134 lines
5.0 KiB
Rust
134 lines
5.0 KiB
Rust
use ansi_term::Color;
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use git2::{Repository, Status};
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use super::{Context, Module};
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/// Creates a module with the Git branch in the current directory
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///
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/// Will display the branch name if the current directory is a git repo
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/// By default, the following symbols will be used to represent the repo's status:
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/// - `=` – This branch has merge conflicts
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/// - `⇡` – This branch is ahead of the branch being tracked
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/// - `⇣` – This branch is behind of the branch being tracked
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/// - `⇕` – This branch has diverged from the branch being tracked
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/// - `?` — There are untracked files in the working directory
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/// - `$` — A stash exists for the local repository
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/// - `!` — There are file modifications in the working directory
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/// - `+` — A new file has been added to the staging area
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/// - `»` — A renamed file has been added to the staging area
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/// - `✘` — A file's deletion has been added to the staging area
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pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
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// This is the order that the sections will appear in
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const GIT_STATUS_CONFLICTED: &str = "=";
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const GIT_STATUS_AHEAD: &str = "⇡";
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const GIT_STATUS_BEHIND: &str = "⇣";
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const GIT_STATUS_DIVERGED: &str = "⇕";
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const GIT_STATUS_UNTRACKED: &str = "?";
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const GIT_STATUS_STASHED: &str = "$";
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const GIT_STATUS_MODIFIED: &str = "!";
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const GIT_STATUS_ADDED: &str = "+";
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const GIT_STATUS_RENAMED: &str = "»";
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const GIT_STATUS_DELETED: &str = "✘";
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let branch_name = context.branch_name.as_ref()?;
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let repo_root = context.repo_root.as_ref()?;
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let repository = Repository::open(repo_root).ok()?;
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let module_style = Color::Red.bold();
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let mut module = context.new_module("git_status")?;
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module.get_prefix().set_value("[").set_style(module_style);
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module.get_suffix().set_value("] ").set_style(module_style);
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module.set_style(module_style);
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let ahead_behind = get_ahead_behind(&repository, &branch_name);
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log::debug!("Repo ahead/behind: {:?}", ahead_behind);
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let stash_object = repository.revparse_single("refs/stash");
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log::debug!("Stash object: {:?}", stash_object);
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let repo_status = get_repo_status(&repository);
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log::debug!("Repo status: {:?}", repo_status);
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// Add the conflicted segment
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if let Ok(repo_status) = repo_status {
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if repo_status.is_conflicted() {
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module.new_segment("conflicted", GIT_STATUS_CONFLICTED);
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}
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}
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// Add the ahead/behind segment
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if let Ok((ahead, behind)) = ahead_behind {
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if ahead > 0 && behind > 0 {
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module.new_segment("diverged", GIT_STATUS_DIVERGED);
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} else if ahead > 0 {
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module.new_segment("ahead", GIT_STATUS_AHEAD);
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} else if behind > 0 {
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module.new_segment("behind", GIT_STATUS_BEHIND);
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}
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}
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// Add the stashed segment
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if stash_object.is_ok() {
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module.new_segment("stashed", GIT_STATUS_STASHED);
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}
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// Add all remaining status segments
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if let Ok(repo_status) = repo_status {
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if repo_status.is_wt_deleted() || repo_status.is_index_deleted() {
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module.new_segment("deleted", GIT_STATUS_DELETED);
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}
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if repo_status.is_wt_renamed() || repo_status.is_index_renamed() {
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module.new_segment("renamed", GIT_STATUS_RENAMED);
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}
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if repo_status.is_wt_modified() {
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module.new_segment("modified", GIT_STATUS_MODIFIED);
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}
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if repo_status.is_index_modified() || repo_status.is_index_new() {
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module.new_segment("staged", GIT_STATUS_ADDED);
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}
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if repo_status.is_wt_new() {
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module.new_segment("untracked", GIT_STATUS_UNTRACKED);
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}
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}
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if module.is_empty() {
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None
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} else {
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Some(module)
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}
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}
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/// Gets the bitflags associated with the repo's git status
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fn get_repo_status(repository: &Repository) -> Result<Status, git2::Error> {
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let mut status_options = git2::StatusOptions::new();
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status_options.include_untracked(true);
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let repo_file_statuses = repository.statuses(Some(&mut status_options))?;
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// Statuses are stored as bitflags, so use BitOr to join them all into a single value
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let repo_status: Status = repo_file_statuses.iter().map(|e| e.status()).collect();
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if repo_status.is_empty() {
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return Err(git2::Error::from_str("Repo has no status"));
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}
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Ok(repo_status)
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}
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/// Compares the current branch with the branch it is tracking to determine how
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/// far ahead or behind it is in relation
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fn get_ahead_behind(
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repository: &Repository,
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branch_name: &str,
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) -> Result<(usize, usize), git2::Error> {
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let branch_object = repository.revparse_single(branch_name)?;
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let tracking_branch_name = format!("{}@{{upstream}}", branch_name);
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let tracking_object = repository.revparse_single(&tracking_branch_name)?;
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let branch_oid = branch_object.id();
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let tracking_oid = tracking_object.id();
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repository.graph_ahead_behind(branch_oid, tracking_oid)
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}
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