version, while related to the app’s own versioning, doesn’t have to follow it exactly. It is common to change it slightly so it can be interpolated in other stanzas, usually in url to create a Cask that only needs version and sha256 changes when updated. This can be taken further, when needed, with ruby String methods.
For example:
Instead of
version '1.2.3'
url 'https://example.com/file-version-123.dmg'We can use
version '1.2.3'
url "https://example.com/file-version-#{version.delete('.')}.dmg"We can also leverage the power of regular expressions. So instead of
version '1.2.3build4'
url 'https://example.com/1.2.3/file-version-1.2.3build4.dmg'We can use
version '1.2.3build4'
url "https://example.com/#{version.sub(%r{build\d+}, '')}/file-version-#{version}.dmg"The examples above can become hard to read, however. Since many of these changes are common, we provide a number of helpers to clearly interpret otherwise obtuse cases:
| Method | Input | Output |
|---|---|---|
major |
1.2.3-a45,ccdd88 |
1 |
minor |
1.2.3-a45,ccdd88 |
2 |
patch |
1.2.3-a45,ccdd88 |
3 |
major_minor |
1.2.3-a45,ccdd88 |
1.2 |
major_minor_patch |
1.2.3-a45,ccdd88 |
1.2.3 |
minor_patch |
1.2.3-a45,ccdd88 |
2.3 |
before_comma |
1.2.3-a45,ccdd88 |
1.2.3-a45 |
after_comma |
1.2.3-a45,ccdd88 |
ccdd88 |
dots_to_hyphens |
1.2.3-a45,ccdd88 |
1-2-3-a45,ccdd88 |
no_dots |
1.2.3-a45,ccdd88 |
123-a45,ccdd88 |
Similar to dots_to_hyphens, we provide all logical permutations of {dots,hyphens,underscores}_to_{dots,hyphens,underscores}. The same applies to no_dots in the form of no_{dots,hyphens,underscores}, with an extra no_dividers that applies all of those at once.
Finally, there are before_colon and after_colon that act like their comma counterparts. These four are extra special to allow for otherwise complex cases, and should be used sparingly. There should be no more than one of , and : per version. Use , first, and : only if absolutely necessary.