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annotate .bash_profile @ 14:94cfcec3b5b6

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When bash is called non-interactively, PS1 is unset. However, if it's a login shell, ~/.bash_profile is still sourced. Therefore, testing PS1 tells us if this is a login but non-interactive shell (such as: ssh host 'uptime'). Testing PS1 before setting it preserves that state for later tests if desired.
author huston@80426f53-59d1-405d-934b-f07cd76f4a1a
date Sun, 30 Aug 2009 06:49:10 +0000
parents dacbbae5965c
children fe83d9892ee3
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1 # .bash_profile
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2 # This file is sourced for interactive login shells, or
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3 # non-interactive shells with the --login option. So things which you
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4 # want to happen only on login shells should go here.
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6 # Get the aliases and functions
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7 if [ -f ~/.bashrc ]; then
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8 . ~/.bashrc
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9 fi
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11 # User specific environment and startup programs
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12
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13 # BASH_ENV is sourced for non-interactive shells; however, since we
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14 # source ~/.bashrc above I don't think we have to here also.
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15 # export BASH_ENV=$HOME/.bashrc
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17 # These lines are helpful if you routinely might login without passing an
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18 # ssh-agent's authentication through. This way when you login, an agent is
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19 # exec'd for you (the corresponding lines in .bash_logout should kill the
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20 # agent when you logout, however they sometimes fail such as when killing your
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21 # shell without a proper logout or closing the connection). I left it here,
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22 # though I personally don't use/need it anymore.
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24 #if [ "X$SSH_AUTH_SOCK" = "X" ] ; then
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25 # eval `/usr/bin/ssh-agent`
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26 #fi
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28 # This part is quite useful if you have your dotfiles stored in subversion
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29 # (though it could be edited fairly easily for any other version control
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30 # system I'm sure). We check the timestamp of the file '$HOME/.dotfilets'.
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31 # If it's older than a month, run a 'svn st -u' and touch it; this way we
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32 # check once per month to see if we forgot to pull down an updated version.
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34 # First set $STAT and $DATE since the syntax of the commands is different
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35 # between Linux and Mac OS X. If this is run elsewhere, the eval will be
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36 # false and the test not done below, so it's safe to not bother checking for
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37 # zero-length variables on the test - it just won't run the svn status, so you
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38 # won't be prompted if there's newer files available in your repository.
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40 [[ `uname` == "Darwin" ]] && {
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41 STAT="stat -f %m -t %s $HOME/.dotfilets"
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42 DATE="date -v -1m +%s"
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43 }
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45 [[ `uname` == "Linux" ]] && {
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46 STAT="stat -c %Y $HOME/.dotfilets"
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47 DATE="date -d \"1 month ago\" +%s"
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48 }
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50 [[ ! -f $HOME/.dotfilets || \
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51 `eval $STAT` -lt `eval $DATE` ]] && {
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52 echo Dotfiles last checked over a month ago, running a status test.
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53 svn st -u && touch $HOME/.dotfilets &
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54 }