mdw@git.distorted.org.uk Git - profile/blob - dot/bashrc

   1 ### -*-bash-*-
   2 ###
   3 ### Bash session things
   4
   5 ## Only do this if we haven't done it before.  (Note that this guard isn't
   6 ## exported, so subshells will need to make their own arrangements.)
   7 if [ -z "$__mdw_bashrc" ]; then
   8 __mdw_bashrc=done
   9
  10 ## If we've not run the main profile yet, we should do that first.  It sets
  11 ## up things we rely on.  Also, if there's a system script, we should run
  12 ## that too.
  13 [ -z "$__mdw_profile" -a -r $HOME/.bash_profile ] && . $HOME/.bash_profile
  14 [ -r /etc/bashrc ] && . /etc/bashrc
  15
  16 ## Completion.
  17 [ -r /etc/bash_completion ] && . /etc/bash_completion
  18 [ -r $HOME/.bash_completion ] && . $HOME/.bash_completion
  19
  20 ## Set the temporary directory again.  (If we've switched users, we'll want a
  21 ## different temporary directory.)
  22 [ "${TMPDIR+yes}" ] || eval `tmpdir -b`
  23
  24 ###--------------------------------------------------------------------------
  25 ### Prompt hacking.
  26
  27 ## Only bother if the shell is interactive.
  28 if [ -t 0 ]; then
  29
  30   ## Fancy highlighting in some terminals.
  31   marker=${STY+'\[\ek\e\\\]'}
  32   case "$TERM" in
  33     linux*|screen*|xterm*|vt100*|eterm*)
  34       case "$(tput bold)" in
  35         "") bold="\[$(tput md)\]" unbold="\[$(tput me)\]" ;;
  36         *) bold="\[$(tput bold)\]" unbold="\[$(tput sgr0)\]" ;;
  37       esac
  38       gitcolour="\[$(tput setaf 6)\]"
  39       rccolour="\[$(tput setaf 1)\]"
  40       uncolour="\[$(tput op)\]"
  41       nl="\[
\]"
  42       ;;
  43     *)
  44       bold='' unbold='' nl='' gitcolour='' rccolour='' uncolour='';;
  45   esac
  46
  47   ## Choose the right delimiters.  Highlight root prompts specially;
  48   ## highlight when I'm running as some other user.  Highlight when this
  49   ## isn't the outermost shell on the terminal.
  50   if (( EUID == 0 )); then
  51     left=`echo « | iconv -f UTF-8 -t //translit`
  52     right=`echo » | iconv -f UTF-8 -t //translit`
  53   else
  54     case $USER in
  55       mdw|mwooding|nemo) u="" left="[" right="]" ;;
  56       *) u="\\u@" left="{" right="}" ;;
  57     esac
  58     if [ "$__mdw_tty" = "`tty`" ]; then
  59       left="<" right=">"
  60     else
  61       export __mdw_tty="`tty`"
  62     fi
  63   fi
  64
  65   ## If this session is insecure then highlight that.
  66   if [ -z "$SSH_CLIENT" ] && [ -z "$SCHROOT_CHROOT_NAME" ] &&
  67      [ "$__mdw_sechost" != "`hostname`" ]
  68   then
  69     sec_l='(' sec_r=')'
  70   fi
  71
  72   ## If this is an schroot environment then point this out.
  73   hqual=""
  74   hqual="$hqual${SCHROOT_CHROOT_NAME+/$SCHROOT_CHROOT_NAME}"
  75
  76   ## Build the prompt string.
  77   if type __git_ps1 >/dev/null 2>&1; then
  78     git="$unbold$gitcolour\$(rc=\$?;__git_ps1;exit \$rc)$uncolour$bold"
  79   else
  80     git=""
  81   fi
  82   rc="$unbold$rccolour\$(rc=\$?;case \$rc in 0);;"
  83   rc="$rc*)echo -n \" rc=\$rc\";;esac;exit \$rc)$uncolour$bold"
  84   PS1="$nl$bold$left$sec_l$u\\h$hqual$sec_r \\w$git$rc$marker$right$unbold"
  85   PS2="$PS1 $bold>$unbold "
  86   unset nl bold unbold left right sec_l sec_r marker
  87   unset gitcolour rccolour uncolour git rc hqual
  88 fi
  89
  90 ###--------------------------------------------------------------------------
  91 ### Other shell tweaking.
  92
  93 ## Random shell tweaks.
  94 notify=1
  95 set -b
  96 shopt -u cdable_vars
  97 shopt -s cdspell
  98 shopt -s checkhash
  99 shopt -s checkwinsize
 100 shopt -s cmdhist
 101 shopt -u dotglob
 102 shopt -s expand_aliases
 103 shopt -s extglob
 104 if (( ${BASH_VERSINFO[0]} >= 4 )); then shopt -s globstar; fi
 105 shopt -s gnu_errfmt
 106 shopt -s histappend
 107 shopt -s histreedit
 108 shopt -u histverify
 109 shopt -s hostcomplete
 110 shopt -s huponexit
 111 shopt -s interactive_comments
 112 shopt -s lithist
 113 shopt -u mailwarn
 114 shopt -u nocaseglob
 115 shopt -u nullglob
 116 shopt -s promptvars
 117 shopt -u shift_verbose
 118 shopt -s sourcepath
 119 HISTCONTROL=ignorespace:erasedups
 120
 121 ## Some handy aliases.
 122 alias cx='chmod a+x'
 123 alias which="command -v"
 124 alias rc="rc -l"
 125 alias ssync="rsync -e ssh"
 126 rootly () {
 127   case $# in 0) set -- "${SHELL-/bin/sh}" ;; esac
 128   $__MDW_ROOTLY "$@"
 129 }
 130 alias r=rootly
 131 alias re="rootly $EDITOR"
 132 alias pstree="pstree -hl"
 133 alias cdtmp='cd ${TMPDIR-/tmp}'
 134 alias pushtmp='pushd ${TMPDIR-/tmp}'
 135 alias e="$EDITOR"
 136 alias svn="svnwrap svn"
 137 alias @="ssh"
 138
 139 ###--------------------------------------------------------------------------
 140 ### Colour output.
 141
 142 ## Arrange for `ls' output to be in colour.
 143 if [ -x /usr/bin/dircolors -o -x /usr/local/bin/dircolors ]; then
 144   eval `dircolors -b ~/.dircolors`
 145 else
 146   unset LS_COLORS
 147 fi
 148
 149 unalias ls 2>/dev/null || :; function ls () {
 150   if [ -t 1 ]; then
 151     command ls $LS_OPTIONS ${LS_COLORS+--color=auto} "$@"
 152   else
 153     command ls "$@"
 154   fi
 155 }
 156
 157 ## Arrange for `grep' output to be in colour.
 158 export GREP_COLORS="mt=01;31:ms=01;31:mc=031;31:fn=36:ln=36:bn=36:se=34"
 159
 160 greplike () {
 161   declare grep=$1; shift
 162   if [ -t 1 ]; then
 163     command $grep ${GREP_COLORS+--color=always} "$@" | mdw-pager
 164   else
 165     command $grep "$@"
 166   fi
 167 }
 168 alias grep="greplike grep"
 169 alias egrep="greplike egrep"
 170 alias fgrep="greplike fgrep"
 171 alias zgrep="greplike zgrep"
 172
 173 ## Turn off pagers inside Emacs shell buffers.
 174 case "$INSIDE_EMACS" in
 175   2[2-9].*,comint | [3-9][0-9].*,comint) export PAGER=cat ;;
 176 esac
 177
 178 ###--------------------------------------------------------------------------
 179 ### More complicated shell functions.
 180
 181 ## xt [@HOST] XTERM-ARGS
 182 ##
 183 ## Open a terminal, maybe on a remote host.
 184 xt () {
 185   case "$1" in
 186     @*)
 187       local remote=${1#@} title
 188       shift
 189       if [ $# -gt 0 ]; then
 190         title="xterm [$remote] $1"
 191       else
 192         title="xterm [$remote]"
 193       fi
 194       (xterm -title "$title" -e ssh $remote "$@" &)
 195       ;;
 196     *)
 197       (xterm "$@" &)
 198       ;;
 199   esac
 200 }
 201
 202 ## core [y|n]
 203 ##
 204 ## Tweak core dumps on and off, or show the current status.
 205 core () {
 206   case "x$1" in
 207     xon|xy|xyes) ulimit -Sc `ulimit -Hc` ;;
 208     xoff|xn|xno) ulimit -Sc 0 ;;
 209     x)
 210       local l=`ulimit -Sc`
 211       case $l in
 212         0) echo "Core dumps disabled" ;;
 213         unlimited) echo "Core dumps enabled" ;;
 214         *) echo "Core dump limit is $l blocks" ;;
 215       esac
 216       ;;
 217     *)
 218       echo >&2 "usage: core [y|n]"
 219       return 1
 220       ;;
 221   esac
 222 }
 223
 224 ## world [NAME]
 225 ##
 226 ## Set current security world to NAME.  With no NAME, print the currently
 227 ## selected world.
 228 world () {
 229   local nfast=${NFAST_HOME-/opt/nfast}
 230   local kmdata
 231   case "$#" in
 232     0)
 233       echo "${NFAST_KMDATA#$nfast/kmdata-}"
 234       ;;
 235     *)
 236       if [ -d "$1" ]; then
 237         kmdata=$1
 238       elif [ -d "$nfast/kmdata-$1" ]; then
 239         kmdata=$nfast/kmdata-$1
 240       else
 241         echo >&2 "world: can't find world $1"
 242         return 1
 243       fi
 244       shift
 245       case "$#" in
 246         0) export NFAST_KMDATA=$kmdata ;;
 247         *) "$@" ;;
 248       esac
 249       ;;
 250   esac
 251 }
 252
 253 ## Fix `man' under Slowaris.
 254 case "$MACHTYPE" in
 255   *solaris*)
 256     man () {
 257       declare -i i=0
 258       declare arg
 259       declare -a man
 260       for arg; do
 261         case "$arg" in [0-9]*) man[i+=1]="-s" ;; esac
 262         man[i+=1]="$arg"
 263       done
 264       command man "${man[@]}"
 265     }
 266     ;;
 267 esac
 268
 269 ###--------------------------------------------------------------------------
 270 ### Path hacks.
 271
 272 ## path-add [VAR] DIR
 273 ##
 274 ## Add DIR to the beginning of PATH-like variable VAR (defaults to PATH) if
 275 ## it's not there already.
 276 path-add () {
 277   local pathvar export dir val
 278   case $# in
 279     1) pathvar=PATH dir=$1 export="export PATH";;
 280     2) pathvar=$1 dir=$2 export=:;;
 281     *) echo >&2 "Usage: $0 [VAR] DIR";;
 282   esac
 283   eval "val=\$$pathvar"
 284   case ":$val:" in
 285     *:"$dir":*) ;;
 286     *) val=$dir:$val ;;
 287   esac
 288   eval "$pathvar=\$val"
 289   $export
 290 }
 291
 292 ## path-remove [VAR] DIR
 293 ##
 294 ## Remove DIR from PATH-like variable VAR (defaults to PATH); it's not an
 295 ## error if DIR isn't in VAR.
 296 path-remove () {
 297   local pathvar export dir val
 298   case $# in
 299     1) pathvar=PATH dir=$1 export="export PATH";;
 300     2) pathvar=$1 dir=$2 export=:;;
 301     *) echo >&2 "Usage: $0 [VAR] DIR";;
 302   esac
 303   eval "val=\$$pathvar"
 304   case ":$val:" in
 305     :"$dir":) val= ;;
 306     :"$dir":*) val=${val#$dir:} ;;
 307     *:"$dir":) val=${val%:$dir} ;;
 308     *:"$dir":*) val=${val/:$dir:/:} ;;
 309   esac
 310   eval "$pathvar=\$val"
 311   $export
 312 }
 313
 314 ## pathhack [-f] +HACK|-HACK...
 315 ##
 316 ## Each HACK refers to a subdirectory of `~/bin/hacks'.  A hack name preceded
 317 ## by `+' adds the directory to the PATH; a `-' removes.  Adding a hack
 318 ## that's already on the PATH doesn't do anything unless `-f' is set, in
 319 ## which case it gets moved to the beginning.  With no arguments, print the
 320 ## currently installed hacks.
 321 pathhack () {
 322   if [ $# -eq 0 ]; then
 323     local IFS=:
 324     for e in $PATH; do
 325       case "$e" in
 326         "$HOME/bin/hacks/"*)
 327           echo ${e#$HOME/bin/hacks/}
 328           ;;
 329       esac
 330     done
 331     return
 332   fi
 333   local force=nil
 334   local path=$PATH
 335   while [ $# -gt 0 ]; do
 336     arg=$1
 337     case "$arg" in
 338       -f | --force)
 339         force=t
 340         shift
 341         continue
 342         ;;
 343       --)
 344         shift
 345         break
 346         ;;
 347       [-+]*)
 348         ;;
 349       *)
 350         break
 351         ;;
 352     esac
 353     hack=${arg#[+-]}
 354     dir=$HOME/bin/hacks/$hack
 355     [ -d "$dir" ] || {
 356       echo "$0: path hack $hack not found"
 357       return 1
 358     }
 359     case "$arg,$force,:$PATH:" in
 360       -*,*,*:"$dir":*)
 361         path-remove path "$dir"
 362         ;;
 363       +*,t,*:"$dir":*)
 364         path-remove path "$dir"
 365         path-add path "$dir"
 366         ;;
 367       +*,nil,*:"$dir":*)
 368         ;;
 369       +*,*)
 370         path-add path "$dir"
 371         ;;
 372     esac
 373     shift
 374   done
 375   if [ $# -eq 0 ]; then
 376     PATH=$path
 377     export PATH
 378   else
 379     PATH=$path "$@"
 380   fi
 381 }
 382
 383 ###--------------------------------------------------------------------------
 384 ### Finishing touches.
 385
 386 ## For `root' use -- some simple molly-guards.
 387 if (( UID == 0 )); then
 388   alias rm='rm -i' cp='cp -i' mv='mv -i'
 389   set -o noclobber
 390 fi
 391
 392 ## Run any local hooks.
 393 [ -f "$HOME/.bashrc-local" ] && . "$HOME/.bashrc-local"
 394
 395 ## Close the `__mdw_bashrc' guard.
 396 fi
 397
 398 ###----- That's all, folks --------------------------------------------------
 399
 400 :