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@fakuivan
Created March 6, 2021 20:53
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Small script to port xcas program changes made throughout hp prime backups to a git repo
#!/usr/bin/env bash
decode_hp_xcas_program () {
python3.8 -c '
import sys
enc = "utf-16le"
delims = ("#cas".encode(enc), "#end".encode(enc))
print(((lambda conts: conts[conts.find(delims[0])+len(delims[0]):conts.rfind(delims[1])])(
open(sys.argv[1], mode="rb").read())).decode(enc))' \
"$1"
}
extract_and_decode_backup () {
local backup_file="$1"
local extracted
extracted="$(mktemp -d)" || return $?
trap 'rm -rf "$extracted"' RETURN
unzip -d "$extracted" -- "$backup_file" || return $?
for program in "$extracted"/*.hpprgm; do
echo "Decoding ${program@Q}"
decode_hp_xcas_program "$program" > "${program%.*}.xcas" || return $?
cp "${program%.*}.xcas" . || return $?
done
}
# In my case these all happen to be ordered by date from old to new
# that way changes get commited in the right order
for bkp_file in ../*.zip; do
rm -- * &&
backup_date="$(stat -c '%y' -- "$backup_file")" &&
extract_and_decode_backup "$bkp_file" &&
git add . &&
git commit -m "Add history from backup" --date "$backup_date"
done
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