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guix: documented shasum gathering command

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janb84 2025-09-24 10:29:28 +02:00
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contrib/guix/README.md
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@ -103,6 +103,25 @@ worktree to save disk space:
./contrib/guix/guix-clean ./contrib/guix/guix-clean
``` ```
## Gathering shasums of build outputs
After a successful build, the shasums of the build outputs are gathered
into files named `SHA256SUMS`. These files are located in each of the
architecture-specific output directories.
To gather all shasums and output them together to console, for e.g.
inclusion in a Guix pull request comment, run:
For branch- or PR-based checkouts, use:
``` sh
uname -m && find guix-build-$(git rev-parse --short=12 HEAD)/output/ -type f -print0 | env LC_ALL=C sort -z | xargs -r0 sha256sum
```
For tag-based checkouts, use:
``` sh
uname -m && find guix-build-$(git describe --tags --exact-match | sed 's/^v//')/output/ -type f -print0 | env LC_ALL=C sort -z | xargs -r0 sha256sum
```
## Attesting to build outputs ## Attesting to build outputs