[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
}

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

###--------------------------------------------------------------------------
### 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 () {
  __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
}

__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.

## 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
5e06367f MW	17	## Set the temporary directory again. (A setuid or setgid program may have
	18	## unhelpfully forgotten this for us.)
	19	case ${TMPDIR+t} in t) ;; *) eval $(tmpdir -b); esac
	20
74a53e28 MW	21	###--------------------------------------------------------------------------
	22	### Prompt machinery.
	23
	24	__mdw_set_prompt_hacks () { host=$(hostname); dir=""; }
	25
	26	__mdw_set_prompt_pieces () {
	27	local hqual
	28	hqual=""
	29
	30	## Fancy highlighting in some terminals.
	31	local bold unbold nl gitcolour rccolour uncolour
	32	local host dir
	33	bold="" unbold="" nl="" gitcolour="" rccolour="" uncolour=""
	34	__mdw_set_prompt_hacks
	35
	36	## Choose the right delimiters. Highlight root prompts specially;
	37	## highlight when I'm running as some other user. Highlight when this
	38	## isn't the outermost shell on the terminal.
	39	local left right user u tty
2ab43296	40	user=${USER-${LOGNAME-$(id -un)}}
74a53e28 MW	41	case $(id -u) in
	42	0)
	43	left=$(echo « \| iconv -f UTF-8 -t //translit)
	44	right=$(echo » \| iconv -f UTF-8 -t //translit)
	45	;;
	46	*)
	47	case $user in
	48	mdw \| mwooding \| nemo) u="" left="[" right="]" ;;
	49	*) u="$user@" left="{" right="}" ;;
	50	esac
	51	tty=$(tty)
	52	case "$__mdw_tty" in
	53	"$tty") left="<" right=">" ;;
	54	*) __mdw_tty=$tty; export __mdw_tty ;;
	55	esac
	56	;;
	57	esac
	58
	59	## If this session is insecure then highlight that.
	60	local sec_l sec_r h
	61	h=$(hostname)
	62	case ${SSH_CLIENT-nil},${SCHROOT_CHROOT_NAME-nil},$__mdw_sechost in
	63	nil,nil,"$h") sec_l="" sec_r="" ;;
	64	nil,nil,*) sec_l="(" sec_r=")" ;;
	65	*) sec_l="" sec_r=""
	66	esac
	67
	68	## If this is an schroot environment then point this out.
	69	hqual="$hqual${SCHROOT_CHROOT_NAME+/$SCHROOT_CHROOT_NAME}"
	70
	71	## Put together the main pieces.
	72	__mdw_prompt_left="$nl$bold$left$sec_l$u$host$hqual$sec_r$dir"
	73	__mdw_prompt_git_left="$unbold$gitcolour"
	74	__mdw_prompt_git_right="$uncolour$bold"
	75	__mdw_prompt_rc_left="$unbold$rccolour"
	76	__mdw_prompt_rc_right="$uncolour$bold"
	77	__mdw_prompt_right="$right$unbold"
	78	}
	79
	80	__mdw_set_prompt () {
	81	__mdw_last_rc=$?
	82	local git rc
	83	if type __git_ps1 >/dev/null 2>&1; then
	84	git="$__mdw_prompt_git_left$(__git_ps1)$__mdw_prompt_git_right"
	85	else
	86	git=""
	87	fi
	88	case $__mdw_last_rc in
	89	0) rc="" ;;
	90	*) rc="$__mdw_prompt_rc_left rc=$__mdw_last_rc$__mdw_prompt_rc_right" ;;
	91	esac
	92	PS1="$__mdw_prompt_left$git$rc$__mdw_prompt_right"
	93	PS2="$PS1 $bold>$unbold "
	94	unset __mdw_last_rc
	95	}
	96
	97	__mdw_precmd () {
	98	__mdw_set_prompt
	99	case ${STY+t} in
	100	t) printf "\ek%s\e\\" "$__mdw_shell" ;;
	101	esac
	102	}
	103
	104	__mdw_preexec () {
105	case ${STY+t} in
106	t) printf "\ek%s\e\\" "$1" ;;
107	esac
108	}
109
110	###--------------------------------------------------------------------------
111	### Some handy aliases.
112
113	alias cx='chmod +x'
114	alias which="command -v"
115	alias rc="rc -l"
116	rootly () {
117	case $# in 0) set -- "${SHELL-/bin/sh}" ;; esac
118	$__MDW_ROOTLY "$@"
119	}
120	alias r=rootly
121	alias re="rootly $EDITOR"
122	alias pstree="pstree -hl"
123	alias cdtmp='cd ${TMPDIR-/tmp}'
124	alias pushtmp='pushd ${TMPDIR-/tmp}'
125	alias e="$EDITOR"
126	alias svn="svnwrap svn"
127	alias @="ssh"
128
129	###--------------------------------------------------------------------------
130	### Colour output.
131
132	## Arrange for `ls' output to be in colour.
133	if __mdw_programp dircolors; then eval $(dircolors -b "$HOME/.dircolors")
134	else unset LS_COLORS; fi
135
136	unalias ls 2>/dev/null \|\| :
137	ls () {
138	if [ -t 1 ]; then command ls $LS_OPTIONS ${LS_COLORS+--color=auto} "$@"
139	else command ls "$@"; fi
140	}
141
142	## Arrange for `grep' output to be in colour.
143	export GREP_COLORS="mt=01;31:ms=01;31:mc=031;31:fn=36:ln=36:bn=36:se=34"
144
145	greplike () {
146	local grep=$1; shift
147	if [ -t 1 ]; then
148	command $grep ${GREP_COLORS+--color=always} "$@" \| mdw-pager
149	else
150	command $grep "$@"
151	fi
152	}
153	alias grep="greplike grep"
154	alias egrep="greplike egrep"
155	alias fgrep="greplike fgrep"
156	alias zgrep="greplike zgrep"
157
158	###--------------------------------------------------------------------------
159	### Other hacks.
160
161	## Turn off pagers inside Emacs shell buffers.
162	case "$INSIDE_EMACS" in
163	2[2-9].,comint \| [3-9][0-9].,comint) export PAGER=cat ;;
164	esac
165
166	###--------------------------------------------------------------------------
167	### More complicated shell functions.
168
169	## xt [@HOST] XTERM-ARGS
170	##
171	## Open a terminal, maybe on a remote host.
172	xt () {
173	case "$1" in
174	@*)
175	local remote=${1#@} title
176	shift
177	if [ $# -gt 0 ]; then
178	title="xterm [$remote] $1"
179	else
180	title="xterm [$remote]"
181	fi
182	(xterm -title "$title" -e ssh $remote "$@" &)
183	;;
184	*)
185	(xterm "$@" &)
186	;;
187	esac
188	}
189
190	## core [y\|n]
191	##
192	## Tweak core dumps on and off, or show the current status.
193	core () {
194	case "x$1" in
195	xon\|xy\|xyes) ulimit -Sc $(ulimit -Hc) ;;
196	xoff\|xn\|xno) ulimit -Sc 0 ;;
197	x)
198	local l=$(ulimit -Sc)
199	case $l in
200	0) echo "Core dumps disabled" ;;
201	unlimited) echo "Core dumps enabled" ;;
202	*) echo "Core dump limit is $l blocks" ;;
203	esac
204	;;
205	*)
206	echo >&2 "usage: core [y\|n]"
207	return 1
208	;;
209	esac
210	}
211
212	## world [NAME]
213	##
214	## Set current security world to NAME. With no NAME, print the currently
215	## selected world.
216	world () {
217	local nfast=${NFAST_HOME-/opt/nfast}
218	local kmdata
219	case "$#" in
220	0)
221	echo "${NFAST_KMDATA#$nfast/kmdata-}"
222	;;
223	*)
224	if [ -d "$1" ]; then
225	kmdata=$1
226	elif [ -d "$nfast/kmdata-$1" ]; then
227	kmdata=$nfast/kmdata-$1
228	else
229	echo >&2 "world: can't find world $1"
230	return 1
231	fi
232	shift
233	case "$#" in
234	0) export NFAST_KMDATA=$kmdata ;;
235	*) "$@" ;;
236	esac
237	;;
238	esac
239	}
240
241	## path-add [VAR] DIR
242	##
243	## Add DIR to the beginning of PATH-like variable VAR (defaults to PATH) if
244	## it's not there already.
245	path_add () {
246	local pathvar export dir val
247	case $# in
248	1) pathvar=PATH dir=$1 export="export PATH" ;;
249	2) pathvar=$1 dir=$2 export=: ;;
250	*) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
251	esac
252	eval val=\$$pathvar
253	case ":$val:" in
254	:"$dir":) ;;
255	*) val=$dir:$val ;;
256	esac
257	eval $pathvar=\$val
258	eval $export
259	}
260
261	## path-remove [VAR] DIR
262	##
263	## Remove DIR from PATH-like variable VAR (defaults to PATH); it's not an
264	## error if DIR isn't in VAR.
265	path_remove () {
266	local pathvar export dir val
267	case $# in
268	1) pathvar=PATH dir=$1 export="export PATH" ;;
269	2) pathvar=$1 dir=$2 export=: ;;
270	*) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
271	esac
272	eval val=\$$pathvar
273	case ":$val:" in
274	:"$dir":) val= ;;
275	:"$dir":*) val=${val#$dir:} ;;
276	*:"$dir":) val=${val%:$dir} ;;
277	:"$dir":) val=${val%%:$dir:}:${val#:$dir:} ;;
278	esac
279	eval $pathvar=\$val
280	eval $export
281	}
282
283	## pathhack [-f] +HACK\|-HACK...
284	##
285	## Each HACK refers to a subdirectory of `~/bin/hacks'. A hack name preceded
286	## by `+' adds the directory to the PATH; a `-' removes. Adding a hack
287	## that's already on the PATH doesn't do anything unless `-f' is set, in
288	## which case it gets moved to the beginning. With no arguments, print the
289	## currently installed hacks.
290	pathhack () {
291	local p e force arg hack dir
292	p=$PATH
293	if [ $# -eq 0 ]; then
294	while :; do
295	e=${p%%:*}
296	case "$e" in "$HOME/bin/hacks/"*) echo ${e#$HOME/bin/hacks/} ;; esac
297	case "$p" in :) p=${p#:} ;; ) break ;; esac
298	done
299	return
300	fi
301	force=nil
302	while [ $# -gt 0 ]; do
303	arg=$1
304	case "$arg" in
305	-f \| --force) force=t; shift; continue ;;
306	--) shift; break ;;
307	[-+]*) ;;
308	*) break; ;;
309	esac
310	hack=${arg#[+-]}
311	dir=$HOME/bin/hacks/$hack
312	if ! [ -d "$dir" ]; then
313	echo "$0: path hack $hack not found"
314	return 1
315	fi
316	case "$arg,$force,:$PATH:" in
317	-,,:"$dir":) path_remove p "$dir" ;;
318	+,t,:"$dir":*) path_remove p "$dir"; path_add p "$dir" ;;
319	+,nil,:"$dir":*) ;;
320	+,) path_add p "$dir" ;;
321	esac
322	shift
323	done
324	if [ $# -eq 0 ]; then PATH=$p; export PATH
325	else PATH=$p "$@"; fi
326	}
327
328	###--------------------------------------------------------------------------
329	### Finishing touches.
330
331	## For `root' use -- some simple molly-guards.
332	case $(id -u) in
333	0)
334	alias rm="rm -i" cp="cp -i" mv="mv -i"
335	set -o noclobber
336	;;
337	esac
338
339	## Run any local hooks.
340	__mdw_source_if_exists "$HOME/.shell-local"
341
342	###----- That's all, folks --------------------------------------------------