Mercurial > hg > config
annotate bin/example/self-writing.sh @ 353:ee8ab3de9c7f
f-ing print
| author | Jeff Hammel <jhammel@mozilla.com> |
|---|---|
| date | Thu, 27 Jun 2013 02:41:53 -0700 |
| parents | aae9b0776e60 |
| children |
| rev | line source |
|---|---|
| 320 | 1 #!/bin/bash |
| 2 | |
| 3 # illustrate self-writing script (example) | |
| 321 | 4 # This one does something hard and replaces dynamic data with sed. |
| 5 # Other solutions (magic markers, etc) are possible | |
| 320 | 6 |
| 321 | 7 path=`readlink -f $0` |
| 327 | 8 mode=`stat --format '%a' ${path}` |
| 9 tmp=`tempfile --mode ${mode}` | |
| 321 | 10 datestamp=`date` |
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326
dbb6ef0c9a26
ya gotta update your nonce
Jeff Hammel <jhammel@mozilla.com>
parents:
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diff
changeset
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11 nonce="This script last generated at " |
| 321 | 12 |
| 323 | 13 # sanity check |
| 14 if [[ ! -w "${path}" ]] | |
| 15 then | |
| 16 echo "You don't have write permission for script ${path}" | |
| 17 exit 1 | |
| 18 fi | |
| 19 | |
| 321 | 20 # avoiding -i for safety |
| 21 sed 's/\(echo \"'"${nonce}"'\).*\"/\1'"${datestamp}"'\"/' ${path} > ${tmp} | |
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hopefully finished....we shall see!
Jeff Hammel <jhammel@mozilla.com>
parents:
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22 if [[ ! -e "${tmp}" ]] |
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ae1346f776c3
hopefully finished....we shall see!
Jeff Hammel <jhammel@mozilla.com>
parents:
323
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changeset
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23 then |
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ae1346f776c3
hopefully finished....we shall see!
Jeff Hammel <jhammel@mozilla.com>
parents:
323
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24 echo "Temporary file creation not successful" |
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ae1346f776c3
hopefully finished....we shall see!
Jeff Hammel <jhammel@mozilla.com>
parents:
323
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25 exit 1 |
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ae1346f776c3
hopefully finished....we shall see!
Jeff Hammel <jhammel@mozilla.com>
parents:
323
diff
changeset
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26 fi |
| 321 | 27 |
| 322 | 28 # echo last and current generation times for example |
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aae9b0776e60
another commit just to avoid a pointless traversal of non-tracked items
Jeff Hammel <jhammel@mozilla.com>
parents:
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29 echo "This script last generated at Sat Jun 8 08:52:35 PDT 2013" |
| 323 | 30 echo "Now: ${datestamp}" |
| 31 | |
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324
ae1346f776c3
hopefully finished....we shall see!
Jeff Hammel <jhammel@mozilla.com>
parents:
323
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32 # move tmpfile -> script location via exec |
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ae1346f776c3
hopefully finished....we shall see!
Jeff Hammel <jhammel@mozilla.com>
parents:
323
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33 exec mv ${tmp} ${path} |