doc-build.yml: Set NETLIFY_ALIAS to the tag name

[mkoeppe]

From sagemath/documentation#24 (comment)

When the workflow is invoked on GITHUB_REF of the form refs/tags/TAG_NAME, set NETLIFY_ALIAS=TAG_NAME. The resulting URL can then be referred to in a redirect rule. sagemath/documentation#24 (comment)

CC: @tobiasdiez @haraldschilly @dimpase

Component: website/wiki

Author: Matthias Koeppe

Branch/Commit: u/mkoeppe/doc_build_yml__set_netlify_alias_to_the_tag_name @ b786c07

Issue created by migration from https://trac.sagemath.org/ticket/33862

[mkoeppe]

Branch: u/mkoeppe/doc_build_yml__set_netlify_alias_to_the_tag_name

[mkoeppe]

comment:2

Untested, help welcome

---

New commits:

b786c07

.github/workflows/doc-build.yml: For tags, set NETLIFY_ALIAS to the tag name

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

Commit: b786c07

[mkoeppe]

comment:3

Still works for non-tag invocations of the workflow.

[tobiasdiez]

comment:4

I don't think this works for the following reasons:

• you edited the step that is only run for branches != develop
• the workflow currently only runs on the sagetrac mirror but there tags no longer are created when one believes https://github.com/sagemath/sagetrac-mirror/tags

[mkoeppe]

comment:5

Good catch.

[mkoeppe]

comment:7

Should we run it on sagemath/sage then for release tags?

[tobiasdiez]

comment:8

I don't know. It's still not clear to me why there are actually two github mirrors/repos and what should be run where.