Flag to use the program as a hook

Cargo.toml

@@ -6,6 +6,8 @@ homepage = "https://github.com/alt-art/commit"
 repository = "https://github.com/alt-art/commit"
 documentation = "https://github.com/alt-art/commit/wiki"
 description = "A tool to make patterned (conventional) commit messages"
+categories = ["development-tools", "command-line-utilities"]
+keywords = ["git", "commit","message", "conventional"]
 authors = ["Pedro H. M. <[email protected]>"]
 readme = "README.md"
 license = "MIT"

src/commit.rs

@@ -0,0 +1,55 @@
+use anyhow::{anyhow, Result};
+
+use std::fs;
+use std::io::Write;
+use std::path::PathBuf;
+use std::process::{exit, Command};
+
+pub fn commit_as_hook(commit_message: &str) -> Result<()> {
+    let output = Command::new("git")
+        .args(&["rev-parse", "--absolute-git-dir"])
+        .output();
+    match output {
+        Ok(output) => {
+            if !output.status.success() {
+                return Err(anyhow!("Could not get git directory"));
+            }
+            let git_dir = PathBuf::from(String::from_utf8_lossy(&output.stdout).trim());
+            let commit_file_path = git_dir.join("COMMIT_EDITMSG");
+            fs::write(commit_file_path, commit_message)?;
+        }
+        Err(e) => {
+            return Err(anyhow!(
+                "Failed to run git. Make sure git is installed\nAdditional info: {}",
+                e
+            ));
+        }
+    }
+    Ok(())
+}
+
+pub fn commit(commit_message: &str) -> Result<()> {
+    let output = Command::new("git")
+        .arg("commit")
+        .arg("-m")
+        .arg(commit_message)
+        .output();
+    match output {
+        Ok(output) => {
+            std::io::stdout().write_all(&output.stdout)?;
+            std::io::stderr().write_all(&output.stderr)?;
+            exit(
+                output
+                    .status
+                    .code()
+                    .ok_or(anyhow!("Could not get exit code"))?,
+            );
+        }
+        Err(e) => {
+            return Err(anyhow::anyhow!(
+                "Failed to run git. Make sure git is installed\nAdditional info: {}",
+                e
+            ));
+        }
+    };
+}

src/main.rs

@@ -7,14 +7,15 @@
 )]
 #![allow(clippy::module_name_repetitions)]
 
+mod commit;
 mod commit_message;
 mod config;
 
 use anyhow::Result;
 use clap::Parser;
 use std::io::Write;
+
 use std::path::PathBuf;
-use std::process::{exit, Command};
 
 use commit_message::make_message_commit;
 
@@ -32,6 +33,8 @@ struct Opt {
     config: Option<PathBuf>,
     #[clap(long, help = "Init custom configuration file")]
     init: bool,
+    #[clap(short, long, help = "Use as hook")]
+    hook: bool,
 }
 
 fn main() -> Result<()> {
@@ -45,28 +48,17 @@ fn main() -> Result<()> {
     if opt.init {
         let mut file = std::fs::File::create("commit.json")?;
         file.write_all(DEFAULT_CONFIG_FILE.as_bytes())?;
-        Ok(())
-    } else {
-        let pattern = config::get_pattern(opt.config)?;
-        let commit_message = make_message_commit(pattern)?;
+        return Ok(());
+    }
 
-        let output = Command::new("git")
-            .arg("commit")
-            .arg("-m")
-            .arg(commit_message)
-            .output();
-        match output {
-            Ok(output) => {
-                std::io::stdout().write_all(&output.stdout).unwrap();
-                std::io::stderr().write_all(&output.stderr).unwrap();
-                exit(output.status.code().unwrap());
-            }
-            Err(e) => {
-                return Err(anyhow::anyhow!(
-                    "Failed to run git. Make sure git is installed\nAdditional info: {}",
-                    e
-                ));
-            }
-        };
+    let pattern = config::get_pattern(opt.config)?;
+    let commit_message = make_message_commit(pattern)?;
+
+    if opt.hook {
+        commit::commit_as_hook(&commit_message)?;
+        return Ok(());
     }
+
+    commit::commit(&commit_message)?;
+    Ok(())
 }