新しいPCにインストールしていたら Error: The `brew link` step did not complete successfullyというエラーが出たので修正しました。
$ brew install jq
==> Installing dependencies for jq: oniguruma
==> Installing jq dependency: oniguruma
==> Downloading https://homebrew.bintray.com/bottles/oniguruma-6.9.0.high_sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring oniguruma-6.9.0.high_sierra.bottle.tar.gz
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink include/oniggnu.h
/usr/local/include is not writable.
You can try again using:
brew link oniguruma
==> Summary
🍺 /usr/local/Cellar/oniguruma/6.9.0: 17 files, 1.3MB
==> Installing jq
==> Downloading https://homebrew.bintray.com/bottles/jq-1.5_3.high_sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring jq-1.5_3.high_sierra.bottle.tar.gz
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink include/jq.h
/usr/local/include is not writable.
You can try again using:
brew link jq
==> Summary
🍺 /usr/local/Cellar/jq/1.5_3: 19 files, 946.6KB
インストールは出来たようですがlinkを貼る権限がないようなので、includeというディレクトリを作成して権限を他のディレクトリと同じものを設定したところ解決しました。
sudo mkdir /usr/local/include
sudo chmod 775 /usr/local/include
sudo chown <user名>:admin /usr/local/include