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Where Your Work Lives

You Already Do Version Control
Git: A Time Machine for a Folder
What Git Is (and Is Not)
Getting Git Onto Your Machine
Snapshots, not diffs
The Verbs You Will Keep Using
A Commit Holds Your Whole Folder
One File, Three Moments
Git's Three Areas
What a Commit Really Is
History Is a Graph
Where Your Work Lives
Beads on a Thread

Inside .git: the Object Store

The Prompt Shows Where You Stand
Blobs, Trees, Commits
Content Addressing
A Branch Is Just a Name
HEAD: Where You Are Standing
Inside .git: the Object Store

The Daily Loop

A Timeline Is Born
git init & git clone - Two Ways to Get a Repository
git add & git commit - Saving in Two Steps
git status - What Differs, and Where
git add -p, -A, and . - Choosing What You Stage
git commit -m and -a - The Sealing Controls
git diff - Three Comparisons, One Command
git log - Walking History, Three Lenses
git show - One Commit Under the Lamp
.gitignore - Telling Git What to Leave Alone
git commit --amend - Redo the Last Commit
The Daily Loop
Reading Your Repository

Undo Without Fear

git restore - Put a File Back
restore --staged & --source
git reset - Walk the Branch Back
git revert - Undo by Adding
The Revert Travels With the Merge
git reflog - Where HEAD Has Been
What Git Can Never Bring Back
Undo Without Fear
The Rescue Playbook

Timelines

git branch & git switch: Name First, Move Second
git switch -c and --detach: Two Ways to Move
git checkout: The Old Master Key
Fast-forward: The Merge With No Merge Commit
The Three-Way Merge: One Commit, Two Parents
git log Prints a List. History Is a Graph.
Merge Conflict: Git Asking a Question
Two Panes Compare, Three Panes Rule
The Ruling Desk: Both Moved One Line
Rulings Beyond One Line
git merge Arguments: -m, --no-ff, --abort
Rebase vs Merge: Two Endings for a Stale Desk
git rebase --onto: The Transplant
Pull Request = Merge Request
Timelines
How Merging Works

Remote Repositories

git remote - Naming the Server Copy
git fetch: The Mail Arrives, Held
git fetch vs git pull - Look First, Then File It In
git pull: Fetch, Then File It In
git push - The Refusal Is Protection
git push --force-with-lease - The Safer Force
The Pull Request Loop - Branch, Push, Review, Merge
"Your Branch Is Behind" - Behind and Ahead, Decoded
Remote Repositories
The Collaboration Loop

The Sharp Tools

git cherry-pick - Copy One Commit's Change
git bisect - Find the Breaking Commit by Halving
git stash - Park Half-Done Work
git tag - A Name That Does Not Advance
git rebase -i - Rewrite a Run of Commits
The Sharp Tools

Reading a Merge Conflict

The Merge View: Three Panes, One Ruling
Merge Conflicts Have Shapes
Reading Conflict Markers
Resolving: Four Moves, One Exit Door
The Rebase Flip: ours Is Not Yours
A Clean Merge Can Still Be Wrong
Reverting a Merge: the Dead End
Never Resolve on the Release Line
Reading a Merge Conflict
Merging on a Team

Repository Archaeology

Your IDE's History Views Are Git Queries
git log Can Answer for One File - Even Across a Rename
log A..B Asks the Graph. diff A B Compares Snapshots.
git blame: Who Last Touched Every Line
Compare Any Two Moments, Any Time
Back-Merge, Forward-Merge: Two Directions
Repository Archaeology

Choosing Your Strategy

Git Flow - Five Lanes, Fixed Jobs
Trunk-Based - One Line, Tiny Branches
Release Branches - Supporting Old Versions
Stabilization Flow - Bugfix vs Hotfix
Choosing a Branching Strategy
Choosing Your Strategy

One Archive, Many Desks

Worktrees - The Practice Run
One Archive, Many Desks

Reference

The House Words
What This Course Did NOT Cover
The Whole Course on One Line
Reading the Manual - the Decoder Ring

Topics/Git/Repository Archaeology

beginnerFree

Repository Archaeology

five questions history answers - who, when, which lines, which commits, what changed

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Your IDE's History Views Are Git Queries

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git log Can Answer for One File - Even Across a Rename

git log Can Answer for One File - Even Across a Rename

-- <path> narrows the walk to one file's story; --follow keeps the story through renames

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log A..B Asks the Graph. diff A B Compares Snapshots.

log A..B Asks the Graph. diff A B Compares Snapshots.

log ranges select COMMITS by reachability; diff ignores everything between and compares two endpoints

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git blame: Who Last Touched Every Line

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one commit id, author, and date stamped in the margin of each line - computed from history on demand

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