[profile] / dot / shell-rc

### -*-sh-*-
###
### Common per-shell configuration.

###--------------------------------------------------------------------------
### Utilities.

__mdw_programp () { type >/dev/null 2>&1 "$1"; }

__mdw_source_if_exists () {
  local i
  for i in "$@"; do
    if [ -r "$i" ]; then . "$i"; fi
  done
}

###--------------------------------------------------------------------------
### Prompt machinery.

__mdw_set_prompt_hacks () { host=$(hostname); dir=""; }

__mdw_set_prompt_pieces () {
  local hqual
  hqual=""

  ## Fancy highlighting in some terminals.
  local bold unbold nl gitcolour rccolour uncolour
  local host dir
  bold="" unbold="" nl="" gitcolour="" rccolour="" uncolour=""
  __mdw_set_prompt_hacks

  ## Choose the right delimiters.  Highlight root prompts specially;
  ## highlight when I'm running as some other user.  Highlight when this
  ## isn't the outermost shell on the terminal.
  local left right user u tty
  user=${USER-${LOGNAME-$(id -un)}}
  case $(id -u) in
    0)
      left=$(echo « | iconv -f UTF-8 -t //translit)
      right=$(echo » | iconv -f UTF-8 -t //translit)
      ;;
    *)
      case $user in
	mdw | mwooding | nemo) u="" left="[" right="]" ;;
	*) u="$user@" left="{" right="}" ;;
      esac
      tty=$(tty)
      case "$__mdw_tty" in
	"$tty") left="<" right=">" ;;
	*) __mdw_tty=$tty; export __mdw_tty ;;
      esac
      ;;
  esac

  ## If this session is insecure then highlight that.
  local sec_l sec_r h
  h=$(hostname)
  case ${SSH_CLIENT-nil},${SCHROOT_CHROOT_NAME-nil},$__mdw_sechost in
    nil,nil,"$h") sec_l="" sec_r="" ;;
    nil,nil,*) sec_l="(" sec_r=")" ;;
    *) sec_l="" sec_r=""
  esac

  ## If this is an schroot environment then point this out.
  hqual="$hqual${SCHROOT_CHROOT_NAME+/$SCHROOT_CHROOT_NAME}"

  ## Put together the main pieces.
  __mdw_prompt_left="$nl$bold$left$sec_l$u$host$hqual$sec_r$dir"
  __mdw_prompt_git_left="$unbold$gitcolour"
  __mdw_prompt_git_right="$uncolour$bold"
  __mdw_prompt_rc_left="$unbold$rccolour"
  __mdw_prompt_rc_right="$uncolour$bold"
  __mdw_prompt_right="$right$unbold"
}

__mdw_set_prompt () {
  case "$TERM" in
    dumb)
      case $(id -u) in 0) PS1='# ' ;; *) PS1='$ ' ;; esac
      PS2='> '
      ;;
    *)
      __mdw_last_rc=$?
      local git rc
      if type __git_ps1 >/dev/null 2>&1; then
	git="$__mdw_prompt_git_left$(__git_ps1)$__mdw_prompt_git_right"
      else
	git=""
      fi
      case $__mdw_last_rc in
	0) rc="" ;;
	*) rc="$__mdw_prompt_rc_left rc=$__mdw_last_rc$__mdw_prompt_rc_right" ;;
      esac
      PS1="$__mdw_prompt_left$git$rc$__mdw_prompt_right"
      PS2="$PS1 $bold>$unbold "
      unset __mdw_last_rc
      ;;
  esac
}

__mdw_precmd () {
  __mdw_set_prompt
  case ${STY+t} in
    t) printf "\ek%s\e\\" "$__mdw_shell" ;;
  esac
}

__mdw_preexec () {
  case ${STY+t} in
    t) printf "\ek%s\e\\" "$1" ;;
  esac
}

###--------------------------------------------------------------------------
### Some handy aliases.

alias cx='chmod +x'
alias which="command -v"
alias rc="rc -l"
rootly () {
  case $# in 0) set -- "${SHELL-/bin/sh}" ;; esac
  $__MDW_ROOTLY "$@"
}
alias r=rootly
alias re="rootly $EDITOR"
alias pstree="pstree -hl"
alias cdtmp='cd ${TMPDIR-/tmp}'
alias pushtmp='pushd ${TMPDIR-/tmp}'
alias e="$EDITOR"
alias svn="svnwrap svn"
alias @="ssh"

###--------------------------------------------------------------------------
### Colour output.

## Arrange for `ls' output to be in colour.
if __mdw_programp dircolors; then eval $(dircolors -b "$HOME/.dircolors")
else unset LS_COLORS; fi

unalias ls 2>/dev/null || :
ls () {
  if [ -t 1 ]; then command ls $LS_OPTIONS ${LS_COLORS+--color=auto} "$@"
  else command ls "$@"; fi
}

## Arrange for `grep' output to be in colour.
export GREP_COLORS="mt=01;31:ms=01;31:mc=031;31:fn=36:ln=36:bn=36:se=34"

greplike () {
  local grep=$1; shift
  if [ -t 1 ]; then
    command $grep ${GREP_COLORS+--color=always} "$@" | mdw-pager
  else
    command $grep "$@"
  fi
}
alias grep="greplike grep"
alias egrep="greplike egrep"
alias fgrep="greplike fgrep"
alias zgrep="greplike zgrep"

###--------------------------------------------------------------------------
### Other hacks.

## Turn off pagers inside Emacs shell buffers.
case "$INSIDE_EMACS" in
  2[2-9].*,comint | [3-9][0-9].*,comint) export PAGER=cat ;;
esac

###--------------------------------------------------------------------------
### More complicated shell functions.

## xt [@HOST] XTERM-ARGS
##
## Open a terminal, maybe on a remote host.
xt () {
  case "$1" in
    @*)
      local remote=${1#@} title
      shift
      if [ $# -gt 0 ]; then
	title="xterm [$remote] $1"
      else
	title="xterm [$remote]"
      fi
      (xterm -title "$title" -e ssh $remote "$@" &)
      ;;
    *)
      (xterm "$@" &)
      ;;
  esac
}

## core [y|n]
##
## Tweak core dumps on and off, or show the current status.
core () {
  case "x$1" in
    xon|xy|xyes) ulimit -Sc $(ulimit -Hc) ;;
    xoff|xn|xno) ulimit -Sc 0 ;;
    x)
      local l=$(ulimit -Sc)
      case $l in
	0) echo "Core dumps disabled" ;;
	unlimited) echo "Core dumps enabled" ;;
	*) echo "Core dump limit is $l blocks" ;;
      esac
      ;;
    *)
      echo >&2 "usage: core [y|n]"
      return 1
      ;;
  esac
}

## world [NAME]
##
## Set current security world to NAME.  With no NAME, print the currently
## selected world.
world () {
  local nfast=${NFAST_HOME-/opt/nfast}
  local kmdata
  case "$#" in
    0)
      echo "${NFAST_KMDATA#$nfast/kmdata-}"
      ;;
    *)
      if [ -d "$1" ]; then
	kmdata=$1
      elif [ -d "$nfast/kmdata-$1" ]; then
	kmdata=$nfast/kmdata-$1
      else
	echo >&2 "world: can't find world $1"
	return 1
      fi
      shift
      case "$#" in
	0) export NFAST_KMDATA=$kmdata ;;
	*) "$@" ;;
      esac
      ;;
  esac
}

## path-add [VAR] DIR
##
## Add DIR to the beginning of PATH-like variable VAR (defaults to PATH) if
## it's not there already.
path_add () {
  local pathvar export dir val
  case $# in
    1) pathvar=PATH dir=$1 export="export PATH" ;;
    2) pathvar=$1 dir=$2 export=: ;;
    *) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
  esac
  eval val=\$$pathvar
  case ":$val:" in
    *:"$dir":*) ;;
    *) val=$dir:$val ;;
  esac
  eval $pathvar=\$val
  eval $export
}

## path-remove [VAR] DIR
##
## Remove DIR from PATH-like variable VAR (defaults to PATH); it's not an
## error if DIR isn't in VAR.
path_remove () {
  local pathvar export dir val
  case $# in
    1) pathvar=PATH dir=$1 export="export PATH" ;;
    2) pathvar=$1 dir=$2 export=: ;;
    *) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
  esac
  eval val=\$$pathvar
  case ":$val:" in
    :"$dir":) val= ;;
    :"$dir":*) val=${val#$dir:} ;;
    *:"$dir":) val=${val%:$dir} ;;
    *:"$dir":*) val=${val%%:$dir:*}:${val#*:$dir:} ;;
  esac
  eval $pathvar=\$val
  eval $export
}

## pathhack [-f] +HACK|-HACK...
##
## Each HACK refers to a subdirectory of `~/bin/hacks'.  A hack name preceded
## by `+' adds the directory to the PATH; a `-' removes.  Adding a hack
## that's already on the PATH doesn't do anything unless `-f' is set, in
## which case it gets moved to the beginning.  With no arguments, print the
## currently installed hacks.
pathhack () {
  local p e force arg hack dir
  p=$PATH
  if [ $# -eq 0 ]; then
    while :; do
      e=${p%%:*}
      case "$e" in "$HOME/bin/hacks/"*) echo ${e#$HOME/bin/hacks/} ;; esac
      case "$p" in *:*) p=${p#*:} ;; *) break ;; esac
    done
    return
  fi
  force=nil
  while [ $# -gt 0 ]; do
    arg=$1
    case "$arg" in
      -f | --force) force=t; shift; continue ;;
      --) shift; break ;;
      [-+]*) ;;
      *) break; ;;
    esac
    hack=${arg#[+-]}
    dir=$HOME/bin/hacks/$hack
    if ! [ -d "$dir" ]; then
      echo "$0: path hack $hack not found"
      return 1
    fi
    case "$arg,$force,:$PATH:" in
      -*,*,*:"$dir":*) path_remove p "$dir" ;;
      +*,t,*:"$dir":*) path_remove p "$dir"; path_add p "$dir" ;;
      +*,nil,*:"$dir":*) ;;
      +*,*) path_add p "$dir" ;;
    esac
    shift
  done
  if [ $# -eq 0 ]; then PATH=$p; export PATH
  else PATH=$p "$@"; fi
}

###--------------------------------------------------------------------------
### Finishing touches.

## Make sure `$HOME/bin' is on the path.
path_add "$HOME/bin"

## Set the temporary directory again.  (A setuid or setgid program may have
## unhelpfully forgotten this for us.)
case ${TMPDIR+t} in
  t) ;;
  *) if __mdw_programp tmpdir; then eval $(tmpdir -b); fi ;;
esac

## For `root' use -- some simple molly-guards.
case $(id -u) in
  0)
    alias rm="rm -i" cp="cp -i" mv="mv -i"
    set -o noclobber
    ;;
esac

## Run any local hooks.
__mdw_source_if_exists "$HOME/.shell-local"

###----- That's all, folks --------------------------------------------------
Commit	Line	Data
74a53e28 MW	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	### Prompt machinery.
	19
	20	__mdw_set_prompt_hacks () { host=$(hostname); dir=""; }
	21
	22	__mdw_set_prompt_pieces () {
	23	local hqual
	24	hqual=""
	25
	26	## Fancy highlighting in some terminals.
	27	local bold unbold nl gitcolour rccolour uncolour
	28	local host dir
	29	bold="" unbold="" nl="" gitcolour="" rccolour="" uncolour=""
	30	__mdw_set_prompt_hacks
	31
	32	## Choose the right delimiters. Highlight root prompts specially;
	33	## highlight when I'm running as some other user. Highlight when this
	34	## isn't the outermost shell on the terminal.
	35	local left right user u tty
2ab43296	36	user=${USER-${LOGNAME-$(id -un)}}
74a53e28 MW	37	case $(id -u) in
	38	0)
	39	left=$(echo « \| iconv -f UTF-8 -t //translit)
	40	right=$(echo » \| iconv -f UTF-8 -t //translit)
	41	;;
	42	*)
	43	case $user in
	44	mdw \| mwooding \| nemo) u="" left="[" right="]" ;;
	45	*) u="$user@" left="{" right="}" ;;
	46	esac
	47	tty=$(tty)
	48	case "$__mdw_tty" in
	49	"$tty") left="<" right=">" ;;
	50	*) __mdw_tty=$tty; export __mdw_tty ;;
	51	esac
	52	;;
	53	esac
	54
	55	## If this session is insecure then highlight that.
	56	local sec_l sec_r h
	57	h=$(hostname)
	58	case ${SSH_CLIENT-nil},${SCHROOT_CHROOT_NAME-nil},$__mdw_sechost in
	59	nil,nil,"$h") sec_l="" sec_r="" ;;
	60	nil,nil,*) sec_l="(" sec_r=")" ;;
	61	*) sec_l="" sec_r=""
	62	esac
	63
	64	## If this is an schroot environment then point this out.
	65	hqual="$hqual${SCHROOT_CHROOT_NAME+/$SCHROOT_CHROOT_NAME}"
	66
	67	## Put together the main pieces.
	68	__mdw_prompt_left="$nl$bold$left$sec_l$u$host$hqual$sec_r$dir"
	69	__mdw_prompt_git_left="$unbold$gitcolour"
	70	__mdw_prompt_git_right="$uncolour$bold"
	71	__mdw_prompt_rc_left="$unbold$rccolour"
	72	__mdw_prompt_rc_right="$uncolour$bold"
	73	__mdw_prompt_right="$right$unbold"
	74	}
	75
	76	__mdw_set_prompt () {
55bd0261 MW	77	case "$TERM" in
	78	dumb)
	79	case $(id -u) in 0) PS1='# ' ;; *) PS1='$ ' ;; esac
	80	PS2='> '
	81	;;
	82	*)
	83	__mdw_last_rc=$?
	84	local git rc
	85	if type __git_ps1 >/dev/null 2>&1; then
	86	git="$__mdw_prompt_git_left$(__git_ps1)$__mdw_prompt_git_right"
	87	else
	88	git=""
	89	fi
	90	case $__mdw_last_rc in
	91	0) rc="" ;;
	92	*) rc="$__mdw_prompt_rc_left rc=$__mdw_last_rc$__mdw_prompt_rc_right" ;;
	93	esac
	94	PS1="$__mdw_prompt_left$git$rc$__mdw_prompt_right"
	95	PS2="$PS1 $bold>$unbold "
	96	unset __mdw_last_rc
	97	;;
74a53e28	98	esac
74a53e28 MW	99	}
	100
	101	__mdw_precmd () {
	102	__mdw_set_prompt
	103	case ${STY+t} in
	104	t) printf "\ek%s\e\\" "$__mdw_shell" ;;
	105	esac
	106	}
	107
	108	__mdw_preexec () {
	109	case ${STY+t} in
	110	t) printf "\ek%s\e\\" "$1" ;;
	111	esac
	112	}
	113
	114	###--------------------------------------------------------------------------
	115	### Some handy aliases.
	116
	117	alias cx='chmod +x'
	118	alias which="command -v"
	119	alias rc="rc -l"
	120	rootly () {
	121	case $# in 0) set -- "${SHELL-/bin/sh}" ;; esac
	122	$__MDW_ROOTLY "$@"
	123	}
	124	alias r=rootly
	125	alias re="rootly $EDITOR"
	126	alias pstree="pstree -hl"
	127	alias cdtmp='cd ${TMPDIR-/tmp}'
	128	alias pushtmp='pushd ${TMPDIR-/tmp}'
	129	alias e="$EDITOR"
	130	alias svn="svnwrap svn"
	131	alias @="ssh"
	132
	133	###--------------------------------------------------------------------------
	134	### Colour output.
	135
	136	## Arrange for `ls' output to be in colour.
	137	if __mdw_programp dircolors; then eval $(dircolors -b "$HOME/.dircolors")
	138	else unset LS_COLORS; fi
	139
	140	unalias ls 2>/dev/null \|\| :
	141	ls () {
	142	if [ -t 1 ]; then command ls $LS_OPTIONS ${LS_COLORS+--color=auto} "$@"
	143	else command ls "$@"; fi
	144	}
	145
	146	## Arrange for `grep' output to be in colour.
	147	export GREP_COLORS="mt=01;31:ms=01;31:mc=031;31:fn=36:ln=36:bn=36:se=34"
	148
	149	greplike () {
	150	local grep=$1; shift
	151	if [ -t 1 ]; then
	152	command $grep ${GREP_COLORS+--color=always} "$@" \| mdw-pager
	153	else
	154	command $grep "$@"
	155	fi
	156	}
	157	alias grep="greplike grep"
	158	alias egrep="greplike egrep"
	159	alias fgrep="greplike fgrep"
	160	alias zgrep="greplike zgrep"
	161
	162	###--------------------------------------------------------------------------
163	### Other hacks.
164
165	## Turn off pagers inside Emacs shell buffers.
166	case "$INSIDE_EMACS" in
167	2[2-9].,comint \| [3-9][0-9].,comint) export PAGER=cat ;;
168	esac
169
170	###--------------------------------------------------------------------------
171	### More complicated shell functions.
172
173	## xt [@HOST] XTERM-ARGS
174	##
175	## Open a terminal, maybe on a remote host.
176	xt () {
177	case "$1" in
178	@*)
179	local remote=${1#@} title
180	shift
181	if [ $# -gt 0 ]; then
182	title="xterm [$remote] $1"
183	else
184	title="xterm [$remote]"
185	fi
186	(xterm -title "$title" -e ssh $remote "$@" &)
187	;;
188	*)
189	(xterm "$@" &)
190	;;
191	esac
192	}
193
194	## core [y\|n]
195	##
196	## Tweak core dumps on and off, or show the current status.
197	core () {
198	case "x$1" in
199	xon\|xy\|xyes) ulimit -Sc $(ulimit -Hc) ;;
200	xoff\|xn\|xno) ulimit -Sc 0 ;;
201	x)
202	local l=$(ulimit -Sc)
203	case $l in
204	0) echo "Core dumps disabled" ;;
205	unlimited) echo "Core dumps enabled" ;;
206	*) echo "Core dump limit is $l blocks" ;;
207	esac
208	;;
209	*)
210	echo >&2 "usage: core [y\|n]"
211	return 1
212	;;
213	esac
214	}
215
216	## world [NAME]
217	##
218	## Set current security world to NAME. With no NAME, print the currently
219	## selected world.
220	world () {
221	local nfast=${NFAST_HOME-/opt/nfast}
222	local kmdata
223	case "$#" in
224	0)
225	echo "${NFAST_KMDATA#$nfast/kmdata-}"
226	;;
227	*)
228	if [ -d "$1" ]; then
229	kmdata=$1
230	elif [ -d "$nfast/kmdata-$1" ]; then
231	kmdata=$nfast/kmdata-$1
232	else
233	echo >&2 "world: can't find world $1"
234	return 1
235	fi
236	shift
237	case "$#" in
238	0) export NFAST_KMDATA=$kmdata ;;
239	*) "$@" ;;
240	esac
241	;;
242	esac
243	}
244
245	## path-add [VAR] DIR
246	##
247	## Add DIR to the beginning of PATH-like variable VAR (defaults to PATH) if
248	## it's not there already.
249	path_add () {
250	local pathvar export dir val
251	case $# in
252	1) pathvar=PATH dir=$1 export="export PATH" ;;
253	2) pathvar=$1 dir=$2 export=: ;;
254	*) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
255	esac
256	eval val=\$$pathvar
257	case ":$val:" in
258	:"$dir":) ;;
259	*) val=$dir:$val ;;
260	esac
261	eval $pathvar=\$val
262	eval $export
263	}
264
265	## path-remove [VAR] DIR
266	##
267	## Remove DIR from PATH-like variable VAR (defaults to PATH); it's not an
268	## error if DIR isn't in VAR.
269	path_remove () {
270	local pathvar export dir val
271	case $# in
272	1) pathvar=PATH dir=$1 export="export PATH" ;;
273	2) pathvar=$1 dir=$2 export=: ;;
274	*) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
275	esac
276	eval val=\$$pathvar
277	case ":$val:" in
278	:"$dir":) val= ;;
279	:"$dir":*) val=${val#$dir:} ;;
280	*:"$dir":) val=${val%:$dir} ;;
281	:"$dir":) val=${val%%:$dir:}:${val#:$dir:} ;;
282	esac
283	eval $pathvar=\$val
284	eval $export
285	}
286
287	## pathhack [-f] +HACK\|-HACK...
288	##
289	## Each HACK refers to a subdirectory of `~/bin/hacks'. A hack name preceded
290	## by `+' adds the directory to the PATH; a `-' removes. Adding a hack
291	## that's already on the PATH doesn't do anything unless `-f' is set, in
292	## which case it gets moved to the beginning. With no arguments, print the
293	## currently installed hacks.
294	pathhack () {
295	local p e force arg hack dir
296	p=$PATH
297	if [ $# -eq 0 ]; then
298	while :; do
299	e=${p%%:*}
300	case "$e" in "$HOME/bin/hacks/"*) echo ${e#$HOME/bin/hacks/} ;; esac
301	case "$p" in :) p=${p#:} ;; ) break ;; esac
302	done
303	return
304	fi
305	force=nil
306	while [ $# -gt 0 ]; do
307	arg=$1
308	case "$arg" in
309	-f \| --force) force=t; shift; continue ;;
310	--) shift; break ;;
311	[-+]*) ;;
312	*) break; ;;
313	esac
314	hack=${arg#[+-]}
315	dir=$HOME/bin/hacks/$hack
316	if ! [ -d "$dir" ]; then
317	echo "$0: path hack $hack not found"
318	return 1
319	fi
320	case "$arg,$force,:$PATH:" in
321	-,,:"$dir":) path_remove p "$dir" ;;
322	+,t,:"$dir":*) path_remove p "$dir"; path_add p "$dir" ;;
323	+,nil,:"$dir":*) ;;
324	+,) path_add p "$dir" ;;
325	esac
326	shift
327	done
328	if [ $# -eq 0 ]; then PATH=$p; export PATH
329	else PATH=$p "$@"; fi
330	}
331
332	###--------------------------------------------------------------------------
333	### Finishing touches.
334
4cb8b8da MW	335	## Make sure `$HOME/bin' is on the path.
	336	path_add "$HOME/bin"
	337
6054bdb6 MW	338	## Set the temporary directory again. (A setuid or setgid program may have
6054bdb6 MW	339	## unhelpfully forgotten this for us.)
0a030a39 MW	340	case ${TMPDIR+t} in
	341	t) ;;
	342	*) if __mdw_programp tmpdir; then eval $(tmpdir -b); fi ;;
	343	esac
6054bdb6	344
74a53e28 MW	345	## For `root' use -- some simple molly-guards.
	346	case $(id -u) in
	347	0)
	348	alias rm="rm -i" cp="cp -i" mv="mv -i"
	349	set -o noclobber
	350	;;
	351	esac
	352
	353	## Run any local hooks.
	354	__mdw_source_if_exists "$HOME/.shell-local"
	355
	356	###----- That's all, folks --------------------------------------------------