Can't redirect the output of go run to a file

[kian99]

Bug Description

When running in the override-build step, the output of go run is not being redirected to a file as expected. In my override-build step I am using a go package to do some formatting on a file.

As I was typing out this bug report, I realised that I think this is happening because of snap confinement. It feels a bit frustrating to face snap confinement issues while in a build environment.

To Reproduce

Use the rockcraft.yaml below and put an exit 1 at the start of override-build and run rockcraft pack --debug.
Then try the following:

• go run github.com/openfga/cli/cmd/fga@latest model -h
• go run github.com/openfga/cli/cmd/fga@latest model -h > test-file
• ls -lah test-file
• go install github.com/openfga/cli/cmd/fga@latest
• /root/go/bin/fga model -h > test-file
• ls -lah test-file

On my machine:

# go run github.com/openfga/cli/cmd/fga@latest model -h > test-file
# ls -lah test-file
-rw-r--r-- 1 root root 0 Nov 19 12:31 test-file

# /root/go/bin/fga -h > test-file
# ls -lah test-file
-rw-r--r-- 1 root root 1.5K Nov 19 12:35 test-file

As you can see the first attempt results in an empty file (maybe because of snap confinement?) while the second attempt works.

Environment

$ lxc version
Client version: 6.1
Server version: 6.1

rockcraft.yaml

name: jimm
base: [email protected]
version: '0.1'
summary: Juju Intelligent Model Manager provides a convient way to manage all of your models!
description: |
    JIMM is a Juju controller, used in conjunction with the JaaS dashboard to provide a seamless way
    to manage models, regardless of where their controllers reside or what cloud they may be running on.

license: GPL-3.0
platforms:
    amd64:

parts:
    ca-certs:
        plugin: nil
        overlay-packages: [ca-certificates]
    builder: 
        plugin: go # https://canonical-craft-parts--694.com.readthedocs.build/en/694/common/craft-parts/reference/plugins/go_plugin.html
        after:
          - ca-certs
        source: .
        source-type: local
        build-snaps:
          - go/1.23/stable
        build-packages:
          - git
          - make 
        build-environment:
            - GOOS: linux
        override-build: |
            set -ex

            mkdir -p $CRAFT_PART_INSTALL/usr/local/bin

            make build/server
            cp ./jimmsrv $CRAFT_PART_INSTALL/usr/local/bin

            # The location of SQL files isn't configurable right now, as such we just 
            # place it in bin
            cp -r ./internal/dbmodel/sql $CRAFT_PART_INSTALL/usr/local/bin/sql

            # Convert the OpenFGA auth model to JSON and place a copy in the ROCK
            # Used by the charm to apply to the OpenFGA server, not by the container itself
            mkdir -p $CRAFT_PART_INSTALL/root/openfga/
            go install github.com/openfga/cli/cmd/fga@latest
            go run github.com/openfga/cli/cmd/fga@latest model transform --file ./openfga/authorisation_model.fga --output-format json > $CRAFT_PART_INSTALL/root/openfga/authorisation_model.json
            exit 1

Relevant log output

None