feat: add support for homeConfigurations

This enables support for `homeConfigurations` (the Home Manager
standalone configurations).

comment_on_pr.sh

@@ -64,7 +64,7 @@ markdown_from_report() {
 
 <details><summary><b>Tips on reading this data</b></summary>
 
-- For NixOS configurations you generally care only about the `Size` (closure size/size on disk).
+- For NixOS/Home-Manager configurations you generally care only about the `Size` (closure size/size on disk).
   - Reduce the `Size` by disabling unneeded services/default packages.
 - For Packages you care about both the `Size` and the `NAR Size`.
   - Reduce the `NAR Size` by reducing the size of the build outputs, e.g. don't copy unnecessary data to the $out dir, optimize binaries for size, etc.
@@ -87,6 +87,16 @@ markdown_from_report() {
       echo "$compare" | json_to_md_rows_and_change "nixosConfigurations"
       echo
     fi
+    if echo "$compare" | has_elements 'homeConfigurations'; then
+      cat <<-"EOF"
+				## Home Manager Configurations
+
+				| Name | Size | Size Change | NAR Size | NAR Size Change |
+				|------|-----:|------------:|---------:|----------------:|
+			EOF
+      echo "$compare" | json_to_md_rows_and_change "homeConfigurations"
+      echo
+    fi
     if echo "$compare" | has_elements 'packages'; then
       cat <<-"EOF"
 				## Packages
@@ -108,6 +118,16 @@ markdown_from_report() {
       json_to_md_rows "nixosConfigurations" "$1"
       echo
     fi
+    if has_elements 'homeConfigurations' "$1"; then
+      cat <<-"EOF"
+				## Home Manger Configurations
+
+				| Name | Size | NAR Size |
+				|------|-----:|---------:|
+			EOF
+      json_to_md_rows "homeConfigurations" "$1"
+      echo
+    fi
     if has_elements 'packages' "$1"; then
       cat <<-"EOF"
 				## Packages

create-report.sh

@@ -20,13 +20,22 @@ packages=$(
 log "$packages"
 endgroup
 
+group 'Show Home Manager Configurations'
+hmConfigs=$(
+  jq --raw-output '.homeConfigurations | select(. != null) | keys[]' <<-EOF
+		$flake_info
+	EOF
+)
+log "$hmConfigs"
+endgroup
+
 group 'Show NixOS Configurations'
-configurations=$(
+nixosConfigs=$(
   jq --raw-output '.nixosConfigurations | select(. != null) | keys[]' <<-EOF
 		$flake_info
 	EOF
 )
-log "$configurations"
+log "$nixosConfigs"
 endgroup
 
 pkgs_json() {
@@ -42,10 +51,22 @@ pkgs_json() {
   endgroup
 }
 
-configs_json() {
+hm_configs_json() {
+  group 'Building Home Manager configurations'
+  trap endgroup RETURN
+  for config in $hmConfigs; do
+    log "Building $config"
+    path=$(nix build --print-out-paths ".#homeConfigurations.$config.activationPackages")
+    log "Calculating size of $config"
+    nix path-info --closure-size --json "$path" |
+      jq --compact-output --arg pkg "$config" '.[] | {"name": $pkg, "size": .closureSize, "narSize": .narSize}'
+  done
+}
+
+nixos_configs_json() {
   group 'Building NixOS configurations'
   trap endgroup RETURN
-  for config in $configurations; do
+  for config in $nixosConfigs; do
     log "Building $config"
     path=$(nix build --print-out-paths ".#nixosConfigurations.$config.config.system.build.toplevel")
     log "Calculating size of $config"
@@ -55,9 +76,11 @@ configs_json() {
 }
 
 pkgs=$(pkgs_json | jq --slurp '.')
-configs=$(configs_json | jq --slurp '.')
+hmConfigs=$(hm_configs_json | jq --slurp '.')
+nixosConfigs=$(nixos_configs_json | jq --slurp '.')
 
 echo "{}" | jq \
   --argjson pkgs "$pkgs" \
-  --argjson configs "$configs" \
-  '{"packages": $pkgs, "nixosConfigurations": $configs}'
+  --argjson nixosConfigs "$nixosConfigs" \
+  --argjson hmConfigs "$hmConfigs" \
+  '{"packages": $pkgs, "nixosConfigurations": $nixosConfigs, "homeConfigurations": $hmConfigs}'