Hi! Efraim Flashner <efr...@flashner.co.il> skribis:
> 0.2.0 is now out! > 100% fewer GOOPS! > 'shepherd-run --version' now returns the correct string! Wo0t! Inspired by shepherd-run, I thought “hey let’s add this to Shepherd proper for 1.0, easy!”. Turns out that finding a way to pass the various options (‘-d’, ‘-E’, etc.) to the action that spawns a service was still an open issue. Solution: add these options to ‘herd’, and have it pass them as keyword arguments to the action that’s invoked. That’s allowed me to unify ‘herd schedule timer’ and the new ‘herd spawn transient’ (the name of the Awk-less GOOPS-less C-less ‘systemd-run’). Here’s the doc: --8<---------------cut here---------------start------------->8--- The “transient service maker” lets you run commands in the background, and it does so by wrapping those commands in transient services (*note Defining Services::). It is similar to the ‘systemd-run’ (https://www.freedesktop.org/software/systemd/man/latest/systemd-run.html) command, which you might have encountered before. A simple configuration file that uses this service looks like this: (use-modules (shepherd service transient)) (register-services (list (transient-service))) This creates a service called ‘transient’ that has a ‘spawn’ action, which you can use like this: # Run 'make' from the current directory. herd spawn transient -d "$PWD" -- make -j4 # Run 'rsync' from the home directory, inheriting # the 'SSH_AUTH_SOCK' environment variable. herd spawn transient \ --log-file=backup.log \ -E SSH_AUTH_SOCK=$SSH_AUTH_SOCK -- \ rsync -e ssh -vur . backup.example.org: Each of these ‘herd spawn transient’ commands creates a new transient service. Like any other service, they can be inspected and stopped. Running ‘herd stop transient’ stops all the currently running transients. The command runs from the directory specified by ‘default-service-directory’ or from that specified by the ‘--working-directory’ option of ‘herd’; it has with the environment variables in ‘default-environment-variables’, augmented with ‘HOME’ when running as a different user, with the addition of variables passed with ‘--environment-variable’. *Note Invoking herd::, for more info on influential command-line options. -- Procedure: transient-service [PROVISION] [#:requirement '()] Return a service with the given PROVISION and REQUIREMENT. The service has a ‘spawn’ action that lets users run commands in the background. --8<---------------cut here---------------end--------------->8--- It’s too big a change in between two release candidates, but it seemed better to get that right before 1.0. Lemme know what you think! Ludo’.
