init: gig, because gitignores are boring

.envrc

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+use flake

.gitignore

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+### Rust ###
+# 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
+
+# Generated by cargo mutants
+# Contains mutation testing data
+**/mutants.out*/
+
+# RustRover
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+### End of Rust ###
+
+### Nix ###
+# Ignore build outputs from performing a nix-build or `nix build` command
+result
+result-*
+
+# Ignore automatically generated direnv output
+.direnv
+### End of Nix ###
+

Cargo.toml

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+[package]
+name = "gig"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+anyhow = "1.0.101"
+clap = { version = "4.5.57", features = ["derive"] }
+dialoguer = "0.12.0"
+directories = "6.0.0"
+figlet-rs = "0.1.5"
+git2 = "0.20.4"
+glob = "0.3.3"
+indicatif = "0.18.3"
+tracing = "0.1.44"
+tracing-subscriber = "0.3.22"

README.md

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+# `gig` - the .gitignore cli
+
+no docs yet, sorry

flake.lock

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+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1769996383,
+        "narHash": "sha256-AnYjnFWgS49RlqX7LrC4uA+sCCDBj0Ry/WOJ5XWAsa0=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "57928607ea566b5db3ad13af0e57e921e6b12381",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "import-tree": {
+      "locked": {
+        "lastModified": 1763762820,
+        "narHash": "sha256-ZvYKbFib3AEwiNMLsejb/CWs/OL/srFQ8AogkebEPF0=",
+        "owner": "vic",
+        "repo": "import-tree",
+        "rev": "3c23749d8013ec6daa1d7255057590e9ca726646",
+        "type": "github"
+      },
+      "original": {
+        "owner": "vic",
+        "repo": "import-tree",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1770562336,
+        "narHash": "sha256-ub1gpAONMFsT/GU2hV6ZWJjur8rJ6kKxdm9IlCT0j84=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "d6c71932130818840fc8fe9509cf50be8c64634f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1769909678,
+        "narHash": "sha256-cBEymOf4/o3FD5AZnzC3J9hLbiZ+QDT/KDuyHXVJOpM=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "72716169fe93074c333e8d0173151350670b824c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "import-tree": "import-tree",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "A very basic flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    import-tree.url = "github:vic/import-tree";
+  };
+
+  outputs = inputs:
+    inputs.flake-parts.lib.mkFlake {inherit inputs;}
+    (inputs.import-tree ./packages/nix);
+}

packages/nix/package.nix

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+{...}: {
+  perSystem = {pkgs, ...}: {
+    packages.gig = pkgs.rustPlatform.buildRustPackage {
+      pname = "gig";
+      version = "v0.0.1";
+
+      src = ../..;
+      cargoLock.lockFile = ../../Cargo.lock;
+
+      buildInputs = with pkgs; [
+        openssl
+        libgit2
+      ];
+
+      nativeBuildInputs = with pkgs; [pkg-config];
+    };
+  };
+}

packages/nix/shell.nix

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+{...}: {
+  perSystem = {pkgs, ...}: {
+    devShells.default = pkgs.mkShell {
+      packages = with pkgs; [
+        cargo
+        pkg-config
+        openssl
+        libgit2
+      ];
+    };
+  };
+}

packages/nix/systems.nix

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+{...}: {
+  systems = [
+    "x86_64-linux"
+  ];
+}

src/lib.rs

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+use clap::Parser;
+use git2::Repository;
+use glob::MatchOptions;
+use indicatif::ProgressBar;
+use tracing::{info, warn};
+use std::path::{Path, PathBuf};
+use std::time::Duration;
+use directories::ProjectDirs;
+use anyhow::{Result, Context};
+
+const GITIGNORE_URL: &str = "https://git.teesh.dev/many/gitignore";
+
+#[derive(Parser)]
+pub struct Args {
+    #[arg(required = true, num_args = 1..)]
+    pub templates: Vec<String>
+}
+
+pub struct GitignoreRepo {
+    path: PathBuf
+}
+
+pub struct Gitignore {
+    pub language: String,
+    pub text: String
+}
+
+impl GitignoreRepo {
+    // NOTE: This is only declared due to ::new() being a standard in
+    //       the Rust ecosystem. This is really just an alias to `fetch_or_load`.
+    pub fn new() -> Result<Self> {
+        Self::initialize()
+    }
+
+    fn fetch_and_return(into: &Path) -> Result<Self> {
+        let pb = ProgressBar::new_spinner();
+        pb.set_message(format!("Cloning from {}...", GITIGNORE_URL));
+        pb.enable_steady_tick(Duration::from_millis(100));
+
+        Repository::clone(GITIGNORE_URL, into)
+            .with_context(|| format!("Failed to clone `.gitignore` repo into {}", into.display()))?;
+
+        pb.finish_and_clear();
+        
+        info!("Cloned from {}", GITIGNORE_URL);
+
+        Ok(Self { path: into.into() })
+    }
+
+    fn initialize() -> Result<Self> {
+        let dirs: ProjectDirs = ProjectDirs::from("dev", "teesh", "gig")
+            .with_context(|| "ProjectDirs couldn't be initialized. Are you sure you have $HOME?")?;
+
+        if !dirs.data_dir().is_dir() {
+            warn!(".gitignore directory does not exist! Fetching...");
+            return Self::fetch_and_return(dirs.data_dir());
+        }
+
+        Ok(Self { path: dirs.data_dir().into() })
+    }
+
+    pub fn find(&self, name: String) -> Vec<String> {
+        let pattern = format!("{}/**/{}*.gitignore", self.path.display(), name);
+
+        let options = MatchOptions {
+            case_sensitive: false,
+            require_literal_separator: false,
+            require_literal_leading_dot: false
+        };
+
+        glob::glob_with(&pattern, options)
+            .map(|paths| {
+                paths
+                    .filter_map(|entry| entry.ok())
+                    .filter_map(|path| path.to_str().map(String::from))
+                    .collect()
+            })
+            .unwrap_or_default()
+    }
+}
+
+// This function works like the following:
+// get_lang_from_file_name(".../Python.gitignore") -> "Python"
+// get_lang_from_file_name(".../Rails.Ruby.gitignore") -> "Rails.Ruby"
+// get_lang_from_file_name(".../Anything Goes.gitignore") -> "Anything goes"
+// get_lang_from_file_name(".../even.chinese") -> "even"
+pub fn get_lang_from_file_name(filename: String) -> String {
+    Path::new(&filename)
+        .file_stem()
+        .and_then(|s| s.to_str())
+        .unwrap_or(&filename)
+        .to_string()
+}

src/main.rs

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+use figlet_rs::FIGfont;
+
+use gig::{Args, Gitignore, GitignoreRepo, get_lang_from_file_name};
+use clap::Parser;
+use anyhow::{Result, Context};
+use dialoguer::Select;
+use tracing::{warn, info};
+
+fn print_header() {
+    let standard_font = FIGfont::standard().unwrap();
+    let figure = standard_font.convert("gig");
+
+    if let Some(output) = figure {
+        println!("{}", output);
+    }
+}
+
+fn merge_gitignores(gitignores: Vec<Gitignore>) -> String {
+    let mut merged = String::new();
+
+    for gitignore in gitignores {
+        merged += format!("### {} ###\n", gitignore.language).as_str();
+        merged += gitignore.text.as_str();
+        merged += format!("### End of {} ###\n", gitignore.language).as_str();
+        merged += "\n";
+    }
+
+    merged
+}
+
+fn main() -> Result<()> {
+    tracing_subscriber::fmt()
+        .with_max_level(tracing::Level::INFO)
+        .with_target(false)
+        .with_ansi(true)
+        .init();
+
+    print_header();
+
+    let args = Args::parse();
+    let repository: GitignoreRepo = GitignoreRepo::new()?;
+
+    let mut used: Vec<String> = vec![];
+    for template in args.templates {
+        let possible: Vec<String> = repository.find(template.clone());
+
+        let chose: String;
+        if possible.len() > 1 {
+            let selection: usize = Select::new()
+                .with_prompt(format!("Which template do you mean by {}?", template))
+                .items(&possible)
+                .interact()
+                .with_context(|| "Failed to do a `Select` prompt.")?;
+
+            chose = possible[selection].clone();
+        } else if possible.is_empty() {
+            warn!("No template found for {}! Skipping...", template);
+            continue;
+        } else {
+            chose = possible[0].clone();
+        }
+
+        used.push(chose);
+    }
+
+    let gitignores: Vec<Gitignore> = used
+        .into_iter()
+        .filter_map(|path| {
+            let text = std::fs::read_to_string(&path).ok()?;
+            let language = get_lang_from_file_name(path);
+            Some(Gitignore { language, text })
+        })
+        .collect();
+
+    let names: Vec<String> = gitignores.iter().map(|g| g.language.clone()).collect();
+    let merged = merge_gitignores(gitignores);
+
+    std::fs::write(".gitignore", &merged)
+        .with_context(|| "Failed to write to .gitignore")?;
+
+    let names: Vec<&str> = names.iter().map(|s| s.as_str()).collect();
+    let summary = match names.as_slice() {
+        [] => String::new(),
+        [a] => a.to_string(),
+        [a, b] => format!("{} and {}", a, b),
+        [rest @ .., last] => format!("{}, and {}", rest.join(", "), last),
+    };
+    info!("Created a .gitignore file with {}", summary);
+
+    Ok(())
+}