feat: add nix for formatting

Also adds CI tests!

comment_on_pr.sh

@@ -11,34 +11,34 @@ util_path="${GITHUB_ACTION_PATH:-.}/utils.sh"
 #
 # JSON_FILE can be piped from stdin
 json_to_md_rows() {
-	jq --raw-output \
-		".$1[]"' | "| `\(.name)` | \(.size) | \(.narSize) |"' "$2" |
-		numfmt --suffix=B --to=iec-i --field=4,6
+  jq --raw-output \
+    ".$1[]"' | "| `\(.name)` | \(.size) | \(.narSize) |"' "$2" |
+    numfmt --suffix=B --to=iec-i --field=4,6
 }
 
 # USAGE: json_to_md_rows <FIELD> [JSON_FILE]
 #
 # JSON_FILE can be piped from stdin
 json_to_md_rows_and_change() {
-	jq --raw-output \
-		".$1[]"' | "| `\(.name)` | \(.size) | \(.sizeChange) | \(.narSize) | \(.narSizeChange) |"' |
-		numfmt --suffix=B --to=iec-i --field=4,6,8,10
+  jq --raw-output \
+    ".$1[]"' | "| `\(.name)` | \(.size) | \(.sizeChange) | \(.narSize) | \(.narSizeChange) |"' |
+    numfmt --suffix=B --to=iec-i --field=4,6,8,10
 }
 
 # USAGE: has_elements <FIELD> <JSON_FILE>
 has_elements() {
-	if [ "${2+set}" = 'set' ]; then
-		[ "$(jq ".$1 != []" "$2")" = 'true' ]
-	else
-		[ "$(jq ".$1 != []")" = 'true' ]
-	fi
+  if [ "${2+set}" = 'set' ]; then
+    [ "$(jq ".$1 != []" "$2")" = 'true' ]
+  else
+    [ "$(jq ".$1 != []")" = 'true' ]
+  fi
 }
 
 # USAGE: markdown_from_report <REPORT> [BASE_REPORT]
 #
 # If BASE_REPORT is provided, a comparison will be made
 markdown_from_report() {
-	cat <<-"EOF"
+  cat <<-"EOF"
 		<!-- AUTOGENERATED by nix-flake-outputs-size action -->
 
 		# Flake output sizes
@@ -49,12 +49,12 @@ markdown_from_report() {
 		- `Size`: the closure size (size on disk/NAR size + all transitive dependencies).
 		- `NAR Size`: the size of the build output (package without the dependencies).
 	EOF
-	if [ "${2+set}" = "set" ]; then
-		cat <<-"EOF"
+  if [ "${2+set}" = "set" ]; then
+    cat <<-"EOF"
 			- `[NAR] Size Change`: the amount changed compared to the main branch.
 		EOF
-	fi
-	cat <<-"EOF"
+  fi
+  cat <<-"EOF"
 
 		**Tips on reading this data:**
 
@@ -66,62 +66,62 @@ markdown_from_report() {
 		  - Don't worry too much about size, some dependencies are deduplicated, e.g. `glibc` adds ~40MiB to the `Size`, but is generally shared by ~every binary on the system, so, chances are, you are already including it from somewhere else and statically linking with e.g. `musl` is not gonna improve things.
 	EOF
 
-	if [ "${2+set}" = "set" ]; then
-		compare=$(jq --slurp --from-file "${GITHUB_ACTION_PATH:-.}/compare.jq" "$1" "$2")
-		if echo "$compare" | has_elements 'nixosConfigurations'; then
-			cat <<-"EOF"
+  if [ "${2+set}" = "set" ]; then
+    compare=$(jq --slurp --from-file "${GITHUB_ACTION_PATH:-.}/compare.jq" "$1" "$2")
+    if echo "$compare" | has_elements 'nixosConfigurations'; then
+      cat <<-"EOF"
 				# NixOS Configurations
 
 				| Name | Size | Size Change | NAR Size | NAR Size Change |
 				|------|-----:|------------:|---------:|----------------:|
 			EOF
-			echo "$compare" | json_to_md_rows_and_change "nixosConfigurations"
-			echo
-		fi
-		if echo "$compare" | has_elements 'packages'; then
-			cat <<-"EOF"
+      echo "$compare" | json_to_md_rows_and_change "nixosConfigurations"
+      echo
+    fi
+    if echo "$compare" | has_elements 'packages'; then
+      cat <<-"EOF"
 				# Packages
 
 				| Name | Size | Size Change | NAR Size | NAR Size Change |
 				|------|-----:|------------:|---------:|----------------:|
 			EOF
-			echo "$compare" | json_to_md_rows_and_change "packages"
-			echo
-		fi
-	else
-		if has_elements 'nixosConfigurations' "$1"; then
-			cat <<-"EOF"
+      echo "$compare" | json_to_md_rows_and_change "packages"
+      echo
+    fi
+  else
+    if has_elements 'nixosConfigurations' "$1"; then
+      cat <<-"EOF"
 				# NixOS Configurations
 
 				| Name | Size | NAR Size |
 				|------|-----:|---------:|
 			EOF
-			json_to_md_rows "nixosConfigurations" "$1"
-			echo
-		fi
-		if has_elements 'packages' "$1"; then
-			cat <<-"EOF"
+      json_to_md_rows "nixosConfigurations" "$1"
+      echo
+    fi
+    if has_elements 'packages' "$1"; then
+      cat <<-"EOF"
 				# Packages
 
 				| Name | Size | NAR Size |
 				|------|-----:|---------:|
 			EOF
-			json_to_md_rows "packages" "$1"
-			echo
-		fi
-	fi
+      json_to_md_rows "packages" "$1"
+      echo
+    fi
+  fi
 }
 
 # Test outside CI
 if [ "${CI:-false}" != 'true' ]; then
-	markdown_from_report "$@"
-	exit 0
+  markdown_from_report "$@"
+  exit 0
 fi
 
 # Protect against running before a PR is made or if it is triggered on the main branch
 if [ -z "$PR_ID" ]; then
-	warn "No PR created for this commit"
-	exit 0
+  warn "No PR created for this commit"
+  exit 0
 fi
 
 log 'Generating comment body'
@@ -137,19 +137,19 @@ log "$data"
 endgroup
 
 if [ -z "$COMMENT_ID" ]; then
-	log 'Posting new comment'
-	curl -o - -X 'POST' \
-		"$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/issues/$PR_ID/comments" \
-		-H 'accept: application/json' \
-		-H "Authorization: token $GITHUB_TOKEN" \
-		-H 'Content-Type: application/json' \
-		-d "$data"
+  log 'Posting new comment'
+  curl -o - -X 'POST' \
+    "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/issues/$PR_ID/comments" \
+    -H 'accept: application/json' \
+    -H "Authorization: token $GITHUB_TOKEN" \
+    -H 'Content-Type: application/json' \
+    -d "$data"
 else
-	log "Editing comment $COMMENT_ID"
-	curl -o - -X 'PATCH' \
-		"$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/issues/$PR_ID/comments/$COMMENT_ID" \
-		-H 'accept: application/json' \
-		-H "Authorization: token $GITHUB_TOKEN" \
-		-H 'Content-Type: application/json' \
-		-d "$data"
+  log "Editing comment $COMMENT_ID"
+  curl -o - -X 'PATCH' \
+    "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/issues/$PR_ID/comments/$COMMENT_ID" \
+    -H 'accept: application/json' \
+    -H "Authorization: token $GITHUB_TOKEN" \
+    -H 'Content-Type: application/json' \
+    -d "$data"
 fi