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fix(base): default pandoc typst template font so PDF export works without -V mainfont
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pandoc's bundled typst template defaults the document font to an empty
tuple (font: ()), so a naked `pandoc --pdf-engine=typst` fails with
"font fallback list must not be empty". Patch the template default to
Libertinus Serif (typst's own bundled default) at build time so PDF
export works out of the box. Document usage in README and note the fix
in CHANGELOG (Unreleased). Base-affecting.
This commit is contained in:
pi
2026-07-11 20:55:50 +02:00
parent fa6e9dc9d6
commit 3d46c6615e
3 changed files with 48 additions and 2 deletions
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Dockerfile.base
+11 -2
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@@ -14,7 +14,7 @@
# content-addressed over this file, so any byte change invalidates the
# cache. Recommended cadence: once per release for security updates.
#
# BASE_REBUILD_DATE: 2026-07-11 (Unreleased — typst PDF engine + xz-utils)
# BASE_REBUILD_DATE: 2026-07-11 (Unreleased — typst PDF engine + xz-utils + pandoc typst-template default-font patch)
#
# ── Lineage note ─────────────────────────────────────────────────────
# Adapted from opencode-devbox/Dockerfile.base (commit before v1.16.2).
@@ -465,6 +465,13 @@ RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "aarch64"
# typst ships a `.tar.xz` asset (hence xz-utils in the apt layer above)
# that extracts to typst-<arch>-unknown-linux-musl/typst. Pin a specific
# tag with --build-arg TYPST_VERSION=vX.Y.Z.
#
# We also patch pandoc's bundled typst template
# (/usr/share/pandoc/data/templates/template.typst): its conf() defaults the
# document font to an empty tuple (`font: ()`), so a naked
# `pandoc --pdf-engine=typst` fails with "font fallback list must not be empty"
# unless the caller passes `-V mainfont=...`. We default it to Libertinus Serif
# (typst's own bundled default font) so PDF export works out-of-the-box.
ARG TYPST_VERSION=latest
RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "aarch64" ;; *) echo "x86_64" ;; esac) && \
V="${TYPST_VERSION}" && \
@@ -476,7 +483,9 @@ RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "aarch64"
curl -fsSL --retry 5 --retry-delay 5 --retry-all-errors "https://github.com/typst/typst/releases/download/v${V}/typst-${ARCH}-unknown-linux-musl.tar.xz" | tar -xJ -C /tmp && \
install /tmp/typst-${ARCH}-unknown-linux-musl/typst /usr/local/bin/typst && \
rm -rf /tmp/typst-${ARCH}-unknown-linux-musl && \
typst --version
typst --version && \
sed -i 's/^ font: (),$/ font: ("Libertinus Serif",),/' /usr/share/pandoc/data/templates/template.typst && \
grep -q 'font: ("Libertinus Serif",),' /usr/share/pandoc/data/templates/template.typst
# ── yq (mikefarah) — YAML processor, jq's companion for YAML ─────────
# Installed as the mikefarah Go binary — NOT Debian's `yq` apt package, which