Opencascade for the masses?

[blacey]

Long story short, the Homebrew macOS package management team will not accept an opencascade formula that does not download the source tarball from the official opencascade site but the opencascade download site requires credentials to download the tarball - not possible in a formula. Does anyone know of a solution or how to best to reach the opencascade team for possible solutions? While we can host an opencascade formula in the FreeCAD-homebrew tap, it would be better for the opencascade ecosystem to offer it more broadly in the HomeBrew core with prebuilt bottles.

I'm ready and willing to continue my work on the formula and work with the Homebrew team to make it generally available but need to get past this small hurdle.

[Kunda1]

I've had good success getting typo patches submitted via http://www.salome-platform.org/forum/forum_9
It's safe to say that the OCC Devs keep an eye on the forums. But maybe a personal more direct way is more ideal?

[blacey]

I've had good success getting typo patches submitted via http://www.salome-platform.org/forum/forum_9
It's safe to say that the OCC Devs keep an eye on the forums. But maybe a personal more direct way is more ideal?

Thanks. @saso pointed me to Quaor who provided the contact information for the Opencascade kernel project. I have penned a note to him - hopefully he will be able to help directly or point me to someone who can.

[triplus]

Until they change the policy (provide credentials to download) you could i guess try to download a snapshot (provided in tar.gz or zip format) and see how that goes. Browsing through:

http://git.dev.opencascade.org/gitweb/? ... a=shortlog

And taking a quick glance this looks relevant:

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2017-08-30 	bugmaster	Incrementing OCCT version up to 7.2.0 	commit | commitdiff | tree | snapshot (tar.gz zip)

P.S. Downloading a snapshot by for example using wget highly likely should be achievable.

[blacey]

http://git.dev.opencascade.org/gitweb/? ... a=shortlog
P.S. Downloading a snapshot by for example using wget highly likely should be achievable.

Thanks but something like that won't work because each separate download yields a different sha so the git snapshot process must mutate some of the tarball content slightly.

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curl -L -o opencascade-7.2.0.tgz "http://git.dev.opencascade.org/gitweb/?p=occt.git;a=snapshot;h=refs/tags/V7_2_0;sf=tgz"
openssl sha -sha256 opencascade-7.2.0.tgz 
SHA256(opencascade-7.2.0.tgz)= f9a81ca2267635773af9fff80625735dd4f65389af986fe93a94263081b422e9

The formula requires a consistent sha embedded in the formula that Homebrew uses to verify the download.

[looo]

As oce is not yet adopting occ version 7.0 and higher, we could try to create a kind of community fork of occ7.2 on github.

[blacey]

As oce is not yet adopting occ version 7.0 and higher, we could try to create a kind of community fork of occ7.2 on github.

@Quaoar provided the contact information for the Opencascade Kernel project manager. I have reached out to him and he is interested in finding a solution to support Homebrew and said he will get back to my later this week. Fingers-crossed that this will bear fruit.

[looo]

ok, this is definitely a better solution.

[triplus]

Thanks but something like that won't work because each separate download yields a different sha so the git snapshot process must mutate some of the tarball content slightly.

Interesting.

@Quoroar provided the contact information for the Opencascade Kernel project manager. I have reached out to him and he is interested in finding a solution to support Homebrew and said he will get back to my later this week. Fingers-crossed that this will bear fruit.

Nice!

[blacey]

Thanks but something like that won't work because each separate download yields a different sha so the git snapshot process must mutate some of the tarball content slightly.

Interesting.

md5deep doesn't find any differences between two downloads so I wonder if it is simply some metadata on the tarball that causes the sha to change.

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$ openssl sha -sha256 opencascade-7.2.0.a.tgz 
SHA256(opencascade-7.2.0.a.tgz)= 7aecff59b9f4bc3dda87059c7b91f6d6be1ff0f4d80aef2704e11df51cc4dd1e

$ openssl sha -sha256 opencascade-7.2.0.b.tgz 
SHA256(opencascade-7.2.0.b.tgz)= 0747951dee19c4fc644843d90218349e5d3192500da5282f5d3a923fe9c77448

$ md5deep -r -s occt-V7_2_0.a > /tmp/occt.a.sums
$ md5deep -r -X /tmp/occt.a.sums occt-V7_2_0.b