first

Dockerfile

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+FROM alpine:latest
+
+# Switch to edge (for latest firefox)
+RUN sed -i -e 's/v[[:digit:]]\.[[:digit:]]/edge/g' /etc/apk/repositories
+RUN echo http://dl-cdn.alpinelinux.org/alpine/edge/testing >> /etc/apk/repositories
+RUN apk update && apk upgrade
+
+RUN apk add firefox-esr jq xvfb curl openjdk8-jre
+RUN rm -rf /var/cache/apk/*
+
+COPY geckodriver.sh geckodriver.sh
+RUN sh geckodriver.sh

README.md

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+# geckodriver-alpine
+Firefox and Geckodriver on Alpine edge

geckodriver.sh

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+#!/bin/sh
+json=$(curl -s https://api.github.com/repos/mozilla/geckodriver/releases/latest)
+os=$(uname -s)
+arch=$(uname -m)
+if [ $os = "Linux" ] ; then
+    case "$arch" in
+        i386 | i486 | i786 | x86)
+            url=$(echo "$json" | jq -r '.assets[].browser_download_url | select(contains("linux32"))')
+            ;;        
+        x86_64 | x86-64 | x64 | amd64)
+            url=$(echo "$json" | jq -r '.assets[].browser_download_url | select(contains("linux64"))')
+            ;;
+        xscale | arm | armv61 | armv71 | armv81 | aarch64)
+            url=$(echo "$json" | jq -r '.assets[].browser_download_url | select(contains("arm7hf"))')
+            ;;
+        *)
+            echo Architecture not supported: $arch
+            exit 1
+            ;;
+    esac
+elif [ $os = "Darwin" ] ; then
+    url=$(echo "$json" | jq -r '.assets[].browser_download_url | select(contains("macos"))')
+fi
+
+if [ -z $url ] ; then
+    echo OS not supported: $os
+    exit 1
+fi
+
+echo $url
+
+curl -s -L "$url" | tar -xz
+chmod +x geckodriver
+mv geckodriver /usr/bin