Install icu4c version 63 with Homebrew

问题

I was trying to start psql but got

psql: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

When I used postgres -D /usr/local/var/postgres, got the following error:

dyld: Library not loaded: /usr/local/opt/icu4c/lib/libicui18n.63.dylib
  Referenced from: /usr/local/bin/postgres
  Reason: image not found
[1]    2559 abort      postgres -D /usr/local/var/postgres

A quick search on libicui18n.63.dylib showed me I need icu4c lib with version 63. However brew list icu4c says I have the version 64.2.

I tried both brew install icu4c 63 & brew install icu4c@63 but no luck.

Can anyone help, please? Thanks in advance.

回答1:

Solution:

1) cd to Homebrew's formula directory

cd $(brew --prefix)/Homebrew/Library/Taps/homebrew/homebrew-core/Formula

2) Find desired commit (version 63 for icu4c) to checkout

git log --follow icu4c.rb

3) Checkout to a new branch

git checkout -b icu4c-63 e7f0f10dc63b1dc1061d475f1a61d01b70ef2cb7

4) Reinstall the library with the new version

brew reinstall ./icu4c.rb

5) Switch to the reinstalled version

brew switch icu4c 63.1

6) Checkout back to master

git checkout master

Sources:

Homebrew install specific version of formula?
http://hanxue-it.blogspot.com/2018/08/macos-homebrew-installing-older-version-of-software.html

回答2:

Like @dingusjh says, but use reinstall command instead of install in case brew complains about having icu4c installed already and you should try to extract. The complete command would then be:

brew reinstall https://raw.githubusercontent.com/Homebrew/homebrew-core/e7f0f10dc63b1dc1061d475f1a61d01b70ef2cb7/Formula/icu4c.rb

回答3:

This should be easier.

brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/e7f0f10dc63b1dc1061d475f1a61d01b70ef2cb7/Formula/icu4c.rb

来源：https://stackoverflow.com/questions/55826221/install-icu4c-version-63-with-homebrew

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postgresql

homebrew

icu4c