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1 #!/usr/bin/env bash |
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2 # |
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3 # Author: Alexander Krauss |
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4 # |
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5 # Computes and validates checksums for the Isabelle component repository |
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6 |
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7 THIS="$(cd $(dirname "$0"); pwd)" |
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8 |
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9 function usage() |
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10 { |
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11 echo |
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12 echo "Usage: $0 [OPTIONS] [DIR]" |
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13 echo |
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14 echo " Options are:" |
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15 echo " -u update the recorded checksums in the repository" |
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16 echo " -c compare the actual checksums with the recorded ones" |
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17 echo |
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18 echo " Compute the checksums of components in DIR (default '/home/isabelle/components')" |
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19 echo " and synchronize them with the Isabelle repository." |
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20 echo |
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21 exit 1 |
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22 } |
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23 |
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24 function fail() |
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25 { |
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26 echo "$1" >&2 |
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27 exit 2 |
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28 } |
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29 |
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30 |
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31 ## process command line |
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32 |
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33 # options |
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34 |
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35 UPDATE="" |
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36 CHECK="" |
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37 COMPONENTS_DIR="/home/isabelle/components" |
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38 |
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39 while getopts "uc" OPT |
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40 do |
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41 case "$OPT" in |
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42 u) |
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43 UPDATE=true |
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44 ;; |
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45 c) |
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46 CHECK=true |
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47 ;; |
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48 esac |
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49 done |
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50 |
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51 shift $(($OPTIND - 1)) |
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52 |
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53 [ -n "$UPDATE" ] || [ -n "$CHECK" ] || usage |
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54 |
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55 # args |
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56 |
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57 [ "$#" -ge 1 ] && { COMPONENTS_DIR="$1"; shift; } |
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58 [ "$#" -ne 0 ] && usage |
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59 |
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60 |
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61 ## compute checksums |
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62 |
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63 CHECKSUM_FILE="$THIS/components.sha1" |
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64 CHECKSUM_TMP="$THIS/components.sha1.tmp" |
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65 |
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66 cd "$COMPONENTS_DIR" |
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67 sha1sum *.tar.gz > "$CHECKSUM_TMP" |
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68 |
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69 [ -n "$UPDATE" ] && mv "$CHECKSUM_TMP" "$CHECKSUM_FILE" |
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70 [ -n "$CHECK" ] && (diff "$CHECKSUM_FILE" "$CHECKSUM_TMP" || fail "Integrity error") |