Add elixir 1.17 #144
Add elixir 1.17 #144
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WalkthroughThis update introduces Elixir starter templates, solution files, and supporting infrastructure for a "Build Your Own Git" challenge. It adds shell scripts for compiling and running Elixir projects, project configuration files, code formatters, and documentation. The main program logic is implemented in a new Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant CLI_Module as CLI.main/1
participant FileSystem
User->>CLI_Module: Run program with argv
alt argv is ["init"]
CLI_Module->>FileSystem: Create .git/objects and .git/refs
CLI_Module->>FileSystem: Write .git/HEAD file
CLI_Module-->>User: Print "Initialized git directory"
else argv is [unknown_command]
CLI_Module-->>User: Print "Unknown command"
CLI_Module-->>User: Exit with status 1
else argv is []
CLI_Module-->>User: Print usage instructions
CLI_Module-->>User: Exit with status 1
end
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Actionable comments posted: 1
🧹 Nitpick comments (13)
solutions/elixir/01-gg4/code/mix.exs (2)
5-14: Project configuration is set up for Elixir 1.17.
elixir: "~> 1.17"specifies support for Elixir v1.17 and above.escript: [main_module: CLI]definesCLIas the entry point for the compiled executable.Consider pinning to the patch version (
"~> 1.17.0") if you intend to restrict to 1.17.x and prevent inadvertent upgrades to 1.18+.
23-29: Dependency list is empty but ready for future additions.
You might remove the commented examples if you prefer a cleanerdeps/0, but keeping them can help contributors learn how to add dependencies.compiled_starters/elixir/.codecrafters/run.sh (1)
9-11: Add a pre-flight check for the compiled binary.If
/tmp/codecrafters-build-git-elixiris missing or not executable, the script will fail with a cryptic error. Consider:+ if [ ! -x /tmp/codecrafters-build-git-elixir ]; then + echo "Error: executable not found or not executable at /tmp/codecrafters-build-git-elixir" >&2 + exit 1 + fi exec /tmp/codecrafters-build-git-elixir "$@"starter_templates/elixir/code/.codecrafters/compile.sh (1)
11-12: Ensure dependencies are fetched before building.To support any future dependencies declared in
mix.exs, insert:+ mix deps.get --only prod mix escript.build mv codecrafters_git /tmp/codecrafters-build-git-elixirsolutions/elixir/01-gg4/code/.codecrafters/compile.sh (1)
11-12: Fetch and compile dependencies in CI.Even if the current solution has no external deps, adding:
+ mix deps.get --only prod mix escript.build mv codecrafters_git /tmp/codecrafters-build-git-elixirwill ensure the build remains robust when new dependencies are introduced.
starter_templates/elixir/code/mix.exs (1)
1-4: Align the Mix project module name with the app name.The stub
App.MixProjectis generic. Renaming it to match the OTP app (:codecrafters_git)—for example,CodecraftersGit.MixProject—improves readability and consistency:-defmodule App.MixProject do +defmodule CodecraftersGit.MixProject do use Mix.Projectcompiled_starters/elixir/.codecrafters/compile.sh (1)
11-12: Add dependency fetching for resilience.Although the starter has no external dependencies today, including:
+ mix deps.get --only prod mix escript.build mv codecrafters_git /tmp/codecrafters-build-git-elixirwill future-proof the compile step if deps are ever added.
solutions/elixir/01-gg4/code/lib/main.ex (1)
1-20: LGTM: Well-structured Elixir implementation of Git initThe code properly implements the CLI functionality for initializing a Git repository with the correct directory structure and file content. It follows Elixir best practices with effective pattern matching and explicit error handling.
One potential enhancement would be to handle the case where the
.gitdirectory or its subdirectories already exist. For a more robust implementation, consider:- :ok = File.mkdir(".git") + :ok = File.mkdir_p(".git")And adding error handling for cases where files might already exist.
solutions/elixir/01-gg4/explanation.md (1)
28-32: Add language specification to the fenced code blockAdding a language specification to the fenced code block will improve syntax highlighting and make the document more consistent with Markdown best practices.
-``` +```bash git add . git commit -m "pass 1st stage" # any msg git push origin master🧰 Tools
🪛 markdownlint-cli2 (0.17.2)
28-28: Fenced code blocks should have a language specified
null(MD040, fenced-code-language)
solutions/elixir/01-gg4/code/README.md (1)
7-9: Add a comma after "Along the way" for better readabilityThis is a compound sentence with two independent clauses that should be separated by a comma.
initializing a repository, creating commits and cloning a public repository. -Along the way we'll learn about the `.git` directory, Git objects (blobs, +Along the way, we'll learn about the `.git` directory, Git objects (blobs, commits, trees etc.), Git's transfer protocols and more.🧰 Tools
🪛 LanguageTool
[uncategorized] ~8-~8: A comma might be missing here.
Context: ... cloning a public repository. Along the way we'll learn about the.gitdirectory,...(AI_EN_LECTOR_MISSING_PUNCTUATION_COMMA)
compiled_starters/elixir/README.md (1)
7-9: Add a comma after "Along the way" for better readabilityThis is a compound sentence with two independent clauses that should be separated by a comma.
initializing a repository, creating commits and cloning a public repository. -Along the way we'll learn about the `.git` directory, Git objects (blobs, +Along the way, we'll learn about the `.git` directory, Git objects (blobs, commits, trees etc.), Git's transfer protocols and more.🧰 Tools
🪛 LanguageTool
[uncategorized] ~8-~8: A comma might be missing here.
Context: ... cloning a public repository. Along the way we'll learn about the.gitdirectory,...(AI_EN_LECTOR_MISSING_PUNCTUATION_COMMA)
starter_templates/elixir/code/lib/main.ex (2)
10-13: Consider adding error handling for file operations.The code assumes file operations will always succeed with
:okresults. In a real-world implementation, you might want to handle potential errors when creating directories or writing files.# When uncommenting, consider updating with error handling: -# :ok = File.mkdir(".git") -# :ok = File.mkdir(".git/objects") -# :ok = File.mkdir(".git/refs") -# :ok = File.write(".git/HEAD", "ref: refs/heads/main\n") +# case File.mkdir(".git") do +# :ok -> +# with {:ok, _} <- File.mkdir(".git/objects"), +# {:ok, _} <- File.mkdir(".git/refs"), +# {:ok, _} <- File.write(".git/HEAD", "ref: refs/heads/main\n") do +# IO.puts("Initialized git directory") +# else +# {:error, reason} -> +# IO.puts("Error initializing git directory: #{inspect(reason)}") +# System.halt(1) +# end +# {:error, reason} -> +# IO.puts("Error creating .git directory: #{inspect(reason)}") +# System.halt(1) +# end
1-25: Consider adding module documentation.Adding
@moduledocand@docannotations would help users understand the purpose of the module and its functions.+# @moduledoc """ +# CLI module that implements Git-like functionality for the CodeCrafters challenge. +# """ defmodule CLI do + @doc """ + Main entry point that processes command line arguments. + + ## Parameters + + - argv: List of command-line arguments + """ def main(argv) do # You can use print statements as follows for debugging, they'll be visible when running tests. IO.puts("Logs from your program will appear here!")
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📒 Files selected for processing (30)
compiled_starters/elixir/.codecrafters/compile.sh(1 hunks)compiled_starters/elixir/.codecrafters/run.sh(1 hunks)compiled_starters/elixir/.formatter.exs(1 hunks)compiled_starters/elixir/.gitattributes(1 hunks)compiled_starters/elixir/.gitignore(1 hunks)compiled_starters/elixir/README.md(1 hunks)compiled_starters/elixir/codecrafters.yml(1 hunks)compiled_starters/elixir/lib/main.ex(1 hunks)compiled_starters/elixir/mix.exs(1 hunks)compiled_starters/elixir/your_program.sh(1 hunks)dockerfiles/elixir-1.17.Dockerfile(1 hunks)solutions/elixir/01-gg4/code/.codecrafters/compile.sh(1 hunks)solutions/elixir/01-gg4/code/.codecrafters/run.sh(1 hunks)solutions/elixir/01-gg4/code/.formatter.exs(1 hunks)solutions/elixir/01-gg4/code/.gitattributes(1 hunks)solutions/elixir/01-gg4/code/.gitignore(1 hunks)solutions/elixir/01-gg4/code/README.md(1 hunks)solutions/elixir/01-gg4/code/codecrafters.yml(1 hunks)solutions/elixir/01-gg4/code/lib/main.ex(1 hunks)solutions/elixir/01-gg4/code/mix.exs(1 hunks)solutions/elixir/01-gg4/code/your_program.sh(1 hunks)solutions/elixir/01-gg4/diff/lib/main.ex.diff(1 hunks)solutions/elixir/01-gg4/explanation.md(1 hunks)starter_templates/elixir/code/.codecrafters/compile.sh(1 hunks)starter_templates/elixir/code/.codecrafters/run.sh(1 hunks)starter_templates/elixir/code/.formatter.exs(1 hunks)starter_templates/elixir/code/.gitignore(1 hunks)starter_templates/elixir/code/lib/main.ex(1 hunks)starter_templates/elixir/code/mix.exs(1 hunks)starter_templates/elixir/config.yml(1 hunks)
🧰 Additional context used
🧬 Code Graph Analysis (3)
compiled_starters/elixir/lib/main.ex (2)
solutions/elixir/01-gg4/code/lib/main.ex (1)
main(2-19)starter_templates/elixir/code/lib/main.ex (1)
main(2-24)
starter_templates/elixir/code/lib/main.ex (1)
solutions/elixir/01-gg4/code/lib/main.ex (1)
main(2-19)
solutions/elixir/01-gg4/code/lib/main.ex (2)
compiled_starters/elixir/lib/main.ex (1)
main(2-24)starter_templates/elixir/code/lib/main.ex (1)
main(2-24)
🪛 LanguageTool
solutions/elixir/01-gg4/code/README.md
[uncategorized] ~8-~8: A comma might be missing here.
Context: ... cloning a public repository. Along the way we'll learn about the .git directory,...
(AI_EN_LECTOR_MISSING_PUNCTUATION_COMMA)
compiled_starters/elixir/README.md
[uncategorized] ~8-~8: A comma might be missing here.
Context: ... cloning a public repository. Along the way we'll learn about the .git directory,...
(AI_EN_LECTOR_MISSING_PUNCTUATION_COMMA)
🪛 Hadolint (2.12.0)
dockerfiles/elixir-1.17.Dockerfile
[error] 10-10: invalid flag: --exclude
(DL1000)
🪛 markdownlint-cli2 (0.17.2)
solutions/elixir/01-gg4/explanation.md
28-28: Fenced code blocks should have a language specified
null
(MD040, fenced-code-language)
🔇 Additional comments (32)
solutions/elixir/01-gg4/code/.gitattributes (1)
1-2: Approve line-ending normalization
The.gitattributesfile correctly enforces automatic line-ending normalization for all text files in the solution directory, ensuring cross-platform consistency.compiled_starters/elixir/.gitattributes (1)
1-2: Approve line-ending normalization in starter
This.gitattributesentry ensures that starter files undercompiled_starters/elixir/will have normalized line endings, matching the solution setup.compiled_starters/elixir/.formatter.exs (1)
1-5: Approve Elixir formatter configuration
The input patterns covermix.exs,.formatter.exs, and all.ex/.exsfiles underconfig,lib, andtest. This aligns with standard Mix formatting conventions.solutions/elixir/01-gg4/code/.gitignore (1)
1-28: Approve Elixir solution .gitignore patterns
The ignore rules comprehensively cover build artifacts (_build/), dependencies (deps/), coverage reports (cover/), and other temporary files (.ez,erl_crash.dump, etc.). This mirrors best practices for Mix-based projects.solutions/elixir/01-gg4/code/mix.exs (3)
1-4: Module definition and Mix integration look correct.
TheApp.MixProjectmodule properly usesMix.Projectand follows standard conventions.
17-21: Application extra applications are minimal and appropriate.
Starting only:loggeris sufficient if your runtime logic doesn’t depend on other OTP apps.
5-14:✅ Verification successful
Verify the existence and namespace of the
CLImodule.
Ensure thatlib/main.exdefines a top-levelCLImodule (i.e.,defmodule CLI do ... end) so thatmix escript.buildcan correctly resolve themain_module.Run:
🏁 Script executed:
#!/bin/bash # Verify top-level CLI module declaration rg --max-count=1 "^defmodule CLI" -n solutions/elixir/01-gg4/code/libLength of output: 131
CLI module correctly defined
Verified that
CLIis declared insolutions/elixir/01-gg4/code/lib/main.ex:1(defmodule CLI do … end), soescriptwill resolvemain_module: CLIwithout issues.starter_templates/elixir/config.yml (1)
1-3: Starter template configuration is correct.
Therequired_executableanduser_editable_filekeys align with our challenge runner’s expectations for setting up the development environment.solutions/elixir/01-gg4/code/.formatter.exs (1)
1-4: Formatter inputs are correctly specified.
These patterns ensuremix formatcoversmix.exs,.formatter.exs, and all.ex/.exsfiles under the standard directories.starter_templates/elixir/code/.formatter.exs (1)
1-4: Formatter configuration in starter matches solution.
Consistent formatting rules across starter and solution templates will help maintain code style.compiled_starters/elixir/.gitignore (5)
1-7: Ignoring compiled binaries and build artifacts is correct.
/codecrafters_gitand/_build/ensure that generated escripts and artifacts aren’t committed.
8-12: Coverage and dependencies folders are excluded.
Patterns for/cover/and/deps/will keep test artifacts and fetched dependencies out of source control.
13-18: Documentation and fetch artifacts are ignored.
/doc/and/.fetchalign with Mix’s conventions.
19-21: Erlang VM crash dumps are excluded.
erl_crash.dumpis appropriately ignored.
22-27: Archive artifacts are covered.
*.ezandapp-*.tarpatterns prevent hex archives from polluting the repo.solutions/elixir/01-gg4/code/codecrafters.yml (2)
5-5: Configuration for debug logs added.
Thedebug: falseflag is a sensible default to avoid verbose output in the solution environment.
11-11: Elixir version set to 1.17.
Lockinglanguage_pack: elixir-1.17aligns with the PR objective to support Elixir 1.17.compiled_starters/elixir/codecrafters.yml (2)
5-5: Default debug logging disabled.
Keepingdebug: falsein the compiled starter is appropriate for clean initial runs.
11-11: Elixir version locked to 1.17.
Specifyingelixir-1.17in the starter ensures consistency with the solution and the intended environment.starter_templates/elixir/code/.gitignore (2)
4-27: Standard Elixir build artifacts are ignored.
The rest of the patterns correctly exclude_build/,cover/,deps/,doc/,.fetch, crash dumps, archive artifacts (*.ez), and tarballs (app-*.tar). This aligns with typical Elixir/Mix workflows.
1-2:✅ Verification successful
Verify compiled binary ignore pattern.
The line/codecrafters_gitshould match the escript executable name produced by your Mix project (as invoked in.codecrafters/compile.shand.codecrafters/run.sh). Please confirm the actual output filename inmix.exsand update this entry if needed to ensure the binary is properly excluded.
🏁 Script executed:
#!/bin/bash # Verify escript name defined in mix.exs rg -n "escript: *:.*" starter_templates/elixir/code/mix.exsLength of output: 61
🏁 Script executed:
#!/bin/bash # Check project app name rg -n "app:" -C2 starter_templates/elixir/code/mix.exs # Check for any escript configuration rg -n "escript" -C2 starter_templates/elixir/code/mix.exsLength of output: 348
.gitignore escript ignore pattern verified
The Mix project’sapp: :codecrafters_gittogether withescript: [main_module: CLI]yields a binary namedcodecrafters_gitby default, so the/codecrafters_gitentry in.gitignoreis correct.starter_templates/elixir/code/.codecrafters/run.sh (2)
1-8: Shell script header and comments are clear.
The shebang (#!/bin/sh),set -e, and documentation comments correctly frame this run script for CodeCrafters.
9-12: Executes the compiled escript.
The call toexec /tmp/codecrafters-build-git-elixir "$@"cleanly forwards arguments to the built escript. Ensure the compile step generates the binary at this location.solutions/elixir/01-gg4/code/.codecrafters/run.sh (2)
1-8: Run script header is appropriately documented.
Shebang,set -e, and usage comments are all present to meet CodeCrafters conventions.
9-12: Executes the solution escript.
Forwarding"$@"to the/tmp/codecrafters-build-git-elixirbinary matches the starter logic and will correctly invoke the compiled solution.compiled_starters/elixir/your_program.sh (1)
1-25: LGTM: Shell script follows best practicesThe shell script is well-structured with proper directory navigation, error handling with
set -e, and correct use ofexecto pass arguments. The comments clearly explain the purpose and relationship to the remote compilation process.solutions/elixir/01-gg4/code/your_program.sh (1)
1-25: LGTM: Consistent shell script implementationThis script is identical to the one in the compiled_starters directory, maintaining consistency across the starter and solution codebases. It correctly handles compilation and execution of the Elixir Git implementation.
solutions/elixir/01-gg4/diff/lib/main.ex.diff (1)
1-41: LGTM: Properly uncommented the Git init implementationThe diff correctly uncomments and implements the first stage of the Git challenge. The code follows Elixir best practices with proper pattern matching, error handling, and file operations to create the expected
.gitdirectory structure.compiled_starters/elixir/mix.exs (1)
1-30: LGTM: Mix.exs file is correctly configured for the Elixir 1.17 projectThe Mix project configuration is well-structured and correctly sets up:
- Proper app name and versioning
- Correct Elixir version requirement (~> 1.17)
- Escript configuration pointing to the CLI module as the main entry point
- Required applications and empty dependency list (with helpful commented examples)
compiled_starters/elixir/lib/main.ex (1)
1-25: LGTM: The CLI module is correctly implemented as a starter templateThe CLI module is well-structured with:
- Proper entry point using the main/1 function to accept command-line arguments
- Helpful debug statement to show users how to output logs
- Well-commented code block that correctly implements the Git init command
- Proper pattern matching for different command scenarios
The implementation matches the solution example and follows Elixir best practices.
starter_templates/elixir/code/lib/main.ex (2)
1-5: Clear module structure with helpful debug statement.The module definition and debug print statement provide a good starting point for users. The debug message clearly indicates where logs will appear during testing.
6-23: Well-structured commented code block for the first challenge stage.The commented implementation provides clear guidance on how to initialize a Git repository, with proper directory structure creation and HEAD file setup. The pattern matching approach is idiomatic Elixir and handles the three main cases appropriately:
- Git init command
- Unknown commands
- No arguments provided
This demonstrates good practices for new Elixir developers.
| # .git & README.md are unique per-repository. We ignore them on first copy to prevent cache misses | ||
| COPY --exclude=.git --exclude=README.md . /app | ||
|
|
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Fix invalid COPY flags; use .dockerignore instead
Docker’s COPY does not support --exclude. To prevent cache misses on .git and README.md, create a .dockerignore at the repo root listing those entries, then simplify the Dockerfile copy step:
- COPY --exclude=.git --exclude=README.md . /app
+ # Ensure .dockerignore excludes .git and README.md
+ COPY . /appAlso add a .dockerignore alongside the Dockerfile:
.git
README.md
🧰 Tools
🪛 Hadolint (2.12.0)
[error] 10-10: invalid flag: --exclude
(DL1000)
Add Dockerfile, starter template, compiled starter, and solution for Elixir v1.17
Summary by CodeRabbit
New Features
Documentation
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