Using multi-line scripts about cargo-generate-rpm

[cat-in-136]

Generally speaking, TOML can accept "here-document". My app also accept it. Please specify script as follows:

[package.metadata.generate-rpm]
pre_install_script = """
echo some command > /dev/null
echo another command > /dev/null
"""

[ximon18]

Thanks.

And if I want the script to be a file outside of Cargo.toml? I'd rather not put lots of Bash script into my Cargo.toml.

Ximon

Update: Hmm, I suppose I could use the here-doc approach to enable me to both execute and remove a script placed in /tmp/ as a workaround.

[cat-in-136]

Like RPM native spec file format, scriptlets shall be written Cargo.toml directly. It is not really intended to be huge scripts with more than hundred lines long.

IMHO, considering the transparency for users, it is better to leave the large script stored in a separated file such as /usr/share/foobar/rpm/install-script.sh so that they can refer to it later.

[ximon18]

Thanks for the advice. I do not want scriptlets in Cargo.toml, I don't want it to become cluttered and to mix purposes and languages together like that. However I hadn't thought about using assets under /usr/share, I will try that as indeed it is good if the scripts invoked are available on the host post (successful or failed) install.

[ximon18]

So we realized that the workaround of specifying a command that runs a script file doesn't work for post_uninstall_script as by the time it is run the script has been removed from disk.

Still not wanting to pollute my Cargo.toml with Bash scripts I'm now trying to see if the new --set-metadata functionality can help here, with:

cargo generate-rpm --set-metadata "post_uninstall_script = \"\"\"$(cat pkg/rpm/postuninst)\"\"\""

This looks fine when the created package is inspected:

$ rpm -qp --scripts target/generate-rpm/routinator-0.12.0-dev-1.x86_64.rpm 
postinstall scriptlet:
/usr/share/routinator/rpm/postinst $*
preuninstall scriptlet:
/usr/share/routinator/rpm/preuninst $*
postuninstall scriptlet:
#!/bin/bash -e
# Script based on the RPM %systemd_postun scriptlet. See:
#   - https://docs.fedoraproject.org/en-US/packaging-guidelines/Scriptlets/#_systemd
#   - https://cgit.freedesktop.org/systemd/systemd/tree/src/core/macros.systemd.in

systemctl daemon-reload >/dev/null 2>&1 || :
if [ $1 -ge 1 ] ; then
    systemctl try-restart routinator.service >/dev/null 2>&1 || :
fi

[cat-in-136]

Since it is up to an RPM specification, these scripts should be defined using a multi-string string, such as #17 (comment). Of course, you can use escaped linefeed \n in a basic string instead of raw string in a multi-line basic string (see also: https://toml.io/en/v1.0.0#string ).