Initial code drop (#1)

* Initial code drop

* Added readme and .travis.yml

* Made docker org an env var.

* added a deploy phase

* Adjusted deploy phase

.travis.yml

@@ -0,0 +1,8 @@
+language: bash
+os:
+- linux
+services:
+- docker
+deploy:
+  provider: script
+  script: bash ./docker-build.sh

Dockerfile

@@ -0,0 +1,6 @@
+FROM gcr.io/cloud-builders/docker
+RUN apt-get update && \
+      apt-get -y install sudo jq wget
+RUN wget https://github.com/appsody/appsody/releases/download/0.2.2/appsody_0.2.2_amd64.deb
+COPY setupAndRunExtract.sh .
+RUN apt install -f ./appsody_0.2.2_amd64.deb

README.md

@@ -1,2 +1,20 @@
-# appsody-docker
-A docker image with Appsody CLI installed. Useful for running Appsody in Tekton pipelines.
+# Appsody in Docker
+
+A builder for the `appsody/appsody-docker` Docker image, which is the `gcr.io/cloud-builders/docker` image with the Appsody CLI added to it. The image can be used within a build pipeline - such as a Tekton pipeline - to perform actions using the Appsody CLI.
+
+At present, the image is equipped with a script (`setupAndRunExtract.sh`) that runs the `appsody extract` command, after mounting the appropriate project source directory. The script assumes that the image is running within a Docker container in a Tekton pipeline. It discovers the `/workspace` mount point, and retrieves the host's directory corresponding to that mount. It then gives that mount point to the Appsody CLI in the `APPSODY_MOUNT_PROJECT` environment variable. This type of retrieval is necessary because the Appsody CLI runs in Docker within a Docker image.
+
+### Building the image
+This repo includes a `.travis.yml` file that builds and pushes the image to Docker Hub. However, if you prefer building the image manually, issue the following command:
+
+```sh
+docker build -t appsody-docker -f Dockerfile .
+```
+
+### Using the image
+An example of usage is provided by the [Appsody Tekton pipeline example](https://github.com/appsody/tekton-example). Check out the [Appsody build task](https://github.com/appsody/tekton-example/blob/master/appsody-build-task.yaml) manifest. 
+
+In that context, the image runs the `appsody extract` command to retrieve the entire project tree from the Appsody stack image and the application source tree hosted on GitHub.
+
+This image could be modified to run additional `appsody` commands if necessary.
+

docker-build.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
+docker build -t $DOCKER_ORG/appsody-docker .
+docker push $DOCKER_ORG/appsody-docker

setupAndRunExtract.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+set -e
+# inspecting the container to find the mounts
+containerid=`docker ps|grep appsody-docker|awk '{print $1}'`
+dockerinspect=`docker inspect ${containerid}`
+# checking the mounts to extract the workspace mount
+notdone=true
+found=false
+idx=0
+while [ "$notdone" = true ]; do
+  dest=`echo ${dockerinspect}|jq --argjson index $idx '.[] | .Mounts[$index].Destination '`
+  echo $dest
+  if [ "$dest" = "\"/workspace\"" ] ; then
+     source=`echo ${dockerinspect}|jq --argjson index $idx '.[] | .Mounts[$index].Source '`
+     found=true
+     notdone=false
+  elif [ "$dest" == null ]; then
+     notdone=false
+  fi
+  idx=$[$idx+1]
+
+done
+if [ ! "$found" = true ] ; then
+  echo Could not find a workspace mount - something is wrong
+  exit 1
+else
+  echo Source mount is ${source}
+# Removing the quotes
+  source="${source%\"}"
+  source="${source#\"}"
+fi
+# Appending appsody-source
+  postfix="/appsody-source"
+  source=$source$postfix
+export APPSODY_MOUNT_PROJECT=${source}
+echo APPSODY_MOUNT_PROJECT=${APPSODY_MOUNT_PROJECT}
+# Create the /extracted sub-dir
+mkdir /workspace/extracted
+# Run appsody extract -v from the source directory
+cd /workspace/appsody-source
+ls -latr
+appsody extract -v
+# Copy the extracted contents to /workspace/extracted
+cp -rf /builder/home/.appsody/extract/appsody-source/* /workspace/extracted/
+ls -latr /workspace/extracted
+