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200cab2bb18e85857612a00e17f86b887ae14c57
[code/vcsh.git] / vcsh
1 #!/bin/sh
2
3 # This program is licensed under the GNU GPL version 2 or later.
4 # (c) Richard "RichiH" Hartmann <richih@debian.org>, 2011-2014
5 # For details, see LICENSE. To submit patches, you have to agree to
6 # license your code under the GNU GPL version 2 or later.
7
8 # While the following is not legally binding, the author would like to
9 # explain the choice of GPLv2+ over GPLv3+.
10 # The author prefers GPLv3+ over GPLv2+ but feels it's better to maintain
11 # full compatibility's with Git. In case Git ever changes its licensing terms,
12 # which is admittedly extremely unlikely to the point of being impossible,
13 # this software will most likely follow suit.
14
15 # This should always be the first line of code to facilitate debugging
16 [ -n "$VCSH_DEBUG" ] && set -vx
17
18
19 # If '.git-HEAD' is appended to the version, you are seeing an unreleased
20 # version of vcsh; the master branch is supposed to be clean at all times
21 # so you can most likely just use it nonetheless
22 VERSION='1.20140508'
23 SELF=$(basename $0)
24
25 fatal() {
26         echo "$SELF: fatal: $1" >&2
27         exit $2
28 }
29
30 # We need to run getops as soon as possible so we catch -d and other
31 # options that will modify our behaviour.
32 # Commands are handled at the end of this script.
33 while getopts "c:dv" flag; do
34         if [ x"$1" = x'-d' ] || [ x"$1" = x'--debug' ]; then
35                 set -vx
36                 VCSH_DEBUG=1
37                 echo "debug mode on"
38                 echo "$SELF $VERSION"
39         elif [ x"$1" = x'-v' ]; then
40                 VCSH_VERBOSE=1
41                 echo "verbose mode on"
42                 echo "$SELF $VERSION"
43         elif [ x"$1" = x'-c' ]; then
44                 VCSH_OPTION_CONFIG=$OPTARG
45         fi
46         shift 1
47 done
48
49 source_all() {
50         # Source file even if it's in $PWD and does not have any slashes in it
51         case $1 in
52                 */*) . "$1";;
53                 *)   . "$PWD/$1";;
54         esac;
55 }
56
57
58 # Read configuration and set defaults if anything's not set
59 [ -n "$VCSH_DEBUG" ]                  && set -vx
60 : ${XDG_CONFIG_HOME:="$HOME/.config"}
61
62 # Read configuration files if there are any
63 [ -r "/etc/vcsh/config" ]             && . "/etc/vcsh/config"
64 [ -r "$XDG_CONFIG_HOME/vcsh/config" ] && . "$XDG_CONFIG_HOME/vcsh/config"
65 if [ -n "$VCSH_OPTION_CONFIG" ]; then
66         # Source $VCSH_OPTION_CONFIG if it can be read and is in $PWD of $PATH
67         if [ -r "$VCSH_OPTION_CONFIG" ]; then
68                 source_all "$VCSH_OPTION_CONFIG"
69         else
70                 fatal "Can not read configuration file '$VCSH_OPTION_CONFIG'" 1
71         fi
72 fi
73 [ -n "$VCSH_DEBUG" ]                  && set -vx
74
75 # Read defaults
76 : ${VCSH_REPO_D:="$XDG_CONFIG_HOME/vcsh/repo.d"}
77 : ${VCSH_HOOK_D:="$XDG_CONFIG_HOME/vcsh/hooks-enabled"}
78 : ${VCSH_BASE:="$HOME"}
79 : ${VCSH_GITIGNORE:=exact}
80 : ${VCSH_GITATTRIBUTES:=none}
81 : ${VCSH_WORKTREE:=absolute}
82
83 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
84         fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
85 fi
86
87 if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ] && [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
88         fatal "'\$VCSH_WORKTREE' must equal 'absolute', or 'relative'" 1
89 fi
90
91
92 help() {
93         echo "usage: $SELF <options> <command>
94
95    options:
96    -c <file>            Source file
97    -d                   Enable debug mode
98    -v                   Enable verbose mode
99
100    commands:
101    clone [-b <branch>] \\
102          <remote> \\
103          [<repo>]       Clone from an existing repository
104    commit               Commit in all repositories
105    delete <repo>        Delete an existing repository
106    enter <repo>         Enter repository; spawn new instance of \$SHELL
107    help                 Display this help text
108    init <repo>          Initialize a new repository
109    list                 List all repositories
110    list-tracked         List all files tracked by vcsh
111    list-tracked-by \\
112         <repo>          List files tracked by a repository
113    pull                 Pull from all vcsh remotes
114    push                 Push to vcsh remotes
115    rename <repo> \\
116           <newname>     Rename repository
117    run <repo> \\
118        <command>        Use this repository
119    status [<repo>]      Show statuses of all/one vcsh repositories
120    upgrade <repo>       Upgrade repository to currently recommended settings
121    version              Print version information
122    which <substring>    Find substring in name of any tracked file
123    write-gitignore \\
124    <repo>               Write .gitignore.d/<repo> via git ls-files
125
126    <repo> <git command> Shortcut to run git commands directly
127    <repo>               Shortcut to enter repository" >&2
128 }
129
130 debug() {
131         [ -n "$VCSH_DEBUG" ] && echo "$SELF: debug: $@"
132 }
133
134 verbose() {
135         if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
136 }
137
138 error() {
139         echo "$SELF: error: $1" >&2
140 }
141
142 info() {
143         echo "$SELF: info: $1"
144 }
145
146 clone() {
147         hook pre-clone
148         init
149         git remote add origin "$GIT_REMOTE"
150         git checkout -b "$VCSH_BRANCH" || return $?
151         git config branch."$VCSH_BRANCH".remote origin
152         git config branch."$VCSH_BRANCH".merge  refs/heads/"$VCSH_BRANCH"
153         if [ $(git ls-remote origin "$VCSH_BRANCH" 2> /dev/null | wc -l ) -lt 1 ]; then
154                 info "remote is empty, not merging anything"
155                 exit
156         fi
157         git fetch origin "$VCSH_BRANCH"
158         hook pre-merge
159         git ls-tree -r --name-only origin/"$VCSH_BRANCH" | (while read object; do
160                 [ -e "$object" ] &&
161                         error "'$object' exists." &&
162                         VCSH_CONFLICT=1
163         done
164         [ x"$VCSH_CONFLICT" = x'1' ]) &&
165                 fatal "will stop after fetching and not try to merge!
166   Once this situation has been resolved, run 'vcsh $VCSH_REPO_NAME pull' to finish cloning." 17
167         git merge origin/"$VCSH_BRANCH"
168         hook post-merge
169         hook post-clone
170         retire
171         hook post-clone-retired
172 }
173
174 commit() {
175         hook pre-commit
176         for VCSH_REPO_NAME in $(list); do
177                 echo "$VCSH_REPO_NAME: "
178                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
179                 use
180                 git commit --untracked-files=no --quiet
181                 VCSH_COMMAND_RETURN_CODE=$?
182                 echo
183         done
184         hook post-commit
185 }
186
187 delete() {
188         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
189         use
190         info "This operation WILL DESTROY DATA!"
191         files=$(git ls-files)
192         echo "These files will be deleted:
193
194 $files
195
196 AGAIN, THIS WILL DELETE YOUR DATA!
197 To continue, type 'Yes, do as I say'"
198         read answer
199         [ "x$answer" = 'xYes, do as I say' ] || exit 16
200         for file in $files; do
201                 rm -f $file || info "could not delete '$file', continuing with deletion"
202         done
203         rm -rf "$GIT_DIR" || error "could not delete '$GIT_DIR'"
204 }
205
206 enter() {
207         hook pre-enter
208         use
209         $SHELL
210         hook post-enter
211 }
212
213 git_dir_exists() {
214         [ -d "$GIT_DIR" ] || fatal "no repository found for '$VCSH_REPO_NAME'" 12
215 }
216
217 hook() {
218         for hook in "$VCSH_HOOK_D/$1"* "$VCSH_HOOK_D/$VCSH_REPO_NAME.$1"*; do
219                 [ -x "$hook" ] || continue
220                 verbose "executing '$hook'"
221                 "$hook"
222         done
223 }
224
225 init() {
226         hook pre-init
227         [ ! -e "$GIT_DIR" ] || fatal "'$GIT_DIR' exists" 10
228         mkdir -p "$VCSH_BASE" || fatal "could not create '$VCSH_BASE'" 50
229         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
230         git init --shared=0600
231         upgrade
232         hook post-init
233 }
234
235 list() {
236         for repo in "$VCSH_REPO_D"/*.git; do
237                 [ -d "$repo" ] && [ -r "$repo" ] && echo "$(basename "$repo" .git)"
238         done
239 }
240
241 get_files() {
242         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
243         git ls-files
244 }
245
246 list_tracked() {
247         for VCSH_REPO_NAME in $(list); do
248                 get_files
249         done | sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | \
250             sed 's/[,\&]/\\&/g')," | sort -u
251 }
252
253 list_tracked_by() {
254         use
255         git ls-files | sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | \
256             sed 's/[,\&]/\\&/g')," | sort -u
257 }
258
259 pull() {
260         hook pre-pull
261         for VCSH_REPO_NAME in $(list); do
262                 printf '%s: ' "$VCSH_REPO_NAME"
263                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
264                 use
265                 git pull
266                 VCSH_COMMAND_RETURN_CODE=$?
267                 echo
268         done
269         hook post-pull
270 }
271
272 push() {
273         hook pre-push
274         for VCSH_REPO_NAME in $(list); do
275                 printf '%s: ' "$VCSH_REPO_NAME"
276                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
277                 use
278                 git push
279                 VCSH_COMMAND_RETURN_CODE=$?
280                 echo
281         done
282         hook post-push
283 }
284
285 retire() {
286         unset VCSH_DIRECTORY
287 }
288
289 rename() {
290         git_dir_exists
291         [ -d "$GIT_DIR_NEW" ] && fatal "'$GIT_DIR_NEW' exists" 54
292         mv -f "$GIT_DIR" "$GIT_DIR_NEW" || fatal "Could not mv '$GIT_DIR' '$GIT_DIR_NEW'" 52
293
294         # Now that the repository has been renamed, we need to fix up its configuration
295         # Overwrite old name..
296         GIT_DIR=$GIT_DIR_NEW
297         VCSH_REPO_NAME=$VCSH_REPO_NAME_NEW
298         # ..and clobber all old configuration
299         upgrade
300 }
301
302 run() {
303         hook pre-run
304         use
305         "$@"
306         VCSH_COMMAND_RETURN_CODE=$?
307         hook post-run
308 }
309
310 status() {
311         if [ -n "$VCSH_REPO_NAME" ]; then
312                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
313                 use
314                 git status --short --untracked-files='no'
315                 VCSH_COMMAND_RETURN_CODE=$?
316         else
317                 for VCSH_REPO_NAME in $(list); do
318                         echo "$VCSH_REPO_NAME:"
319                         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
320                         use
321                         git status --short --untracked-files='no'
322                         VCSH_COMMAND_RETURN_CODE=$?
323                         echo
324                 done
325         fi
326 }
327
328 upgrade() {
329         hook pre-upgrade
330         # fake-bare repositories are not bare, actually. Set this to false
331         # because otherwise Git complains "fatal: core.bare and core.worktree
332         # do not make sense"
333         git config core.bare false
334         # core.worktree may be absolute or relative to $GIT_DIR, depending on
335         # user preference
336         if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ]; then
337                 git config core.worktree "$(cd "$GIT_DIR" && GIT_WORK_TREE=$VCSH_BASE git rev-parse --show-cdup)"
338         elif [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
339                 git config core.worktree "$VCSH_BASE"
340         fi
341         [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
342         [ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && git config core.attributesfile ".gitattributes.d/$VCSH_REPO_NAME"
343         git config vcsh.vcsh 'true'
344         use
345         [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME"
346         [ -e "$VCSH_BASE/.gitattributes.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitattributes.d/$VCSH_REPO_NAME"
347         hook post-upgrade
348 }
349
350 use() {
351         git_dir_exists
352         VCSH_DIRECTORY=$VCSH_REPO_NAME; export VCSH_DIRECTORY
353 }
354
355 which() {
356         for VCSH_REPO_NAME in $(list); do
357                 for VCSH_FILE in $(get_files); do
358                         echo "$VCSH_FILE" | grep -q "$VCSH_COMMAND_PARAMETER" && echo "$VCSH_REPO_NAME: $VCSH_FILE"
359                 done
360         done | sort -u
361 }
362
363 write_gitignore() {
364         # Don't do anything if the user does not want to write gitignore
365         if [ "x$VCSH_GITIGNORE" = 'xnone' ]; then
366                 info "Not writing gitignore as '\$VCSH_GITIGNORE' is set to 'none'"
367                 exit
368         fi
369
370         use
371         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
372         OLDIFS=$IFS
373         IFS=$(printf '\n\t')
374         gitignores=$(for file in $(git ls-files); do
375                 while true; do
376                         echo "$file"; new=${file%/*}
377                         [ x"$file" = x"$new" ] && break
378                         file=$new
379                 done;
380         done | sort -u)
381
382         # Contrary to GNU mktemp, mktemp on BSD/OSX requires a template for temp files
383         # Using a template makes GNU mktemp default to $PWD and not #TMPDIR for tempfile location
384         # To make every OS happy, set full path explicitly
385         tempfile=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal "could not create tempfile: '${tempfile}'" 51
386
387         echo '*' > "$tempfile" || fatal "could not write to '$tempfile'" 57
388         for gitignore in $gitignores; do
389                 echo "$gitignore" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57
390                 if [ "x$VCSH_GITIGNORE" = 'xrecursive' ] && [ -d "$gitignore" ]; then
391                         { echo "$gitignore/*" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
392                 fi
393         done
394         IFS=$OLDIFS
395         if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
396                 rm -f "$tempfile" || error "could not delete '$tempfile'"
397                 exit
398         fi
399         if [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ]; then
400                 info "'$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' differs from new data, moving it to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'"
401                 mv -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak" ||
402                         fatal "could not move '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'" 53
403         fi
404         mv -f "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ||
405                 fatal "could not move '$tempfile' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME'" 53
406 }
407
408 debug $(git version)
409
410 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
411         fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
412 fi
413
414 VCSH_COMMAND=$1; export VCSH_COMMAND
415
416 case $VCSH_COMMAND in
417         clon|clo|cl) VCSH_COMMAND=clone;;
418         commi|comm|com|co) VCSH_COMMAND=commit;;
419         delet|dele|del|de) VCSH_COMMAND=delete;;
420         ente|ent|en) VCSH_COMMAND=enter;;
421         hel|he) VCSH_COMMAND=help;;
422         ini|in) VCSH_COMMAND=init;;
423         pul) VCSH_COMMAND=pull;;
424         pus) VCSH_COMMAND=push;;
425         renam|rena|ren|re) VCSH_COMMAND=rename;;
426         ru) VCSH_COMMAND=run;;
427         statu|stat|sta|st) VCSH_COMMAND=status;;
428         upgrad|upgra|upgr|up) VCSH_COMMAND=upgrade;;
429         versio|versi|vers|ver|ve) VCSH_COMMAND=version;;
430         which|whi|wh) VCSH_COMMAND=which;;
431         write|writ|wri|wr) VCSH_COMMAND=write-gitignore;;
432 esac    
433
434 if [ x"$VCSH_COMMAND" = x'clone' ]; then
435         if [ "$2" = -b ]; then
436                 VCSH_BRANCH="$3"
437                 shift
438                 shift
439         else
440                 VCSH_BRANCH=master
441         fi
442         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a remote" 1
443         GIT_REMOTE="$2"
444         [ -n "$3" ] && VCSH_REPO_NAME=$3 || VCSH_REPO_NAME=$(basename "${GIT_REMOTE#*:}" .git)
445         [ -z "$VCSH_REPO_NAME" ] && fatal "$VCSH_COMMAND: could not determine repository name" 1
446         export VCSH_REPO_NAME
447         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
448 elif [ "$VCSH_COMMAND" = 'version' ]; then
449         echo "$SELF $VERSION"
450         git version
451         exit
452 elif [ x"$VCSH_COMMAND" = x'which' ]; then
453         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a filename" 1
454         [ -n "$3" ] && fatal "$VCSH_COMMAND: too many parameters" 1
455         VCSH_COMMAND_PARAMETER=$2; export VCSH_COMMAND_PARAMETER
456 elif [ x"$VCSH_COMMAND" = x'delete' ]           ||
457      [ x"$VCSH_COMMAND" = x'enter' ]            ||
458      [ x"$VCSH_COMMAND" = x'init' ]             ||
459      [ x"$VCSH_COMMAND" = x'list-tracked-by' ]  ||
460      [ x"$VCSH_COMMAND" = x'rename' ]           ||
461      [ x"$VCSH_COMMAND" = x'run' ]              ||
462      [ x"$VCSH_COMMAND" = x'upgrade' ]          ||
463      [ x"$VCSH_COMMAND" = x'write-gitignore' ]; then
464         [ -z "$2" ]                                     && fatal "$VCSH_COMMAND: please specify repository to work on" 1
465         [ x"$VCSH_COMMAND" = x'rename' ] && [ -z "$3" ] && fatal "$VCSH_COMMAND: please specify a target name" 1
466         [ x"$VCSH_COMMAND" = x'run'    ] && [ -z "$3" ] && fatal "$VCSH_COMMAND: please specify a command" 1
467         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
468         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
469         [ x"$VCSH_COMMAND" = x'rename' ] && { VCSH_REPO_NAME_NEW=$3; export VCSH_REPO_NAME_NEW;
470                                               GIT_DIR_NEW=$VCSH_REPO_D/$VCSH_REPO_NAME_NEW.git; export GIT_DIR_NEW; }
471         [ x"$VCSH_COMMAND" = x'run' ]    && shift 2
472 elif [ x"$VCSH_COMMAND" = x'commit' ] ||
473      [ x"$VCSH_COMMAND" = x'list'   ] ||
474      [ x"$VCSH_COMMAND" = x'list-tracked' ] ||
475      [ x"$VCSH_COMMAND" = x'pull'   ] ||
476      [ x"$VCSH_COMMAND" = x'push'   ]; then
477         :
478 elif [ x"$VCSH_COMMAND" = x'status' ]; then
479         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
480 elif [ -n "$2" ]; then
481         VCSH_COMMAND='run'; export VCSH_COMMAND
482         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
483         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
484         [ -d "$GIT_DIR" ] || { help; exit 1; }
485         shift 1
486         set -- "git" "$@"
487 elif [ -n "$VCSH_COMMAND" ]; then
488         VCSH_COMMAND='enter'; export VCSH_COMMAND
489         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
490         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
491         [ -d "$GIT_DIR" ] || { help; exit 1; }
492 else
493         # $1 is empty, or 'help'
494         help && exit
495 fi
496
497 # Did we receive a directory instead of a name?
498 # Mangle the input to fit normal operation.
499 if echo "$VCSH_REPO_NAME" | grep -q '/'; then
500         GIT_DIR=$VCSH_REPO_NAME; export GIT_DIR
501         VCSH_REPO_NAME=$(basename "$VCSH_REPO_NAME" .git); export VCSH_REPO_NAME
502 fi
503
504 check_dir() {
505         check_directory="$1"
506         if [ ! -d "$check_directory" ]; then
507                 if [ -e "$check_directory" ]; then
508                         fatal "'$check_directory' exists but is not a directory" 13
509                 else
510                         verbose "attempting to create '$check_directory'"
511                         mkdir -p "$check_directory" || fatal "could not create '$check_directory'" 50
512                 fi
513         fi
514 }
515
516 check_dir "$VCSH_REPO_D"
517 [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && check_dir "$VCSH_BASE/.gitignore.d"
518 [ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && check_dir "$VCSH_BASE/.gitattributes.d"
519
520 verbose "$VCSH_COMMAND begin"
521 VCSH_COMMAND=$(echo "$VCSH_COMMAND" | sed 's/-/_/g'); export VCSH_COMMAND
522 hook pre-command
523 $VCSH_COMMAND "$@"
524 hook post-command
525 verbose "$VCSH_COMMAND end, exiting"
526 exit $VCSH_COMMAND_RETURN_CODE