Initial commit

This commit is contained in:
Eli
2023-06-07 22:58:20 +07:00
committed by GitHub
commit 706b1d8b4f
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version: 2
updates:
- package-ecosystem: "github-actions"
directory: "/"
schedule:
interval: "monthly"

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# Resources
- [Learning resources](learning-resources.md)
- [Documentation references](doc-references_.md)
- [Past work](past-work.md)

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# Resources
- [Learning resources](learning-resources.md)
- [Documentation references](doc-references__.md)
- [Past work](past-work.md)

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# GIVEN:
- User opens \_sidebar.md file
# WHEN:
- User navigates by clicking on [Documentation references] link
# THEN (EXPECTED):
- [Documentation references] page must be open successfully
# OBSERVED:
- File not found error OR GitHub reports HTTP 404 error (file not found)

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# GIVEN:
- User opens \_sidebar.md file
# WHEN:
- User navigates by clicking on [Documentation references] link
# THEN (EXPECTED):
- [Documentation references] page must be open successfully
# OBSERVED:
- File not found error OR GitHub reports HTTP 404 error (file not found)

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0

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<!-- readme -->

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<!--
<<< Author notes: Step 1 >>>
Choose 3-5 steps for your course.
The first step is always the hardest, so pick something easy!
Link to docs.github.com for further explanations.
Encourage users to open new tabs for steps!
-->
## Step 1: Resolve duplicate issues
_Welcome to the course :tada:_
GitHub has special capabilities to help reference other information on GitHub. For example, when you reference another issue or pull request by number, that number will be hyperlinked. At the same time, a cross-reference is created in the linked issue or pull request. This two-way reference helps people track the relationship of information across GitHub.
![a screenshot of an issue linking to a PR, and a PR with a cross-reference to the issue](https://user-images.githubusercontent.com/6351798/172456846-2daec570-08b0-4ffa-a7cb-41acc50b836e.png)
With collaboraration from multiple team members, sometimes issues can be duplicated. In the above example, the new issue `#8346` is a duplicate of a previous issue `#8249`. The cross-reference ability allows you to track these duplications and close issues when appropriate.
### Creating references
When you link to another issue, a reference within GitHub is automatically created. In fact, you don't even need to include the full link. If you were to type `#5` within a comment, that would turn into a link to issue or pull request number 5.
When you want to create a crosslink, start typing the title of an issue or pull request directly after you type the `#` symbol. GitHub will suggest issues or pull requests that will link to the right place. To learn even more, check out the [Autolinked References and URLs](https://docs.github.com/en/articles/autolinked-references-and-urls) article.
### :keyboard: Activity: Find and close the cross-linked issue
1. Navigate to the issue #1 (Welcome)
2. Type "Duplicate of #2" as a comment and close issue #1
3. Wait about 20 seconds then refresh this page (the one you're following instructions from). [GitHub Actions](https://docs.github.com/en/actions) will automatically update to the next step.

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<!--
<<< Author notes: Step 2 >>>
Start this step by acknowledging the previous step.
Define terms and link to docs.github.com.
-->
## Step 2: Find a commit in history
_Thanks for the duplicate note :wave:_
An important part of version control is the ability to look into the past. By using `git blame`, and finding the story behind a commit, we're able to do more than _blame_ people for code. We're able to see the story around why a commit was made. What is the associated pull request? Who approved the pull request? What tests were run on that commit before it was merged?
The obvious reason to find things in history is to know about the history. With issues and pull requests, we see a more complete story about the history, not just the bare minimum.
### What's `git blame`?
`git blame` is a Git functionality that shows what revision and author last modified each line of a file. Information like who made a commit, when, and even why can be found this way. If you aren't sure who introduced certain changes to a file, you can use `git blame` to find out. While `git blame` sounds rather accusatory, this can be used to understand the context around decisions.
### What's a Secure Hash Algorithm (SHA)?
A SHA is a reference to a specific object. In this case, it's a reference to a commit. On GitHub, you can look at a specific commit to see the changes introduced, by whom, and if they were a part of a pull request.
### :keyboard: Activity: Find commit in history
1. Navigate to the Code tab of your repository
- _Tip: you may have previously created your repository in a new tab_
2. Click `docs` to navigate into the `/docs` directory
3. Click `_sidebar.md` to view the file
4. On the top of the file, click **Blame** to see the details of the most recent revision
5. Click the commit message, `add sidebar to documentation` to see the commit details
6. Copy the first seven characters of the SHA (the first 7 characters of the 40 character hexadecimal string listed after `commit`)
7. Comment on issue #2 by adding the SHA from step 6 as a comment text and click on "Comment" button
8. Wait about 20 seconds then refresh this page (the one you're following instructions from). [GitHub Actions](https://docs.github.com/en/actions) will automatically update to the next step.

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<!--
<<< Author notes: Step 3 >>>
Start this step by acknowledging the previous step.
Define terms and link to docs.github.com.
-->
## Step 3: Fix a broken sidebar
_Great job finding that commit :heart:_
Thanks for finding that commit! We now know that the sidebar was indeed added, and it was done in that commit. Let's see if we can dig a little deeper to find out if any planning or conversation, using comments, occurred around this change.
As we've already seen, conversations in issues and pull requests can reference other work, but the amount of context goes much further than crosslinks. Remember, Git is version control! For example, the commit that you found in the last step is connected with much more information such as:
- Who made the commit.
- What other changes were included.
- When the commit was made.
- Which pull request the commit was a part of.
The pull request is important because it goes beyond knowing when a commit happened. You can know _why_ a commit happened. Finding history is not about _blaming_ anyone, but about seeing the bigger picture. Why were decisions made? Who was involved? What were the build outputs and test results for each commit? Who requested changes, and who approved them?
### Finding a pull request from a commit
When you're looking at a commit on GitHub, you can see a lot of information. From this view, you can also find a link to the pull request in which the commit was created. We'll use this in the next step.
![screenshot of a view of a commit on GitHub, highlighting the link to the pull request](https://user-images.githubusercontent.com/16547949/67341250-3edbb480-f4fd-11e9-805a-6bce5a8ba2d1.png)
### :keyboard: Activity: Fix a broken sidebar
1. In the main branch [Edit the `docs/_sidebar.md` file](/docs/_sidebar.md).
2. Correct the spelling of the reference `(doc-references__.md)` on line 4 by changing it into `(doc-references.md)`.
3. Select or create a new branch `fix-sidebar` for this commit and start a pull request.
4. Make sure that **main** is selected for **base:** and **fix-sidebar** for **compare:**.
5. Using the **Assignees** section on the right side, assign yourself to the pull request.
6. In the PR comment add 'Closes #2' and autolink issue #2.
7. Click **Create pull request** and wait about 20 seconds.
8. Merge this pull request.
9. Delete the branch 'fix-sidebar'.
10. Wait about 20 seconds then refresh this page (the one you're following instructions from). [GitHub Actions](https://docs.github.com/en/actions) will automatically update to the next step.

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<!--
<<< Author notes: Finish >>>
Review what we learned, ask for feedback, provide next steps.
-->
## Finish
_Congratulations friend, you've completed this course! :tada:_
<img src=https://octodex.github.com/images/collabocats.jpg alt=celebrate width=300 align=right>
In this course, you've learned a lot about finding and sharing information. Within a GitHub repository, you can find history about what changes were made, and more importantly, _why_ changes were made.
### What's next?
You can enable GitHub Pages and see `docs/index.html` as a website!
1. Replace `USERNAME` with your GitHub username and `REPONAME` with your GitHub repository name in `docs/index.html`.
1. Under your repository name at the upper right, click :gear: **Settings**.
1. Then on the lower left, click **Pages**.
1. In the **GitHub Pages** section, select `main` in the **Select branch** drop-down menu and `/docs` in the **Select folder** drop-down menu.
1. Click the **Save** button.
1. Wait about 30 seconds then refresh the page. When you see "Your site is published at ...," you can click on the link to see your published site.
Check out these resources to learn more or get involved:
- Are you a student? Check out the [Student Developer Pack](https://education.github.com/pack).
- [Take another GitHub Skills course](https://github.com/skills).
- [Read the GitHub Getting Started docs](https://docs.github.com/en/get-started).
- To find projects to contribute to, check out [GitHub Explore](https://github.com/explore).

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name: Step 0, Welcome
# This step listens for the learner pushing a commit to `main`.
# This workflow updates from step 0 to step 1.
# This will run every time we push a commit to `main`.
# Reference: https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows
on:
workflow_dispatch:
push:
branches:
- main
permissions:
contents: write
pull-requests: write
issues: write
jobs:
# Get the current step to only run the main job when the learner is on the same step.
get_current_step:
name: Check current step number
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v3
- id: get_step
run: |
echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
outputs:
current_step: ${{ steps.get_step.outputs.current_step }}
on_start:
name: On start
needs: get_current_step
# We will only run this action when:
# 1. This repository isn't the template repository.
# 2. The step is currently 0.
# Reference: https://docs.github.com/en/actions/learn-github-actions/contexts
# Reference: https://docs.github.com/en/actions/learn-github-actions/expressions
if: >-
${{ !github.event.repository.is_template
&& needs.get_current_step.outputs.current_step == 0 }}
# We'll run Ubuntu for performance instead of Mac or Windows.
runs-on: ubuntu-latest
steps:
# We'll need to check out the repository so that we can edit the README.
- name: Checkout
uses: actions/checkout@v3
with:
fetch-depth: 0 # Let's get all the branches.
# This is required to establish related issues
# after being created from the template repository.
- name: Prepare issues
run: |
echo "Make sure we are on step 0"
if [ "$(cat .github/steps/-step.txt)" != 0 ]
then
echo "Current step is not 0"
exit 0
fi
echo "Create issue #1 from file"
gh issue create --title "Welcome" -F .github/files/issue01.md
echo "Create issue #2 from file"
gh issue create --title "Fix the sidebar" -F .github/files/issue02.md
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
# This is required to create a relevant history for docs/_sidebar.md
# after being created from the template repository.
- name: Prepare files history
run: |
echo "Make sure we are on step 0"
if [ "$(cat .github/steps/-step.txt)" != 0 ]
then
echo "Current step is not 0"
exit 0
fi
git config user.name github-actions
git config user.email github-actions@github.com
git checkout main
echo "Update _sidebar.md for the 1st time"
cp -f .github/files/_sidebar01.md docs/_sidebar.md
git add docs/_sidebar.md
git commit -m "updated _sidebar.md"
git push
echo "update _sidebar.md for the 2nd time"
cp -f .github/files/_sidebar02.md docs/_sidebar.md
git add docs/_sidebar.md
git commit -m "add sidebar to documentation"
git push
echo "preserve the commit shaw"
git log --all --oneline | grep "add sidebar to documentation" | cut -c 1-7 >> .github/files/SIDEBARCOMMIT
git add .github/files/SIDEBARCOMMIT
git commit -m "created SIDEBARCOMMIT"
git push
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
# Update README from step 0 to step 1.
- name: Update to step 1
uses: skills/action-update-step@v2
with:
token: ${{ secrets.GITHUB_TOKEN }}
from_step: 0
to_step: 1

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name: Step 1, Resolve duplicate issues
# This step listens for the learner creating or editing an issue comment.
# This workflow updates from step 1 to step 2.
# This will run every time we create or edit an issue comment.
# Reference: https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows
on:
workflow_dispatch:
issue_comment:
types: [created, edited]
permissions:
# Need `contents: read` to checkout the repository.
# Need `contents: write` to update the step metadata.
contents: write
jobs:
# Get the current step to only run the main job when the learner is on the same step.
get_current_step:
name: Check current step number
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v3
- id: get_step
run: |
echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
outputs:
current_step: ${{ steps.get_step.outputs.current_step }}
on_duplicate_issue_closed:
name: Check if duplicate issue is marked as duplicate
needs: get_current_step
# We will only run this action when:
# 1. This repository isn't the template repository.
# 2. The step is currently 1.
# Reference: https://docs.github.com/en/actions/learn-github-actions/contexts
# Reference: https://docs.github.com/en/actions/learn-github-actions/expressions
if: >-
${{ !github.event.repository.is_template
&& needs.get_current_step.outputs.current_step == 1 }}
# We'll run Ubuntu for performance instead of Mac or Windows.
runs-on: ubuntu-latest
steps:
# We'll need to check out the repository so that we can edit the README.
- name: Checkout
uses: actions/checkout@v3
with:
fetch-depth: 0 # Let's get all the branches.
- name: Dump GitHub comment context
id: github_comment_step
run: echo '${{ toJSON(github.event.comment) }}'
- name: Dump GitHub issue context
id: github_issue_step
run: echo '${{ toJSON(github.event.issue) }}'
- name: Check if commented issue is closed and marked as duplicate
if: ${{ contains(github.event.comment.body, 'Duplicate of') && (github.event.issue.state == 'closed')}}
run: echo 'Duplicate issue closed'
# Update README from step 1 to step 2.
- name: Update to step 2
uses: skills/action-update-step@v2
with:
token: ${{ secrets.GITHUB_TOKEN }}
from_step: 1
to_step: 2

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name: Step 2, Find a commit in history
# This step listens for the learner creating or editing an issue comment.
# This workflow updates from step 2 to step 3.
# This will run every time we create or edit an issue comment.
# Reference: https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows
on:
workflow_dispatch:
issue_comment:
types: [created, edited]
permissions:
# Need `contents: read` to checkout the repository.
# Need `contents: write` to update the step metadata.
contents: write
jobs:
# Get the current step to only run the main job when the learner is on the same step.
get_current_step:
name: Check current step number
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v3
- id: get_step
run: |
echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
outputs:
current_step: ${{ steps.get_step.outputs.current_step }}
on_fix_the_sidebar_issue_comment:
name: Check if the issue comment is referencing the correct commit ID
needs: get_current_step
# We will only run this action when:
# 1. This repository isn't the template repository.
# 2. The step is currently 2.
# Reference: https://docs.github.com/en/actions/learn-github-actions/contexts
# Reference: https://docs.github.com/en/actions/learn-github-actions/expressions
if: >-
${{ !github.event.repository.is_template
&& needs.get_current_step.outputs.current_step == 2 }}
# We'll run Ubuntu for performance instead of Mac or Windows.
runs-on: ubuntu-latest
steps:
# We'll need to check out the repository so that we can edit the README.
- name: Checkout
uses: actions/checkout@v3
with:
fetch-depth: 0 # Let's get all the branches.
- name: Dump GitHub comment context
id: github_comment_step
run: echo '${{ toJSON(github.event.comment) }}'
- name: Dump GitHub issue context
id: github_issue_step
run: echo '${{ toJSON(github.event.issue) }}'
- name: Check if the issue comment is referencing the required commit ID
if: contains(github.event.comment.body, needs.find_commit_id.outputs.find_commit_id)
run: echo 'Found the reference to required commit in the comment'
# Update README from step 2 to step 3.
- name: Update to step 3
uses: skills/action-update-step@v2
with:
token: ${{ secrets.GITHUB_TOKEN }}
from_step: 2
to_step: 3

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name: Step 3, Fix a broken sidebar
# This step listens for the learner opening, editing, or reopening a pull request.
# This workflow updates from step 3 to step X.
# This will run every time we open, edit, or reopen the pull request.
# Reference: https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows
on:
workflow_dispatch:
pull_request:
types: [opened, edited, reopened]
permissions:
# Need `contents: read` to checkout the repository.
# Need `contents: write` to update the step metadata.
contents: write
jobs:
# Get the current step to only run the main job when the learner is on the same step.
get_current_step:
name: Check current step number
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v3
- id: get_step
run: |
echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
outputs:
current_step: ${{ steps.get_step.outputs.current_step }}
on_fix_the_sidebar_pr_body:
name: Check if the PR body is containing the correct closing message
needs: get_current_step
# We will only run this action when:
# 1. This repository isn't the template repository.
# 2. The step is currently 3.
# Reference: https://docs.github.com/en/actions/learn-github-actions/contexts
# Reference: https://docs.github.com/en/actions/learn-github-actions/expressions
if: >-
${{ !github.event.repository.is_template
&& needs.get_current_step.outputs.current_step == 3 }}
# We'll run Ubuntu for performance instead of Mac or Windows.
runs-on: ubuntu-latest
steps:
# We'll need to check out the repository so that we can edit the README.
- name: Checkout
uses: actions/checkout@v3
with:
fetch-depth: 0 # Let's get all the branches.
- name: Dump GitHub pull request context
id: github_pull_request_step
run: echo '${{ toJSON(github.event.pull_request) }}'
- name: Check if the PR body is containing the required closing message
if: contains(github.event.pull_request.body, 'Closes')
run: echo "Found _Closes_ message with autolinked issue in the body of PR $NUMBER"
env:
NUMBER: ${{ github.event.pull_request.number }}
# Update README from step 3 to step X.
- name: Update to step X
uses: skills/action-update-step@v2
with:
token: ${{ secrets.GITHUB_TOKEN }}
from_step: 3
to_step: X

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# Compiled source #
###################
*.com
*.class
*.dll
*.exe
*.o
*.so
# Packages #
############
# it's better to unpack these files and commit the raw source
# git has its own built in compression methods
*.7z
*.dmg
*.gz
*.iso
*.jar
*.rar
*.tar
*.zip
# Logs and databases #
######################
*.log
*.sql
*.sqlite
# OS generated files #
######################
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes
ehthumbs.db
Thumbs.db

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Copyright (c) GitHub, Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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<header>
<!--
<<< Author notes: Course header >>>
Include a 1280x640 image, course title in sentence case, and a concise description in emphasis.
In your repository settings: enable template repository, add your 1280x640 social image, auto delete head branches.
Add your open source license, GitHub uses MIT license.
-->
# Connect the dots in a GitHub repository
_Useful tips when navigating through your repository._
</header>
<!--
<<< Author notes: Course start >>>
Include start button, a note about Actions minutes,
and tell the learner why they should take the course.
-->
## Welcome
Have you ever worked in a repository with a lot of history? Perhaps you've had to track down related issues and pull requests in the past, or you've had to find who committed a particular change. If you've ever found yourself in any of these situations, you'll know how important it is to navigate your workspace.
- **Who is this for**: Developers, GitHub users, users new to Git, students, managers, and teams.
- **What you'll learn**:
- Find relevant issues and pull requests.
- Search history to find context.
- Make connections within GitHub to help others find things.
- **What you'll build**: Repository with existing commits, duplicated issues, and a content defect to be fixed.
- **Prerequisites**: Before you take this course, you may want to go through the [GitHub Quickstart](https://docs.github.com/en/get-started/quickstart) introduction on GitHub Docs and [Introduction to GitHub](https://github.com/skills/introduction-to-github) course on GitHub Skills.
- **How long**: This course takes less than 15 min to complete.
In this course, you will:
1. Resolve a duplicate issue.
2. Find a commit in history.
3. Fix a broken sidebar.
### How to start this course
<!-- For start course, run in JavaScript:
'https://github.com/new?' + new URLSearchParams({
template_owner: 'skills',
template_name: 'connect-the-dots',
owner: '@me',
name: 'skills-connect-the-dots',
description: 'My clone repository',
visibility: 'public',
}).toString()
-->
[![start-course](https://user-images.githubusercontent.com/1221423/235727646-4a590299-ffe5-480d-8cd5-8194ea184546.svg)](https://github.com/new?template_owner=skills&template_name=connect-the-dots&owner=%40me&name=skills-connect-the-dots&description=My+clone+repository&visibility=public)
1. Right-click **Start course** and open the link in a new tab.
2. In the new tab, most of the prompts will automatically fill in for you.
- For owner, choose your personal account or an organization to host the repository.
- We recommend creating a public repository, as private repositories will [use Actions minutes](https://docs.github.com/en/billing/managing-billing-for-github-actions/about-billing-for-github-actions).
- Scroll down and click the **Create repository** button at the bottom of the form.
3. After your new repository is created, wait about 20 seconds, then refresh the page. Follow the step-by-step instructions in the new repository's README.
<footer>
<!--
<<< Author notes: Footer >>>
Add a link to get support, GitHub status page, code of conduct, license link.
-->
---
Get help: [Post in our discussion board](https://github.com/skills/.github/discussions) &bull; [Review the GitHub status page](https://www.githubstatus.com/)
&copy; 2023 GitHub &bull; [Code of Conduct](https://www.contributor-covenant.org/version/2/1/code_of_conduct/code_of_conduct.md) &bull; [MIT License](https://gh.io/mit)
</footer>

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# Resources
- [Learning resources](learning-resources.md)
- [Documentation references](doc-references.md)
- [Past work](past-work.md)

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# Documentation References
_List handy documentation references, like https://docsify.js.org._

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# GIT tics
# Fetch a file from another branch to the current one
git checkout branch_name -- filename
# Unstage all changes but leave files in the working directory untouched
git reset HEAD
# Unstage a file
git reset HEAD <filename>
# Go back to last commit and remove all changes from working directory
git reset HEAD --hard
# Delete untracked files
git clean -f
# Compare two branches
git diff develop..master
# Compare two commits
git diff <sha>..<sha>
## Unstage file
```bash
git reset filename
```
## Unstage deleted file
```bash
git checkout HEAD filename
```
## Undo commit
```bash
git reset --soft HEAD\^
```
## Checkout remote branch
```bash
git fetch origin
git checkout develop
```
## Go back to previous branch
```bash
git checkout -
```
## Create empty master branch
```bash
git branch -D master
git checkout --orphan master
```
## Tag the release
```bash
# optional: tag important things, such as releases
git tag 1.0.0-RC1
```
## Delete local tag
```bash
git tag -d v0.2.0
```
## Delete remote tag
```bash
git push origin :refs/tags/v0.2.0
```
## Amend last commit
If you want to change the message of the latest commit do
```bash
git commit --amend -m "New commit message"
```
## Revert specific file to previous version
If you want to revert a specific file to its previous version do
```bash
git checkout -- filename
```
## Undo all changes in branch
If you want to reset all non-committed changes do
```bash
git reset --hard
```
## Restore a file deleted in a previous commit
If you want to restore a file deleted in a previous commit do
```bash
git rev-list -n 1 HEAD -- <file_path>
git checkout <deleting_commit>^ -- <file_path>
```
## Remove a file from a commit that has not been pushed
If you want to remove a specific file from a commit that has not been pushed do
```bash
git reset HEAD filename
```
You can do it without the --, but if the filename looks like a branch or tag (or other revision identifier), it may get confused, so using -- is best.
## Checkout specific version of file
You can also check out a particular version of a file
```bash
git checkout v1.2.3 -- filename # tag v1.2.3
git checkout stable -- filename # stable branch
git checkout origin/master -- filename # upstream master
git checkout HEAD -- filename # the version from the most recent commit
git checkout HEAD^ -- filename # the version before the most recent commit
```
## Remove a commit that has not been pushed
```bash
git reset --hard HEAD^
```
to reset to the previous commit before the current head; that way you don't have to be copying around commit IDs.
## Revert a commit
Identify the hash of the commit, using `git log`, then use `git revert <commit>` to create a new commit that removes these changes. In a way, `git revert` is the converse of `git cherry-pick` -- the latter applies the patch to a branch that's missing it, the former removes it from a branch that has it.
## Create a patch
```bash
git commit ...
git checkout <branch_to_apply_patch_to>
git format-patch <branch_to_compare_against> --stdout > fix_empty_poster.patch
git apply --stat fix_empty_poster.patch
git apply --check fix_empty_poster.patch
git am --signoff < fix_empty_poster.patch
```
or
```bash
git diff > fix_empty_poster.patch
git apply fix_empty_poster.patch
```
## Sync a fork
Add remote repository `upstream`.
```bash
git remote add upstream https://github.com/trntv/yii2-starter-kit.git
```
Fetch latest commit from it
```bash
git fetch upstream
```
Merge these commits to your repository
```bash
git checkout master
git merge upstream/master
```
**IMPORTANT: there might be a conflicts between `upstream` and your code. You should resolve merging conflicts on your own**
## Prune remote branches
```bash
git fetch --prune && git branch -r | awk '{print $1}' | egrep -v -f /dev/fd/0 <(git branch -vv | grep origin) | awk '{print $1}' | xargs git branch -d
```
## Submodules
If you want to use someone else's repo as a Git Submodule on GitHub do
```bash
git submodule add git://github.com/username/repo.git destination/folder
git submodule init
git submodule update
```
from the root of your project.
## Stash
```bash
git stash save
git stash save --include-untracked (-u)
git stash pop (git stash apply && git stash drop)
git stash apply (to re-use same stash later)
git stash list
git stash show
git stash apply
git stash branch testchanges
```
## Renaming branches
If you want to rename a branch while pointed to any branch, do :
```
git branch -m <oldname> <newname>
```
If you want to rename the current branch, you can do:
```
git branch -m <newname>
```
## git-extras
```bash
git setup (from git-extras)
git ignore .DS_Store
git summary
git effort --above 10
git undo
```

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<!-- index.html -->
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<meta charset="UTF-8" />
<link rel="stylesheet" href="//unpkg.com/docsify/themes/vue.css" />
</head>
<body>
<div id="app"></div>
<script>
window.$docsify = {
name: "REPONAME",
repo: "USERNAME/REPONAME",
homepage: "index.html",
loadSidebar: true,
};
</script>
<script src="//unpkg.com/docsify/lib/docsify.min.js"></script>
</body>
</html>

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# Learning resources
_List your favorite learning resources here._

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# Past work
_Include references to your own completed Learning Labs or other work_.