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 more host dir
  96   local gitcolour rccolour uncolour
  97   bold="" unbold="" nl="" more=""
  98   gitcolour="" rccolour="" uncolour=""
  99   __mdw_set_prompt_hacks
 100
 101   ## Choose the right delimiters.  Highlight root prompts specially;
 102   ## highlight when I'm running as some other user.  Highlight when this
 103   ## isn't the outermost shell on the terminal.
 104   local left right u tty
 105   case $__mdw_rootp in
 106     t)
 107       left=$(echo « | iconv -f UTF-8 -t //translit)
 108       right=$(echo » | iconv -f UTF-8 -t //translit)
 109       ;;
 110     nil)
 111       case $USER in
 112         mdw | mwooding | nemo) u="" left="[" right="]" ;;
 113         *) u="$__mdw_user@" left="{" right="}" ;;
 114       esac
 115       tty=$(tty)
 116       case "$__mdw_tty" in
 117         "$tty") left="<" right=">" ;;
 118         *) __mdw_tty=$tty; export __mdw_tty ;;
 119       esac
 120       ;;
 121   esac
 122
 123   ## If this session is insecure then highlight that.
 124   local sec_l sec_r h
 125   h=$(hostname)
 126   case ${SSH_CLIENT-nil},${SCHROOT_CHROOT_NAME-nil},$__mdw_sechost in
 127     nil,nil,"$h") sec_l="" sec_r="" ;;
 128     nil,nil,*) sec_l="(" sec_r=")" ;;
 129     *) sec_l="" sec_r=""
 130   esac
 131
 132   ## If this is an schroot environment or some other interesting augmented
 133   ## environment then point this out.
 134
 135   ## Put together the main pieces.
 136   __mdw_prompt_left="$nl$bold$left$sec_l$u$host$__mdw_hqual$sec_r$dir"
 137   __mdw_prompt_git_left="$unbold$gitcolour"
 138   __mdw_prompt_git_right="$uncolour$bold"
 139   __mdw_prompt_rc_left="$unbold$rccolour"
 140   __mdw_prompt_rc_right="$uncolour$bold"
 141   __mdw_prompt_right="$right$unbold"
 142   __mdw_prompt_more=" $more$bold>$unbold "
 143 }
 144
 145 __mdw_set_prompt () {
 146   case "${TERM-dumb}:${INSIDE_EMACS+$INSIDE_EMACS}" in
 147     dumb:)
 148       case $(id -u) in 0) PS1='# ' ;; *) PS1='$ ' ;; esac
 149       PS2='> '
 150       ;;
 151     *)
 152       __mdw_last_rc=$?
 153       local git rc
 154       if type __git_ps1 >/dev/null 2>&1; then
 155         git="$__mdw_prompt_git_left$(__git_ps1)$__mdw_prompt_git_right"
 156       else
 157         git=""
 158       fi
 159       case $__mdw_last_rc in
 160         0) rc="" ;;
 161         *) rc="$__mdw_prompt_rc_left rc=$__mdw_last_rc$__mdw_prompt_rc_right" ;;
 162       esac
 163       PS1="$__mdw_prompt_left$git$rc$__mdw_prompt_right"
 164       PS2="$PS1$__mdw_prompt_more"
 165       unset __mdw_last_rc
 166       ;;
 167   esac
 168 }
 169
 170 __mdw_xterm_settitle () {
 171   printf >/dev/tty \
 172     "\e]2;%s@%s:%s – %s\e\\" \
 173     "$__mdw_user" "$__mdw_host$__mdw_hqual" "$PWD" \
 174     "$1"
 175 }
 176 __mdw_xterm_precmd () { __mdw_xterm_settitle "$__mdw_shell"; }
 177 __mdw_xterm_preexec () { __mdw_xterm_settitle "$1"; }
 178
 179 __mdw_screen_settitle () {
 180   printf >/dev/tty \
 181     "\ek%s\e\\" \
 182     "$1"
 183 }
 184 __mdw_screen_precmd () { __mdw_screen_settitle "$__mdw_shell"; }
 185 __mdw_screen_preexec () { __mdw_screen_settitle "$1"; }
 186
 187 if [ -t 0 ]; then
 188   case ${STY+t},${__mdw_precmd_hook+t},${__mdw_preexec_hook+t},${TERM} in
 189     ,t,t,xterm*)
 190       __mdw_addhook __mdw_precmd_hook __mdw_xterm_precmd
 191       __mdw_addhook __mdw_preexec_hook __mdw_xterm_preexec
 192       ;;
 193     t,t,t,*)
 194       __mdw_addhook __mdw_precmd_hook __mdw_screen_precmd
 195       __mdw_addhook __mdw_preexec_hook __mdw_screen_preexec
 196       ;;
 197   esac
 198   case ${__mdw_precmd_hook+t} in
 199     t) __mdw_addhook __mdw_precmd_hook __mdw_set_prompt ;;
 200   esac
 201 fi
 202
 203 ###--------------------------------------------------------------------------
 204 ### Some handy aliases.
 205
 206 alias cx='chmod +x'
 207 alias which="command -v"
 208 alias rc="rc -l"
 209 rootly () {
 210   case $# in 0) set -- "${SHELL-/bin/sh}" ;; esac
 211   $__MDW_ROOTLY "$@"
 212 }
 213 alias r=rootly
 214 alias re="rootly $EDITOR"
 215 alias pstree="pstree -hl"
 216 alias cdtmp='cd ${TMPDIR-/tmp}'
 217 alias pushtmp='pushd ${TMPDIR-/tmp}'
 218 alias e="$EDITOR"
 219 alias svn="svnwrap svn"
 220 alias @="ssh"
 221 alias make="nice make"
 222 alias cross-run="nice cross-run"
 223 alias gdb="gdb -q"
 224
 225 ## Shut up Lisp interpreters.
 226 alias clisp="clisp -q -q"
 227 alias cmucl="rlwrap cmucl -quiet"
 228 alias ecl="rlwrap ecl"
 229 alias sbcl="rlwrap sbcl --noinform"
 230 alias ccl="rlwrap ccl"
 231 alias ccl32="rlwrap ccl32"
 232 alias ccl64="rlwrap ccl64"
 233 alias abcl="rlwrap abcl --noinform"
 234
 235 ###--------------------------------------------------------------------------
 236 ### Colour output.
 237
 238 ## Arrange for `ls' output to be in colour.
 239 if __mdw_programp dircolors; then eval $(dircolors -b "$HOME/.dircolors")
 240 else unset LS_COLORS; fi
 241
 242 unalias ls 2>/dev/null || :
 243 ls () {
 244   if [ -t 1 ]; then command ls $LS_OPTIONS ${LS_COLORS+--color=auto} "$@"
 245   else command ls "$@"; fi
 246 }
 247
 248 ## Arrange for `grep' output to be in colour.
 249 export GREP_COLORS="mt=01;31:ms=01;31:mc=031;31:fn=36:ln=36:bn=36:se=34"
 250
 251 greplike () {
 252   local grep=$1; shift
 253   if [ -t 1 ]; then
 254     command $grep ${GREP_COLORS+--color=always} "$@" | mdw-pager
 255   else
 256     command $grep "$@"
 257   fi
 258 }
 259 alias grep="greplike grep"
 260 alias egrep="greplike egrep"
 261 alias fgrep="greplike fgrep"
 262 alias zgrep="greplike zgrep"
 263
 264 ## Arrange for `diff' output to be in colour.
 265 export DIFF_COLORS="hd=1:ln=36:ad=32:de=31"
 266 difflike () {
 267   local diff=$1; shift
 268   if [ -t 1 ]; then
 269     command $diff \
 270             ${DIFF_COLORS+--color=always} \
 271             ${DIFF_COLORS+--palette="$DIFF_COLORS"} \
 272             "$@" | mdw-pager
 273   else
 274     command $diff "$@" | cat
 275   fi
 276 }
 277 alias diff="difflike diff"
 278
 279 ###--------------------------------------------------------------------------
 280 ### Other hacks.
 281
 282 ## Turn off pagers inside Emacs shell buffers.
 283 case "$INSIDE_EMACS" in
 284   2[2-9].*,comint | [3-9][0-9].*,comint) export PAGER=cat ;;
 285 esac
 286
 287 ###--------------------------------------------------------------------------
 288 ### More complicated shell functions.
 289
 290 ## xt [@HOST] XTERM-ARGS
 291 ##
 292 ## Open a terminal, maybe on a remote host.
 293 xt () {
 294   case "$1" in
 295     @*)
 296       local remote=${1#@} title
 297       shift
 298       if [ $# -gt 0 ]; then
 299         title="xterm [$remote] $1"
 300       else
 301         title="xterm [$remote]"
 302       fi
 303       (xterm -title "$title" -e ssh $remote "$@" &)
 304       ;;
 305     *)
 306       (xterm "$@" &)
 307       ;;
 308   esac
 309 }
 310
 311 ## core [y|n]
 312 ##
 313 ## Tweak core dumps on and off, or show the current status.
 314 core () {
 315   case "x$1" in
 316     xon|xy|xyes) ulimit -Sc $(ulimit -Hc) ;;
 317     xoff|xn|xno) ulimit -Sc 0 ;;
 318     x)
 319       local l=$(ulimit -Sc)
 320       case $l in
 321         0) echo "Core dumps disabled" ;;
 322         unlimited) echo "Core dumps enabled" ;;
 323         *) echo "Core dump limit is $l blocks" ;;
 324       esac
 325       ;;
 326     *)
 327       echo >&2 "usage: core [y|n]"
 328       return 1
 329       ;;
 330   esac
 331 }
 332
 333 ## world [NAME]
 334 ##
 335 ## Set current security world to NAME.  With no NAME, print the currently
 336 ## selected world.
 337 world () {
 338   local nfast=${NFAST_HOME-/opt/nfast}
 339   local kmdata
 340   case "$#" in
 341     0)
 342       echo "${NFAST_KMDATA#$nfast/kmdata-}"
 343       ;;
 344     *)
 345       if [ -d "$1" ]; then
 346         kmdata=$1
 347       elif [ -d "$nfast/kmdata-$1" ]; then
 348         kmdata=$nfast/kmdata-$1
 349       else
 350         echo >&2 "world: can't find world $1"
 351         return 1
 352       fi
 353       shift
 354       case "$#" in
 355         0) export NFAST_KMDATA=$kmdata ;;
 356         *) "$@" ;;
 357       esac
 358       ;;
 359   esac
 360 }
 361
 362 ## path-add [VAR] DIR
 363 ##
 364 ## Add DIR to the beginning of PATH-like variable VAR (defaults to PATH) if
 365 ## it's not there already.
 366 path_add () {
 367   local pathvar export dir val
 368   case $# in
 369     1) pathvar=PATH dir=$1 export="export PATH" ;;
 370     2) pathvar=$1 dir=$2 export=: ;;
 371     *) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
 372   esac
 373   eval val=\$$pathvar
 374   case ":$val:" in
 375     *:"$dir":*) ;;
 376     *) val=$dir:$val ;;
 377   esac
 378   eval $pathvar=\$val
 379   eval $export
 380 }
 381
 382 ## path-remove [VAR] DIR
 383 ##
 384 ## Remove DIR from PATH-like variable VAR (defaults to PATH); it's not an
 385 ## error if DIR isn't in VAR.
 386 path_remove () {
 387   local pathvar export dir val
 388   case $# in
 389     1) pathvar=PATH dir=$1 export="export PATH" ;;
 390     2) pathvar=$1 dir=$2 export=: ;;
 391     *) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
 392   esac
 393   eval val=\$$pathvar
 394   case ":$val:" in
 395     :"$dir":) val= ;;
 396     :"$dir":*) val=${val#$dir:} ;;
 397     *:"$dir":) val=${val%:$dir} ;;
 398     *:"$dir":*) val=${val%%:$dir:*}:${val#*:$dir:} ;;
 399   esac
 400   eval $pathvar=\$val
 401   eval $export
 402 }
 403
 404 ## pathhack [-f] +HACK|-HACK...
 405 ##
 406 ## Each HACK refers to a subdirectory of `~/bin/hacks'.  A hack name preceded
 407 ## by `+' adds the directory to the PATH; a `-' removes.  Adding a hack
 408 ## that's already on the PATH doesn't do anything unless `-f' is set, in
 409 ## which case it gets moved to the beginning.  With no arguments, print the
 410 ## currently installed hacks.
 411 pathhack () {
 412   local p e force arg hack dir
 413   p=$PATH
 414   if [ $# -eq 0 ]; then
 415     while :; do
 416       e=${p%%:*}
 417       case "$e" in "$HOME/bin/hacks/"*) echo ${e#$HOME/bin/hacks/} ;; esac
 418       case "$p" in *:*) p=${p#*:} ;; *) break ;; esac
 419     done
 420     return
 421   fi
 422   force=nil
 423   while [ $# -gt 0 ]; do
 424     arg=$1
 425     case "$arg" in
 426       -f | --force) force=t; shift; continue ;;
 427       --) shift; break ;;
 428       [-+]*) ;;
 429       *) break; ;;
 430     esac
 431     hack=${arg#[+-]}
 432     dir=$HOME/bin/hacks/$hack
 433     if ! [ -d "$dir" ]; then
 434       echo "$0: path hack $hack not found"
 435       return 1
 436     fi
 437     case "$arg,$force,:$PATH:" in
 438       -*,*,*:"$dir":*) path_remove p "$dir" ;;
 439       +*,t,*:"$dir":*) path_remove p "$dir"; path_add p "$dir" ;;
 440       +*,nil,*:"$dir":*) ;;
 441       +*,*) path_add p "$dir" ;;
 442     esac
 443     shift
 444   done
 445   if [ $# -eq 0 ]; then PATH=$p; export PATH
 446   else PATH=$p "$@"; fi
 447 }
 448
 449 ###--------------------------------------------------------------------------
 450 ### Finishing touches.
 451
 452 ## Make sure `$HOME/bin' is on the path.
 453 path_add "$HOME/bin"
 454
 455 ## Set the temporary directory again.  (A setuid or setgid program may have
 456 ## unhelpfully forgotten this for us.)
 457 case ${TMPDIR+t} in
 458   t) ;;
 459   *) if __mdw_programp tmpdir; then eval $(tmpdir -b); fi ;;
 460 esac
 461
 462 ## For `root' use -- some simple molly-guards.
 463 case $(id -u) in
 464   0)
 465     alias rm="rm -i" cp="cp -i" mv="mv -i"
 466     set -o noclobber
 467     ;;
 468 esac
 469
 470 ## Run any local hooks.
 471 __mdw_source_if_exists "$HOME/.shell-local"
 472
 473 ###----- That's all, folks --------------------------------------------------