Pip package git_trac_command, add pip packages to conda environments

[mkoeppe]

This is a pip-installable package

python3 -m pip install git+https://github.com/sagemath/git-trac-command

... but it is best to be installed by the user in their system environment, not in SAGE_VENV.

For example, we want to make it available on Gitpod, in devcontainers, and the user-facing Sage Docker images.

In src/environment-dev.yml (#33740), it should be added as a pip: line. We implement a general mechanism for doing that. It also adds a number of pip-installable optional packages without conda package to src/environment-optional.yml.

[mkoeppe]

(Without #33589) I also get

(sage-sh) gitpod@sagemath-sagetracmirror-72wwexpcfmb:sagetrac-mirror$ git trac checkout 33608
Loading ticket #33608...
Checking out Trac #33608 remote branch u/klee/33608 -> local branch t/33608/33608...
Traceback (most recent call last):
    STDERR: Warning: Permanently added the ECDSA host key for IP address '104.197.143.230' to the list of known hosts.
    STDERR: Load key "/home/gitpod/.ssh/id_rsa": invalid format
    STDERR: git@trac.sagemath.org: Permission denied (publickey).
    STDERR: fatal: Could not read from remote repository.
    STDERR: 
    STDERR: Please make sure you have the correct access rights
    STDERR: and the repository exists.

[gh-tobiasdiez]

Did you followed the steps outlined in sage's gitpod docs to add the ssh key?

[mkoeppe]

No. In #33589 we should make sure that fetching can be done without these steps.

[mkoeppe]

Last 10 new commits:

​a5d10a2	Fix typo
​4950bcf	Add fallback to github mirror
​c235ead	Disable pushing to github
​40d1e23	Always disable pushing to origin
​89591c4	Remove wrong trac from prebuild
​3d450f3	Update docs
​e9035ae	Silence semi-expected errors during (pre)build
​8432e1d	Merge #33589
​8aaaf07	build/pkgs/python3/distros/debian.txt: New
​eacd393	docker/.gitpod.Dockerfile: Install pip for system python, install git-trac-command

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​3f71861

docker/.gitpod.Dockerfile: hardcode python3-pip

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​866a833

docker/.gitpod.Dockerfile: Run apt-get update first

[git]

Branch pushed to git repo; I updated commit sha1. This was a forced push. Last 10 new commits:

​ccbc21a	bootstrap, bootstrap-conda, src/doc/bootstrap: Use build/bin/sage-package directly
​4560895	src/doc/Makefile: Remove explicit use of SAGE_ROOT and the top-level sage script
​7759f3c	Generate en/reference/repl/options.txt at build time, not bootstrap time
​58ab878	bootstrap-conda: Fix typo, generate->generating to match messages from bootstrap
​12ea8ce	build/pkgs/_develop/distros: Add packages providing gpgconf
​238b7bb	build/pkgs/_develop/distros: Add packages providing ssh
​01a126c	Merge #33851
​a74ccaa	build/pkgs/git_trac_command: New
​e28f6d9	build/pkgs/_develop/dependencies: Add git_trac_command
​d2b8c4e	bootstrap-conda: Also generate pip: lines

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​ffde371

bootstrap-conda: Do not include packages that declare SAGERUNTIME as a dependency

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​d6a916c

Merge tag '9.7.beta1' into t/33613/gitpod__install_git_trac_command

[git]

Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:

​67c8238	src/bin/sage: Print error to error output
​bc77bfd	bootstrap-conda: Write an additional comment
​4c2adf7	bootstrap-conda: Rewrite using fewer redirects
​ac2c48d	build/pkgs/git_trac_command: New
​4a0b6f4	bootstrap-conda: Also generate pip: lines
​ef01ba4	bootstrap-conda: Do not include packages that declare SAGERUNTIME as a dependency
​8e511f2	bootstrap-conda: Hardcode git_trac_command as a devel package

[mkoeppe]

Rebased away from #33822, #33851.

Ready for review

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​94d6ec7

Merge tag '9.7.beta3' into t/33613/gitpod__install_git_trac_command

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​2019f47

bootstrap-conda: Also check dependencies_order_only