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   git="" rc=""
  78   if [[ ${BASH_VERSINFO[0]} -ge 4 ]]; then
  79     if type __git_ps1 >/dev/null 2>&1; then
  80       git="$unbold$gitcolour\$(rc=\$?;__git_ps1;exit \$rc)$uncolour$bold"
  81     fi
  82     rc="$unbold$rccolour\$(rc=\$?;case \$rc in 0);;"
  83     rc="$rc*)echo -n \" rc=\$rc\";;esac;exit \$rc)$uncolour$bold"
  84   fi
  85   PS1="$nl$bold$left$sec_l$u\\h$hqual$sec_r \\w$git$rc$marker$right$unbold"
  86   PS2="$PS1 $bold>$unbold "
  87   unset nl bold unbold left right sec_l sec_r marker
  88   unset gitcolour rccolour uncolour git rc hqual
  89 fi
  90
  91 ###--------------------------------------------------------------------------
  92 ### Other shell tweaking.
  93
  94 ## Random shell tweaks.
  95 notify=1
  96 set -b
  97 shopt -u cdable_vars
  98 shopt -s cdspell
  99 shopt -s checkhash
 100 shopt -s checkwinsize
 101 shopt -s cmdhist
 102 shopt -u dotglob
 103 shopt -s expand_aliases
 104 shopt -s extglob
 105 if (( ${BASH_VERSINFO[0]} >= 4 )); then shopt -s globstar; fi
 106 shopt -s gnu_errfmt
 107 shopt -s histappend
 108 shopt -s histreedit
 109 shopt -u histverify
 110 shopt -s hostcomplete
 111 shopt -s huponexit
 112 shopt -s interactive_comments
 113 shopt -s lithist
 114 shopt -u mailwarn
 115 shopt -u nocaseglob
 116 shopt -u nullglob
 117 shopt -s promptvars
 118 shopt -u shift_verbose
 119 shopt -s sourcepath
 120 HISTCONTROL=ignorespace:erasedups
 121
 122 ## Some handy aliases.
 123 alias cx='chmod a+x'
 124 alias which="command -v"
 125 alias rc="rc -l"
 126 alias ssync="rsync -e ssh"
 127 rootly () {
 128   case $# in 0) set -- "${SHELL-/bin/sh}" ;; esac
 129   $__MDW_ROOTLY "$@"
 130 }
 131 alias r=rootly
 132 alias re="rootly $EDITOR"
 133 alias pstree="pstree -hl"
 134 alias cdtmp='cd ${TMPDIR-/tmp}'
 135 alias pushtmp='pushd ${TMPDIR-/tmp}'
 136 alias e="$EDITOR"
 137 alias svn="svnwrap svn"
 138 alias @="ssh"
 139
 140 ###--------------------------------------------------------------------------
 141 ### Colour output.
 142
 143 ## Arrange for `ls' output to be in colour.
 144 if [ -x /usr/bin/dircolors -o -x /usr/local/bin/dircolors ]; then
 145   eval `dircolors -b ~/.dircolors`
 146 else
 147   unset LS_COLORS
 148 fi
 149
 150 unalias ls 2>/dev/null || :; function ls () {
 151   if [ -t 1 ]; then
 152     command ls $LS_OPTIONS ${LS_COLORS+--color=auto} "$@"
 153   else
 154     command ls "$@"
 155   fi
 156 }
 157
 158 ## Arrange for `grep' output to be in colour.
 159 export GREP_COLORS="mt=01;31:ms=01;31:mc=031;31:fn=36:ln=36:bn=36:se=34"
 160
 161 greplike () {
 162   declare grep=$1; shift
 163   if [ -t 1 ]; then
 164     command $grep ${GREP_COLORS+--color=always} "$@" | mdw-pager
 165   else
 166     command $grep "$@"
 167   fi
 168 }
 169 alias grep="greplike grep"
 170 alias egrep="greplike egrep"
 171 alias fgrep="greplike fgrep"
 172 alias zgrep="greplike zgrep"
 173
 174 ## Turn off pagers inside Emacs shell buffers.
 175 case "$INSIDE_EMACS" in
 176   2[2-9].*,comint | [3-9][0-9].*,comint) export PAGER=cat ;;
 177 esac
 178
 179 ###--------------------------------------------------------------------------
 180 ### More complicated shell functions.
 181
 182 ## xt [@HOST] XTERM-ARGS
 183 ##
 184 ## Open a terminal, maybe on a remote host.
 185 xt () {
 186   case "$1" in
 187     @*)
 188       local remote=${1#@} title
 189       shift
 190       if [ $# -gt 0 ]; then
 191         title="xterm [$remote] $1"
 192       else
 193         title="xterm [$remote]"
 194       fi
 195       (xterm -title "$title" -e ssh $remote "$@" &)
 196       ;;
 197     *)
 198       (xterm "$@" &)
 199       ;;
 200   esac
 201 }
 202
 203 ## core [y|n]
 204 ##
 205 ## Tweak core dumps on and off, or show the current status.
 206 core () {
 207   case "x$1" in
 208     xon|xy|xyes) ulimit -Sc `ulimit -Hc` ;;
 209     xoff|xn|xno) ulimit -Sc 0 ;;
 210     x)
 211       local l=`ulimit -Sc`
 212       case $l in
 213         0) echo "Core dumps disabled" ;;
 214         unlimited) echo "Core dumps enabled" ;;
 215         *) echo "Core dump limit is $l blocks" ;;
 216       esac
 217       ;;
 218     *)
 219       echo >&2 "usage: core [y|n]"
 220       return 1
 221       ;;
 222   esac
 223 }
 224
 225 ## world [NAME]
 226 ##
 227 ## Set current security world to NAME.  With no NAME, print the currently
 228 ## selected world.
 229 world () {
 230   local nfast=${NFAST_HOME-/opt/nfast}
 231   local kmdata
 232   case "$#" in
 233     0)
 234       echo "${NFAST_KMDATA#$nfast/kmdata-}"
 235       ;;
 236     *)
 237       if [ -d "$1" ]; then
 238         kmdata=$1
 239       elif [ -d "$nfast/kmdata-$1" ]; then
 240         kmdata=$nfast/kmdata-$1
 241       else
 242         echo >&2 "world: can't find world $1"
 243         return 1
 244       fi
 245       shift
 246       case "$#" in
 247         0) export NFAST_KMDATA=$kmdata ;;
 248         *) "$@" ;;
 249       esac
 250       ;;
 251   esac
 252 }
 253
 254 ## Fix `man' under Slowaris.
 255 case "$MACHTYPE" in
 256   *solaris*)
 257     man () {
 258       declare -i i=0
 259       declare arg
 260       declare -a man
 261       for arg; do
 262         case "$arg" in [0-9]*) man[i+=1]="-s" ;; esac
 263         man[i+=1]="$arg"
 264       done
 265       command man "${man[@]}"
 266     }
 267     ;;
 268 esac
 269
 270 ###--------------------------------------------------------------------------
 271 ### Path hacks.
 272
 273 ## path-add [VAR] DIR
 274 ##
 275 ## Add DIR to the beginning of PATH-like variable VAR (defaults to PATH) if
 276 ## it's not there already.
 277 path-add () {
 278   local pathvar export dir val
 279   case $# in
 280     1) pathvar=PATH dir=$1 export="export PATH";;
 281     2) pathvar=$1 dir=$2 export=:;;
 282     *) echo >&2 "Usage: $0 [VAR] DIR";;
 283   esac
 284   eval "val=\$$pathvar"
 285   case ":$val:" in
 286     *:"$dir":*) ;;
 287     *) val=$dir:$val ;;
 288   esac
 289   eval "$pathvar=\$val"
 290   $export
 291 }
 292
 293 ## path-remove [VAR] DIR
 294 ##
 295 ## Remove DIR from PATH-like variable VAR (defaults to PATH); it's not an
 296 ## error if DIR isn't in VAR.
 297 path-remove () {
 298   local pathvar export dir val
 299   case $# in
 300     1) pathvar=PATH dir=$1 export="export PATH";;
 301     2) pathvar=$1 dir=$2 export=:;;
 302     *) echo >&2 "Usage: $0 [VAR] DIR";;
 303   esac
 304   eval "val=\$$pathvar"
 305   case ":$val:" in
 306     :"$dir":) val= ;;
 307     :"$dir":*) val=${val#$dir:} ;;
 308     *:"$dir":) val=${val%:$dir} ;;
 309     *:"$dir":*) val=${val/:$dir:/:} ;;
 310   esac
 311   eval "$pathvar=\$val"
 312   $export
 313 }
 314
 315 ## pathhack [-f] +HACK|-HACK...
 316 ##
 317 ## Each HACK refers to a subdirectory of `~/bin/hacks'.  A hack name preceded
 318 ## by `+' adds the directory to the PATH; a `-' removes.  Adding a hack
 319 ## that's already on the PATH doesn't do anything unless `-f' is set, in
 320 ## which case it gets moved to the beginning.  With no arguments, print the
 321 ## currently installed hacks.
 322 pathhack () {
 323   if [ $# -eq 0 ]; then
 324     local IFS=:
 325     for e in $PATH; do
 326       case "$e" in
 327         "$HOME/bin/hacks/"*)
 328           echo ${e#$HOME/bin/hacks/}
 329           ;;
 330       esac
 331     done
 332     return
 333   fi
 334   local force=nil
 335   local path=$PATH
 336   while [ $# -gt 0 ]; do
 337     arg=$1
 338     case "$arg" in
 339       -f | --force)
 340         force=t
 341         shift
 342         continue
 343         ;;
 344       --)
 345         shift
 346         break
 347         ;;
 348       [-+]*)
 349         ;;
 350       *)
 351         break
 352         ;;
 353     esac
 354     hack=${arg#[+-]}
 355     dir=$HOME/bin/hacks/$hack
 356     [ -d "$dir" ] || {
 357       echo "$0: path hack $hack not found"
 358       return 1
 359     }
 360     case "$arg,$force,:$PATH:" in
 361       -*,*,*:"$dir":*)
 362         path-remove path "$dir"
 363         ;;
 364       +*,t,*:"$dir":*)
 365         path-remove path "$dir"
 366         path-add path "$dir"
 367         ;;
 368       +*,nil,*:"$dir":*)
 369         ;;
 370       +*,*)
 371         path-add path "$dir"
 372         ;;
 373     esac
 374     shift
 375   done
 376   if [ $# -eq 0 ]; then
 377     PATH=$path
 378     export PATH
 379   else
 380     PATH=$path "$@"
 381   fi
 382 }
 383
 384 ###--------------------------------------------------------------------------
 385 ### Finishing touches.
 386
 387 ## For `root' use -- some simple molly-guards.
 388 if (( UID == 0 )); then
 389   alias rm='rm -i' cp='cp -i' mv='mv -i'
 390   set -o noclobber
 391 fi
 392
 393 ## Run any local hooks.
 394 [ -f "$HOME/.bashrc-local" ] && . "$HOME/.bashrc-local"
 395
 396 ## Close the `__mdw_bashrc' guard.
 397 fi
 398
 399 ###----- That's all, folks --------------------------------------------------
 400
 401 :