3.0 KiB
vcs-test
We run a version control server for testing at vcs-test.golang.org.
Machine initialization
The machine should just run. You should not need these instructions very often.
In particular you do not need them just to make a change to vcweb.
Skip ahead to the next section.
The VM runs in the builder project “symbolic-datum-552” in zone us-central1-a,
where it has a reserved static IP address named vcs-test.
To destroy the current VM (if any) and rebuild a fresh one in its place, run:
./rebuild-server.sh && ./rebuild-systemd.sh && ./redeploy-vcweb.sh
You should not need to do this unless you have changed rebuild-server.sh and want to test it.
To delete the VM's current systemd configuration for vcweb and upload the configuration
from the local directory (specifically, vcweb.service and vcweb*.socket), run:
./rebuild-systemd.sh && ./redeploy-vcweb.sh
You should not need to do this unless you have changed the systemd configuration files.
vcweb
The Go program that runs the actual server is in the subdirectory vcweb.
For local development:
go build -o vcweb.exe ./vcweb && ./vcweb.exe
It maintains files in /tmp/vcweb and serves localhost:8088.
Once you are happy with local testing, deploy to the VM by running ./redeploy-vcweb.sh.
Repositories
The server can serve Bazaar, Fossil, Git, Mercurial, and Subversion repositories.
The root of each repository is https://vcs-test.golang.org/VCS/REPONAME,
where VCS is the version control system's command name (bzr for Bazaar, and so on),
and REPONAME is the repository name.
To serve a particular repository, the server downloads
gs://vcs-test/VCS/REPONAME.zip from Google Cloud Storage and unzips it
into an empty directory.
The result should be a valid repository directory for the given version control system.
If the needed format of the zip file is unclear, download and inspect gs://vcs-test/VCS/hello.zip
from https://vcs-test.storage.googleapis.com/VCS/hello.zip.
Google Cloud Storage imposes a default Cache-Control policy of 3600 seconds for
publicly-readable objects; for instructions to disable caching per object, see
gsutil setmeta.
vcweb itself may serve stale data for up to five minutes after a zip file is updated.
To force a rescan of Google Cloud Storage, fetch
https://vcs-test.golang.org/VCS/REPONAME?vcweb-force-reload=1.
Static files
The URL space https://vcs-test.golang.org/go/NAME is served by static files,
fetched from gs://vcs-test/go/NAME.zip.
The main use for static files is to write redirect HTML.
See gs://vcs-test/go/hello.zip for examples.
Note that because the server uses http.DetectContentType to deduce
the content type from file data, it is not necessary to
name HTML files with a .html suffix.
HTTPS
The server fetches an HTTPS certificate on demand from Let's Encrypt,
using golang.org/x/crypto/acme/autocert.
It caches the certificates in gs://vcs-test-autocert using
golang.org/x/build/autocertcache.