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+# Docker
+
+[![Docker](/doc/images/docker.jpg)](https://www.docker.com/)
+
+Docker related scripts and config files are under [CodeCompass/docker](/docker).
+After navigating to this directory you can use the build scripts with the
+commands below.
+
+:warning: When using Docker to build CodeCompass it is very important to have
+the following filesystem layout:
+
+```
+...
+ `-CodeCompass
+   |-CodeCompass   # Source code from Git.
+   | `-docker      # Docker related files.
+   |  `-dev        # Docker files for development.
+   |  `-web        # Docker files for deployment.  
+   |-build         # CMake runs here.
+   |-install       # CodeCompass goes here.
+   `-workspace     # Parsed projects' workspace directory.
+```
+
+The scripts assume this layout. The `build` and `install` directories will be
+generated to the parent directory of `CodeCompass` directory containing the
+source code. The `workspace` directory should be created manually.
+
+Table of Contents
+=================
+* [Development](#development)
+  * [Build image for development](#build-image-for-development)
+  * [How to use docker to develop CodeCompass](#how-to-use-docker-to-develop-codecompass)
+    * [Build, install and test CodeCompass](#build-install-and-test-codecompass)
+    * [Make a Postgresql container](#make-a-postgresql-container)
+    * [Create a network and connect CodeCompass and Postgres](#create-a-network-and-connect-codecompass-and-postgres)
+    * [Create a Postgres user](#create-a-postgres-user)
+    * [How to parse a project](#how-to-parse-a-project)
+    * [How to start a webserver](#how-to-start-a-webserver)
+* [Deployment](#deployment)
+  * [Build image for runtime](#build-image-for-runtime)
+  * [Build image for webserver](#build-image-for-webserver)
+    * [How to use the webserver executing container](#how-to-use-the-webserver-executing-container)
+* [Official DockerHub images](#official-dockerhub-images)
+
+# Development
+## Build image from development
+Build the development environment image. The tag name is important!
+**It is very important to give this command from the top level directory of the
+CodeCompass source.**
+
+```
+cd CodeCompass
+docker build -t codecompass:dev --file docker/dev/Dockerfile .
+```
+
+See more information [below](#how-to-use-docker-to-develop-codecompass) how to
+use this image to develop CodeCompass.
+
+## How to use docker to develop CodeCompass
+You can use the `codecompass:dev` image created
+[above](#build-image-for-development) to develop CodeCompass.
+First, you have to start a docker container from this image, which will mount
+your CodeCompass directory from your host and starts a shell:
+```bash
+docker run --rm -ti \
+  --env DATABASE=pgsql \
+  --env TEST_DB="postgresql://postgres:password@postgres_container:5432/postgres" \
+  --env BUILD_TYPE=Release \
+  --volume /path/to/host/CodeCompass:/CodeCompass \
+  --volume /path/to/your/host/project:/projects/myproject \
+  -p 8001:8080 \
+  codecompass:dev \
+  /bin/bash
+```
+This container will be used in the next subsections to build CodeCompass,
+parse a project and start a webserver.
+
+*Note*: you do not have to give the `--publish` option and set the `DATABASE`
+environment variable if you do not want to run a webserver. Also you do not
+have to mount a project directory if you do not want to parse it later.
+
+### Build, install and test CodeCompass
+You can use the `codecompass-build.sh` script inside the container to build,
+install and test CodeCompass:
+(If you get a timeout error when downloading, put this command before install: NODE_OPTIONS="--max-old-space-size=4096" NEXT_PRIVATE_BUILD_WORKER_TIMEOUT=600)
+```bash
+# Build CodeCompass.
+codecompass-build.sh -j8
+
+# Install CodeCompass.
+codecompass-build.sh install
+
+# Run tests.
+codecompass-build.sh test
+```
+
+### Make a Postgresql container
+You need to create a PostgreSQL container that CodeCompass can communicate with.
+(postgres is the image name and :15 is the specific version)
+```bash
+docker run \
+  --name postgres_container \
+  -e POSTGRES_PASSWORD=root_password \
+  -d \
+  -p 5432:5432 \
+  postgres:15
+```
+
+### Create a network and connect CodeCompass and Postgres
+Run the containers and connect them to a nework
+```bash
+docker network create my_network
+docker network connect my_network postgres_name
+docker network connect my_network codecompass_container
+```
+### Create a Postgres user
+You need to create a Postgres user and give it admin rights.
+(Run these commands from the host computer)
+```bash
+# Create user "your_user" with password "your_password" and give Superuser rights
+docker exec -it postgres_container psql -U postgres -d postgres -c "CREATE USER your_user WITH PASSWORD 'your_password' SUPERUSER;"
+```
+
+### How to parse a project
+You can parse a project inside a docker container by using the following
+command:
+(The project must be built before parsing.)
+```bash
+CodeCompass_parser \
+  -d "pgsql:database=myproject;host=codecompass-postgres;port=5432;user=your_user;password=your_password" \
+  -w /CodeCompass/workspace \
+  -n myproject \
+  -i /projects/myproject
+  -b /projects/myproject/projectname/bin/Debug \
+  -f
+```
+
+*Note*: the project directory should be mounted inside the container.
+
+### How to start a webserver
+You can start a webserver inside the container by using the following command:
+```bash
+# Run the web server.
+CodeCompass_webserver \
+  -w /CodeCompass/workspace
+```
+
+# Deployment
+
+## Build image for runtime
+For a production environment you can build and use the runtime environment image, 
+which contains the built CodeCompass binaries and their dependencies:
+```bash
+docker build -t codecompass:runtime --no-cache --file docker/runtime/Dockerfile .
+```
+
+By default this image download the `master` branch of the CodeCompass GitHub 
+repository and build it in `Release` mode with `sqlite` database configuration.
+You can override these default values through the following build-time
+variables:
+
+|       Variable       |                  Meaning                 |
+| -------------------- | ---------------------------------------- |
+| `CC_REPO_URL` | The URL of the CodeCompass repository to use. |
+| `CC_VERSION` |  The branch, version hash or tag of the CodeCompass repository to use. |
+| `CC_DATABASE`|  Database type. Possible values are **sqlite**, **pgsql**. |
+| `CC_BUILD_TYPE` | Specifies the build type. Supported values are **`Debug`** and **`Release`**. |
+
+The below example builds the `codecompass:runtime` image with *pgsql* configuration:
+```bash
+docker build -t codecompass:runtime --build-arg CC_DATABASE=pgsql \
+  --no-cache --file docker/runtime/Dockerfile .
+```
+
+*Note*: the `codecompass:dev` is a prerequisite to build the `codecompass:runtime` image.
+
+## Build image for webserver
+You can use the `codecompass:runtime` image created
+[above](#build-image-for-runtime) to build an executing container for the webserver:
+```bash
+docker build -t codecompass:web --no-cache --file docker/web/Dockerfile .
+```
+
+See more information [below](#how-to-run-codecompass-webserver-in-docker) how
+to use this image to start a CodeCompass webserver.
+
+### How to use the webserver executing container
+You can use the `codecompass:web` image to start a CodeCompass webserver.
+For this run the following command:
+```bash
+docker run \
+  --volume /path/to/host/workspace/:/workspace \
+  -p 8010:8080 \
+  codecompass:web \
+  CodeCompass_webserver -w /workspace
+```
+
+# Official DockerHub images
+
+Prebuilt images can be downloaded from DockerHub, from the 
+[modelcpp/codecompass](https://hub.docker.com/r/modelcpp/codecompass) 
+repository.
+
+The following image tags are available:
+
+| Name | Description |
+| ---- | ------------|
+| `dev` | Development image |
+| `runtime-sqlite` | Runtime image containing CodeCompass binaries built against SQLite |
+| `runtime-pgsql` | Runtime image containing CodeCompass binaries built against PostrgreSQL |
+| `web-sqlite` | Webserver executing container image built against SQLite |
+| `web-pgsql` | Webserver executing container image built against PostgreSQL |
+
+The default `latest` is an alias to `:runtime-pgsql`.
+To download (or update) an image from DockerHub, issue the command 
+`docker pull modelcpp/codecompass:latest`. (Replace `latest` with the desired tag.)