fix(ci): upload plain ISO directly, skip zstd compression

Compression was 5.3 GiB -> 5.2 GiB (98.6%) — negligible savings for
the extra build time. Upload the .iso directly as a release asset.

.gitea/workflows/build-iso.yaml

@@ -24,12 +24,12 @@ jobs:
           set -euo pipefail
           mkdir -p /tmp/localrepo
           cp localrepo/*.pkg.tar.zst localrepo/local-aur.db* localrepo/local-aur.files* /tmp/localrepo/
-          sed -i 's|file:///home/alvin/alvinarch/localrepo|file:///tmp/localrepo|' pacman.conf
+          sed -i 's|file:///home/alvin/AlvinArch/localrepo|file:///tmp/localrepo|' pacman.conf
 
       - name: Install archiso and dependencies
         run: |
           set -euo pipefail
-          pacman -Syu --noconfirm --needed archiso jq zstd
+          pacman -Syu --noconfirm --needed archiso jq
 
       - name: Ensure /dev/stdin exists for mkinitcpio
         run: |
@@ -102,15 +102,13 @@ jobs:
             exit 1
           fi
 
-          # Collect the ISOs produced by the build
+          # Collect the ISOs produced by the build and record SHA-256
           isos=(out/*.iso)
           if (( ${#isos[@]} == 0 )); then
             echo "❌ No ISO found in out/ — nothing to upload, aborting." >&2
             exit 1
           fi
 
-          # Compress each ISO with zstd and record its SHA-256
-          zst_files=()
           sha256sums=()
           for iso in "${isos[@]}"; do
             fname=$(basename "$iso")
@@ -120,19 +118,15 @@ jobs:
               echo "❌ '$iso' is only $size bytes — refusing to upload (not an ISO)." >&2
               exit 1
             fi
-
-            echo "Compressing $fname ($(( size / 1024 / 1024 )) MiB) with zstd..."
-            zstd -T0 -19 -f "$iso" -o "$iso.zst" --rm
-            sha=$(sha256sum "$iso.zst" | awk '{print $1}')
-            echo "  ✅ ${fname}.zst: $(( $(stat -c %s "$iso.zst") / 1024 / 1024 )) MiB, sha256=$sha"
-            zst_files+=("$iso.zst")
+            sha=$(sha256sum "$iso" | awk '{print $1}')
+            echo "  ✅ $fname: $(( size / 1024 / 1024 )) MiB, sha256=$sha"
             sha256sums+=("$sha")
           done
 
           # Build the release body with SHA-256 checksums
           printf -v body 'Arch Linux live ISO %s\n\nChecksums (SHA-256):\n' "$RELEASE_NAME"
-          for i in "${!zst_files[@]}"; do
-            printf -v line -- '- `%s`: sha256 `%s`\n' "$(basename "${zst_files[$i]}")" "${sha256sums[$i]}"
+          for i in "${!isos[@]}"; do
+            printf -v line -- '- `%s`: sha256 `%s`\n' "$(basename "${isos[$i]}")" "${sha256sums[$i]}"
             body+="$line"
           done
 
@@ -146,14 +140,14 @@ jobs:
             -d "$payload" | jq -er '.id')
           echo "  ✅ Created release $TAG_NAME (ID: $RELEASE_ID)"
 
-          # Upload each .zst file as a release asset
-          for i in "${!zst_files[@]}"; do
-            fname=$(basename "${zst_files[$i]}")
-            size=$(stat -c %s "${zst_files[$i]}")
+          # Upload each ISO as a release asset
+          for i in "${!isos[@]}"; do
+            fname=$(basename "${isos[$i]}")
+            size=$(stat -c %s "${isos[$i]}")
             echo "Uploading $fname ($(( size / 1024 / 1024 )) MiB) to release $TAG_NAME..."
             curl -sf -X POST \
               -H "Authorization: token $GITEA_TOKEN" \
-              -F "attachment=@${zst_files[$i]}" \
+              -F "attachment=@${isos[$i]}" \
               "$GITEA_API/repos/$REPOSITORY/releases/$RELEASE_ID/assets" | jq -er '.browser_download_url'
             echo "  ✅ Uploaded $fname"
           done
@@ -208,4 +202,3 @@ jobs:
         run: |
           set -eu
           rm -rf "$PWD/out"
-