Category: Programing

install Docker in Mac

Mingmin

Docker is an open-source project that automates the deployment of applications inside software containers. Docker CE(Community Edition) for Mac is an easy-to-install desktop app for building, debugging, and testing Dockerized apps on a Mac.

1. system requirement

Docker for Mac works on OS X El Capitan 10.11 and newer macOS releases.

2. download Docker installation package

The stable Docker image for Mac can be downloaded with link.

3. install

Double-click Docker.dmg in your download folder, and follow the installation process.

After the installation is completed, goto Launchpad and start Docker by clicking the icon. After that, the whale in the top status bar shows that Docker is running, and accessible from a terminal.

4. test and run

Open a terminal, and try out some Docker commands to make sure it’s properly installed.

  • Run docker version to check that you have the latest release installed.

  • Run docker run hello-world to verify that Docker is pulling images and running as expected.

squash commits in git

Mingmin

When submitting a pull request, it’s highly suggested to squash your commits down to a few, or one, discreet changesets.

To do that, the below example shows the detailed steps:

Now I have added three commits in a Git repository as below
three original commits

Next, let’s start the squash. First go to the home folder of git repository. Then run the command

# there're 3 commits, so `HEAD~3` here
git rebase -i HEAD~3

You can see below prompted message

pick 37ff3bd commit1
pick 32756c4 commit2
pick a13ca74 commit3

Change the word pick to squash except the first line, like

pick 37ff3bd commit1
squash 32756c4 commit2
squash a13ca74 commit3

After save a new commit is ready, and you can update with another commit comment like:

squash 3 into 1
# This is a combination of 3 commits.
# This is the 1st commit message:
commit1

# This is the commit message #2:

commit2

# This is the commit message #3:

commit3

Now run the git push command

git push --force

Now in git repository, you would find that the previous 3 commits are replace by one squashed commit.
squashed commit