CI: harden the cache.yml graphviz step too; two attempts with wider per-attempt timeouts (4m/14m)

Addresses Copilot review on QuantEcon/lecture-python.zh-cn#263: the cache.yml graphviz step was missed by a name match, and three 3m/9m attempts could never let a slow-but-progressing install finish. Now two attempts at 4m (graphviz) / 14m (texlive) inside the unchanged 10/30-minute step budgets.

Author: mmcky

.github/workflows/cache.yml

@@ -22,17 +22,25 @@ jobs:
           environment-file: environment.yml
           activate-environment: quantecon
       - name: graphviz Support # TODO: required?
+        timeout-minutes: 10
         run: |
-          sudo apt-get -qq update && sudo apt-get install -y graphviz
+          # Retried with a per-attempt timeout: a stalled Ubuntu mirror otherwise
+          # hangs this step for hours (two 358-minute hangs on 2026-08-18).
+          pkgs="graphviz"
+          for attempt in 1 2; do
+            timeout 4m sudo bash -c "apt-get -qq update && apt-get install -y $pkgs" && break
+            if [ "$attempt" = 2 ]; then echo "apt-get failed after 2 attempts"; exit 1; fi
+            echo "apt-get attempt $attempt failed; retrying in 30s"; sleep 30
+          done
       - name: Install latex dependencies
         timeout-minutes: 30
         run: |
           # Retried with a per-attempt timeout: a stalled Ubuntu mirror otherwise
           # hangs this step for hours (two 358-minute hangs on 2026-08-18).
           pkgs="texlive-latex-recommended texlive-latex-extra texlive-fonts-recommended texlive-fonts-extra texlive-xetex latexmk xindy dvipng cm-super"
-          for attempt in 1 2 3; do
-            timeout 9m sudo bash -c "apt-get -qq update && apt-get install -y $pkgs" && break
-            if [ "$attempt" = 3 ]; then echo "apt-get failed after 3 attempts"; exit 1; fi
+          for attempt in 1 2; do
+            timeout 14m sudo bash -c "apt-get -qq update && apt-get install -y $pkgs" && break
+            if [ "$attempt" = 2 ]; then echo "apt-get failed after 2 attempts"; exit 1; fi
             echo "apt-get attempt $attempt failed; retrying in 30s"; sleep 30
           done
       - name: Build HTML

.github/workflows/ci.yml

@@ -23,9 +23,9 @@ jobs:
           # Retried with a per-attempt timeout: a stalled Ubuntu mirror otherwise
           # hangs this step for hours (two 358-minute hangs on 2026-08-18).
           pkgs="graphviz"
-          for attempt in 1 2 3; do
-            timeout 3m sudo bash -c "apt-get -qq update && apt-get install -y $pkgs" && break
-            if [ "$attempt" = 3 ]; then echo "apt-get failed after 3 attempts"; exit 1; fi
+          for attempt in 1 2; do
+            timeout 4m sudo bash -c "apt-get -qq update && apt-get install -y $pkgs" && break
+            if [ "$attempt" = 2 ]; then echo "apt-get failed after 2 attempts"; exit 1; fi
             echo "apt-get attempt $attempt failed; retrying in 30s"; sleep 30
           done
       - name: Install latex dependencies
@@ -34,9 +34,9 @@ jobs:
           # Retried with a per-attempt timeout: a stalled Ubuntu mirror otherwise
           # hangs this step for hours (two 358-minute hangs on 2026-08-18).
           pkgs="texlive-latex-recommended texlive-latex-extra texlive-fonts-recommended texlive-fonts-extra texlive-xetex latexmk xindy dvipng cm-super"
-          for attempt in 1 2 3; do
-            timeout 9m sudo bash -c "apt-get -qq update && apt-get install -y $pkgs" && break
-            if [ "$attempt" = 3 ]; then echo "apt-get failed after 3 attempts"; exit 1; fi
+          for attempt in 1 2; do
+            timeout 14m sudo bash -c "apt-get -qq update && apt-get install -y $pkgs" && break
+            if [ "$attempt" = 2 ]; then echo "apt-get failed after 2 attempts"; exit 1; fi
             echo "apt-get attempt $attempt failed; retrying in 30s"; sleep 30
           done
       - name: Display Conda Environment Versions

.github/workflows/publish.yml

@@ -42,9 +42,9 @@ jobs:
           # Retried with a per-attempt timeout: a stalled Ubuntu mirror otherwise
           # hangs this step for hours (two 358-minute hangs on 2026-08-18).
           pkgs="texlive-latex-recommended texlive-latex-extra texlive-fonts-recommended texlive-fonts-extra texlive-xetex latexmk xindy dvipng cm-super"
-          for attempt in 1 2 3; do
-            timeout 9m sudo bash -c "apt-get -qq update && apt-get install -y $pkgs" && break
-            if [ "$attempt" = 3 ]; then echo "apt-get failed after 3 attempts"; exit 1; fi
+          for attempt in 1 2; do
+            timeout 14m sudo bash -c "apt-get -qq update && apt-get install -y $pkgs" && break
+            if [ "$attempt" = 2 ]; then echo "apt-get failed after 2 attempts"; exit 1; fi
             echo "apt-get attempt $attempt failed; retrying in 30s"; sleep 30
           done
       - name: Display Conda Environment Versions