Git-Gamble

TCRDD = TCR (test && commit || revert) + TDD (Test Driven Development)

Original idea by Xavier Detant

[[TOC]]

Theory

TCR

TCR is cool! It encourages doing baby steps, reducing the waste when we are wrong

But it doesn't allow us to see the tests failing

So:

• Maybe we test nothing (assert forgotten)

  python def test_should_be_Buzz_given_5(): input = 5 actual = fizz_buzz(input) # Oops! Assert has been forgotten

• Maybe we are testing something that is not the thing we should be testing

  typescript it("should be Fizz given 3", () => { const input = 3; const actual = fizzBuzz(input); expect(input).toBe("Fizz"); // Oops! Asserts on the input value instead of the actual value });

TDD

TDD is cool! It makes sure we develop the right thing, step by step

TCRDD

TCRDD = TCR + TDD

TCRDD blends the constraints of the two methods to benefit from their advantages

Therefore, TCRDD makes sure we develop the right thing, step by step, and we are encouraged to do so by baby steps, reducing the waste when we are wrong

```plantuml @startuml skinparam ArrowColor black

start repeat partition "red" #Coral { repeat :Write a test] :Gamble that the tests fail/ if (Actually run tests) then (Fail) -[#Red]-> :Commit; break else (Pass) -[#Green]-> :Revert; endif repeat while (Write another test) } partition "green" #Lime { repeat :Write the minimum code] :Gamble that the tests pass/ if (Actually run tests) then (Pass) -[#Green]-> :Commit; break else (Fail) -[#Red]-> :Revert; endif repeat while (Try something else) } partition "refactor" #668cff { repeat repeat :Write code without changing the behavior] :Gamble that the tests pass/ if (Actually run tests) then (Pass) -[#Green]-> :Commit; break else (Fail) -[#Tomato]-> :Revert; endif repeat while (Change something else) repeat while (Another things to refactor ?) } repeat while (Another feature to add ?) stop @enduml ```

How to install

Requirements

git-gamble doesn't repackage git, it use the one installed on your system

Install git

Be sure to make it available in your $PATH, you can check with this command

shell git --help

AppImage

1. Download the

   shell curl --location "https://dl.bintray.com/pinage404/git-gamble-AppImage/git-gamble-LATEST_VERSION-x86_64.AppImage" --output git-gamble.AppImage

2. Make it executable

   shell chmod +x git-gamble.AppImage

3. Put it your $PATH

   ```shell

   for example

   mkdir -p ~/.local/bin mv git-gamble.AppImage ~/.local/bin/git-gamble export PATH+=":~/.local/bin" ```

Debian

As root

1. It seems to be needed to be able to add a new repository

   shell apt update apt install \ ca-certificates \ gnupg

2. Add the git-gamble's GPG key (currently, it's Bintray GPG key)

   shell apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 379CE192D401AB61

3. Add git-gamble repository

   shell echo "deb https://dl.bintray.com/pinage404/git-gamble-debian bullseye main" | tee -a /etc/apt/sources.list apt update

4. Install git-gamble

   shell apt install git-gamble

Cargo

Install Cargo

shell cargo install git-gamble

Add ~/.cargo/bin to your $PATH

Fish:

fish set --export --append PATH ~/.cargo/bin

Bash / ZSH:

bash export PATH=$PATH:~/.cargo/bin

Check the installation

Check if all have been well settled

shell git gamble

If it has been well settled, it should output this :

error: The following required arguments were not provided:
    <test-command>...
    <--pass|--fail>

USAGE:
    git-gamble --repository-path <repository-path> <--pass|--fail>

For more information try --help

If it has been badly settled, it should output this :

git : 'gamble' is not a git command. See 'git --help'.

How to use

To see all available flags and options

shell git-gamble --help # dash is only needed for --help

1. Write a failing test in your codebase, then :

   shell git gamble --fail -- $YOUR_TEST_COMMAND

2. Write the minimum code to make tests pass, then :

   shell git gamble --pass -- $YOUR_TEST_COMMAND

3. Refactor your code, then :

   shell git gamble --pass -- $YOUR_TEST_COMMAND

It's a bit tedious to always repeat the test command

So you can set an environment variable with the test command to avoid repeating it all the time

shell export GAMBLE_TEST_COMMAND="sh -c 'cargo fix --allow-dirty ; cargo clippy --all-targets ; cargo check --all-targets ; cargo fmt ; cargo test'" git gamble --pass

Test command must exit with a 0 status when there are 0 failing tests, anything else is considered as a failure

Backlog

plantuml @startmindmap "backlog" * Backlog left side * Done * MVP * base * run tests * `git commit` * `git revert` * test it * TCR * option --pass * TRC * option --fail * give path in option * improve test command * test command with arguments * script * dry run flag * help option * -h * --help * exclusive flag * required flag * option colors * -g * --green * -r * --red * merge commits * `git update-ref` * `git commit --amend` * should fail without test command * test command from envirronement variable * display when committed or reverted * how to use * test in isolated and reproductible envirronement * container * CI * [[https://doc.rust-lang.org/cargo/guide/continuous-integration.html Cargo's Documentation about CI]] * complete metadata * rename project? * simpler to say and understand and remember when not familiar with `TCR` or `TDD` * from `git-tcrdd` to `git-...`? * [[https://www.wordreference.com/fren/jouer jouer?]] * [[https://www.wordreference.com/fren/parier parier?]] * [[https://www.wordreference.com/enfr/bet bet?]] * [[https://www.wordreference.com/enfr/expect expect?]] * [[https://www.wordreference.com/enfr/gamble gamble?]] * [[https://www.wordreference.com/enfr/should should?]] * Quick save development (qsd) * TDD's option `--refactor` == `--pass` * message option * -m * --message * amend should keep message * `"--reuse-message=@",` * WIP right side * TODO * `--edit` OR `--edit-message` option to open `$EDITOR` on commit like `git commit --edit` * how to test it ? * when revert `git clean` * `git workspace` support * `git update-ref` should contain an unique identifier to the workspace * branche name ? * folder path ? * shell completion * gamble hooks * branch based developement * `git commit --fixup` * `git rebase --autosquash` * trunk based developement * `git pull` * `git push` * like git, flags & options & arguments should be retrieved from CLI or environment variable or config's file * re-use `git config` to store in file ? * [[https://rachelcarmena.github.io/2018/11/13/test-driven-programming-workflows.html#my-proposal-of-tcr-variant stash instead of revert ?]] * `--help` should link to the repository @endmindmap

Distribution / publishing backlog

• OS distribution
  • Mac OS X / HomeBrew
  • Linux
  • Tar GZipped
    • cargo package ?
  • Nix
    • crate2nix
    • cargo2nix
    • NixOS documentation
  • RPM
    • cargo-rpm
  • make AppImage updatable
    • bintray-zsync|pinage404|git-gamble-AppImages|git-gamble|git-gamble-_latestVersion-x86_64.AppImage.zsync
  • SnapCraft ?
    • snapcraft's docs about rust
  • FlatPak ?
  • fpm : tool that help to generate to several packages
  • document AppImage with firejail ?
  • document AppImage with bubblewrap ?
  • Open Build Service seems to be a service that build for every Linux targets
    • it can be use
    • thougth REST
      • badly documented
    • with ocs a CLI who seems to be a VCS like SVN (commit = commit + push)
      • who use the REST API under the hood
  • Container Image (Docker) ?
  • Windows / Chocolatey
  • Awesome Rust Deployment
  • Awesome Rust Platform Specific
• URL to download latest version
  • symlinks to URL containing the version name ?
  • using GitLab Pages ?
• generate changelog

CheckList

• [ ] package in local
• [ ] package in CI
• [ ] upload
• [ ] make public available
• [ ] complete how to install
• [ ] manual test
• [ ] update backlog

Technical improvement opportunities

• find why rustc warns about dead_code on identifier that are really used elsewhere
• licence check
  • cargo license
  • cargo deny
• code coverage
  • tarpaulin
  • kcov
• smaller binary
  • cargo bloat
  • cargo deps

Reinvent the wheel

Why reinvent the wheel?

This script already works well

Because i would like to learn Rust ¯\_(ツ)_/¯

Contributing

Any contributions (feedback, bug report, merge request ...) are welcome

To contribute with merge request, install this crates

• clippy
• rustfmt
• rustfix

Deployment

• cargo release