Added

• The list of exercises is now searchable by pressing s or / 🔍️ (thanks to @frroossst)
• New option c in the prompt to manually check all exercises ✅ (thanks to @Nahor)
• New command check-all to manually check all exercises ✅ (thanks to @Nahor)
• Addictive animation for showing the progress of checking all exercises. A nice showcase of parallelism in Rust ✨
• New option x in the prompt to reset the file of the current exercise 🔄
• Allow dead_code for all exercises and solutions ⚰️ (thanks to @huss4in)
• Pause input while running an exercise to avoid unexpected prompt interactions ⏸️
• Limit the maximum number of exercises to 999. Any third-party exercises willing to reach that limit? 🔝

Changed

• enums3: Remove redundant enum definition task (thanks to @senekor)
• if2: Make the exercise less confusing by avoiding "fizz", "fuzz", "foo", "bar" and "baz" (thanks to @senekor)
• hashmap3: Use the method Entry::or_default.
• Update the state of all exercises when checking all of them (thanks to @Nahor)
• The main prompt doesn't need a confirmation with ENTER on Unix-like systems anymore.
• No more jumping back to a previous exercise when its file is changed. Use the list to jump between exercises.
• Dump the solution file after an exercise is done even if the solution's directory doesn't exist.
• Rework the footer in the list.
• Optimize the file watcher.

Fixed

• Fix bad contrast in the list on terminals with a light theme.

Added

• Add the following exercise lints:
  • forbid(unsafe_code): You shouldn't write unsafe code in Rustlings.
  • forbid(unstable_features): You don't need unstable features in Rustlings and shouldn't rely on them while learning Rust.
  • forbid(todo): You forgot a todo!().
  • forbid(empty_loop): This can only happen by mistake in Rustlings.
  • deny(infinite_loop): No infinite loops are needed in Rustlings.
  • deny(mem_forget): You shouldn't leak memory while still learning Rust.
• Show a link to every exercise file in the list.
• Add scroll padding in the list.
• Break the help footer of the list into two lines when the terminal width isn't big enough.
• Enable scrolling with the mouse in the list.
• dev check: Show the progress of checks.
• dev check: Check that the length of all exercise names is lower than 32.
• dev check: Check if exercise contains no tests and isn't marked with test = false.

Changed

• The compilation time when installing Rustlings is reduced.
• Pressing c in the list for "continue on" now quits the list after setting the selected exercise as the current one.
• Better highlighting of the solution file after an exercise is done.
• Don't show the output of successful tests anymore. Instead, show the pretty output for tests.
• Be explicit about q only quitting the list and not the whole program in the list.
• Be explicit about r only resetting one exercise (the selected one) in the list.
• Ignore the standard output of git init.
• threads3: Remove the queue length and improve tests.
• errors4: Use match instead of a comparison chain in the solution.
• functions3: Only take u8 to avoid using a too high number of iterations by mistake.
• dev check: Always check with strict Clippy (warnings to errors) when checking the solutions.

Fixed

• Fix the error on some systems about too many open files during the final check of all exercises.
• Fix the list when the terminal height is too low.
• Restore the terminal after an error in the list.

Added

• Show a message before checking and running an exercise. This gives the user instant feedback and avoids confusion if the checks take too long.
• Show a helpful error message when trying to install Rustlings with a Rust version lower than the minimum one that Rustlings supports.
• Add a README.md file to the solutions/ directory.
• Allow initializing Rustlings in a Cargo workspace.
• dev check: Check that all solutions are formatted with rustfmt.

Changed

• Remove the state file and the solutions directory from the generated .gitignore file.
• Run the final check of all exercises in parallel.
• Small exercise improvements.

Added

• dev check: Check that all exercises (including third-party ones) include at least one TODO comment.
• dev check: Check that all exercises actually fail to run (not already solved).

Changed

• Make enum variants more consistent between enum exercises.
• iterators3: Teach about the possible case of integer overflow during division.

Fixed

• Exit with a helpful error message on missing/unsupported terminal/TTY.
• Mark the last exercise as done.

Small exercise improvements and fixes. Most importantly, fixed that the exercise clippy1 was already solved 😅

This release is the result of a complete rewrite to deliver a ton of new features and improvements ✨ The most important changes are highlighted below.

Installation

The installation has been simplified a lot! To install Rustlings after installing Rust, all what you need to do now is running the following command:

cargo install rustlings

Yes, this means that Rustlings is now on crates.io 🎉

You can read about the motivations of this change in this issue.

UI/UX

• The UI is now responsive when the terminal is resized.
• The progress bar was moved to the bottom so that you can always see your progress and the current exercise to work on.
• The current exercise path is now a terminal link. It will open the exercise file in your default editor when you click on it.
• A small prompt is now always shown at the bottom. It allows you to choose an action by entering a character. For example, entering h will show you the hint of the current exercise.
• The comment "I AM NOT DONE!" doesn't exist anymore. Instead of needing to remove it to go to the next exercise, you need to enter n in the terminal.

List mode

A new list mode was added! You can enter it by entering l in the watch mode. It offers the following features:

• Browse all exercises and see their state (pending/done).
• Filter exercises based on their state (pending/done).
• Continue at another exercise. This allows you to skip some exercises or go back to previous ones.
• Reset an exercise so you can start over and revert your changes.

Solutions

After finishing an exercise, a solution file will be available and Rustlings will show you its path in green. This allows you to compare your solution with an idiomatic solution and maybe learn about other ways to solve a problem.

While writing the solutions, all exercises have been polished 🌟 For example, every exercise now contains TODO comments to highlight what the user needs to change and where.

LSP support out of the box

Instead of creating a project.json file using rustlings lsp, Rustlings now works with a Cargo.toml file out of the box. No actions are needed to activate the language server rust-analyzer.

This should avoid issues related to the language server or to running exercises, especially the ones with Clippy.

Clippy

Clippy lints are now shown on all exercises, not only the Clippy exercises 📎 Make Clippy your friend from early on 🥰

Third-party exercises

Rustlings now supports third-party exercises!

Do you want to create your own set of Rustlings exercises to focus on some specific topic? Or do you want to translate the original Rustlings exercises? Then follow the link to the guide about third-party exercises!

Changed

• Converted all exercises with assertions to test mode.

Fixed

• cow1: Reverted regression introduced by calling to_mut where it shouldn't have been called, and clarified comment.
• primitive_types3: Require at least an array of 100 elements.
• Removed hint comments when no hint exists for the exercise.
• as_ref_mut: Fixed a typo in a test function name.
• enums3: Fixed formatting with rustfmt.

Added

• New exercise: if3, teaching the user about if let statements.
• hashmaps2: Added an extra test function to check if the amount of fruits is higher than zero.
• enums3: Added a test for Message.
• if1: Added a test case to check equal values.
• if3: Added a note specifying that there are no test changes needed.

Changed

• Swapped the order of threads and smart pointer exercises.
• Rewrote the CLI to use clap - it's matured much since we switched to argh :)
• structs3: Switched from i32 to u32.
• move_semantics: Switched 1-4 to tests, and rewrote them to be way simpler, while still teaching about the same concepts.

Fixed

• iterators5:
  • Removed an outdated part of the hint.
  • Renamed variables to use snake_case.
• vecs2: Updated the hint to reference the renamed loop variable.
• enums3: Changed message string in test so that it gets properly tested.
• strings2: Corrected line number in hint, then removed it (this both happened as part of this release cycle).
• primitive_types4: Updated hint to the correct ending index.
• quiz1: Removed duplicated sentence from exercise comments.
• errors4: Improved comment.
• from_into: Fixed test values.
• cow1: Added .to_mut() to distinguish from the previous test case.
• threads2: Updated hint text to reference the correct book heading.

Housekeeping

• Cleaned up the explanation paragraphs at the start of each exercise.
• Lots of Nix housekeeping that I don't feel qualified to write about!
• Improved CI workflows, we're now testing on multiple platforms at once.

Fixed

• Reverted rust-project.json path generation due to an upstream rust-analyzer fix.

Added

• strings2: Added a reference to the book chapter for reference conversion
• lifetimes: Added a link to the lifetimekata project
• Added a new tests4 exercises, which teaches about testing for panics
• Added a ! prefix command to watch mode that runs an external command
• Added a --success-hints option to watch mode that shows hints on exercise success

Changed

• vecs2: Renamed iterator variable bindings for clarify
• lifetimes: Changed order of book references
• hashmaps2: Clarified instructions in the todo block
• Moved lifetime exercises before test exercises (via the recommended book ordering)
• options2: Improved tests for layering options
• modules2: Added more information to the hint

Fixed

• errors2: Corrected a comment wording
• iterators2: Fixed a spelling mistake in the hint text
• variables: Wrapped the mut keyword with backticks for readability
• move_semantics2: Removed references to line numbers
• cow1: Clarified the owned_no_mutation comments
• options3: Changed exercise to panic when no match is found
• rustlings lsp now generates absolute paths, which should fix VSCode rust-analyzer usage on Windows

Housekeeping

• Added a markdown linter to run on GitHub actions
• Split quick installation section into two code blocks

Changed

• vecs: Added links to iter_mut and map to README.md
• cow1: Changed main to tests
• iterators1: Formatted according to rustfmt

Fixed

• errors5: Unified undisclosed type notation
• arc1: Improved readability by avoiding implicit dereference
• macros4: Prevented auto-fix by adding #[rustfmt::skip]
• cli: Actually show correct progress percentages

Changed

• Reordered exercises
  • Unwrapped standard_library_types into iterators and smart_pointers
  • Moved smart pointer exercises behind threads
  • Ordered rc1 before arc1
• intro1: Added a note on rustlings lsp
• threads1: Panic if threads are not joined
• cli:
  • Made progress bar update proportional to amount of files verified
  • Decreased watch delay from 2 to 1 second

Fixed

• Capitalized "Rust" in exercise hints
• enums3: Removed superfluous tuple brackets
• quiz2, clippy1, iterators1: Fixed a typo
• rc1: Fixed a prompt error
• cli:
  • Fixed a typo in a method name
  • Specified the edition in rustc commands

Housekeeping

• Bumped min Rust version to 1.58 in installation script

Added

• cli: Added a percentage display in watch mode
• Added a flake.nix for Nix users

Changed

• structs3: Added an additional test
• macros: Added a link to MacroKata in the README

Fixed

• strings3: Added a link to std in the hint
• threads1: Corrected a hint link
• iterators1: Clarified hint steps
• errors5: Fix a typo in the hint
• options1: Clarified on the usage of the 24-hour system
• threads2, threads3: Explicitly use Arc::clone
• structs3: Clarifed the hint
• quiz2, as_ref_mut, options1, traits1, traits2: Clarified hints
• traits1, traits2, cli: Tidied up unmatching backticks
• enums2: Removed unnecessary indirection of self
• enums3: Added an extra tuple comment

Housekeeping

• Added a VSCode extension recommendation
• Applied some Clippy and rustfmt formatting
• Added a note on Windows PowerShell and other shell compatibility

Fixed

• quiz1: Reworded the comment to actually reflect what's going on in the tests. Also added another assert just to make sure.
• rc1: Fixed a typo in the hint.
• lifetimes: Add quotes to the println! output, for readability.

Housekeeping

• Fixed a typo in README.md

Added

• Added a reset command

Changed

• options2: Convert the exercise to use tests

Fixed

• threads3: Fixed a typo
• quiz1: Adjusted the explanations to be consistent with the tests

Bug Fixes

• Fixed an incorrect assertion in options1

Features

• Added a new rc1 exercise.
• Added a new cow1 exercise.

Bug Fixes

• variables5: Corrected reference to previous exercise
• functions4: Fixed line number reference
• strings3: Clarified comment wording
• traits4, traits5: Fixed line number reference
• traits5:
  • Fixed typo in "parameter"
  • Made exercise prefer a traits-based solution
• lifetimes2: Improved hint
• threads3: Fixed typo in hint
• box1: Replaced unimplemented! with todo!
• errors5: Provided an explanation for usage of Box<dyn Error>
• quiz2: Fixed a typo
• macros: Updated the macros book link
• options1:
  • Removed unused code
  • Added more granular tests
• Fixed some comment syntax shenanigans in info.toml

Housekeeping

• Fixed a typo in .editorconfig
• Fixed a typo in integration_tests.rs
• Clarified manual installation instructions using cargo install --path .
• Added a link to our Zulip in the readme file

Features

• Hint comments in exercises now also include a reference to the hint watch mode subcommand.
• intro1: Added more hints to point the user to the source file.
• variables: Switched variables3 and variables4.
• Moved vec and primitive_types exercises before move_semantics.
• Renamed vec to vecs to be more in line with the naming in general.
• Split up the collections exercises in their own folders.
• vec2: Added a second part of the function that provides an alternative, immutable way of modifying vec values.
• enums3: Added a hint.
• Moved strings before modules.
• Added a strings3 exercise to teach modifying strings.
• Added a hashmaps3 exercise for some advanced usage of hashmaps.
• Moved the original quiz2 to be strings4, since it only tested strings anyways.
• Reworked quiz2 into a new exercise that tests more chapters.
• Renamed option to options.
• options1: Rewrote parts of the exercise to remove the weird array iteration stuff.
• Moved generics3 to be quiz3.
• Moved box/arc exercises behind iterators.
• iterators4: Added a test for factorials of zero.
• Split threads1 between two exercises, the first one focusing more on JoinHandles.
• Added a threads3 exercises that uses std::sync::mpsc.
• Added a clippy3 exercises with some more interesting checks.
• as_ref_mut: Added a section that actually tests AsMut.
• Added 3 new lifetimes exercises.
• Added 3 new traits exercises.

Bug Fixes

• variables2: Made output messages more verbose.
• variables5: Added a nudging hint about shadowing.
• variables6: Fixed link to book.
• functions: Clarified the README wording. Generally cleaned up some hints and added some extra comments.
• if2: Renamed function name to foo_if_fizz.
• move_semantics: Clarified some hints.
• quiz1: Renamed the function name to be more verbose.
• structs1: Use an integer type instead of strings. Renamed "unit structs" to "unit-like structs", as is used in the book.
• structs3: Added the panic! statement in from the beginning.
• errors1: Use is_empty() instead of len() > 0
• errors3: Improved the hint.
• errors5: Improved exercise instructions and the hint.
• errors6: Provided the skeleton of one of the functions that's supposed to be implemented.
• iterators3: Inserted todo! into divide() to keep a compiler error from happening.
• from_str: Added a hint comment about string error message conversion with Box<dyn Error>.
• try_from_into: Fixed the function name in comment.

Removed

• Removed the legacy LSP feature that was using mod.rs files.
• Removed quiz4.
• Removed advanced_errs. These were the last exercises in the recommended order, and I've always felt like they didn't quite fit in with the mostly simple, book-following style we've had in Rustlings.

Housekeeping

• Added missing exercises to the book index.
• Updated spacing in Cargo.toml.
• Added a GitHub actions config so that tests run on every PR/commit.

Features

• Added a progress indicator for rustlings watch.
• The installation script now checks for Rustup being installed.
• Added a rustlings lsp command to enable rust-analyzer.

Bug Fixes

• move_semantics5: Replaced "in vogue" with "in scope" in hint.
• if2: Fixed a typo in the hint.
• variables1: Fixed an incorrect line reference in the hint.
• Fixed an out of bounds check in the installation Bash script.

Housekeeping

• Replaced the git.io URL with the fully qualified URL because of git.io's sunsetting.
• Removed the deprecated Rust GitPod extension.

Features

• The amount of dependency crates that need to be compiled went down from ~65 to ~45 by bumping dependency versions.
• The minimum Rust version in the install scripts has been bumped to 1.56.0 (this isn't in the release itself, since install scripts don't really get versioned)

Bug Fixes

• arc1: A small part has been rewritten using a more functional code style (#968).
• using_as: A small part has been refactored to use sum instead of fold, resulting in better readability.

Housekeeping

• The changelog will now be manually written instead of being automatically generated by the Git log.

Features

• Add move_semantics6.rs exercise (#908) (3f0e1303)
• intro: Add intro section. (21c9f441)
• Include exercises folder in the project structure behind a feature, enabling rust-analyzer to work (#917) (179a75a6)

Bug Fixes

• Fix a few spelling mistakes (1c0fe3cb)
• cli:
  • Move long text strings into constants. (f78c4802)
  • Replace filter_map() with find_map() (9b27e8d)
• clippy1:
  • Set clippy::float_cmp lint to deny (#907) (71a06044)
  • Updated code to test correctness clippy lint with approx_constant lint rule (f2650de3)
• errors1:
  • Add a comment to make the purpose more clear (#486) (cbcde345)
  • Don't modify tests (#958) (60bb7cc)
• errors6: Remove existing answer code (43d0623)
• functions5: Remove wrong new line and small English improvements (#885) (8ef4869b)
• install: protect path with whitespaces using quotes and stop at the first error (d114847f)
• intro1: Add compiler error explanation. (9b8de655)
• iterators1: reorder TODO steps (0bd7a063)
• move_semantics2: Add comment (89650f80)
• move_semantics5: correct typo (#857) (46c28d5c)
• quiz1: update to say quiz covers "If" (1622e8c1)
• structs3:
  • Add a hint for panic (#608) (4f7ff5d9)
  • remove redundant 'return' (#852) (bf33829d)
  • Assigned value to cents_per_gram in test (d1ee2da)
• structs3.rs: assigned value to cents_per_gram in test (d1ee2daf)
• traits1: rename test functions to snake case (#854) (1663a16e)

Documentation improvements

• Add hints on how to get GCC installed (#741) (bc56861)
• Fix some code blocks that were not highlighted (17f9d74)

Features

• add advanced_errs2 (abd6b70c)
• add advanced_errs1 (882d535b)
• Add a farewell message when quitting watch (1caef0b4)
• add more watch commands (a7dc080b, closes #842)
• modules: update exercises, add modules3 (#822) (dfd2fab4)
• quiz1: add default function name in comment (#838) (0a11bad7)

Bug Fixes

• Correct small typo in exercises/conversions/from_str.rs (86cc8529)
• cli: typo in exercise.rs (#848) (06d5c097)
• from_str, try_from_into: custom error types (2dc93cad)
• modules2: fix typo (#835) (1c3beb0a)
• move_semantics5:
  • change &mut *y to &mut x (#814) (d75759e8)
  • Clarify instructions (df25684c)
• quiz1: Fix inconsistent wording (#826) (03131a3d)

Features

• Add move_semantics5 exercise. (#746) (399ab328)
• cli: Add "next" to run the next unsolved exercise. (#785) (d20e413a)

Bug Fixes

• rename result1 to errors4 (50ab289d)
• move_semantics5 hints (1b858285)
• remove trailing whitespaces from iterators1 (4d4fa774)
• add hints to generics1 and generics2 exercises (31457940)
• remove trailing whitespace (d9b69bd1)
• installation: first PowerShell command (aa9a943d)
• iterators5: derive Clone, Copy (91fc9e31)
• quiz1: Updated question description (#794) (d8766496)
• try_from_into, from_str: hints for dyn Error (11d2cf0d)
• variables5: confine the answer further (48ffcbd2)

Bug Fixes

• Fix spelling error in main.rs (91ee27f2)
• typo in default out text (644c49f1)
• collections: Naming exercises for vectors and hashmap (bef39b12)
• from_str:
  • Correct typos (5f7c89f8)
  • test for error instead of unwrap/should_panic (15e71535)
  • use trait objects for from_str (c3e7b831)
• functions3: improve function argument type (#687) (a6509cc4)
• hashmap2: Update incorrect assertion (#660) (72aaa15e)
• info: Fix typo (#635) (cddc1e86)
• iterators2: Moved errors out of tests. (baf4ba17, closes #359)
• iterators3: Enabled iterators3.rs to run without commented out tests. (c6712dfc)
• main: Let find_exercise work with borrows (347f30bd)
• move_semantics4:
  • Remove redundant "instead" (#640) (cc266d7d)
  • Small readbility improvement (#617) (10965920)
• option2: Rename uninformative variables (#675) (b4de6594)
• quiz3: Force an answer to Q2 (#672) (0d894e6f)
• structs: Add 5.3 to structs/README (#652) (6bd791f2)
• structs2: correct grammar in hint (#663) (ebdb66c7)
• structs3:
  • reword heading comment (#664) (9f3e8c2d)
  • add check to prevent naive implementation of is_international (05a753fe)
• threads1: line number correction (7857b0a6)
• try_from_into: use trait objects (2e93a588)

Features

• Replace clap with argh (7928122f)
• Replace emojis when NO_EMOJI env variable present (8d62a996)
• Added iterators5.rs exercise. (b29ea17e)
• arc1: Add more details to description and hint (#710) (81be4044)
• cli: Improve the list command with options, and then some (8bbe4ff1)
• list:
  • updated progress percentage (1c6f7e4b)
  • added progress info (c0e3daac)

Features

• Rewrite default out text (44d39112)
• match exercise order to book chapters (#541) (033bf119)
• Crab? (#586) (fa9f522b)
• add "rustlings list" command (838f9f30)
• try_from_into: remove duplicate annotation (04f1d079)

Bug Fixes

• update structs README (bcf14cf6)
• added missing exercises to info.toml (90cfb6ff)
• gives a bit more context to magic number (30644c9a)
• functions2: Change signature to trigger precise error message: (#605) (0ef95947)
• structs1: Adjust wording (#573) (9334783d)
• try_from_into:
  • type error (4f4cfcf3)
  • Update description (#584) (96347df9)
• vec1: Have test compare every element in a and v (9b6c6293)

Features

• Add HashMap exercises (633c00cf)
• Add Vec exercises (0c12fa31)
• primitive_types6: Add a test (#548) (2b1fb2b7)
• try_from_into: Add tests (#571) (95ccd926)

Bug Fixes

• log error output when inotify limit is exceeded (d61b4e5a)
• more unique temp_file (5643ef05)
• installation: Update the MinRustVersion (21bfb2d4)
• iterators2: Update description (#578) (197d3a3d)
• primitive_types6:
  • remove 'unused doc comment' warning (472d8592)
  • missing comma in test (4fb230da)
• quiz3: Second test is for odd numbers, not even. (#553) (18e0bfef)

Bug Fixes

• Update rustlings version in Cargo.lock (1cc40bc9)
• arc1: index mod should equal thread count (b4062ef6)
• enums3: Update Message::ChangeColor to take a tuple. (#457) (4b6540c7)
• exercises: adding question mark to quiz2 (101072ab)
• generics3: clarify grade change (47f7672c)
• structs3: Small adjustment of variable name (114b54cb)
• using_as: Add test so that proper type is returned. (#512) (3286c5ec)

Features

• Added iterators1.rs exercise (9642f5a3)
• Add ability to run rustlings on repl.it (#471) (8f7b5bd0)
• Add gitpod support (#473) (4821a8be)
• Remind the user of the hint option (#425) (816b1f5e)
• Remind the user of the hint option (#425) (9f61db5d)
• cli: Added 'cls' command to 'watch' mode (#474) (4f2468e1)
• try_from_into: Add insufficient length test (#469) (523d18b8)

Breaking Changes

• Add a --nocapture option to display test harnesses' outputs (8ad5f9bf)
• Rename test to quiz, fixes #244 (010a0456)

Features

• Add traits README (173bb141)
• Add box1.rs exercise (7479a473)
• Rewrite try_from_into (#393) (763aa6e3)
• Add if2 exercise (1da84b5f)
• Added exercise structs3.rs (b66e2e09)
• Add exercise variables6 covering const (#352) (5999acd2)

Bug Fixes

• Change then to than (ddd98ad7)
• rename quiz1 to tests1 in info (#420) (0dd1c6ca)
• fix quiz naming inconsistency (#421) (5563adbb)
• confine the user further in variable exercises (06ef4cc6)
• update iterator and macro text for typos and clarity (95900828)
• update generics2 closes #362 (964c974a)
• confusing comment in conversions/try_from_into.rs (c9e4f2cf)
• arc1: Passively introduce attributes (#429) (113cdae2)
• box1: fix comment typo (#426) (bb2ca251)
• errorsn: Try harder to confine the user. (#388) (2b20c8a0)
• from_into.rs: typo (a901499e)
• generics2: Guide students to the answer (#430) (e6bd8021)
• installation:
  • Provide a backup git reference when tag can't be curl (9e4fb100)
  • Check if python is available while checking for git,rustc and cargo (9cfb617d)
• option1:
  • Don't add only zeros to the numbers array (cce6a442)
  • Add cast to usize, as it is confusing in the context of an exercise about Option (f6cffc7e)
• option2: Add TODO to comments (#400) (10967bce)
• options1: Add hint about Array Initialization (#389) (9f75554f)
• test2: name of type String and &str (#394) (d6c0a688)
• variables6: minor typo (#419) (524e17df)

Breaking Changes

• make "compile" exercises print output (#278) (3b6d5c)

Bug Fixes

• primitive_types: revert primitive_types4 (#296) (b3a3351e)
• run: compile clippy exercise files (#295) (3ab084a4)
• conversions:
  • add additional test to meet exercise rules (#284) (bc22ec3)
  • remove duplicate not done comment (#292) (dab90f)
• don't hardcode documentation version for traits (#288) (30e6af)

Features

• add Option2 exercise (#290) (86b5c08b)
• add exercise for option (#282) (135e5d47)
• add new exercises for generics (#280) (76be5e4e)
• ci: add buildkite config (b049fa2c)

2.2.1 (2020-02-27)

Bug Fixes

• Re-add cloning the repo to install scripts (3d9b03c5)

Features

• Add clippy lints (#269) (1e2fd9c9)