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

   1 ### -*-sh-*-
   2 ###
   3 ### Common per-shell configuration.
   4
   5 ###--------------------------------------------------------------------------
   6 ### Utilities.
   7
   8 __mdw_programp () { type >/dev/null 2>&1 "$1"; }
   9
  10 __mdw_source_if_exists () {
  11   local i
  12   for i in "$@"; do
  13     if [ -r "$i" ]; then . "$i"; fi
  14   done
  15 }
  16
  17 ###--------------------------------------------------------------------------
  18 ### Hooks.
  19
  20 __mdw_addhook () {
  21   local hk=$1 fn=$2 t
  22
  23   eval t=\${$hk+t}
  24   case $t in t) ;; *) echo >&2 "unknown hook \`$hk'"; return 2; esac
  25
  26   eval t=\$$hk
  27   case " $t " in
  28     *" $fn "*) ;;
  29     *) eval "$hk=\${$hk:+\$$hk }\$fn" ;;
  30   esac
  31 }
  32
  33 __mdw_delhook () {
  34   local hk=$1 fn=$2 t l r
  35
  36   eval t=\${$hk+t}
  37   case $t in t) ;; *) echo >&2 "unknown hook \`$hk'"; return 2; esac
  38
  39   eval t=\" \$$hk \"
  40   case $t in
  41     *" $fn "*)
  42       l=${t%% $fn*} r=${t##*$fn }
  43       l=${l# } r=${r% }
  44       eval "$hk=\$l\${l:+ }\$r"
  45       ;;
  46   esac
  47 }
  48
  49 __mdw_setrc () { return $1; }
  50
  51 __mdw_runhook () {
  52   local hk=$1 saverc=$? t i; shift
  53
  54   eval t=\${$hk+t}
  55   case $t in t) ;; *) echo >&2 "unknown hook \`$hk'"; return 2; esac
  56
  57   eval t=\$$hk
  58   for i in $t; do __mdw_setrc $saverc; "$i" "$@"; done
  59 }
  60
  61 ###--------------------------------------------------------------------------
  62 ### Prompt machinery.
  63
  64 __mdw_host=$(hostname)
  65 __mdw_hqual=
  66 __mdw_hqual=$__mdw_hqual${SCHROOT_CHROOT_NAME+/$SCHROOT_CHROOT_NAME}
  67 __mdw_hqual=$__mdw_hqual${CROSS_BUILDENV+/$CROSS_BUILDENV}
  68 __mdw_set_prompt_hacks () { host=$__mdw_host; dir=""; }
  69
  70 __mdw_system=$(uname -s)
  71 : ${USER-${LOGNAME-$(id -un)}}
  72 __mdw_user=$USER
  73
  74 case $(id -u) in
  75   0)
  76     __mdw_rootp=t
  77     ;;
  78   *)
  79     case $__mdw_system in
  80       CYGWIN_*)
  81         case " $(id -G) " in
  82           *" 544 "*) __mdw_rootp=t __mdw_user="$__mdw_user%admin" ;;
  83           *) __mdw_rootp=nil ;;
  84         esac
  85         ;;
  86       *)
  87         __mdw_rootp=nil
  88         ;;
  89     esac
  90 esac
  91
  92 __mdw_set_prompt_pieces () {
  93
  94   ## Fancy highlighting in some terminals.
  95   local bold unbold nl gitcolour rccolour uncolour
  96   local host dir more
  97   bold="" unbold="" nl="" gitcolour="" rccolour="" uncolour="" more=""
  98   __mdw_set_prompt_hacks
  99
 100   ## Choose the right delimiters.  Highlight root prompts specially;
 101   ## highlight when I'm running as some other user.  Highlight when this
 102   ## isn't the outermost shell on the terminal.
 103   local left right u tty
 104   case $__mdw_rootp in
 105     t)
 106       left=$(echo « | iconv -f UTF-8 -t //translit)
 107       right=$(echo » | iconv -f UTF-8 -t //translit)
 108       ;;
 109     nil)
 110       case $USER in
 111         mdw | mwooding | nemo) u="" left="[" right="]" ;;
 112         *) u="$__mdw_user@" left="{" right="}" ;;
 113       esac
 114       tty=$(tty)
 115       case "$__mdw_tty" in
 116         "$tty") left="<" right=">" ;;
 117         *) __mdw_tty=$tty; export __mdw_tty ;;
 118       esac
 119       ;;
 120   esac
 121
 122   ## If this session is insecure then highlight that.
 123   local sec_l sec_r h
 124   h=$(hostname)
 125   case ${SSH_CLIENT-nil},${SCHROOT_CHROOT_NAME-nil},$__mdw_sechost in
 126     nil,nil,"$h") sec_l="" sec_r="" ;;
 127     nil,nil,*) sec_l="(" sec_r=")" ;;
 128     *) sec_l="" sec_r=""
 129   esac
 130
 131   ## If this is an schroot environment or some other interesting augmented
 132   ## environment then point this out.
 133
 134   ## Put together the main pieces.
 135   __mdw_prompt_left="$nl$bold$left$sec_l$u$host$__mdw_hqual$sec_r$dir"
 136   __mdw_prompt_git_left="$unbold$gitcolour"
 137   __mdw_prompt_git_right="$uncolour$bold"
 138   __mdw_prompt_rc_left="$unbold$rccolour"
 139   __mdw_prompt_rc_right="$uncolour$bold"
 140   __mdw_prompt_right="$right$unbold"
 141   __mdw_prompt_more=" $more$bold>$unbold "
 142 }
 143
 144 __mdw_set_prompt () {
 145   case "${TERM-dumb}:${INSIDE_EMACS+$INSIDE_EMACS}" in
 146     dumb:)
 147       case $(id -u) in 0) PS1='# ' ;; *) PS1='$ ' ;; esac
 148       PS2='> '
 149       ;;
 150     *)
 151       __mdw_last_rc=$?
 152       local git rc
 153       if type __git_ps1 >/dev/null 2>&1; then
 154         git="$__mdw_prompt_git_left$(__git_ps1)$__mdw_prompt_git_right"
 155       else
 156         git=""
 157       fi
 158       case $__mdw_last_rc in
 159         0) rc="" ;;
 160         *) rc="$__mdw_prompt_rc_left rc=$__mdw_last_rc$__mdw_prompt_rc_right" ;;
 161       esac
 162       PS1="$__mdw_prompt_left$git$rc$__mdw_prompt_right"
 163       PS2="$PS1$__mdw_prompt_more"
 164       unset __mdw_last_rc
 165       ;;
 166   esac
 167 }
 168
 169 __mdw_xterm_settitle () {
 170   printf >/dev/tty \
 171     "\e]2;%s@%s:%s – %s\e\\" \
 172     "$__mdw_user" "$__mdw_host$__mdw_hqual" "$PWD" \
 173     "$1"
 174 }
 175 __mdw_xterm_precmd () { __mdw_xterm_settitle "$__mdw_shell"; }
 176 __mdw_xterm_preexec () { __mdw_xterm_settitle "$1"; }
 177
 178 __mdw_screen_settitle () {
 179   printf >/dev/tty \
 180     "\ek%s\e\\" \
 181     "$1"
 182 }
 183 __mdw_screen_precmd () { __mdw_screen_settitle "$__mdw_shell"; }
 184 __mdw_screen_preexec () { __mdw_screen_settitle "$1"; }
 185
 186 if [ -t 0 ]; then
 187   case ${STY+t},${__mdw_precmd_hook+t},${__mdw_preexec_hook+t},${TERM} in
 188     ,t,t,xterm*)
 189       __mdw_addhook __mdw_precmd_hook __mdw_xterm_precmd
 190       __mdw_addhook __mdw_preexec_hook __mdw_xterm_preexec
 191       ;;
 192     t,t,t,*)
 193       __mdw_addhook __mdw_precmd_hook __mdw_screen_precmd
 194       __mdw_addhook __mdw_preexec_hook __mdw_screen_preexec
 195       ;;
 196   esac
 197   case ${__mdw_precmd_hook+t} in
 198     t) __mdw_addhook __mdw_precmd_hook __mdw_set_prompt ;;
 199   esac
 200 fi
 201
 202 ###--------------------------------------------------------------------------
 203 ### Some handy aliases.
 204
 205 alias cx='chmod +x'
 206 alias which="command -v"
 207 alias rc="rc -l"
 208 rootly () {
 209   case $# in 0) set -- "${SHELL-/bin/sh}" ;; esac
 210   $__MDW_ROOTLY "$@"
 211 }
 212 alias r=rootly
 213 alias re="rootly $EDITOR"
 214 alias pstree="pstree -hl"
 215 alias cdtmp='cd ${TMPDIR-/tmp}'
 216 alias pushtmp='pushd ${TMPDIR-/tmp}'
 217 alias e="$EDITOR"
 218 alias svn="svnwrap svn"
 219 alias @="ssh"
 220 alias make="nice make"
 221 alias cross-run="nice cross-run"
 222 alias gdb="gdb -q"
 223
 224 ## Shut up Lisp interpreters.
 225 alias clisp="clisp -q -q"
 226 alias cmucl="rlwrap cmucl -quiet"
 227 alias ecl="rlwrap ecl"
 228 alias sbcl="rlwrap sbcl --noinform"
 229
 230 ###--------------------------------------------------------------------------
 231 ### Colour output.
 232
 233 ## Arrange for `ls' output to be in colour.
 234 if __mdw_programp dircolors; then eval $(dircolors -b "$HOME/.dircolors")
 235 else unset LS_COLORS; fi
 236
 237 unalias ls 2>/dev/null || :
 238 ls () {
 239   if [ -t 1 ]; then command ls $LS_OPTIONS ${LS_COLORS+--color=auto} "$@"
 240   else command ls "$@"; fi
 241 }
 242
 243 ## Arrange for `grep' output to be in colour.
 244 export GREP_COLORS="mt=01;31:ms=01;31:mc=031;31:fn=36:ln=36:bn=36:se=34"
 245
 246 greplike () {
 247   local grep=$1; shift
 248   if [ -t 1 ]; then
 249     command $grep ${GREP_COLORS+--color=always} "$@" | mdw-pager
 250   else
 251     command $grep "$@"
 252   fi
 253 }
 254 alias grep="greplike grep"
 255 alias egrep="greplike egrep"
 256 alias fgrep="greplike fgrep"
 257 alias zgrep="greplike zgrep"
 258
 259 ## Arrange for `diff' output to be in colour.
 260 export DIFF_COLORS="hd=1:ln=36:ad=32:de=31"
 261 difflike () {
 262   local diff=$1; shift
 263   if [ -t 1 ]; then
 264     command $diff \
 265             ${DIFF_COLORS+--color=always} \
 266             ${DIFF_COLORS+--palette="$DIFF_COLORS"} \
 267             "$@" | mdw-pager
 268   else
 269     command $diff "$@" | cat
 270   fi
 271 }
 272 alias diff="difflike diff"
 273
 274 ###--------------------------------------------------------------------------
 275 ### Other hacks.
 276
 277 ## Turn off pagers inside Emacs shell buffers.
 278 case "$INSIDE_EMACS" in
 279   2[2-9].*,comint | [3-9][0-9].*,comint) export PAGER=cat ;;
 280 esac
 281
 282 ###--------------------------------------------------------------------------
 283 ### More complicated shell functions.
 284
 285 ## xt [@HOST] XTERM-ARGS
 286 ##
 287 ## Open a terminal, maybe on a remote host.
 288 xt () {
 289   case "$1" in
 290     @*)
 291       local remote=${1#@} title
 292       shift
 293       if [ $# -gt 0 ]; then
 294         title="xterm [$remote] $1"
 295       else
 296         title="xterm [$remote]"
 297       fi
 298       (xterm -title "$title" -e ssh $remote "$@" &)
 299       ;;
 300     *)
 301       (xterm "$@" &)
 302       ;;
 303   esac
 304 }
 305
 306 ## core [y|n]
 307 ##
 308 ## Tweak core dumps on and off, or show the current status.
 309 core () {
 310   case "x$1" in
 311     xon|xy|xyes) ulimit -Sc $(ulimit -Hc) ;;
 312     xoff|xn|xno) ulimit -Sc 0 ;;
 313     x)
 314       local l=$(ulimit -Sc)
 315       case $l in
 316         0) echo "Core dumps disabled" ;;
 317         unlimited) echo "Core dumps enabled" ;;
 318         *) echo "Core dump limit is $l blocks" ;;
 319       esac
 320       ;;
 321     *)
 322       echo >&2 "usage: core [y|n]"
 323       return 1
 324       ;;
 325   esac
 326 }
 327
 328 ## world [NAME]
 329 ##
 330 ## Set current security world to NAME.  With no NAME, print the currently
 331 ## selected world.
 332 world () {
 333   local nfast=${NFAST_HOME-/opt/nfast}
 334   local kmdata
 335   case "$#" in
 336     0)
 337       echo "${NFAST_KMDATA#$nfast/kmdata-}"
 338       ;;
 339     *)
 340       if [ -d "$1" ]; then
 341         kmdata=$1
 342       elif [ -d "$nfast/kmdata-$1" ]; then
 343         kmdata=$nfast/kmdata-$1
 344       else
 345         echo >&2 "world: can't find world $1"
 346         return 1
 347       fi
 348       shift
 349       case "$#" in
 350         0) export NFAST_KMDATA=$kmdata ;;
 351         *) "$@" ;;
 352       esac
 353       ;;
 354   esac
 355 }
 356
 357 ## path-add [VAR] DIR
 358 ##
 359 ## Add DIR to the beginning of PATH-like variable VAR (defaults to PATH) if
 360 ## it's not there already.
 361 path_add () {
 362   local pathvar export dir val
 363   case $# in
 364     1) pathvar=PATH dir=$1 export="export PATH" ;;
 365     2) pathvar=$1 dir=$2 export=: ;;
 366     *) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
 367   esac
 368   eval val=\$$pathvar
 369   case ":$val:" in
 370     *:"$dir":*) ;;
 371     *) val=$dir:$val ;;
 372   esac
 373   eval $pathvar=\$val
 374   eval $export
 375 }
 376
 377 ## path-remove [VAR] DIR
 378 ##
 379 ## Remove DIR from PATH-like variable VAR (defaults to PATH); it's not an
 380 ## error if DIR isn't in VAR.
 381 path_remove () {
 382   local pathvar export dir val
 383   case $# in
 384     1) pathvar=PATH dir=$1 export="export PATH" ;;
 385     2) pathvar=$1 dir=$2 export=: ;;
 386     *) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
 387   esac
 388   eval val=\$$pathvar
 389   case ":$val:" in
 390     :"$dir":) val= ;;
 391     :"$dir":*) val=${val#$dir:} ;;
 392     *:"$dir":) val=${val%:$dir} ;;
 393     *:"$dir":*) val=${val%%:$dir:*}:${val#*:$dir:} ;;
 394   esac
 395   eval $pathvar=\$val
 396   eval $export
 397 }
 398
 399 ## pathhack [-f] +HACK|-HACK...
 400 ##
 401 ## Each HACK refers to a subdirectory of `~/bin/hacks'.  A hack name preceded
 402 ## by `+' adds the directory to the PATH; a `-' removes.  Adding a hack
 403 ## that's already on the PATH doesn't do anything unless `-f' is set, in
 404 ## which case it gets moved to the beginning.  With no arguments, print the
 405 ## currently installed hacks.
 406 pathhack () {
 407   local p e force arg hack dir
 408   p=$PATH
 409   if [ $# -eq 0 ]; then
 410     while :; do
 411       e=${p%%:*}
 412       case "$e" in "$HOME/bin/hacks/"*) echo ${e#$HOME/bin/hacks/} ;; esac
 413       case "$p" in *:*) p=${p#*:} ;; *) break ;; esac
 414     done
 415     return
 416   fi
 417   force=nil
 418   while [ $# -gt 0 ]; do
 419     arg=$1
 420     case "$arg" in
 421       -f | --force) force=t; shift; continue ;;
 422       --) shift; break ;;
 423       [-+]*) ;;
 424       *) break; ;;
 425     esac
 426     hack=${arg#[+-]}
 427     dir=$HOME/bin/hacks/$hack
 428     if ! [ -d "$dir" ]; then
 429       echo "$0: path hack $hack not found"
 430       return 1
 431     fi
 432     case "$arg,$force,:$PATH:" in
 433       -*,*,*:"$dir":*) path_remove p "$dir" ;;
 434       +*,t,*:"$dir":*) path_remove p "$dir"; path_add p "$dir" ;;
 435       +*,nil,*:"$dir":*) ;;
 436       +*,*) path_add p "$dir" ;;
 437     esac
 438     shift
 439   done
 440   if [ $# -eq 0 ]; then PATH=$p; export PATH
 441   else PATH=$p "$@"; fi
 442 }
 443
 444 ###--------------------------------------------------------------------------
 445 ### Finishing touches.
 446
 447 ## Make sure `$HOME/bin' is on the path.
 448 path_add "$HOME/bin"
 449
 450 ## Set the temporary directory again.  (A setuid or setgid program may have
 451 ## unhelpfully forgotten this for us.)
 452 case ${TMPDIR+t} in
 453   t) ;;
 454   *) if __mdw_programp tmpdir; then eval $(tmpdir -b); fi ;;
 455 esac
 456
 457 ## For `root' use -- some simple molly-guards.
 458 case $(id -u) in
 459   0)
 460     alias rm="rm -i" cp="cp -i" mv="mv -i"
 461     set -o noclobber
 462     ;;
 463 esac
 464
 465 ## Run any local hooks.
 466 __mdw_source_if_exists "$HOME/.shell-local"
 467
 468 ###----- That's all, folks --------------------------------------------------