Pierre Hauweele (pha) · a3fc980d · a3fc980d
--- a/pdfreorder
+++ b/pdfreorder
 #!/usr/bin/env bash

-# Usage: $0 fichier.pdf <liste_matricules
-
-# chaque ligne de liste_matricules est le matricule d'une page du pdf
+err() {
+  echo -e "$@" >&2
--- a/pdfreorder
+++ b/pdfreorder
+  err "$@"
+  exit 1
 }
-warn() {
-    printf >&2 "%s\n" "$*"
+
+badusage() {
+  usage
+  die "\nBad usage:\n$*"
 }

-say() {
-    printf "%s\n" "$*"
+on_exit() {
+  # Cleanup temp files
+  if [ -n "$tmp_pdf_file" ] && [ -e "$tmp_pdf_file" ]
--- a/pdfreorder
+++ b/pdfreorder
+  if [ -n "$tmp_pdf_file" ] && [ -e "$tmp_pdf_file" ]
+  then
+    rm "$tmp_pdf_file"
+  fi
+  if [ -n "$tmp_toc" ] && [ -e "$tmp_toc" ]
+  then
+    rm "$tmp_toc"
+  fi
 }
-export -f say warn die
+
+trap on_exit EXIT
+
+# pdfjam is a strong dependency.
+hash pdfjam 2>/dev/null ||
+# pdftk is a soft dependency.
--- a/pdfreorder
+++ b/pdfreorder
-  selon cette clé, du pdf d'entrée. Le tri est stable.
+  cat >&2 <<EOF
+usage: $(basename "$0") [options...] <PDF-FILE> <KEYS-FILE>
+
+Reorder the given PDF-FILE in the sorted order of the keys in KEYS-FILE and
+write the resulting pdf to another PDF file.
+
+KEYS-FILE is a list of "key page_start page_end" or "key page_start" or "key".
+
+The sort on the keys is numeric and stable.
+
+-h  Display this message
+-o  Set the output file. Defaults to PDF-FILE with the ".reordered.pdf"
+    extension.
+-1  Set the input PDF to be a one-sided scan (one key per page).
+-2  Set the input PDF to be a two-sided scan (one key for two pages) (this is the default).
--- a/pdfreorder
+++ b/pdfreorder
+[[ -e "$pdf_file" ]] || die "$pdf_file does not exist."
+[[ -f "$pdf_file" ]] || die "$pdf_file is not a file."
+[[ -r "$pdf_file" ]] || die "$pdf_file is not readable."
+
+[[ $(mimetype -L -b -M "$pdf_file") == "application/pdf" ]] ||
+  badusage "$pdf_file does not seem to be a PDF file."
+
+[[ -e "$keys_file" ]] || die "$keys_file does not exist."
+[[ -r "$keys_file" ]] || die "$keys_file is not readable."
+[[ -f "$keys_file" || -c "$keys_file" ]] ||
+  die "$keys_file is not a file nor a character device."
+
+[[ -e "$output_file" ]] && die "error: $output_file already exists"
+
+# Find the number of pages in the PDF file using multiple fallbacks.
+if hash pdftk 2>/dev/null; then
--- a/pdfreorder
+++ b/pdfreorder
-pdffile=$1
-numPage=1
+[[ -z "$num_pages" ]] && \
+  die "error: failed to read the number of pages of $pdf_file."
+
+
+# Reorder the PDF.
+
+declare -A keys
+declare -A keys_page_count
+
+key=""
+page_start=$((-pages_per_sheet))
+page_end=0
+
+while read -r new_key new_page_start new_page_end
--- a/pdfreorder
+++ b/pdfreorder
-
-KEYS-FILE is a list of keys, one line per pdf page (or two pdf pages for
-two-sided scan). The sort is numeric and stable.
+KEYS-FILE is a list of "key page_start page_end" or "key page_start" or "key".

-If KEYS-FILE is undefined, keys a read from stdin.
+The sort on the keys is numeric and stable.

 -h  Display this message
 -o  Set the output file. Defaults to PDF-FILE with the ".reordered.pdf"
    extension.
 -1  Set the input PDF to be a one-sided scan (one key per page).
-2  Set the input PDF to be a two-sided scan (one key for two pages).
-    If neither -1 nor -2 is set, it will be guessed from the number of pages
-    and keys.
+-2  Set the input PDF to be a two-sided scan (one key for two pages) (this is the default).
--- a/pdfreorder
+++ b/pdfreorder
-readonly numKeys

-if ((pagesPerKey == 0)); then
-  if ((numKeys * 2 == numPages)); then
-    err "Assuming a two-sided scan, one key per sheet (two pages)."\
-      "Use -1 option to force a one-sided scan."
-    pagesPerKey=2
-  else
-    pagesPerKey=1
+# Reorder the PDF.
+
+declare -A keys
+declare -A keys_page_count
+
+key=""
+page_start=$((-pages_per_sheet))