Quarto: use prerelease JSON method (amd64) exactly as requested; remove previous stable/fallback logic.

Author: cailmdaley

Dockerfile

@@ -88,22 +88,12 @@ RUN set -eux; \
     # cleanup \
     apt-get autoremove -y && rm -rf /var/lib/apt/lists/*
 
-# Quarto (for scientific writing) — latest AMD64 build
+# Quarto (for scientific writing) — prerelease channel, AMD64
 RUN set -eux; \
-    STABLE_URL="https://github.com/quarto-dev/quarto-cli/releases/latest/download/quarto-linux-amd64.deb"; \
-    TMP_DEB="/tmp/quarto-linux-amd64.deb"; \
-    if ! curl -fL --retry 5 --retry-all-errors -o "$TMP_DEB" "$STABLE_URL"; then \
-      echo "Stable Quarto download failed; trying prerelease channel"; \
-      PRE_URL=$(curl -fsSL https://quarto.org/docs/download/_prerelease.json \
-        | sed -n 's/.*"download_url"[[:space:]]*:[[:space:]]*"\([^"']*amd64\.deb\)".*/\1/p' \
-        | head -n1); \
-      test -n "$PRE_URL"; \
-      curl -fL --retry 5 --retry-all-errors -o "$TMP_DEB" "$PRE_URL"; \
-    fi; \
-    apt-get update -y --quiet; \
-    apt-get install -y --quiet --no-install-recommends "$TMP_DEB"; \
-    rm -f "$TMP_DEB" && \
-    apt-get autoremove -y && rm -rf /var/lib/apt/lists/*
+    ARCH=amd64; \
+    curl -L "$(curl -fsSL https://quarto.org/docs/download/_prerelease.json | grep -oP "(?<=\\\"download_url\\\":\\s\\\")https.*${ARCH}\\.deb")" -o /tmp/quarto.deb; \
+    dpkg -i /tmp/quarto.deb; \
+    rm /tmp/quarto.deb
 
 # Python dependencies (relaxed pins for rapid development) + Snakemake
 RUN python -m pip install --no-cache-dir --upgrade pip setuptools wheel && \