feat: added the ability to walk through trees

src/commands/version.rs

@@ -1,10 +1,12 @@
+use crate::trees::get_tree_skip;
+use crate::versions::VersionBump;
 use anyhow::Result;
 use clap::Parser;
 use conventional_commit::ConventionalCommit;
 use git2::{Oid, Repository};
 use semver::Version;
 use semver_bump_trait::SemverBump;
-use slog::{debug, info};
+use slog::{debug, info, warn};
 use std::cmp::Ordering;
 use std::collections::HashMap;
 use std::str::FromStr;
@@ -15,14 +17,6 @@ use crate::tags::get_tag_map;
 #[derive(Debug, Parser)]
 pub struct VersionCommand {}
 
-#[derive(Debug, Clone, PartialOrd, PartialEq)]
-enum VersionBump {
-    None = 0,
-    Patch = 1,
-    Minor = 2,
-    Major = 3,
-}
-
 impl VersionCommand {
     pub async fn run(&self, log: slog::Logger) -> Result<()> {
         // Figure out the path we're searching and which one we found.
@@ -79,10 +73,7 @@ impl VersionCommand {
                 // First check to see if we have a version for this commit.
                 info!(
                     log,
-                    "    checking oid {:?}, bump {:?}, depth {}",
-                    oid,
-                    bump,
-                    depth
+                    "checking oid {:?}, bump {:?}, depth {}", oid, bump, depth
                 );
 
                 if let Some(tag_version) = &tag_map.get(&oid) {
@@ -124,10 +115,6 @@ impl VersionCommand {
                 let message = commit.message().unwrap_or("");
                 let conv = ConventionalCommit::from_str(message)?;
                 let commit_bump = self.get_version_bump(&conv);
-                let new_bump = match &bump > &commit_bump {
-                    true => bump.clone(),
-                    false => commit_bump.clone(),
-                };
 
                 let commit = &repo.find_commit(oid)?;
                 let parent_count = commit.parent_count();
@@ -135,17 +122,39 @@ impl VersionCommand {
                 debug!(log, "commit {:?}", commit.id());
                 debug!(log, "message {:?}", message);
                 debug!(log, "type {:?}", conv.type_());
+
+                // See what files were changed by this commit. If there is no
+                // bump, then we don't have to do this step at all.
+                let tree_skip =
+                    get_tree_skip(log.clone(), &repo, &commit, &commit_bump)?;
+
+                let new_bump = match tree_skip {
+                    true => {
+                        debug!(log, "no bump");
+                        bump
+                    }
+                    false => {
+                        let tree_bump = match &bump > &commit_bump {
+                            true => bump.clone(),
+                            false => commit_bump.clone(),
+                        };
+
                         debug!(
                             log,
                             "bump {:?} + {:?} -> {:?}",
                             &bump,
                             &commit_bump,
-                    new_bump
+                            tree_bump
                         );
-                debug!(log, "        parent_count {:?}", parent_count);
+
+                        tree_bump
+                    }
+                };
 
                 // Since we haven't found a tag, insert the entry into the new
                 // list.
+                debug!(log, "parent_count {:?}", parent_count);
+
                 for parent in commit.parent_ids() {
                     debug!(log, "parent {:?}", parent);
                     check_list.push((parent, new_bump.clone(), depth + 1));

src/main.rs

@@ -7,6 +7,8 @@ use clap::Parser;
 
 mod commands;
 mod tags;
+mod trees;
+mod versions;
 
 #[tokio::main]
 async fn main() {

src/trees.rs

@@ -0,0 +1,48 @@
+use anyhow::Result;
+use git2::{Commit, DiffOptions, Repository};
+use slog::{debug, warn, Logger};
+
+use crate::versions::VersionBump;
+
+pub fn get_tree_skip(
+    log: Logger,
+    repo: &Repository,
+    commit: &Commit,
+    commit_bump: &VersionBump,
+) -> Result<bool> {
+    // If we aren't bumping, then there is no reason to check.
+    if commit_bump == &VersionBump::None {
+        debug!(log, "no version bump, skipping tree");
+        return Ok(true);
+    }
+
+    // Get the tree.
+    let commit_tree = commit.tree()?;
+
+    debug!(log, "checking tree {:?}", &commit_tree.id());
+
+    // Go through the parents so we can get a difference.
+    for parent in commit.parent_ids() {
+        // Get the parent information.
+        let parent_commit = &repo.find_commit(parent)?;
+        let parent_tree = parent_commit.tree()?;
+
+        // Get the difference with the parents.
+        let mut opts = DiffOptions::new();
+        let diff = repo.diff_tree_to_tree(
+            Some(&commit_tree),
+            Some(&parent_tree),
+            Some(&mut opts),
+        )?;
+        let deltas = diff.deltas();
+
+        for delta in deltas {
+            let old_file_path = delta.old_file().path().unwrap();
+            let new_file_path = delta.new_file().path().unwrap();
+            debug!(log, "old file {:?}", old_file_path);
+            debug!(log, "new file {:?}", new_file_path);
+        }
+    }
+
+    Ok(false)
+}

src/versions.rs

@@ -0,0 +1,7 @@
+#[derive(Debug, Clone, PartialOrd, PartialEq)]
+pub enum VersionBump {
+    None = 0,
+    Patch = 1,
+    Minor = 2,
+    Major = 3,
+}