

fail() {
    echo "Storefront installation failed: $*" >&2
    exit 1
}

cleanup() {
    status=$?

    # If replacement was interrupted, put the previous plugin back.
    if [ "$BACKUP_ACTIVE" -eq 1 ] && [ ! -e "$DEST_DIR" ] && [ -e "$BACKUP_DIR" ]; then
        mv "$BACKUP_DIR" "$DEST_DIR" || echo "Warning: restore failed: $DEST_DIR" >&2
    fi

    rm -rf "$WORK_DIR" "$ZIP_FILE" "$STAGING_DIR"
    exit "$status"
}
trap cleanup 0 1 2 3 15

case "$VERSION" in
    ''|*[!A-Za-z0-9._-]*) fail "invalid STOREFRONT_VERSION: $VERSION" ;;
esac

command -v curl >/dev/null 2>&1 || fail "curl is required"
command -v unzip >/dev/null 2>&1 || fail "unzip is required"
[ -d "$KINDLE_ROOT" ] || fail "Kindle storage not found: $KINDLE_ROOT"
[ -d "$KINDLE_ROOT/koreader" ] || fail "KOReader not found: $KINDLE_ROOT/koreader"
[ -d "$PLUGINS_DIR" ] || fail "KOReader plugin directory not found: $PLUGINS_DIR"

rm -rf "$WORK_DIR" "$ZIP_FILE" "$STAGING_DIR" "$BACKUP_DIR"
mkdir -p "$WORK_DIR"

echo "Downloading Storefront $VERSION..."
curl -fL --retry 3 --retry-delay 2 -o "$ZIP_FILE" "$URL"
[ -s "$ZIP_FILE" ] || fail "downloaded archive is empty"

echo "Checking archive contents..."
unzip -q "$ZIP_FILE" -d "$WORK_DIR"

PLUGIN_COUNT=$(find "$WORK_DIR" -type d -name 'storefront.koplugin' | wc -l | tr -d ' ')
[ "$PLUGIN_COUNT" = 1 ] || fail "expected one storefront.koplugin directory, found $PLUGIN_COUNT"
PLUGIN_DIR=$(find "$WORK_DIR" -type d -name 'storefront.koplugin' | sed -n '1p')
[ -f "$PLUGIN_DIR/main.lua" ] || fail "archive does not contain storefront.koplugin/main.lua"

# Prepare the replacement outside the destination path so a failed copy leaves
# an existing installation untouched.
echo "Installing Storefront..."
cp -R "$PLUGIN_DIR" "$STAGING_DIR"
[ -f "$STAGING_DIR/main.lua" ] || fail "staged plugin is incomplete"

if [ -e "$DEST_DIR" ]; then
    mv "$DEST_DIR" "$BACKUP_DIR"
    BACKUP_ACTIVE=1
fi

if mv "$STAGING_DIR" "$DEST_DIR"; then
    BACKUP_ACTIVE=0
    rm -rf "$BACKUP_DIR"
else
    fail "could not activate the new plugin"
fi

sync
rm -rf "$WORK_DIR" "$ZIP_FILE"
echo "Storefront $VERSION installed. Restart KOReader, then open Tools > Storefront."