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b585f5c53ee2e848cfa02477072f8180ca7c4dd5
[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>, 2011-2013
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 "$VCSH_DEBUG" ] && set -vx
17
18 basename() {
19         # Implemented in shell to avoid spawning another process
20         local file
21         file="${1%/}"
22         file="${file##*/}"
23         [ -z "$2" ] || file="${file%$2}"
24         echo "$file"
25 }
26
27 SELF=$(basename $0)
28 VERSION='1.20130909.git-HEAD'
29
30 fatal() {
31         echo "$SELF: fatal: $1" >&2
32         exit $2
33 }
34
35 # We need to run getops as soon as possible so we catch -d and other
36 # options that will modify our behaviour.
37 # Commands are handled at the end of this script.
38 while getopts "c:dv" flag; do
39         if [ "$1" = '-d' ] || [ "$1" = '--debug' ]; then
40                 set -vx
41                 VCSH_DEBUG=1
42                 echo "debug mode on"
43                 echo "$SELF $VERSION"
44         elif [ "$1" = '-v' ];then
45                 VCSH_VERBOSE=1
46                 echo "verbose mode on"
47                 echo "$SELF $VERSION"
48         elif [ "$1" = '-c' ];then
49                 VCSH_OPTION_CONFIG=$OPTARG
50         fi
51         shift 1
52 done
53
54 source_all() {
55         # Source file even if it's in $PWD and does not have any slashes in it
56         case "$1" in
57                 */*) . "$1";;
58                 *)   . "$PWD/$1";;
59         esac;
60 }
61
62
63 # Read configuration and set defaults if anything's not set
64 [ -n "$VCSH_DEBUG" ]                  && set -vx
65 [ -z "$XDG_CONFIG_HOME" ]             && XDG_CONFIG_HOME="$HOME/.config"
66
67 # Read configuration files if there are any
68 [ -r "/etc/vcsh/config" ]             && . "/etc/vcsh/config"
69 [ -r "$XDG_CONFIG_HOME/vcsh/config" ] && . "$XDG_CONFIG_HOME/vcsh/config"
70 if [ -n "$VCSH_OPTION_CONFIG" ]; then
71         # Source $VCSH_OPTION_CONFIG if it can be read and is in $PWD of $PATH
72         if [ -r "$VCSH_OPTION_CONFIG" ]; then
73                 source_all "$VCSH_OPTION_CONFIG"
74         else
75                 fatal "Can not read configuration file '$VCSH_OPTION_CONFIG'" 1
76         fi
77 fi
78 [ -n "$VCSH_DEBUG" ]                  && set -vx
79
80 # Read defaults
81 [ -z "$VCSH_REPO_D" ]                 && VCSH_REPO_D="$XDG_CONFIG_HOME/vcsh/repo.d"
82 [ -z "$VCSH_HOOK_D" ]                 && VCSH_HOOK_D="$XDG_CONFIG_HOME/vcsh/hooks-enabled"
83 [ -z "$VCSH_BASE" ]                   && VCSH_BASE="$HOME"
84 [ -z "$VCSH_GITIGNORE" ]              && VCSH_GITIGNORE='exact'
85 [ -z "$VCSH_WORKTREE" ]               && VCSH_WORKTREE='absolute'
86
87 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
88         fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
89 fi
90
91 if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ] && [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
92         fatal "'\$VCSH_WORKTREE' must equal 'absolute', or 'relative'" 1
93 fi
94
95
96 help() {
97         echo "usage: $SELF <options> <command>
98
99    options:
100    -c <file>            Source file
101    -d                   Enable debug mode
102    -v                   Enable verbose mode
103
104    commands:
105    clone <remote> \\
106          [<repo>]       Clone from an existing repository
107    commit               Commit in all repositories
108    delete <repo>        Delete an existing repository
109    enter <repo>         Enter repository; spawn new instance of \$SHELL
110    help                 Display this help text
111    init <repo>          Initialize a new repository
112    list                 List all repositories
113    list-tracked         List all files tracked by vcsh
114    list-tracked-by \\
115         <repo>          List files tracked by a repository
116    pull                 Pull from all vcsh remotes
117    push                 Push to vcsh remotes
118    rename <repo> \\
119           <newname>     Rename repository
120    run <repo> \\
121        <command>        Use this repository
122    status [<repo>]      Show statuses of all/one vcsh repositories
123    upgrade <repo>       Upgrade repository to currently recommended settings
124    version              Print version information
125    which <substring>    Find substring in name of any tracked file
126    write-gitignore \\
127    <repo>               Write .gitignore.d/<repo> via git ls-files
128
129    <repo> <git command> Shortcut to run git commands directly
130    <repo>               Shortcut to enter repository" >&2
131 }
132
133 debug() {
134         [ -n "$VCSH_DEBUG" ] && echo "$SELF: debug: $@"
135 }
136
137 verbose() {
138         if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
139 }
140
141 error() {
142         echo "$SELF: error: $1" >&2
143 }
144
145 info() {
146         echo "$SELF: info: $1"
147 }
148
149 clone() {
150         hook pre-clone
151         init
152         git remote add origin "$GIT_REMOTE"
153         git config branch.master.remote origin
154         git config branch.master.merge  refs/heads/master
155         if [ $(git ls-remote origin master 2> /dev/null | wc -l ) -lt 1 ]; then
156                 info "remote is empty, not merging anything"
157                 exit
158         fi
159         git fetch
160         for object in $(git ls-tree -r origin/master | awk '{print $4}'); do
161                 [ -e "$object" ] &&
162                         error "'$object' exists." &&
163                         VCSH_CONFLICT=1
164         done
165         [ "$VCSH_CONFLICT" = '1' ] &&
166                 fatal "will stop after fetching and not try to merge!
167   Once this situation has been resolved, run 'vcsh run $VCSH_REPO_NAME git pull' to finish cloning." 17
168         git merge origin/master
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                 export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
179                 use
180                 git commit --untracked-files=no --quiet
181                 echo
182         done
183         hook post-commit
184 }
185
186 delete() {
187         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
188         use
189         info "This operation WILL DESTROY DATA!"
190         files=$(git ls-files)
191         echo "These files will be deleted:
192
193 $files
194
195 AGAIN, THIS WILL DELETE YOUR DATA!
196 To continue, type 'Yes, do as I say'"
197         read answer
198         [ "x$answer" = 'xYes, do as I say' ] || exit 16
199         for file in $files; do
200                 rm -f $file || info "could not delete '$file', continuing with deletion"
201         done
202         rm -rf "$GIT_DIR" || error "could not delete '$GIT_DIR'"
203 }
204
205 enter() {
206         hook pre-enter
207         use
208         $SHELL
209         hook post-enter
210 }
211
212 git_dir_exists() {
213         [ -d "$GIT_DIR" ] || fatal "no repository found for '$VCSH_REPO_NAME'" 12
214 }
215
216 hook() {
217         for hook in $VCSH_HOOK_D/$1* $VCSH_HOOK_D/$VCSH_REPO_NAME.$1*; do
218                 [ -x "$hook" ] || continue
219                 verbose "executing '$hook'"
220                 "$hook"
221         done
222 }
223
224 init() {
225         hook pre-init
226         [ ! -e "$GIT_DIR" ] || fatal "'$GIT_DIR' exists" 10
227         mkdir -p "$VCSH_BASE" || fatal "could not create '$VCSH_BASE'" 50
228         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
229         git init
230         upgrade
231         hook post-init
232 }
233
234 list() {
235         for repo in "$VCSH_REPO_D"/*.git; do
236                 [ -d "$repo" ] && [ -r "$repo" ] && echo $(basename "$repo" .git)
237         done
238 }
239
240 get_files() {
241         export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
242         git ls-files
243 }
244
245 list_tracked() {
246         for VCSH_REPO_NAME in $(list); do
247                 get_files
248         done | sort -u
249 }
250
251 list_tracked_by() {
252         use
253         git ls-files | sort -u
254 }
255
256 pull() {
257         hook pre-pull
258         for VCSH_REPO_NAME in $(list); do
259                 echo -n "$VCSH_REPO_NAME: "
260                 export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
261                 use
262                 git pull
263                 echo
264         done
265         hook post-pull
266 }
267
268 push() {
269         hook pre-push
270         for VCSH_REPO_NAME in $(list); do
271                 echo -n "$VCSH_REPO_NAME: "
272                 export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
273                 use
274                 git push
275                 echo
276         done
277         hook post-push
278 }
279
280 retire() {
281         unset VCSH_DIRECTORY
282 }
283
284 rename() {
285         git_dir_exists
286         [ -d "$GIT_DIR_NEW" ] && fatal "'$GIT_DIR_NEW' exists" 54
287         mv -f "$GIT_DIR" "$GIT_DIR_NEW" || fatal "Could not mv '$GIT_DIR' '$GIT_DIR_NEW'" 52
288
289         # Now that the repository has been renamed, we need to fix up its configuration
290         # Overwrite old name..
291         GIT_DIR="$GIT_DIR_NEW"
292         VCSH_REPO_NAME="$VCSH_REPO_NAME_NEW"
293         # ..and clobber all old configuration
294         upgrade
295 }
296
297 run() {
298         hook pre-run
299         use
300         "$@"
301         hook post-run
302 }
303
304 status() {
305         if [ ! "x$VCSH_REPO_NAME" = "x" ]; then
306                 export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
307                 use
308                 git status --short --untracked-files='no'
309         else
310                 for VCSH_REPO_NAME in $(list); do
311                         echo "$VCSH_REPO_NAME:"
312                         export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
313                         use
314                         git status --short --untracked-files='no'
315                         echo
316                 done
317         fi
318 }
319
320 upgrade() {
321         hook pre-upgrade
322         # fake-bare repositories are not bare, actually. Set this to false
323         # because otherwise Git complains "fatal: core.bare and core.worktree
324         # do not make sense"
325         git config core.bare false
326         # core.worktree may be absolute or relative to $GIT_DIR, depending on
327         # user preference
328         if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ]; then
329                 git config core.worktree $(cd $GIT_DIR && GIT_WORK_TREE="$VCSH_BASE" git rev-parse --show-cdup)
330         elif [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
331                 git config core.worktree "$VCSH_BASE"
332         fi
333         [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
334         git config vcsh.vcsh         'true'
335         use
336         [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME"
337         hook post-upgrade
338 }
339
340 use() {
341         git_dir_exists
342         export VCSH_DIRECTORY="$VCSH_REPO_NAME"
343 }
344
345 which() {
346         for VCSH_REPO_NAME in $(list); do
347                 for VCSH_FILE in $(get_files); do
348                         echo $VCSH_FILE | grep -q "$VCSH_COMMAND_PARAMETER" && echo "$VCSH_REPO_NAME: $VCSH_FILE"
349                 done
350         done | sort -u
351 }
352
353 write_gitignore() {
354         # Don't do anything if the user does not want to write gitignore
355         if [ "x$VCSH_GITIGNORE" = 'xnone' ]; then
356                 info "Not writing gitignore as '\$VCSH_GITIGNORE' is set to 'none'"
357                 exit
358         fi
359
360         use
361         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
362         gitignores=$(for file in $(git ls-files); do
363                 while true; do
364                         echo $file; new="${file%/*}"
365                         [ "$file" = "$new" ] && break
366                         file="$new"
367                 done;
368         done | sort -u)
369
370         # Contrary to GNU mktemp, mktemp on BSD/OSX requires a template for temp files
371         # Use the template GNU mktemo defaults to
372         tempfile=$(mktemp tmp.XXXXXXXXXX) || fatal "could not create tempfile" 51
373
374         echo '*' > "$tempfile" || fatal "could not write to '$tempfile'" 57
375         for gitignore in $gitignores; do
376                 echo "$gitignore" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57
377                 if [ "x$VCSH_GITIGNORE" = 'xrecursive' ] && [ -d "$gitignore" ]; then
378                         { echo "$gitignore/*" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
379                 fi
380         done
381         if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
382                 rm -f "$tempfile" || error "could not delete '$tempfile'"
383                 exit
384         fi
385         if [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ]; then
386                 info "'$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' differs from new data, moving it to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'"
387                 mv -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak" ||
388                         fatal "could not move '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'" 53
389         fi
390         mv -f "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ||
391                 fatal "could not move '$tempfile' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME'" 53
392 }
393
394 debug `git version`
395
396 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
397         fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
398 fi
399
400 export VCSH_COMMAND="$1"
401
402 [ "$VCSH_COMMAND" = 'clon' ]   || [ "$VCSH_COMMAND" = 'clo' ]   || [ "$VCSH_COMMAND" = 'cl' ]                                                                && VCSH_COMMAND='clone'
403 [ "$VCSH_COMMAND" = 'commi' ]  || [ "$VCSH_COMMAND" = 'comm' ]  || [ "$VCSH_COMMAND" = 'com' ]  || [ "$VCSH_COMMAND" = 'co' ]                                && VCSH_COMMAND='commit'
404 [ "$VCSH_COMMAND" = 'delet' ]  || [ "$VCSH_COMMAND" = 'dele' ]  || [ "$VCSH_COMMAND" = 'del' ]  || [ "$VCSH_COMMAND" = 'de' ]                                && VCSH_COMMAND='delete'
405 [ "$VCSH_COMMAND" = 'ente' ]   || [ "$VCSH_COMMAND" = 'ent' ]   || [ "$VCSH_COMMAND" = 'en' ]                                                                && VCSH_COMMAND='enter'
406 [ "$VCSH_COMMAND" = 'hel' ]    || [ "$VCSH_COMMAND" = 'he' ]                                                                                                 && VCSH_COMMAND='help'
407 [ "$VCSH_COMMAND" = 'ini' ]    || [ "$VCSH_COMMAND" = 'in' ]                                                                                                 && VCSH_COMMAND='init'
408 [ "$VCSH_COMMAND" = 'pul' ]                                                                                                                                  && VCSH_COMMAND='pull'
409 [ "$VCSH_COMMAND" = 'pus' ]                                                                                                                                  && VCSH_COMMAND='push'
410 [ "$VCSH_COMMAND" = 'renam' ]  || [ "$VCSH_COMMAND" = 'rena' ]  || [ "$VCSH_COMMAND" = 'ren' ]  || [ "$VCSH_COMMAND" = 're' ]                                && VCSH_COMMAND='rename'
411 [ "$VCSH_COMMAND" = 'ru' ]                                                                                                                                   && VCSH_COMMAND='run'
412 [ "$VCSH_COMMAND" = 'statu' ]  || [ "$VCSH_COMMAND" = 'stat' ]  || [ "$VCSH_COMMAND" = 'sta' ]  || [ "$VCSH_COMMAND" = 'st' ]                                && VCSH_COMMAND='status'
413 [ "$VCSH_COMMAND" = 'upgrad' ] || [ "$VCSH_COMMAND" = 'upgra' ] || [ "$VCSH_COMMAND" = 'upgr' ] || [ "$VCSH_COMMAND" = 'upg' ]                               && VCSH_COMMAND='upgrade'
414 [ "$VCSH_COMMAND" = 'versio' ] || [ "$VCSH_COMMAND" = 'versi' ] || [ "$VCSH_COMMAND" = 'vers' ] || [ "$VCSH_COMMAND" = 'ver' ] || [ "$VCSH_COMMAND" = 've' ] && VCSH_COMMAND='version'
415 [ "$VCSH_COMMAND" = 'whic' ]   || [ "$VCSH_COMMAND" = 'whi' ]   || [ "$VCSH_COMMAND" = 'wh' ]                                                                && VCSH_COMMAND='which'
416 [ "$VCSH_COMMAND" = 'write' ]  || [ "$VCSH_COMMAND" = 'writ' ]  || [ "$VCSH_COMMAND" = 'wri' ]  || [ "$VCSH_COMMAND" = 'wr' ]                                && VCSH_COMMAND='write-gitignore'
417
418
419 if [ "$VCSH_COMMAND" = 'clone' ]; then
420         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a remote" 1
421         GIT_REMOTE="$2"
422         [ -n "$3" ] && VCSH_REPO_NAME="$3" || VCSH_REPO_NAME=$(basename "$GIT_REMOTE" .git)
423         [ -z "$VCSH_REPO_NAME" ] && fatal "$VCSH_COMMAND: could not determine repository name" 1
424         export VCSH_REPO_NAME
425         export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
426 elif [ "$VCSH_COMMAND" = 'version' ]; then
427         echo "$SELF $VERSION"
428         git version
429         exit
430 elif [ "$VCSH_COMMAND" = 'which' ]; then
431         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a filename" 1
432         [ -n "$3" ] && fatal "$VCSH_COMMAND: too many parameters" 1
433         export VCSH_COMMAND_PARAMETER="$2"
434 elif [ "$VCSH_COMMAND" = 'delete' ]           ||
435      [ "$VCSH_COMMAND" = 'enter' ]            ||
436      [ "$VCSH_COMMAND" = 'init' ]             ||
437      [ "$VCSH_COMMAND" = 'list-tracked-by' ]  ||
438      [ "$VCSH_COMMAND" = 'rename' ]           ||
439      [ "$VCSH_COMMAND" = 'run' ]              ||
440      [ "$VCSH_COMMAND" = 'upgrade' ]          ||
441      [ "$VCSH_COMMAND" = 'write-gitignore' ]; then
442         [ -z $2 ]                                 && fatal "$VCSH_COMMAND: please specify repository to work on" 1
443         [ "$VCSH_COMMAND" = 'rename' -a -z "$3" ] && fatal "$VCSH_COMMAND: please specify a target name" 1
444         [ "$VCSH_COMMAND" = 'run'    -a -z "$3" ] && fatal "$VCSH_COMMAND: please specify a command" 1
445         export VCSH_REPO_NAME="$2"
446         export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
447         [ "$VCSH_COMMAND" = 'rename' ] && { export VCSH_REPO_NAME_NEW="$3";
448                                             export GIT_DIR_NEW="$VCSH_REPO_D/$VCSH_REPO_NAME_NEW.git"; }
449         [ "$VCSH_COMMAND" = 'run' ]    && shift 2
450 elif [ "$VCSH_COMMAND" = 'commit' ] ||
451      [ "$VCSH_COMMAND" = 'list' ] ||
452      [ "$VCSH_COMMAND" = 'list-tracked' ] ||
453      [ "$VCSH_COMMAND" = 'pull' ] ||
454      [ "$VCSH_COMMAND" = 'push' ]; then
455         :
456 elif [ "$VCSH_COMMAND" = 'status' ]; then
457         export VCSH_REPO_NAME="$2"
458 elif [ -n "$2" ]; then
459         export VCSH_COMMAND='run'
460         export VCSH_REPO_NAME="$1"
461         export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
462         [ -d $GIT_DIR ] || { help; exit 1; }
463         shift 1
464         set -- "git" "$@"
465 elif [ -n "$VCSH_COMMAND" ]; then
466         export VCSH_COMMAND='enter'
467         export VCSH_REPO_NAME="$1"
468         export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
469         [ -d $GIT_DIR ] || { help; exit 1; }
470 else
471         # $1 is empty, or 'help'
472         help && exit
473 fi
474
475 # Did we receive a directory instead of a name?
476 # Mangle the input to fit normal operation.
477 if echo $VCSH_REPO_NAME | grep -q '/'; then
478         export GIT_DIR=$VCSH_REPO_NAME
479         export VCSH_REPO_NAME=$(basename "$VCSH_REPO_NAME" .git)
480 fi
481
482 check_dir() {
483         check_directory="$1"
484         if [ ! -d "$check_directory" ]; then
485                 if [ -e "$check_directory" ]; then
486                         fatal "'$check_directory' exists but is not a directory" 13
487                 else
488                         verbose "attempting to create '$check_directory'"
489                         mkdir -p "$check_directory" || fatal "could not create '$check_directory'" 50
490                 fi
491         fi
492 }
493
494 check_dir "$VCSH_REPO_D"
495 [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && check_dir "$VCSH_BASE/.gitignore.d"
496
497 verbose "$VCSH_COMMAND begin"
498 export VCSH_COMMAND=$(echo $VCSH_COMMAND | sed 's/-/_/g')
499 hook pre-command
500 $VCSH_COMMAND "$@"
501 hook post-command
502 verbose "$VCSH_COMMAND end, exiting"