init [skip ci]

.codecrafters/compile.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+#
+# This script is used to compile your program on CodeCrafters
+#
+# This runs before .codecrafters/run.sh
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit on failure
+
+cargo build --release --target-dir=/tmp/codecrafters-grep-target --manifest-path Cargo.toml

.codecrafters/run.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+#
+# This script is used to run your program on CodeCrafters
+#
+# This runs after .codecrafters/compile.sh
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit on failure
+
+exec /tmp/codecrafters-grep-target/release/grep-starter-rust "$@"

.gitattributes

@@ -0,0 +1 @@
+* text=auto

.gitignore

@@ -0,0 +1,10 @@
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb

Cargo.lock

@@ -0,0 +1,79 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "anyhow"
+version = "1.0.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2cb2f989d18dd141ab8ae82f64d1a8cdd37e0840f73a406896cf5e99502fab61"
+
+[[package]]
+name = "bytes"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dfb24e866b15a1af2a1b663f10c6b6b8f397a84aadb828f12e5b289ec23a3a3c"
+
+[[package]]
+name = "grep-starter-rust"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "bytes",
+ "thiserror",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa563d17ecb180e500da1cfd2b028310ac758de548efdd203e18f283af693f37"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc371affeffc477f42a221a1e4297aedcea33d47d19b61455588bd9d8f6b19ac"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "thiserror"
+version = "1.0.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a9cd18aa97d5c45c6603caea1da6628790b37f7a34b6ca89522331c5180fed0"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fb327af4685e4d03fa8cbcf1716380da910eeb2bb8be417e7f9fd3fb164f36f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"

Cargo.toml

@@ -0,0 +1,24 @@
+# DON'T EDIT THIS!
+#
+# Codecrafters relies on this file being intact to run tests successfully. Any changes
+# here will not reflect when CodeCrafters tests your code, and might even cause build
+# failures.
+#
+# DON'T EDIT THIS!
+[package]
+name = "grep-starter-rust"
+version = "0.1.0"
+authors = ["Codecrafters <hello@codecrafters.io>"]
+edition = "2021"
+
+# DON'T EDIT THIS!
+#
+# Codecrafters relies on this file being intact to run tests successfully. Any changes
+# here will not reflect when CodeCrafters tests your code, and might even cause build
+# failures.
+#
+# DON'T EDIT THIS!
+[dependencies]
+anyhow = "1.0.68"                                # error handling
+bytes = "1.3.0"                                  # helps manage buffers
+thiserror = "1.0.38"                             # error handling

README.md

@@ -0,0 +1,40 @@
+[![progress-banner](https://backend.codecrafters.io/progress/grep/8cfc0bb9-a2ef-4f67-8165-e6e896888d1c)](https://app.codecrafters.io/users/codecrafters-bot?r=2qF)
+
+This is a starting point for Rust solutions to the
+["Build Your Own grep" Challenge](https://app.codecrafters.io/courses/grep/overview).
+
+[Regular expressions](https://en.wikipedia.org/wiki/Regular_expression)
+(Regexes, for short) are patterns used to match character combinations in
+strings. [`grep`](https://en.wikipedia.org/wiki/Grep) is a CLI tool for
+searching using Regexes.
+
+In this challenge you'll build your own implementation of `grep`. Along the way
+we'll learn about Regex syntax, how parsers/lexers work, and how regular
+expressions are evaluated.
+
+**Note**: If you're viewing this repo on GitHub, head over to
+[codecrafters.io](https://codecrafters.io) to try the challenge.
+
+# Passing the first stage
+
+The entry point for your `grep` implementation is in `src/main.rs`. Study and
+uncomment the relevant code, and push your changes to pass the first stage:
+
+```sh
+git add .
+git commit -m "pass 1st stage" # any msg
+git push origin master
+```
+
+Time to move on to the next stage!
+
+# Stage 2 & beyond
+
+Note: This section is for stages 2 and beyond.
+
+1. Ensure you have `cargo (1.62)` installed locally
+1. Run `./your_program.sh` to run your program, which is implemented in
+   `src/main.rs`. This command compiles your Rust project, so it might be slow
+   the first time you run it. Subsequent runs will be fast.
+1. Commit your changes and run `git push origin master` to submit your solution
+   to CodeCrafters. Test output will be streamed to your terminal.

codecrafters.yml

@@ -0,0 +1,11 @@
+# Set this to true if you want debug logs.
+#
+# These can be VERY verbose, so we suggest turning them off
+# unless you really need them.
+debug: false
+
+# Use this to change the Rust version used to run your code
+# on Codecrafters.
+#
+# Available versions: rust-1.77
+language_pack: rust-1.77

src/main.rs

@@ -0,0 +1,34 @@
+use std::env;
+use std::io;
+use std::process;
+
+fn match_pattern(input_line: &str, pattern: &str) -> bool {
+    if pattern.chars().count() == 1 {
+        return input_line.contains(pattern);
+    } else {
+        panic!("Unhandled pattern: {}", pattern)
+    }
+}
+
+// Usage: echo <input_text> | your_program.sh -E <pattern>
+fn main() {
+    // You can use print statements as follows for debugging, they'll be visible when running tests.
+    println!("Logs from your program will appear here!");
+
+    if env::args().nth(1).unwrap() != "-E" {
+        println!("Expected first argument to be '-E'");
+        process::exit(1);
+    }
+
+    let pattern = env::args().nth(2).unwrap();
+    let mut input_line = String::new();
+
+    io::stdin().read_line(&mut input_line).unwrap();
+
+    // Uncomment this block to pass the first stage
+    // if match_pattern(&input_line, &pattern) {
+    //     process::exit(0)
+    // } else {
+    //     process::exit(1)
+    // }
+}

your_program.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+#
+# Use this script to run your program LOCALLY.
+#
+# Note: Changing this script WILL NOT affect how CodeCrafters runs your program.
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit early if any commands fail
+
+# Copied from .codecrafters/compile.sh
+#
+# - Edit this to change how your program compiles locally
+# - Edit .codecrafters/compile.sh to change how your program compiles remotely
+(
+  cd "$(dirname "$0")" # Ensure compile steps are run within the repository directory
+  cargo build --release --target-dir=/tmp/codecrafters-grep-target --manifest-path Cargo.toml
+)
+
+# Copied from .codecrafters/run.sh
+#
+# - Edit this to change how your program runs locally
+# - Edit .codecrafters/run.sh to change how your program runs remotely
+exec /tmp/codecrafters-grep-target/release/grep-starter-rust "$@"