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Installing Leiningen on Mac

1. Introduction to Leiningen​

Leiningen is a project build tool for Clojure, equivalent to Maven in Java.

Installing Leiningen​

Method 1: Install via Brew​

This is the simplest method, but if your Mac's brew source is configured to use foreign sources, or some sources don't have the corresponding dependencies, you'll need to switch.

How to switch brew sources? See brew switch to domestic sources

Here are some key points from that blog post:

# Replace brew.git:
 cd "$(brew --repo)"
# USTC:
 git remote set-url origin https://mirrors.ustc.edu.cn/brew.git
# Tsinghua University:
 git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git

# Replace homebrew-core.git:
 cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
# USTC:
 git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git
# Tsinghua University:
 git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git

# Replace homebrew-bottles:
# USTC:
 echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.ustc.edu.cn/homebrew-bottles' >> ~/.bash_profile
 source ~/.bash_profile
# Tsinghua University:
 echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.tuna.tsinghua.edu.cn/homebrew-bottles' >> ~/.bash_profile
 source ~/.bash_profile

# Apply changes:
 brew update

Method 2: Install via Official Repository Guide​

Open the official website: https://github.com/technomancy/leiningen

At the bottom of the repository homepage, you'll see Installation with 5 steps. Here's the translation:

    1. Make sure Java is installed; OpenJDK version 8 is recommended at this time.
    1. Download the lein script from this project's stable branch.
    1. Place it in your $PATH. (~/bin is a good choice if it's on your path.) This means putting it in system variables - on Mac, that's the ~/.zshrc file.
    1. Make the file executable (chmod +x ~/bin/lein)
    1. Run it.

Note that when running this script, you may encounter some errors:

Download via File Failed​

Open the lein script and you'll see it requests a corresponding jar file. So output echo LEIN_URL in this command and download via browser.

image.png

After manual download, place the jar in ./leiningen-2.9.8/self-installs in the same directory as the lein script.

Then re-run the lein script.

Error: -classpath requires class path specification​

This may be caused by the script not specifying the correct classpath on this line. Set it to a fixed value, save, and run.

image.png

Verify Installation Success​

Open a new terminal and type lein

Prompt: image.png

This indicates installation is complete.