Ruby example with MD5 checker over file system

Table of Contents

1. Install Ruby SDK 2.6.5
- 1.1. Install native Ruby SDK on your system
- 1.2. Install Ruby SDK in IntelliJ IDEA
2. CLI Ruby application
3. Build the Docker image and run the container with CLI application
4. Build the Maven project and execute the tests

1. Install Ruby SDK 2.6.5

1.1. Install native Ruby SDK on your system

Download the native SDK and install it on your system.

1.2. Install Ruby SDK in IntelliJ IDEA

Follow the reference guide and install the Ruby plugin for IDEA.

2. CLI Ruby application

The asset files are located in src/test/ruby/assets for testing purposes. The file a.txt is duplicated and b.txt appears twice with different content.

Run the commandline application as follows

$ ruby src/main/ruby/checksums/PrintDeepFilestructuresMD5.rb *\.txt

Found (2) files with the same MD5: 60b725f10c9c85c70d97880dfe8191b3:
C:/vcs/github/tibor17/maven-ruby-docker-example/src/test/ruby/assets/a.txt
C:/vcs/github/tibor17/maven-ruby-docker-example/src/test/ruby/assets/subdir/a.txt

a.txt
    MD5: 60b725f10c9c85c70d97880dfe8191b3
    MD5: 60b725f10c9c85c70d97880dfe8191b3

b.txt
    MD5: ba1f2511fc30423bdbb183fe33f3dd0f
    MD5: c0710d6b4f15dfa88f600b0e6b624077

You can specify the directory with custom asset directory and the file name pattern as follows:

$ ruby src/main/ruby/checksums/PrintDeepFilestructuresMD5.rb /path/to/asset/dir *\.txt

3. Build the Docker image and run the container with CLI application

$ docker build -t tibor17/ruby-md5 .

Sending build context to Docker daemon  180.7kB
Step 1/7 : FROM ruby:2-slim
 ---> 60bc28d65d84
Step 2/7 : ARG USER_HOME_DIR="/root"
 ---> Using cache
 ---> 42ed6006c318
Step 3/7 : LABEL maintainer="Tibor Digaňa"
 ---> Using cache
 ---> 1c62656c7e5d
Step 4/7 : WORKDIR ${USER_HOME_DIR:-/root}
 ---> Using cache
 ---> ab783801025d
Step 5/7 : ADD . .
 ---> c5f2f84ee903
Step 6/7 : ENTRYPOINT ["/bin/sh", "-c"]
 ---> Running in a1a1bed1caad
Removing intermediate container a1a1bed1caad
 ---> 6cde3fac3530
Step 7/7 : CMD ["ruby -v /root/src/main/ruby/checksums/PrintDeepFilestructuresMD5.rb /root/src/test/ruby/assets *\\.txt"]
 ---> Running in dde4ca524ec1
Removing intermediate container dde4ca524ec1
 ---> a453b510ba9c
Successfully built a453b510ba9c
Successfully tagged tibor17/ruby-md5:latest

$ docker run -it --rm tibor17/ruby-md5:latest
ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-linux]

Found (2) files with the same MD5: 60b725f10c9c85c70d97880dfe8191b3:
/root/src/test/ruby/assets/a.txt
/root/src/test/ruby/assets/subdir/a.txt

a.txt
    MD5: 60b725f10c9c85c70d97880dfe8191b3
    MD5: 60b725f10c9c85c70d97880dfe8191b3

b.txt
    MD5: ba1f2511fc30423bdbb183fe33f3dd0f
    MD5: c0710d6b4f15dfa88f600b0e6b624077

4. Build the Maven project and execute the tests

See the GitHub CI or simply run mvn test.

See the integration tests in https://github.com/torquebox/jruby-maven-plugins for more information.

[INFO] --- maven-surefire-plugin:3.0.0-M4:test (default-test) @ maven-ruby-docker-example ---
[INFO]
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running checksums.PrintDeepFilestructuresMD5Test
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3.211 s - in checksums.PrintDeepFilestructuresMD5Test
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0