Allow runtime install of tools

[viceice]

Make all possible tools runtime installable.

TODO

• prepare-tool: install tool base deps as root #121
• Cache dir / volume #197
• Restructuring of folders/links #213
• bundler Support install-tool for Bundler and Cocoapods #251
• cocoapods Support install-tool for Bundler and Cocoapods #251
• composer
• docker feat(docker): convert to v2 tool #651
• dotnet: runtime install #118
• elixir feat(erlang): migrate erlang to v2 tools #376
• erlang: runtime install #318
• add flutter tool #200
• git-lfs feat(git-lfs): convert to v2 #652
• git runtime install #653
• golang: runtime install #119
• gradle
• hashin (pip_requirements) feat(python): simlify install and add hashin, pip-tools, pipenv #639
• helm: runtime install #199
• java
• Runtime installation of Maven #178
• nix feat(nix): convert to v2 #573
• node: runtime install #217
• npm
• pipenv feat(python): simlify install and add hashin, pip-tools, pipenv #639
• pip-tools (pip-compile) feat(python): simlify install and add hashin, pip-tools, pipenv #639
• php: runtime install #120
• pnpm
• poetry
• feat(powershell): convert to v2 tool #633
• feat: convert python to a v2 tool #404
• ruby: runtime install #475
• rust: runtime install #571
• sbt
• scala
• swift: runtime install #576
• fix: terraform non-root install #181, test: install non-root terraform #198
• yarn

[rarkins]

I don't think it really matters much whether it's in /home/user or /usr/local however /usr/local would probably be better for OpenShift, where the UID is random.

[viceice]

We like to implement a new binarySource=install where renovate install tools dynamically at runtime.

Use-case is to have smaller docker image used in kubernets, which can download missing tools on demand.

ref #96

renovatebot/docker-buildpack#144 (comment)

[rarkins]

Here's now I'd like to approach this:

• Separate issue for each tool/language
• Issues assigned to whoever is working on them
• Ensure tests are updated for each tool as part of the same PR (i.e. it installs and verifies as non-root)

[viceice]

All tools are now runtime installable. Only git is left. Not possible yet. Will open a new issue for that