v0.6.0

Fix clippy warnings with latest stable
Update ~everything
2025-10-09 21:50:54 +02:00 · 2025-07-03 22:23:52 +02:00 · 2025-07-03 22:21:49 +02:00 · 2025-07-03 22:13:05 +02:00 · 2024-09-14 13:06:58 +02:00 · 2024-09-01 14:14:22 +00:00
16 changed files with 1292 additions and 132 deletions
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@ -0,0 +1,16 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      # Check for updates to GitHub Actions every week
+      interval: "weekly"
--- a/.github/workflows/build_deb.yml
+++ b/.github/workflows/build_deb.yml
@ -0,0 +1,19 @@
+on: workflow_dispatch
+
+name: Build packages
+
+jobs:
+  build_deb:
+    name: Build .deb package
+    runs-on: ubuntu-latest
+    env:
+      RUSTFLAGS: "-C strip=debuginfo"
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo install cargo-deb
+      - run: cargo build --release
+      - run: cargo deb
+      - uses: actions/upload-artifact@v4
+        with:
+          path: target/debian/*.deb
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -0,0 +1,53 @@
+on:
+  - push
+  - workflow_dispatch
+
+name: CI
+
+jobs:
+  lint_and_test:
+    name: lint and test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy, rustfmt
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo clippy --all-features -- -D warnings
+      - run: cargo check --workspace --all-features
+      - run: cargo test --all-targets
+      - run: cargo fmt --all -- --check
+
+  build_package:
+    needs: lint_and_test
+    if: ${{ github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/heads/build-') }}
+    name: Build package
+    env:
+      RUSTFLAGS: "-C strip=debuginfo"
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          # - windows-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: stable
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo build --release
+      - name: prepare release artifact
+        shell: bash
+        run: |
+          mkdir -p target/{bin,man}
+          cp target/release/*.1 target/man
+          cp target/release/git-{mob,solo,{add,edit,delete}-coauthor} target/bin
+      - uses: actions/upload-artifact@v4
+        with:
+          name: git-mob-${{ matrix.os }}
+          path: |
+            target/bin
+            target/man
--- a/Cargo.lock
+++ b/Cargo.lock
@ -1,120 +1,367 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 4
+
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+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "r-efi"
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+
+[[package]]
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 [[package]]
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 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
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+checksum = "5f0e2c6ed6606019b4e29e69dbaba95b11854410e5347d525002456dbbb786b6"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]

 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
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+checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
 dependencies = [
 "itoa",
+ "memchr",
 "ryu",
 "serde",
 ]

+[[package]]
+name = "shlex"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
+
 [[package]]
 name = "smallvec"
-version = "1.4.0"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7cb5678e1615754284ec264d9bb5b4c27d2018577fd90ac0ceb578591ed5ee4"
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 [[package]]
-name = "unicode-bidi"
-version = "0.3.4"
+name = "stable_deref_trait"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
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+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
+[[package]]
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+
+[[package]]
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+checksum = "17b6f705963418cdb9927482fa304bc562ece2fdd4f616084c50b7023b435a40"
 dependencies = [
- "matches",
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
 ]

 [[package]]
-name = "unicode-normalization"
-version = "0.1.12"
+name = "synstructure"
+version = "0.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
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+checksum = "728a70f3dbaf5bab7f0c4b1ac8d7ae5ea60a4b5549c8a5914361c99147a709d2"
 dependencies = [
- "smallvec",
+ "proc-macro2",
+ "quote",
+ "syn",
 ]

+[[package]]
+name = "tinystr"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d4f6d1145dcb577acf783d4e601bc1d76a13337bb54e6233add580b07344c8b"
+dependencies = [
+ "displaydoc",
+ "zerovec",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
+
 [[package]]
 name = "url"
-version = "2.1.1"
+version = "2.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "829d4a8476c35c9bf0bbce5a3b23f4106f79728039b726d292bb93bc106787cb"
+checksum = "32f8b686cadd1473f4bd0117a5d28d36b1ade384ea9b5069a1c40aefed7fda60"
 dependencies = [
+ "form_urlencoded",
 "idna",
- "matches",
 "percent-encoding",
 ]

 [[package]]
-name = "vcpkg"
-version = "0.2.8"
+name = "utf8_iter"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fc439f2794e98976c88a2a2dafce96b930fe8010b0a256b3c2199a773933168"
+checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
+
+[[package]]
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+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
+
+[[package]]
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+checksum = "9683f9a5a998d873c0d21fcbe3c083009670149a8fab228644b8bd36b2c48cb3"
+dependencies = [
+ "wit-bindgen-rt",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
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+checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
+
+[[package]]
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+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
+
+[[package]]
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+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
+
+[[package]]
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+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
+
+[[package]]
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+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
+
+[[package]]
+name = "windows_x86_64_msvc"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[package]]
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+version = "0.39.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "writeable"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea2f10b9bb0928dfb1b42b65e1f9e36f7f54dbdf08457afefb38afcdec4fa2bb"
+
+[[package]]
+name = "yoke"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f41bb01b8226ef4bfd589436a297c53d118f65921786300e427be8d487695cc"
+dependencies = [
+ "serde",
+ "stable_deref_trait",
+ "yoke-derive",
+ "zerofrom",
+]
+
+[[package]]
+name = "yoke-derive"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38da3c9736e16c5d3c8c597a9aaa5d1fa565d0532ae05e27c24aa62fb32c0ab6"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zerofrom"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50cc42e0333e05660c3587f3bf9d0478688e15d870fab3346451ce7f8c9fbea5"
+dependencies = [
+ "zerofrom-derive",
+]
+
+[[package]]
+name = "zerofrom-derive"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zerotrie"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36f0bbd478583f79edad978b407914f61b2972f5af6fa089686016be8f9af595"
+dependencies = [
+ "displaydoc",
+ "yoke",
+ "zerofrom",
+]
+
+[[package]]
+name = "zerovec"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a05eb080e015ba39cc9e23bbe5e7fb04d5fb040350f99f34e338d5fdd294428"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b96237efa0c878c64bd89c436f661be4e46b2f3eff1ebb976f7ef2321d2f58f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
--- a/Cargo.toml
+++ b/Cargo.toml
@ -1,11 +1,44 @@
 [package]
-name = "git_mob"
-version = "0.1.0"
-authors = ["Martin Frost <martin@frost.ws>"]
+name = "git-mob"
+version = "0.6.0"
+authors = [ "Martin Frost <martin@frost.ws>" ]
 edition = "2018"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+description = "A CLI tool for social coding."
+license = "MIT"
+homepage = "https://github.com/Frost/git-mob"
+repository = "https://github.com/Frost/git-mob"
+readme = "README.md"

 [dependencies]
-git2 = "0.13"
+git2 = { version = "0.19", default-features = false }
+serde = { version =  "1.0", features = ["derive"] }
 serde_json = "1.0"
+clap = { version = "~4.5", features = ["derive"] }
+clap_mangen = "~0.2"
+env_home = "0.1.0"
+
+[build-dependencies]
+clap_mangen = "~0.2"
+clap = { version = "~4.5", features = ["derive"]}
+clap_complete = "~4.5"
+
+[package.metadata.deb]
+name = "git-mob"
+revision = "1"
+section = "vcs"
+priority = "optional"
+extended-description = """\
+A set of git subcommands for including co-authors to your git commits."""
+assets = [
+    ["target/release/git-mob", "usr/bin/", "755"],
+    ["target/release/git-solo", "usr/bin/", "755"],
+    ["target/release/git-add-coauthor", "usr/bin/", "755"],
+    ["target/release/git-edit-coauthor", "usr/bin/", "755"],
+    ["target/release/git-delete-coauthor", "usr/bin/", "755"],
+    ["target/release/git-mob.1", "usr/share/man/man1/", "644"],
+    ["target/release/git-solo.1", "usr/share/man/man1/", "644"],
+    ["target/release/git-add-coauthor.1", "usr/share/man/man1/", "644"],
+    ["target/release/git-edit-coauthor.1", "usr/share/man/man1/", "644"],
+    ["target/release/git-delete-coauthor.1", "usr/share/man/man1/", "644"],
+    ["README.md", "usr/share/doc/git-mob/README", "644"],
+]
--- a/README.md
+++ b/README.md
@ -0,0 +1,110 @@
+# Git-mob
+
+> A command-line tool for social coding
+
+---
+
+This is a CLI tool for including your co-authors in your commits.
+
+It is essentially a Rust clone of the [git-mob NPM package](https://www.npmjs.com/package/git-mob).
+
+## Install
+
+### MacOS
+
+If you have [Homebrew](https://brew.sh) installed, you can install `git-mob` using my tap:
+
+    brew install frost/tap/git-mob
+
+Otherwise, see the section on binary packages
+
+### Binary packages for MacOS, Ubuntu, and Windows
+
+Download the [latest release](https://github.com/Frost/git-mob/releases/latest) and extract it somewhere so that the binaries end up in your `$PATH`.
+
+### From source
+
+Just run `cargo install git_mob` and you should be all set.
+
+## A note on commit template and git-mob
+
+`git-mob` _will_ currently override any existing `commit.template` setting
+in any project where it is run. It does this in order to ensure that `git
+commit` will pick up your current mob.
+
+The future plan is to do something a bit smarter, like first detecting if the
+repo already has a `commit.template` setting, and in that case, modify the
+existing template by adding `Co-authored-by:` trailers to it, or something
+similar.
+
+
+## Examples
+
+* Add Alice, Bob, and yourself as a possible co-authors:
+
+      git add-coauthor a "Alice" alice@example.com
+      git add-coauthor b "bob" Bob@example.com
+      git add-coauthor me "me" myself.i@example.com
+
+* Set Alice as co-author, making your mob consist of you and Alice:
+
+      git mob a
+
+* Set both Alice and Bob as co-authors, making your mob consist of the three of you:
+
+      git mob a b
+
+* Set Alice as the main author for any commits you make, since she is the one
+  doing most of the thinking anyway, and add yourself as a mob member:
+
+      git mob -o a b me
+
+* Edit Bob's name, since you accidentally capitalized his email instead of his name:
+
+      git edit-coauthor b --name "Bob" --email bob@example.com
+
+* Remove Bob as a possible co-author:
+
+      git delete-coauthor b
+
+* List all available co-authors:
+
+      git mob -l
+
+* Go back to coding by yourself again:
+
+      git solo
+
+
+## Working features
+
+* `git mob <co-author-initials>`
+* `git add-coauthor <initials> "Co-author Name" <co-author-email-address>`
+* `git -o <initials>` for overwriting the main author
+* `git edit-coauthor [--name "Co-author Name"] [--email <co-author-email-address>]`
+* `git delete-coauthor <initials>`
+* `git mob -l`
+* `git solo`
+
+
+## TODO
+
+There are some missing features from the original NPM package, that are yet to
+be implemented, and then there is also a severe lack of tests and documentation.
+
+
+### Missing features
+
+* `git mob-print`
+* `git suggest-coauthors`
+* `--installTemplate` and `--uninstallTemplate` for prepare-commit-msg
+
+
+## Why clone an existing, working CLI tool?
+
+Basically, I was looking for some decent size project to write in Rust, and I
+didn't have any other ideas.
+
+The NPM package works just fine. There's just one thing that annoys me about it,
+and that is that I have to install it in once for every node version that is
+used in any repo I work in. With this approach, I only need to install it once.
--- a/build.rs
+++ b/build.rs
@ -0,0 +1,31 @@
+use clap::CommandFactory;
+use clap_mangen::Man;
+use std::env;
+use std::path::Path;
+
+#[path = "src/cli.rs"]
+mod cli;
+
+macro_rules! generate_manpage {
+    ($struct:ident) => {
+        let target_dir = env::var("CARGO_TARGET_DIR").unwrap_or("target".to_string());
+        let output_dir = Path::new(&target_dir).join(env::var("PROFILE").unwrap());
+
+        let cmd = cli::$struct::command();
+        let cmd_name = format!("{}.1", cmd.get_name());
+        let man = Man::new(cmd);
+        let mut buffer: Vec<u8> = Default::default();
+        man.render(&mut buffer)?;
+        std::fs::write(output_dir.join(cmd_name), buffer)?;
+    };
+}
+
+fn main() -> std::io::Result<()> {
+    generate_manpage!(GitMob);
+    generate_manpage!(GitSolo);
+    generate_manpage!(GitAddCoauthor);
+    generate_manpage!(GitEditCoauthor);
+    generate_manpage!(GitDeleteCoauthor);
+
+    Ok(())
+}
--- a/flake.lock
+++ b/flake.lock
@ -0,0 +1,75 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1678901627,
+        "narHash": "sha256-U02riOqrKKzwjsxc/400XnElV+UtPUQWpANPlyazjH0=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "93a2b84fc4b70d9e089d029deacc3583435c2ed6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "naersk": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1671096816,
+        "narHash": "sha256-ezQCsNgmpUHdZANDCILm3RvtO1xH8uujk/+EqNvzIOg=",
+        "owner": "nix-community",
+        "repo": "naersk",
+        "rev": "d998160d6a076cfe8f9741e56aeec7e267e3e114",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1670507980,
+        "narHash": "sha256-riNZa0xzM1it3pzxciwALeMs+0CsBMWIW2FqulzK8vM=",
+        "path": "/nix/store/2i8zqmz2cqa0grjagw94z7g47199db9k-source",
+        "rev": "2787fc7d1e51404678614bf0fe92fc296746eec0",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1678875422,
+        "narHash": "sha256-T3o6NcQPwXjxJMn2shz86Chch4ljXgZn746c2caGxd8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "126f49a01de5b7e35a43fd43f891ecf6d3a51459",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "naersk": "naersk",
+        "nixpkgs": "nixpkgs_2"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
--- a/flake.nix
+++ b/flake.nix
@ -0,0 +1,24 @@
+{
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    naersk.url = "github:nix-community/naersk";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  };
+
+  outputs = { self, flake-utils, naersk, nixpkgs }:
+    {
+      overlays.default = (final: prev:
+        let naersk' = final.callPackage naersk { };
+        in { git-mob = naersk'.buildPackage { src = ./.; }; });
+    } // flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = (import nixpkgs) {
+          inherit system;
+          overlays = [ self.overlays.default ];
+        };
+      in rec {
+        defaultPackage = pkgs.git-mob;
+        devShell =
+          pkgs.mkShell { nativeBuildInputs = with pkgs; [ rustc cargo ]; };
+      });
+}
--- a/src/bin/git-add-coauthor.rs
+++ b/src/bin/git-add-coauthor.rs
@ -0,0 +1,15 @@
+use clap::Parser;
+use git_mob::{cli, parse_coauthors_file, write_coauthors_file, Author};
+
+fn main() {
+    let opt = cli::GitAddCoauthor::parse();
+    let mut authors = parse_coauthors_file().unwrap_or_default();
+    let new_author = Author {
+        name: opt.name,
+        email: opt.email,
+    };
+
+    authors.insert(opt.initials, new_author);
+
+    write_coauthors_file(authors);
+}
--- a/src/bin/git-delete-coauthor.rs
+++ b/src/bin/git-delete-coauthor.rs
@ -0,0 +1,9 @@
+use clap::Parser;
+use git_mob::{cli, get_available_coauthors, write_coauthors_file};
+
+fn main() {
+    let opt = cli::GitDeleteCoauthor::parse();
+    let mut authors = get_available_coauthors();
+    authors.remove(&opt.initials);
+    write_coauthors_file(authors);
+}
--- a/src/bin/git-edit-coauthor.rs
+++ b/src/bin/git-edit-coauthor.rs
@ -0,0 +1,22 @@
+use clap::Parser;
+use git_mob::{cli, get_available_coauthors, write_coauthors_file, Author};
+use std::process;
+
+fn main() {
+    let opt = cli::GitDeleteCoauthor::parse();
+
+    let mut authors = get_available_coauthors();
+
+    if let Some(author) = authors.get(&opt.initials) {
+        let mut updated_author: Author = author.clone();
+        updated_author.name = opt.name;
+        updated_author.email = opt.email;
+
+        authors.insert(opt.initials, updated_author);
+
+        write_coauthors_file(authors);
+    } else {
+        eprintln!("No author found with initials {}", &opt.initials);
+        process::exit(1);
+    };
+}
--- a/src/bin/git-mob.rs
+++ b/src/bin/git-mob.rs
@ -0,0 +1,79 @@
+use clap::Parser;
+use git_mob::{
+    cli, ensure_commit_template_is_set, get_available_coauthors, get_main_author, set_main_author,
+    with_gitmessage_template_path_or_exit, Author,
+};
+use std::fmt::Write;
+use std::fs;
+use std::process;
+
+fn main() {
+    let args = cli::GitMob::parse();
+
+    if args.list {
+        list_coauthors();
+        process::exit(0);
+    }
+
+    if let Some(initials) = args.overwrite {
+        override_main_author(&initials);
+    }
+
+    write_coauthors_to_gitmessage_file(&args.coauthors);
+    ensure_commit_template_is_set();
+}
+
+fn list_coauthors() {
+    for (abbrev, author) in &get_available_coauthors() {
+        println!("{abbrev}\t{author}");
+    }
+}
+
+fn override_main_author(initials: &str) {
+    let all_authors = get_available_coauthors();
+    match all_authors.get(initials) {
+        Some(new_main_author) => set_main_author(new_main_author),
+        None => {
+            eprintln!("Error: author with initials {initials} not found");
+            process::exit(1);
+        }
+    }
+}
+
+fn write_coauthors_to_gitmessage_file(coauthor_initials: &[String]) {
+    let coauthors = select_coauthors(coauthor_initials);
+    let mut content = String::from("\n\n");
+    for author in &coauthors {
+        _ = writeln!(content, "Co-authored-by: {}", &author.to_string());
+    }
+
+    with_gitmessage_template_path_or_exit(|path| match fs::write(path, content) {
+        Ok(_) => {
+            println!("{}", get_main_author());
+            for author in &coauthors {
+                println!("{author}");
+            }
+        }
+        Err(e) => {
+            eprintln!("Error writing to .gitmessage template: {e}");
+            process::exit(1);
+        }
+    });
+}
+
+fn select_coauthors(coauthor_initials: &[String]) -> Vec<Author> {
+    let all_coauthors = get_available_coauthors();
+    let mut coauthors: Vec<Author> = Vec::new();
+
+    for initial in coauthor_initials {
+        match all_coauthors.get(initial) {
+            Some(coauthor) => coauthors.push(coauthor.clone()),
+            None => {
+                eprintln!("Error: author with initials {initial} not found");
+                process::exit(1);
+            }
+        }
+    }
+
+    coauthors
+}
--- a/src/bin/git-solo.rs
+++ b/src/bin/git-solo.rs
@ -1,32 +1,16 @@
+use clap::Parser;
+use git_mob::{
+    cli, ensure_commit_template_is_set, get_main_author, with_gitmessage_template_path_or_exit,
+};
 use std::fs::File;
-use std::process;
-use git2::{Config, Repository};

 fn main() {
-    println!("{}", get_main_author());
+    let _opt = cli::GitSolo::parse();
+    let main_author = get_main_author();
+    println!("{main_author}");

-    match Repository::open_from_env() {
-        Ok(repo) => {
-            truncate_gitmessage_template(repo);
-        }
-        Err(_e) => {
-            eprintln!("Not in a git repository");
-            process::exit(1);
-        }
-    }
-}
-
-fn get_main_author() -> String {
-    let cfg = Config::open_default().unwrap();
-    let name = cfg.get_entry("user.name").unwrap();
-    let name = name.value().unwrap();
-    let email = cfg.get_entry("user.email").unwrap();
-    let email = email.value().unwrap();
-
-    format!("{} <{}>", name, email)
-}
-
-fn truncate_gitmessage_template(repo: Repository) {
-    let template_path = repo.path().join(".gitmessage");
-    let _template = File::create(template_path);
+    with_gitmessage_template_path_or_exit(|path| {
+        let _template = File::create(path);
+    });
+    ensure_commit_template_is_set();
 }
--- a/src/cli.rs
+++ b/src/cli.rs
@ -0,0 +1,56 @@
+use clap::Parser;
+
+#[derive(Parser, Debug)]
+#[clap(version, name = "git-mob")]
+/// Assemble a group of co-authors to help you on your coding quest
+pub struct GitMob {
+    /// Prints list of available co-authors
+    #[clap(short, long)]
+    pub list: bool,
+    /// Overwrite the main author
+    #[clap(short, long)]
+    pub overwrite: Option<String>,
+    /// A list of co-author initials
+    pub coauthors: Vec<String>,
+}
+
+#[derive(Parser, Debug)]
+#[clap(name = "git-add-coauthor", version)]
+/// Add a co-author to your list of available co-authors
+pub struct GitAddCoauthor {
+    /// Co-author initials
+    pub initials: String,
+    /// The name of the co-author, in quotes, e.g. "Foo Bar"
+    pub name: String,
+    /// The email of the co-author
+    pub email: String,
+}
+
+#[derive(Parser, Debug)]
+#[clap(name = "git-edit-coauthor", version)]
+/// Edit a co-author in your list of available co-authors
+pub struct GitEditCoauthor {
+    /// Co-author initials
+    pub initials: String,
+    /// The name of the co-author, in quotes, e.g. "Foo Bar"
+    pub name: String,
+    /// The email of the co-author
+    pub email: String,
+}
+
+#[derive(Parser, Debug)]
+#[clap(name = "git-delete-coauthor", version)]
+/// Delete a co-author from your list of available co-authors
+pub struct GitDeleteCoauthor {
+    /// Co-author initials
+    pub initials: String,
+    /// The name of the co-author, in quotes, e.g. "Foo Bar"
+    pub name: String,
+    /// The email of the co-author
+    pub email: String,
+}
+
+#[derive(Parser, Debug)]
+#[clap(name = "git-solo", version)]
+/// Disband the mob and continue working solo.
+pub struct GitSolo {}
--- a/src/lib.rs
+++ b/src/lib.rs
@ -0,0 +1,118 @@
+use env_home::env_home_dir as home_dir;
+use git2::{Config, Repository};
+use serde::{Deserialize, Serialize};
+use std::collections::BTreeMap;
+use std::fmt;
+use std::fs;
+
+use std::error::Error;
+use std::fs::File;
+use std::io::BufReader;
+use std::process;
+use std::string::String;
+
+pub mod cli;
+
+#[derive(Serialize, Deserialize, Clone, Debug)]
+pub struct Author {
+    pub name: String,
+    pub email: String,
+}
+
+impl fmt::Display for Author {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{} <{}>", self.name, self.email)
+    }
+}
+
+pub fn get_main_author() -> Author {
+    let cfg = match Repository::open_from_env() {
+        Ok(repo) => repo.config().unwrap(),
+        Err(_e) => Config::open_default().unwrap(),
+    };
+
+    let name = cfg.get_entry("user.name").unwrap();
+    let email = cfg.get_entry("user.email").unwrap();
+
+    Author {
+        name: name.value().unwrap().to_string(),
+        email: email.value().unwrap().to_string(),
+    }
+}
+
+pub fn set_main_author(author: &Author) {
+    with_git_repo_or_exit(|repo| {
+        let mut config = repo.config().unwrap();
+        config.set_str("user.name", &author.name).unwrap();
+        config.set_str("user.email", &author.email).unwrap();
+    });
+}
+
+pub fn ensure_commit_template_is_set() {
+    with_git_repo_or_exit(|repo| {
+        let mut config = repo.config().unwrap();
+        let template_path = repo.path().join(".gitmessage");
+        if let Some(template_path) = template_path.to_str() {
+            config.set_str("commit.template", template_path).unwrap();
+        }
+    })
+}
+
+pub fn get_available_coauthors() -> BTreeMap<String, Author> {
+    match parse_coauthors_file() {
+        Ok(coauthors) => coauthors,
+        Err(e) => {
+            eprintln!("{e:?}");
+            BTreeMap::new()
+        }
+    }
+}
+
+pub fn parse_coauthors_file() -> Result<BTreeMap<String, Author>, Box<dyn Error>> {
+    let coauthors_path = coauthors_file_path();
+    let coauthors_file = File::open(coauthors_path)?;
+    let reader = BufReader::new(coauthors_file);
+
+    let json_data: serde_json::Value = serde_json::from_reader(reader)?;
+
+    match json_data.get("coauthors") {
+        Some(coauthors) => Ok(serde_json::from_value(coauthors.clone()).unwrap()),
+        None => Ok(BTreeMap::new()),
+    }
+}
+
+fn with_git_repo_or_exit<F: FnOnce(Repository)>(f: F) {
+    match Repository::open_from_env() {
+        Ok(repo) => {
+            f(repo);
+        }
+        Err(_e) => {
+            eprintln!("Not in a git repository");
+            process::exit(1);
+        }
+    }
+}
+
+pub fn with_gitmessage_template_path_or_exit<F: FnOnce(std::path::PathBuf)>(f: F) {
+    with_git_repo_or_exit(|repo| {
+        let path = repo.path().join(".gitmessage");
+        f(path);
+    })
+}
+
+pub fn write_coauthors_file(authors: BTreeMap<String, Author>) {
+    let mut wrapper_tree = BTreeMap::new();
+    wrapper_tree.insert("coauthors", authors);
+    let json_data = serde_json::to_string_pretty(&wrapper_tree).unwrap();
+    match fs::write(coauthors_file_path(), json_data) {
+        Ok(_) => {}
+        Err(e) => {
+            eprintln!("Error writing git-coauthors file: {e:?}");
+            process::exit(1);
+        }
+    }
+}
+
+fn coauthors_file_path() -> std::path::PathBuf {
+    home_dir().unwrap().join(".git-coauthors")
+}