commit 402c67998d40f9606d2e62a836f90abb8c310855
Author: Ade Attwood <adrian.attwood@marketdojo.com>
Date:   Fri May 10 20:31:52 2024 +0100

    chore: initial commit

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..604ce87
--- /dev/null
+++ b/.github/workflows/ci.yml
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+name: CI
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+  pull_request: { branches: ["0.x"] }
+
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+
+      - name: Set up rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+
+      - name: Lint
+        run: cargo fmt --check
+
+  test:
+    name: Cargo Test
+    runs-on: ubuntu-latest
+    steps:
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+        uses: actions/checkout@v4
+
+      - name: Set up rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Test
+        run: cargo test
diff --git a/.github/workflows/ct-commitlint.yml b/.github/workflows/ct-commitlint.yml
new file mode 100644
index 0000000..39eeeb2
--- /dev/null
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+      - name: Git safe.directory
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+
+      - name: Lint commits
+        run: conventional-tools commitlint
diff --git a/.gitignore b/.gitignore
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index 0000000..ea8c4bf
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+checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..6dcf58d
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "dev_case"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+clap = { version = "4.5.4", features = ["derive"] }
+regex = "1.10.4"
+
+[dev-dependencies]
+cucumber = "0.20"
+futures = "0.3"
+
+[[test]]
+name = "features"
+harness = false
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2d025f5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,21 @@
+<div align="center">
+
+# Dev Case
+
+A regex search and replace tool for preserving case
+
+</div>
+
+## Description
+
+Dev Case is a command-line tool built with Rust that simplifies regex search
+and replace operations while preserving the case of the matched text. It allows
+developers to efficiently manipulate text files while maintaining the original
+casing of the content.
+
+## Features
+
+- **Regex Search and Replace**: Perform search and replace operations using regular expressions.
+- **Case Preservation**: Maintain the original casing of the matched text during replacement.
+- **CLI Interface**: Command-line interface for easy integration into development workflows.
+- **Built with Rust**: Utilizes the performance and safety benefits of the Rust programming language.
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..3da331f
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,42 @@
+use regex::Regex;
+
+pub fn replace(search: &String, replace: String, input: String) -> String {
+    let mut index = 0;
+    let mut output = input;
+    let search_pattern = Regex::new(search).unwrap();
+
+    while let Some(search_match) = search_pattern.find_at(&output, index) {
+        let start = search_match.start();
+        let end = search_match.end();
+
+        let mut replacement = String::new();
+        match search_pattern.captures(&output[start..end]) {
+            Some(captures) => {
+                captures.expand(&replace, &mut replacement);
+            }
+            None => {
+                replacement.push_str(&replace);
+            }
+        };
+
+        index = start + replacement.len();
+        output.replace_range(start..end, &replacement);
+    }
+
+    output
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn runs_the_search_and_replace() {
+        assert_eq!(
+            String::from("foo foo"),
+            super::replace(
+                &String::from(r"\b\w+\b"),
+                String::from("foo"),
+                String::from("bar baz")
+            ),
+        );
+    }
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..1eaafda
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,30 @@
+use clap::Parser;
+use std::io::Read;
+
+#[derive(Parser, Debug)]
+#[command(version, about, long_about = None)]
+struct Args {
+    /// The pattern to search for in your input.
+    #[arg(short, long)]
+    search: String,
+
+    /// The replacement pattern.
+    #[arg(short, long)]
+    replace: String,
+}
+
+fn main() {
+    let args = Args::parse();
+
+    let mut input = String::new();
+    match std::io::stdin().read_to_string(&mut input) {
+        Ok(_) => (),
+        Err(err) => {
+            eprintln!("Error reading from stdin: {}", err);
+            return;
+        }
+    };
+
+    let output = dev_case::replace(&args.search, args.replace, input);
+    print!("{}", output);
+}
diff --git a/tests/features.rs b/tests/features.rs
new file mode 100644
index 0000000..4b8c7bf
--- /dev/null
+++ b/tests/features.rs
@@ -0,0 +1,28 @@
+use cucumber::{given, then, World};
+
+#[derive(Debug, Default, World)]
+pub struct TestWorld {
+    search: String,
+    replace: String,
+    input: String,
+}
+
+#[given(regex = r"^(Search|Replace|Input|Output) is '([^']+)'$")]
+fn set_item(world: &mut TestWorld, input: String, output: String) {
+    match input.as_str() {
+        "Search" => world.search = output,
+        "Replace" => world.replace = output,
+        "Input" => world.input = output,
+        _ => unreachable!(),
+    }
+}
+
+#[then(regex = r"^Output is '([^']+)'$")]
+fn assert_output(world: &mut TestWorld, expected: String) {
+    let actual = dev_case::replace(&world.search, world.replace.clone(), world.input.clone());
+    assert_eq!(actual, expected);
+}
+
+fn main() {
+    futures::executor::block_on(TestWorld::run("tests/features/basic.feature"));
+}
diff --git a/tests/features/basic.feature b/tests/features/basic.feature
new file mode 100644
index 0000000..7e59c25
--- /dev/null
+++ b/tests/features/basic.feature
@@ -0,0 +1,19 @@
+Feature: Basic search and replace
+
+  Scenario: You can do a basic search and replace of words
+    Given Search is 'word'
+    And Replace is 'another'
+    And Input is 'This is a word'
+    Then Output is 'This is a another'
+
+  Scenario: You can do multiple search and replaces
+    Given Search is 'word'
+    And Replace is 'another'
+    And Input is 'This is a word and another word'
+    Then Output is 'This is a another and another another'
+
+  Scenario: You can search and replace with multiple words
+    Given Search is 'another word'
+    And Replace is 'word another'
+    And Input is 'This is a word and another word'
+    Then Output is 'This is a word and word another'