EazyHood · Nov 7, 2026 · Nov 7, 2026 · Nov 12, 2026
diff --git a/.github/workflows/latexmk.yml b/.github/workflows/latexmk.yml
@@ -19,11 +19,10 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v7
-      - run: make test-download
-      - run: wget -O molot-regular.ttf https://www.yegor256.com/fonts/molot/molot-regular.ttf
+      - run: make test-download test-assets molot-regular.ttf logo.svg palette.tex
       - uses: yegor256/latexmk-action@0.20.0
         with:
-          opts: -pdf
+          opts: -pdf brand-book.tex
           debs: fonts-noto-core fonts-noto-extra fonts-paratype
           depends: DEPENDS.txt
       - uses: actions/upload-artifact@v7

diff --git a/Makefile b/Makefile
@@ -4,14 +4,17 @@
 .SHELLFLAGS=-e -o pipefail -c
 .ONESHELL:
 SHELL=bash
-.PHONY: all test test-download clean
+.PHONY: all test test-download test-assets clean FORCE
 
 all: brand-book.pdf
 
-test: test-download brand-book.pdf
+test: test-download test-assets brand-book.pdf
 	texsc brand-book.tex
 	texqc brand-book
 
+test-assets:
+	bash test-assets.sh
+
 test-download:
 	bash test-font-download.sh Makefile
 
@@ -21,8 +24,34 @@ molot-regular.ttf:
 	wget -O "$$tmp" https://www.yegor256.com/fonts/molot/$@
 	mv "$$tmp" "$@"
 
-brand-book.pdf: brand-book.tex molot-regular.ttf .latexmkrc
+logo.svg: FORCE
+	temp=$$(mktemp "$@.XXXXXX")
+	trap 'rm -f "$${temp}"' EXIT
+	wget --quiet -O "$${temp}" https://www.zerocracy.com/svg/logo.svg
+	if ! cmp -s "$${temp}" "$@"; then
+		mv "$${temp}" "$@"
+	fi
+
+palette.css: FORCE
+	temp=$$(mktemp "$@.XXXXXX")
+	trap 'rm -f "$${temp}"' EXIT
+	wget --quiet -O "$${temp}" https://www.zerocracy.com/css/palette.css
+	if ! cmp -s "$${temp}" "$@"; then
+		mv "$${temp}" "$@"
+	fi
+
+palette.tex: palette.css Makefile
+	temp=$$(mktemp "$@.XXXXXX")
+	trap 'rm -f "$${temp}"' EXIT
+	grep -oE '\.[a-zA-Z0-9_-]+\{color:.[0-9a-fA-F]+' < "$<" | sed -E 's/\.([a-zA-Z0-9_-]+)\{color:.([0-9a-fA-F]+)/\\definecolor{\1}{HTML}{\2}/' > "$${temp}"
+	if ! cmp -s "$${temp}" "$@"; then
+		mv "$${temp}" "$@"
+	fi
+
+brand-book.pdf: brand-book.tex molot-regular.ttf .latexmkrc logo.svg palette.tex
 	latexmk -pdf -latexoption=-interaction=nonstopmode -latexoption=-halt-on-error $<
 
+FORCE:
+
 clean:
 	git clean -dfX
diff --git a/README.md b/README.md
@@ -11,6 +11,10 @@ To build it, just run:
 make
 ```
 
+Make refreshes `logo.svg` and `palette.css` from the Zerocracy website and
+generates `palette.tex` before checking whether the PDF needs rebuilding.
+Unchanged files keep their timestamps.
+
 You need to have
 [`latexmk`](https://ctan.org/pkg/latexmk),
 [`inkscape`](https://inkscape.org/),
@@ -34,3 +38,5 @@ Ruby, and the
 [`texsc`](https://rubygems.org/gems/texsc)
 and
 [`texqc`](https://rubygems.org/gems/texqc) gems.
+
+The asset refresh regressions can also run without LaTeX: `make test-assets`.
diff --git a/brand-book.tex b/brand-book.tex
@@ -9,8 +9,6 @@
 \usepackage{booktabs}
 \usepackage{csquotes}
 \usepackage{textcomp}
-\usepackage{iexec}
-  \iexec[quiet,log]{wget -nc --quiet https://www.zerocracy.com/svg/logo.svg}
 \usepackage{href-ul}
 \usepackage{svg}
 \usepackage{multicol}
@@ -19,8 +17,6 @@
 \usepackage{hyperref}
   \hypersetup{colorlinks=true,allcolors=blue}
 \usepackage{xcolor}
-  \iexec[quiet,log]{wget --quiet --no-clobber https://www.zerocracy.com/css/palette.css}
-  \iexec{grep -oE '\\.[a-zA-Z0-9_-]+\\\{color:.[0-9a-fA-F]+' < palette.css | sed -E 's/\\.([a-zA-Z0-9_-]+)\\\{color:.([0-9a-fA-F]+)/\\\\definecolor\{\\1\}\{HTML\}\{\\2\}/' > palette.tex}
   \input{palette.tex}
 \usepackage{graphicx}
   \newfontfamily\molotFont{Molot}[

diff --git a/test-assets.sh b/test-assets.sh
@@ -0,0 +1,127 @@
+#!/usr/bin/env bash
+# SPDX-FileCopyrightText: Copyright (c) 2024-2026 Zerocracy
+# SPDX-License-Identifier: MIT
+set -euo pipefail
+
+root=$(cd "$(dirname "$0")" && pwd)
+fixture=$(mktemp -d)
+trap 'rm -rf "${fixture}"' EXIT
+cp "${root}/Makefile" "${fixture}/Makefile"
+mkdir "${fixture}/bin"
+cat > "${fixture}/bin/wget" <<'WGET'
+#!/usr/bin/env bash
+set -euo pipefail
+output=''
+while [ "$#" -gt 0 ]; do
+    case "$1" in
+        -O) output=$2; shift 2 ;;
+        --quiet) shift ;;
+        https://*) url=$1; shift ;;
+        *) exit 2 ;;
+    esac
+done
+asset=${url##*/}
+printf '%s\n' "${asset}" >> downloads.txt
+if [ "${FAIL_DOWNLOAD:-}" = "${asset}" ]; then
+    printf 'partial download' > "${output}"
+    exit 8
+fi
+case "${asset}" in
+    logo.svg|palette.css) cp "${REMOTE}/${asset}" "${output}" ;;
+    molot-regular.ttf) printf 'test font' > "${output}" ;;
+    *) exit 2 ;;
+esac
+WGET
+cat > "${fixture}/bin/latexmk" <<'LATEXMK'
+#!/usr/bin/env bash
+set -euo pipefail
+source=${!#}
+printf '%s\n' "${source}" >> builds.txt
+cat logo.svg palette.tex > "${source%.tex}.pdf"
+LATEXMK
+chmod +x "${fixture}/bin/wget" "${fixture}/bin/latexmk"
+export PATH="${fixture}/bin:${PATH}"
+export REMOTE="${fixture}/remote"
+mkdir "${REMOTE}"
+cd "${fixture}"
+pdfs=(brand-book.pdf)
+touch molot-regular.ttf
+touch -t 200001010000 .latexmkrc
+
+check_pdfs() {
+    cat logo.svg palette.tex > expected.pdf
+    for pdf in "${pdfs[@]}"; do
+        cmp expected.pdf "${pdf}"
+    done
+}
+
+printf 'old logo' > logo.svg
+printf '.steel{color:#010203}\n' > palette.css
+printf '\\definecolor{steel}{HTML}{010203}\n' > palette.tex
+touch -t 200001010000 logo.svg palette.css palette.tex molot-regular.ttf Makefile
+for pdf in "${pdfs[@]}"; do
+    touch -t 200001010000 "${pdf%.pdf}.tex"
+    printf 'old PDF' > "${pdf}"
+    touch -t 200001010001 "${pdf}"
+done
+printf 'first remote logo' > "${REMOTE}/logo.svg"
+printf '.steel{color:#A1b2C3}\n.red{color:#112233}\n' > "${REMOTE}/palette.css"
+make --no-print-directory -j2 all
+cmp "${REMOTE}/logo.svg" logo.svg
+printf '\\definecolor{steel}{HTML}{A1b2C3}\n\\definecolor{red}{HTML}{112233}\n' > expected.tex
+cmp expected.tex palette.tex
+check_pdfs
+test "$(wc -l < builds.txt)" -eq "${#pdfs[@]}"
+test "$(grep -c '^logo.svg$' downloads.txt)" -eq 1
+test "$(grep -c '^palette.css$' downloads.txt)" -eq 1
+
+for asset in logo.svg palette.css palette.tex; do
+    touch -r "${asset}" "${asset}.timestamp"
+done
+make --no-print-directory all
+for asset in logo.svg palette.css palette.tex; do
+    test ! "${asset}" -nt "${asset}.timestamp"
+    test ! "${asset}.timestamp" -nt "${asset}"
+done
+test "$(wc -l < builds.txt)" -eq "${#pdfs[@]}"
+
+printf '.steel{color:#445566}\n' > "${REMOTE}/palette.css"
+make --no-print-directory all
+printf '\\definecolor{steel}{HTML}{445566}\n' > expected.tex
+cmp expected.tex palette.tex
+check_pdfs
+test "$(wc -l < builds.txt)" -eq "$((2 * ${#pdfs[@]}))"
+printf 'updated remote logo' > "${REMOTE}/logo.svg"
+make --no-print-directory all
+check_pdfs
+test "$(wc -l < builds.txt)" -eq "$((3 * ${#pdfs[@]}))"
+
+for asset in logo.svg palette.css; do
+    if FAIL_DOWNLOAD=${asset} make --no-print-directory all; then
+        echo "A failed ${asset} download must fail the build" >&2
+        exit 1
+    fi
+    cmp "${REMOTE}/${asset}" "${asset}"
+    check_pdfs
+    test "$(wc -l < builds.txt)" -eq "$((3 * ${#pdfs[@]}))"
+    test -z "$(find . -name "${asset}.??????" -print)"
+done
+
+printf 'invalid palette' > "${REMOTE}/palette.css"
+if make --no-print-directory all; then
+    echo 'A palette without color definitions must fail the build' >&2
+    exit 1
+fi
+cmp expected.tex palette.tex
+check_pdfs
+test "$(wc -l < builds.txt)" -eq "$((3 * ${#pdfs[@]}))"
+test -z "$(find . -name 'palette.tex.??????' -print)"
+
+printf '.steel{color:#445566}\n' > "${REMOTE}/palette.css"
+rm logo.svg palette.css palette.tex molot-regular.ttf
+make --no-print-directory molot-regular.ttf logo.svg palette.tex
+cmp "${REMOTE}/logo.svg" logo.svg
+cmp expected.tex palette.tex
+test -s molot-regular.ttf
+test "$(wc -l < builds.txt)" -eq "$((3 * ${#pdfs[@]}))"
+echo 'PASS: remote assets refresh, unchanged content skips rebuild, failures preserve generated output, CI assets prepare without LaTeX'