- Make `brew extract` strip out bottle blocks
- Make `brew extract` output the path in a readable fashion
- Warn about building from source before fetching (not installing)
- If fetching a bottle fails, refetch and build from source.
I was wanting to do this today to add `ruby@2.6` and it's a social
rather than technical requirement (i.e. we don't want users to mess
with their homebrew/core unless they know what they are doing) so allow
overriding with `HOMEBREW_DEVELOPER` set.
Turn the output versioned formula from the form "name@version" to
"name-version", then following by appending the specific version
after it.
This solution ensures that separate extracted versions of a formulae
can exist alongside each other (e.g. 'python-2@2.7.17' and
'python-2@2.7.16').
Work around ronn's inability to nest indents within list items by modifying its output to add a line break and indent after lines ending with a colon that aren't a list item's first line. This allows `brew.1.md.erb` to join the commands' help text without extra line breaks, which avoids the issue where kramdown was turning any command specs containing pipe characters into tables in the HTML output.
If the formula to be retrieved was just version-bumped in the most
recent commit (HEAD), we would've ended up grabbing the second-most
recent version.
Instead, if the file already exists in tree at the current commit,
just construct the formula from that to get the version (for naming
purposes) and copy the file outright to its new location.
Also gsub! some particular formula contents to work around older
formulae ("brewkit" isn't around anymore, and url is expected to
be a method, not an instance variable).
