diff options
Diffstat (limited to 'src/modules/git_status.rs')
-rw-r--r-- | src/modules/git_status.rs | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/modules/git_status.rs b/src/modules/git_status.rs new file mode 100644 index 000000000..453edd9a5 --- /dev/null +++ b/src/modules/git_status.rs @@ -0,0 +1,133 @@ +use ansi_term::Color; +use git2::{Repository, Status}; + +use super::{Context, Module}; + +/// Creates a segment with the Git branch in the current directory +/// +/// Will display the branch name if the current directory is a git repo +/// By default, the following symbols will be used to represent the repo's status: +/// - `=` – This branch has merge conflicts +/// - `⇡` – This branch is ahead of the branch being tracked +/// - `⇡` – This branch is behind of the branch being tracked +/// - `⇕` – This branch has diverged from the branch being tracked +/// - `?` — There are untracked files in the working directory +/// - `$` — A stash exists for the repository +/// - `!` — There are file modifications in the working directory +/// - `+` — A new file has been added to the staging area +/// - `»` — A renamed file has been added to the staging area +/// - `✘` — A file's deletion has been added to the staging area +pub fn segment(context: &Context) -> Option<Module> { + // This is the order that the sections will appear in + const GIT_STATUS_CONFLICTED: &str = "="; + const GIT_STATUS_AHEAD: &str = "⇡"; + const GIT_STATUS_BEHIND: &str = "⇣"; + const GIT_STATUS_DIVERGED: &str = "⇕"; + const GIT_STATUS_UNTRACKED: &str = "?"; + const GIT_STATUS_STASHED: &str = "$"; + const GIT_STATUS_MODIFIED: &str = "!"; + const GIT_STATUS_ADDED: &str = "+"; + const GIT_STATUS_RENAMED: &str = "»"; + const GIT_STATUS_DELETED: &str = "✘"; + + let branch_name = context.branch_name.as_ref()?; + let repo_root = context.repo_root.as_ref()?; + let repository = Repository::open(repo_root).ok()?; + + let module_style = Color::Red.bold(); + let mut module = Module::new("git_status"); + module.get_prefix().set_value("[").set_style(module_style); + module.get_suffix().set_value("] ").set_style(module_style); + module.set_style(module_style); + + let ahead_behind = get_ahead_behind(&repository, &branch_name); + log::debug!("Repo ahead/behind: {:?}", ahead_behind); + let stash_object = repository.revparse_single("refs/stash"); + log::debug!("Stash object: {:?}", stash_object); + let repo_status = get_repo_status(&repository); + log::debug!("Repo status: {:?}", repo_status); + + // Add the conflicted segment + if let Ok(repo_status) = repo_status { + if repo_status.is_conflicted() { + module.new_segment("conflicted", GIT_STATUS_CONFLICTED); + } + } + + // Add the ahead/behind segment + if let Ok((ahead, behind)) = ahead_behind { + if ahead > 0 && behind > 0 { + module.new_segment("diverged", GIT_STATUS_DIVERGED); + } else if ahead > 0 { + module.new_segment("ahead", GIT_STATUS_AHEAD); + } else if behind > 0 { + module.new_segment("behind", GIT_STATUS_BEHIND); + } + } + + // Add the stashed segment + if stash_object.is_ok() { + module.new_segment("stashed", GIT_STATUS_STASHED); + } + + // Add all remaining status segments + if let Ok(repo_status) = repo_status { + if repo_status.is_wt_deleted() || repo_status.is_index_deleted() { + module.new_segment("deleted", GIT_STATUS_DELETED); + } + + if repo_status.is_wt_renamed() || repo_status.is_index_renamed() { + module.new_segment("renamed", GIT_STATUS_RENAMED); + } + + if repo_status.is_wt_modified() { + module.new_segment("modified", GIT_STATUS_MODIFIED); + } + + if repo_status.is_index_modified() || repo_status.is_index_new() { + module.new_segment("staged", GIT_STATUS_ADDED); + } + + if repo_status.is_wt_new() { + module.new_segment("untracked", GIT_STATUS_UNTRACKED); + } + } + + if module.is_empty() { + None + } else { + Some(module) + } +} + +/// Gets the bitflags associated with the repo's git status +fn get_repo_status(repository: &Repository) -> Result<Status, git2::Error> { + let mut status_options = git2::StatusOptions::new(); + status_options.include_untracked(true); + + let repo_file_statuses = repository.statuses(Some(&mut status_options))?; + + // Statuses are stored as bitflags, so use BitOr to join them all into a single value + let repo_status: Status = repo_file_statuses.iter().map(|e| e.status()).collect(); + if repo_status.is_empty() { + return Err(git2::Error::from_str("Repo has no status")); + } + + Ok(repo_status) +} + +/// Compares the current branch with the branch it is tracking to determine how +/// far ahead or behind it is in relation +fn get_ahead_behind( + repository: &Repository, + branch_name: &str, +) -> Result<(usize, usize), git2::Error> { + let branch_object = repository.revparse_single(branch_name)?; + let tracking_branch_name = format!("{}@{{upstream}}", branch_name); + let tracking_object = repository.revparse_single(&tracking_branch_name)?; + + let branch_oid = branch_object.id(); + let tracking_oid = tracking_object.id(); + + repository.graph_ahead_behind(branch_oid, tracking_oid) +} |