Add Docker support and upgrade failing sharp

.dockerignore

@@ -0,0 +1 @@
+node_modules

.nvmrc

@@ -0,0 +1 @@
+17.3.0

Dockerfile

@@ -0,0 +1,41 @@
+FROM ubuntu:18.04
+
+RUN apt-get update
+RUN DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt-get -y install tzdata
+RUN apt-get install build-essential wget pkg-config xvfb libxi-dev libglu1-mesa-dev libglew-dev libvips-dev -y --no-install-recommends
+
+# install ffmpeg
+RUN wget --no-check-certificate -O /tmp/ffmpeg.tar.xz \
+  "https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-$(dpkg --print-architecture)-static.tar.xz" \
+  && mkdir /usr/local/ffmpeg && cd /usr/local/ffmpeg && tar xvf /tmp/ffmpeg.tar.xz --strip-components=1
+ENV PATH=/usr/local/ffmpeg:$PATH
+
+# upgrade vips
+ARG VIPS_VERSION="8.12.1"
+RUN cd /tmp && wget --no-check-certificate \
+  "https://github.com/libvips/libvips/releases/download/v$VIPS_VERSION/vips-$VIPS_VERSION.tar.gz" && \
+  tar zxvf vips* && cd vips-$VIPS_VERSION && ./configure && make && make install && ldconfig
+ENV LD_LIBRARY_PATH=/usr/local/lib
+ENV PKG_CONFIG_PATH=/usr/local/lib/pkgconfig
+ENV GI_TYPELIB_PATH=/usr/lib/$(arch)-linux-gnu/girepository-1.0:/usr/lib/girepository-1.0
+
+# install nodejs
+WORKDIR /app
+ADD .nvmrc /app/.nvmrc
+RUN wget --no-check-certificate \
+  "https://nodejs.org/dist/v$(cat .nvmrc)/node-v$(cat .nvmrc)-linux-$( \
+    [ $(dpkg --print-architecture) = amd64 ] && echo x64 || dpkg --print-architecture).tar.gz" \
+  -O /tmp/node.tar.gz \
+  && tar -xf /tmp/node.tar.gz -C /usr/local --strip-components=1 \
+  && rm /tmp/node.tar.gz
+
+ADD package*.json /app
+RUN npm install
+
+ADD *.js *.sh /app/
+ADD lib /app/lib
+ADD media /app/media
+
+RUN ln -s /app/lib/cli.js /usr/local/bin/ffmpeg-concat
+
+ENTRYPOINT ["/app/docker-entrypoint.sh"]

docker-entrypoint.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+CMD_PREPEND="ffmpeg-concat"
+PATTERN="^\s*(npm|npx|node|ffmpeg|sh|bash).*$"
+if [[ $# == 0 ]]; then
+    CMD_PREPEND="ffmpeg-concat --help"
+elif [[ "$1" =~ $PATTERN ]]; then
+    CMD_PREPEND=""
+fi
+
+echo Running: exec xvfb-run -s "-ac -screen 0 1280x1024x24" \
+    $CMD_PREPEND "$@"
+exec xvfb-run -s "-ac -screen 0 1280x1024x24" \
+    $CMD_PREPEND "$@"

package.json

@@ -13,7 +13,10 @@
     "node": ">=10.13.0"
   },
   "scripts": {
-    "test": "ava -v && standard"
+    "test": "ava -v && standard",
+    "docker-build": "docker build . -t ffmpeg-concat",
+    "docker-test": "docker build . -t ffmpeg-concat && docker run --init ffmpeg-concat npm run test",
+    "docker": "docker run --init -v \"${DIR:-$(pwd)}:/vids\" -w /vids ffmpeg-concat"
   },
   "keywords": [
     "ffmpeg",
@@ -47,7 +50,7 @@
     "p-map": "^2.0.0",
     "p-race": "^2.0.0",
     "rmfr": "^2.0.0",
-    "sharp": "^0.24.0",
+    "sharp": "^0.29.3",
     "tempy": "^0.2.1",
     "url-parse": "^1.4.4"
   },

readme.md

@@ -35,6 +35,30 @@ This package runs on Linux, macOS, and Windows.
 
 Node.js versions 10.13.0 and up are supported. Note (**macOS only**): due to an inadvertant low-level breaking change in libuv's process handling code, OpenGL [is not supported](https://github.com/stackgl/headless-gl#supported-platforms-and-nodejs-versions) when running Node.js version 12.13.1 through to 13.6.0 on macOS. A fix has been released in Node.js version 13.7.0. A fix for 12.x is pending. Other platforms are unaffected.
 
+### Docker
+
+A multi-platform and multi-arch Docker image can be used for debugging and cross platform needs (requires [Docker](https://www.docker.com/) installed), as well as avoiding requiring `ffmpeg` and node dependencies installed locally.
+
+Docker image build:
+```bash
+npm run docker-build
+```
+
+After image is built, some `docker run` examples:
+```bash
+# run tests in docker container
+npm run docker-test
+# print CLI options
+npm run docker
+npm run docker -- --help
+# run on this repo's sample files in container
+npm run docker -- media/0.mp4 media/1.mp4
+# run with host machine files (make sure Docker has access / permissions)
+DIR=/path/to/vids/dir npm run docker -- file1.mov file2.avi
+```
+
+See [package.json](./package.json), and [Dockerfile](./Dockerfile) for more details.
+
 ## CLI
 
 ```sh