chore: import upstream snapshot with attribution

2026-07-13 13:33:56 +08:00
commit 461bf6fd40
1313 changed files with 1079898 additions and 0 deletions
@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+
+# Usage: ./split_pdf.sh filename.pdf
+
+set -e
+
+PDF_FILE="$1"
+DEFAULT_SPLIT_SIZE=5
+SPLIT_SIZE=${PDF_SPLIT_PAGE_SIZE:-$DEFAULT_SPLIT_SIZE}
+
+# Validate that SPLIT_SIZE is an integer
+if ! [[ "$SPLIT_SIZE" =~ ^[0-9]+$ ]]; then
+  echo "Error: PDF_SPLIT_PAGE_SIZE must be an integer."
+  exit 1
+fi
+
+DEFAULT_DIR="$HOME/tmp/pdf-splits"
+PDF_SPLITS_DIR="${PDF_SPLITS_DIR:-$DEFAULT_DIR}"
+PDF_NAME=$(basename "$PDF_FILE" .pdf)
+MD5_SUM=$(md5sum "$PDF_FILE" | awk '{ print $1 }')
+PDF_DIR="$PDF_SPLITS_DIR/$PDF_NAME-${MD5_SUM}_split-${SPLIT_SIZE}"
+
+# Create directory if it does not exist
+mkdir -p "$PDF_DIR"
+
+# Total number of pages
+TOTAL_PAGES=$(qpdf --show-npages "$PDF_FILE")
+
+# Split PDF into $SPLIT_SIZE-page chunks
+START_PAGE=1
+while [ "$START_PAGE" -le "$TOTAL_PAGES" ]; do
+  END_PAGE=$((START_PAGE + SPLIT_SIZE - 1))
+  if [ "$END_PAGE" -gt "$TOTAL_PAGES" ]; then
+    END_PAGE=$TOTAL_PAGES
+  fi
+  OUTPUT_FILE="$PDF_DIR/${PDF_NAME}_pages_${START_PAGE}_to_${END_PAGE}.pdf"
+  qpdf "$PDF_FILE" --pages . "$START_PAGE"-"$END_PAGE" -- "$OUTPUT_FILE"
+  echo "Created $OUTPUT_FILE"
+  START_PAGE=$((END_PAGE + 1))
+done
+
+echo "All parts have been saved to $PDF_DIR"