nix-flake-outputs-size/scripts/create-report.sh
Jalil David Salamé Messina 6b0b78e496
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fix(report): building the wrong derivation for home-manager
Small typo that was breaking this script T-T:

```bash
# Wrong:
nix build --print-out-paths ".#homeConfigurations.$config.activationPackages"

# Correct:
nix build --print-out-paths ".#homeConfigurations.$config.config.home.activationPackage"
```
2025-07-13 15:03:47 +02:00

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#!/bin/sh
set -eu
util_path="${GITHUB_ACTION_PATH:-.}/scripts/utils.sh"
# shellcheck source=scripts/utils.sh
. "${util_path}"
group 'Retrieving Flake information'
flake_info=$(nix flake show --json --quiet --quiet)
endgroup
system=$(nix eval --impure --json --expr 'builtins.currentSystem')
group 'Show Packages'
packages=$(echo "$flake_info" | jq --raw-output --argjson system "$system" 'getpath(["packages", $system]) | select(. != null) | keys[]')
[ -z "$packages" ] || log "$packages"
endgroup
group 'Show Home Manager Configurations'
hmConfigs=$(echo "$flake_info" | jq --raw-output '.homeConfigurations | select(. != null) | keys[]')
[ -z "$hmConfigs" ] || log "$hmConfigs"
endgroup
group 'Show NixOS Configurations'
nixosConfigs=$(echo "$flake_info" | jq --raw-output '.nixosConfigurations | select(. != null) | keys[]')
[ -z "$nixosConfigs" ] || log "$nixosConfigs"
endgroup
closure_size() {
name=$1
path=$2
log "Calculating size of $name at $path"
path_info=$(nix path-info --closure-size --json "$path")
echo "$path_info" |
jq --compact-output \
--arg pkg "$name" \
--arg path "$path" \
'.[] | {"name": $pkg, "path": $path, "size": .closureSize, "narSize": .narSize, "raw": .}'
}
pkgs_json() {
for package in $packages; do
log "Building $package"
path=$(nix build --print-out-paths ".#$package")
closure_size "$package" "$path"
done
}
hm_configs_json() {
for config in $hmConfigs; do
log "Building $config"
path=$(nix build --print-out-paths ".#homeConfigurations.$config.config.home.activationPackage")
closure_size "$config" "$path"
done
}
nixos_configs_json() {
for config in $nixosConfigs; do
log "Building $config"
path=$(nix build --print-out-paths ".#nixosConfigurations.$config.config.system.build.toplevel")
closure_size "$config" "$path"
done
}
group 'Building packages'
pkgs=$(pkgs_json | jq --slurp .)
endgroup
group 'Building Home Manager configurations'
hmConfigs=$(hm_configs_json | jq --slurp .)
endgroup
group 'Building NixOS configurations'
nixosConfigs=$(nixos_configs_json | jq --slurp .)
endgroup
echo "{}" | jq \
--argjson pkgs "$pkgs" \
--argjson hmConfigs "$hmConfigs" \
--argjson nixosConfigs "$nixosConfigs" \
'{"packages": $pkgs, "nixosConfigurations": $nixosConfigs, "homeConfigurations": $hmConfigs}' >"${1:-/dev/stdout}"