Fix issue with sshkit escaping $HOME

[KNejad]

It appears that in sshkit everything is being escaped except for the "~" sign here: https://github.com/capistrano/sshkit/blob/master/lib/sshkit/backends/abstract.rb#L85

So on the code I have changed it runs this check:

if test ! -d \$HOME/.rbenv/plugins/ruby-build; then echo "Directory does not exist '\$HOME/.rbenv/plugins/ruby-build'" 1>&2; false; fi

instead of this check:

if test ! -d $HOME/.rbenv/plugins/ruby-build; then echo "Directory does not exist '\$HOME/.rbenv/plugins/ruby-build'" 1>&2; false; fi

Note the missing \ before $HOME.

I believe this is intended functionality on sshkit, so I'm not creating a PR over there. However that causes an issue here, where it will never return correctly there, even if the directory $HOME/.rbenv exists.

To fix the issue, I replaced $HOME with ~ which when deploying with my version of the gem, everything then works correctly.

[capistrano-bot]

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[mattbrictson]

Looks good, thanks for the fix!

FYI please do not bump the version; that happens when the maintainer publish a release. I'll fix it up prior to merging.

[Eric-Guo]

But this PR lead below issue and previous version (2.1.4) have no such problem.

 DEBUG [89e42fce] Command: cd /var/www/oauth2id/releases/20200115021955 && ( export RBENV_ROOT="~/.rbenv" RBENV_VERSION="2.6.5" ; ~/.rbenv/bin/rbenv exec bundle install --path /var/www/oauth2id/shared/bundle --jobs 4 --without development test --deployment --quiet )

 DEBUG [89e42fce] 	rbenv: version `2.6.5' is not installed (set by RBENV_VERSION environment variable)

[mattbrictson]

@Eric-Guo Good catch, I'll revert this PR. Sorry about that!

[mattbrictson]

Reverted and released as 2.1.6.

[KNejad]

Sorry about that guys. I tested my change on a fresh Debian server and everything seemed to work fine. cap install worked with my branch and didn't work with the upstream version. Any idea why that happened on @Eric-Guo's project but not mine?

EDIT: Thinking about it now it might have something to do with my project using https://github.com/capistrano-plugins/capistrano-rbenv-install which installs the Ruby version specified in the project, during the installation. Not quite sure how that could effect it, but it's a likely cause worth looking into

[mattbrictson]

I tried running the command from @Eric-Guo's error message locally, and got the same error.

( export RBENV_ROOT="~/.rbenv" RBENV_VERSION="2.6.5" ; ~/.rbenv/bin/rbenv exec bundle install )
rbenv: version `2.6.5' is not installed (set by RBENV_VERSION environment variable)

Even though I do have Ruby 2.6.5 installed in ~/.rbenv.

I think the problem is that ~ is not expanded by the shell in this statement:

export RBENV_ROOT="~/.rbenv"
echo $RBENV_ROOT
# => ~/.rbenv

Whereas $HOME is expanded:

export RBENV_ROOT="$HOME/.rbenv"
echo $RBENV_ROOT
# => /Users/mbrictson/.rbenv

[Eric-Guo]

I use CentOS 7 and installation log can be found in my blog, I think it also not working in AMI Linux as I having one server also.

[mleu]

For a first deploy to a empty server had to do this workaround:

1. use capistrano-rbenv 2.1.5 to avoid sshkit escaping $HOME and get ruby installed. It then fails with @Eric-Guo's error message.
2. then switch to capistrano-rbenv 2.1.6 and deploy again

It seems like issue with sshkit escaping $HOME only occurs when you don't have ruby installed yet.