contexts: convert to on_system blocks

[bevanjkay]

#137512

[bevanjkay]

@p-linnane @miccal The depends_on statements on some of these are going to be unnecessary, except for passing the audit that compares the depends_on with the required version from sparkle.

[p-linnane]

I think we are using the combination of :or_older on the first block and the depends_on to prevent older OS's that don't have a version from throwing errors and breaking regeneration.

[bevanjkay]

For this specific cask, because the livecheck uses :sparkle the on_{system} block has to have a depends_on macos: that matches the minimum version in sparkle. Otherwise brew audit fails.

[p-linnane]

I misunderstood, but I get it now. That makes complete sense. Thanks!

[etiennepellegrini]

Downgrading to match the livecheck broke Contexts for me - it flashes for a second and exits when started.

$ brew uninstall contexts
$ cd $(dirname $(brew edit --print-path contexts))
$ git checkout a367607a6e -- contexts.rb
$ brew install contexts

fixed it.

(FYI:

OS: macOS 12.6.1 21G217 x86_64
Host: MacBookPro16,1
Kernel: 21.6.0
Shell: bash 5.2.15
CPU: Intel i9-9980HK (16) @ 2.40GHz
GPU: Intel UHD Graphics 630, AMD Radeon Pro 5500M
Memory: 24336MiB / 65536MiB

)

[bevanjkay]

@etiennepellegrini It looks like upstream is providing a manual link to 3.9.0, but their Sparkle updating mechanism may be broken at the moment.
https://contexts.co/whats-new/