Lab3 by Valentin Chernyshov

.gitignore

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+ipfs*/

submitions/lab3/submition3.md

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+# Lab3
+
+## Task 1
+
+1. try `git cat-file`
+    ![alt text](1.png)
+
+## Task 2
+
+1. make all commits:
+    - file
+    ```
+    First commit
+    Second commit
+    Third commit
+    ```
+    - git status
+    ```
+    On branch master
+    Your branch is ahead of 'origin/master' by 3 commits.
+    (use "git push" to publish your local commits)
+
+    Untracked files:
+    (use "git add <file>..." to include in what will be committed)
+            submitions/lab3/
+    ```
+2. Make soft reset
+    - File
+    ```
+    First commit
+    Second commit
+    Third commit
+    ```
+    - git status
+    ```
+    Your branch is ahead of 'origin/master' by 2 commits.
+    (use "git push" to publish your local commits)
+
+    Changes to be committed:
+    (use "git restore --staged <file>..." to unstage)
+            modified:   file.txt
+
+    Untracked files:
+    (use "git add <file>..." to include in what will be committed)
+            submitions/lab3/
+    ```
+3. Make hard reset
+    - File
+    ```
+    First commit
+    ```
+    - git status
+    ```
+    On branch master
+    Your branch is ahead of 'origin/master' by 1 commit.
+    (use "git push" to publish your local commits)
+
+    Untracked files:
+    (use "git add <file>..." to include in what will be committed)
+            submitions/lab3/
+    ```
+4. make mixed reset (default)
+    - File
+    ```
+    First commit
+    ```
+    - Git status
+    ```
+    On branch master
+    Your branch is up to date with 'origin/master'.
+
+    Untracked files:
+    (use "git add <file>..." to include in what will be committed)
+            file.txt
+            submitions/lab3/
+
+    nothing added to commit but untracked files present (use "git add" to track)
+    ```
+5. `git reflog` (yes it took me 3 attempts)
+![alt text](2.png)
+
+6. `git reset --hard <hash_from_reflog>`
+    - file
+    ```
+    First commit
+    Second commit
+    Third commit
+    ```
+    - git status
+    ```
+    On branch master
+    Your branch is ahead of 'origin/master' by 3 commits.
+    (use "git push" to publish your local commits)
+
+    Untracked files:
+    (use "git add <file>..." to include in what will be committed)
+            submitions/lab3/
+    ```
+7. Explonation
+    - `git reset`: based on experience, use cases `reset` moves the head between the different commits according to the selected mode. From "GIT-RESET(1)" man and based on the output of file/git status, the modes work as follows:
+        - **soft**: just relocate the HEAD with no changes to git storage (index) or local fs (tree)
+        - **mixed** (default): move head to the target commit and update git storage (index) without updating the local fs (tree)
+        - **hard**: move the head to the target commit and update both fit storage (index) and local fs (tree)
+    - `git reflog`: this is the log changes of the current branch hash as it logs all the commits, resets, checkouts, and rebases (if it were only commits and resets, I could have assumed it was a log of all HEAD changes).
+    - `HEAD~<int>` commit relative to the head down (e.g. `HEAD~/HEAD~1` - 1 commit before head, `HEAD~10` 10 commits before head)
+8. Hard reset to HEAD~3 (don't want to keep trash in the repo :))