a vague plan, outlined in todos

Author: obmarg

src/main.rs

@@ -1,3 +1,33 @@
 fn main() {
  println!("Hello, world!");
+
+ // TODO: Things what need to be done:
+ // 1. Get the projects that have changed
+ // - Get files that have changed
+ // - If main branch this is diff from HEAD^
+ // - If PR this is merge-base between current branch & PR base branch
+ // - If not PR but not main probably just do merge-base between current branch & main
+ // - Take this and map to cargo proejcts
+ // 2. Get deps that have changed
+ // - Open & read lockfile
+ // - Open & read lockfile in base commit, where-ever that is.
+ // (Possibly using github API for this, not sure)
+ // - Diff the dependencies somehow? Not entirely sure how
+ // 3. Combine the outputs from 1 & 2 somehow
+ // 4. Use this to generate a list of projects that have directly changed
+ // 5. Use that + a graph of deps to find projects that have been impacted
+ // 6. Possibly also use that to find binary targets that have been impacted
+
+ // Implementation plan:
+ // Step 1 is trivial, unsurprising and easy to fake so skip it for now and take input
+ // Step 2:
+ // - Probably do need the comparison code but could skip doing git things for now?
+ // Step 3-6 probably essential.
+
+ // Testing plan
+ // Ideally I want to see how effective this would be by looking at previous builds?
+ // - Fetch PRs,
+ // - Feed data for each PR in
+ // - Need some way of measuring how much effort could be saved?
+ // Maybe # of deps changed vs the total, graphed or something?
 }