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Merge pull request #228 from ttuegel/bugfix/shared
[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>, 2011-2015
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 "$VCSH_DEBUG" ] && set -vx
17
18
19 # If '.git-HEAD' is appended to the version, you are seeing an unreleased
20 # version of vcsh; the master branch is supposed to be clean at all times
21 # so you can most likely just use it nonetheless
22 VERSION='1.20141026'
23 SELF=$(basename $0)
24
25 # Ensure all files created are accessible only to the current user.
26 umask 0077
27
28 fatal() {
29         echo "$SELF: fatal: $1" >&2
30         [ -z $2 ] && exit 1
31         exit $2
32 }
33
34 # We need to run getops as soon as possible so we catch -d and other
35 # options that will modify our behaviour.
36 # Commands are handled at the end of this script.
37 while getopts "c:dv" flag; do
38         if [ x"$1" = x'-d' ] || [ x"$1" = x'--debug' ]; then
39                 set -vx
40                 VCSH_DEBUG=1
41                 echo "debug mode on"
42                 echo "$SELF $VERSION"
43         elif [ x"$1" = x'-v' ]; then
44                 VCSH_VERBOSE=1
45                 echo "verbose mode on"
46                 echo "$SELF $VERSION"
47         elif [ x"$1" = x'-c' ]; then
48                 VCSH_OPTION_CONFIG=$OPTARG
49         fi
50         shift 1
51 done
52
53 source_all() {
54         # Source file even if it's in $PWD and does not have any slashes in it
55         case $1 in
56                 */*) . "$1";;
57                 *)   . "$PWD/$1";;
58         esac;
59 }
60
61
62 # Read configuration and set defaults if anything's not set
63 [ -n "$VCSH_DEBUG" ]                  && set -vx
64 : ${XDG_CONFIG_HOME:="$HOME/.config"}
65
66 # Read configuration files if there are any
67 [ -r "/etc/vcsh/config" ]             && . "/etc/vcsh/config"
68 [ -r "$XDG_CONFIG_HOME/vcsh/config" ] && . "$XDG_CONFIG_HOME/vcsh/config"
69 if [ -n "$VCSH_OPTION_CONFIG" ]; then
70         # Source $VCSH_OPTION_CONFIG if it can be read and is in $PWD of $PATH
71         if [ -r "$VCSH_OPTION_CONFIG" ]; then
72                 source_all "$VCSH_OPTION_CONFIG"
73         else
74                 fatal "Can not read configuration file '$VCSH_OPTION_CONFIG'" 1
75         fi
76 fi
77 [ -n "$VCSH_DEBUG" ]                  && set -vx
78
79 # Read defaults
80 : ${VCSH_REPO_D:="$XDG_CONFIG_HOME/vcsh/repo.d"}
81 : ${VCSH_HOOK_D:="$XDG_CONFIG_HOME/vcsh/hooks-enabled"}
82 : ${VCSH_OVERLAY_D:="$XDG_CONFIG_HOME/vcsh/overlays-enabled"}
83 : ${VCSH_BASE:="$HOME"}
84 : ${VCSH_GITIGNORE:=exact}
85 : ${VCSH_GITATTRIBUTES:=none}
86 : ${VCSH_WORKTREE:=absolute}
87
88 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
89         fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
90 fi
91
92 if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ] && [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
93         fatal "'\$VCSH_WORKTREE' must equal 'absolute', or 'relative'" 1
94 fi
95
96
97 help() {
98         echo "usage: $SELF <options> <command>
99
100    options:
101    -c <file>            Source file
102    -d                   Enable debug mode
103    -v                   Enable verbose mode
104
105    commands:
106    clone [-b <branch>] \\
107          <remote> \\
108          [<repo>]       Clone from an existing repository
109    commit               Commit in all repositories
110    delete <repo>        Delete an existing repository
111    enter <repo>         Enter repository; spawn new instance of \$SHELL
112                         with \$GIT_DIR set.
113    foreach [<-g>]
114      <git command>      Execute a command for every repository
115    help                 Display this help text
116    init <repo>          Initialize a new repository
117    list                 List all repositories
118    list-tracked \\
119         [<repo>]        List all files tracked all or one repositories
120    list-untracked \\
121         [<-a>] [<-r>]
122         [<repo>]        List all files not tracked by all or one repositories
123    pull                 Pull from all vcsh remotes
124    push                 Push to vcsh remotes
125    rename <repo> \\
126           <newname>     Rename repository
127    run <repo> \\
128        <command>        Use this repository
129    status \\
130      [--terse] [<repo>] Show statuses of all/one vcsh repositories
131    upgrade <repo>       Upgrade repository to currently recommended settings
132    version              Print version information
133    which <substring>    Find substring in name of any tracked file
134    write-gitignore \\
135    <repo>               Write .gitignore.d/<repo> via git ls-files
136
137    <repo> <git command> Shortcut to run git commands directly
138    <repo>               Shortcut to enter repository" >&2
139 }
140
141 debug() {
142         [ -n "$VCSH_DEBUG" ] && echo "$SELF: debug: $@"
143 }
144
145 verbose() {
146         if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
147 }
148
149 error() {
150         echo "$SELF: error: $1" >&2
151 }
152
153 info() {
154         echo "$SELF: info: $1"
155 }
156
157 clone() {
158         hook pre-clone
159         init
160         git remote add origin "$GIT_REMOTE"
161         git checkout -b "$VCSH_BRANCH" || return $?
162         git config branch."$VCSH_BRANCH".remote origin
163         git config branch."$VCSH_BRANCH".merge  refs/heads/"$VCSH_BRANCH"
164         if [ $(git ls-remote origin "$VCSH_BRANCH" 2> /dev/null | wc -l ) -lt 1 ]; then
165                 info "remote is empty, not merging anything.
166   You should add files to your new repository."
167                 exit
168         fi
169         GIT_VERSION_MAJOR=$(git --version | sed -n 's/.* \([0-9]\)\..*/\1/p' )
170         if [ 1 -lt "$GIT_VERSION_MAJOR" ];then
171                 git fetch origin "$VCSH_BRANCH"
172         else
173                 git fetch origin
174         fi
175         hook pre-merge
176         git ls-tree -r --name-only origin/"$VCSH_BRANCH" | (while read object; do
177                 [ -e "$object" ] &&
178                         error "'$object' exists." &&
179                         VCSH_CONFLICT=1
180         done
181         [ x"$VCSH_CONFLICT" = x'1' ]) &&
182                 fatal "will stop after fetching and not try to merge!
183   Once this situation has been resolved, run 'vcsh $VCSH_REPO_NAME pull' to finish cloning." 17
184         git -c merge.ff=true merge origin/"$VCSH_BRANCH"
185         hook post-merge
186         hook post-clone
187         retire
188         hook post-clone-retired
189 }
190
191 commit() {
192         hook pre-commit
193         for VCSH_REPO_NAME in $(list); do
194                 echo "$VCSH_REPO_NAME: "
195                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
196                 use
197                 git commit --untracked-files=no --quiet $@
198                 VCSH_COMMAND_RETURN_CODE=$?
199                 echo
200         done
201         hook post-commit
202 }
203
204 delete() {
205         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
206         use
207         info "This operation WILL DESTROY DATA!"
208         files=$(git ls-files)
209         echo "These files will be deleted:
210
211 $files
212
213 AGAIN, THIS WILL DELETE YOUR DATA!
214 To continue, type 'Yes, do as I say'"
215         read answer
216         [ "x$answer" = 'xYes, do as I say' ] || exit 16
217         for file in $files; do
218                 rm -f $file || info "could not delete '$file', continuing with deletion"
219         done
220         rm -rf "$GIT_DIR" || error "could not delete '$GIT_DIR'"
221 }
222
223 enter() {
224         hook pre-enter
225         use
226         $SHELL
227         hook post-enter
228 }
229
230 foreach() {
231         hook pre-foreach
232
233         # We default to prefixing `git` to all commands passed to foreach, but
234         # allow running in general context with -g
235         command_prefix=git
236         while getopts "g" flag; do
237                 if [ x"$1" = x'-g' ]; then
238                         unset command_prefix
239                 fi
240                 shift 1
241         done
242         for VCSH_REPO_NAME in $(list); do
243                 echo "$VCSH_REPO_NAME:"
244                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
245                 use
246                 $command_prefix "$@"
247         done
248         hook post-foreach
249 }
250
251 git_dir_exists() {
252         [ -d "$GIT_DIR" ] || fatal "no repository found for '$VCSH_REPO_NAME'" 12
253 }
254
255 hook() {
256         for hook in "$VCSH_HOOK_D/$1"* "$VCSH_HOOK_D/$VCSH_REPO_NAME.$1"*; do
257                 [ -x "$hook" ] || continue
258                 verbose "executing '$hook'"
259                 "$hook"
260         done
261 }
262
263 init() {
264         hook pre-init
265         [ ! -e "$GIT_DIR" ] || fatal "'$GIT_DIR' exists" 10
266         mkdir -p "$VCSH_BASE" || fatal "could not create '$VCSH_BASE'" 50
267         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
268         git init --shared=false
269         upgrade
270         hook post-init
271 }
272
273 list() {
274         for repo in "$VCSH_REPO_D"/*.git; do
275                 [ -d "$repo" ] && [ -r "$repo" ] && echo "$(basename "$repo" .git)"
276         done
277 }
278
279 get_files() {
280         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
281         git ls-files
282 }
283
284 list_tracked() {
285         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
286         if [ -n "$VCSH_REPO_NAME" ]; then
287                 get_files | list_tracked_helper
288         else
289                 for VCSH_REPO_NAME in $(list); do
290                         get_files
291                 done | list_tracked_helper
292         fi
293 }
294
295 list_tracked_helper() {
296         sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | sed 's/[,\&]/\\&/g')," | sort -u
297 }
298
299 list_tracked_by() {
300         list_tracked '' $2
301 }
302
303 list_untracked() {
304         command -v 'comm' >/dev/null 2>&1 || fatal "Could not find 'comm'"
305
306         temp_file_others=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
307         temp_file_untracked=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
308         temp_file_untracked_copy=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
309
310         # Hack in support for `vcsh list-untracked -r`...
311         exclude_standard_opt='--exclude-standard'
312         directory_opt="--directory"
313         shift 1
314         while getopts "ar" flag; do
315                 if [ x"$1" = x'-a' ]; then
316                         unset exclude_standard_opt
317                 elif [ x"$1" = x'-r' ]; then
318                         unset directory_opt
319                 fi
320                 shift 1
321         done
322         # ...and parse for a potential parameter afterwards. As we shifted things out of $* in during getops, we need to look at $1
323         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
324
325         if [ -n "$VCSH_REPO_NAME" ]; then
326                 list_untracked_helper $VCSH_REPO_NAME
327         else
328                 for VCSH_REPO_NAME in $(list); do
329                         list_untracked_helper $VCSH_REPO_NAME
330                 done
331         fi
332         cat $temp_file_untracked
333
334         unset directory_opt directory_component
335         rm -f $temp_file_others $temp_file_untracked $temp_file_untracked_copy || fatal 'Could not delete temp files'
336 }
337
338 list_untracked_helper() {
339         export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
340         git ls-files --others $exclude_standard_opt "$directory_opt" | (
341                 while read line; do
342                         echo "$line"
343                         directory_component=${line%%/*}
344                         [ -d "$directory_component" ] && printf '%s/\n' "$directory_component"
345                 done
346                 ) | sort -u > $temp_file_others
347         if [ -z "$ran_once" ]; then
348                 ran_once=1
349                 cp $temp_file_others $temp_file_untracked || fatal 'Could not copy temp file'
350         fi
351         cp $temp_file_untracked $temp_file_untracked_copy || fatal 'Could not copy temp file'
352         comm -12 $temp_file_others $temp_file_untracked_copy > $temp_file_untracked
353 }
354
355 pull() {
356         hook pre-pull
357         for VCSH_REPO_NAME in $(list); do
358                 printf '%s: ' "$VCSH_REPO_NAME"
359                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
360                 use
361                 git pull
362                 VCSH_COMMAND_RETURN_CODE=$?
363                 echo
364         done
365         hook post-pull
366 }
367
368 push() {
369         hook pre-push
370         for VCSH_REPO_NAME in $(list); do
371                 printf '%s: ' "$VCSH_REPO_NAME"
372                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
373                 use
374                 git push
375                 VCSH_COMMAND_RETURN_CODE=$?
376                 echo
377         done
378         hook post-push
379 }
380
381 retire() {
382         unset VCSH_DIRECTORY
383 }
384
385 rename() {
386         git_dir_exists
387         [ -d "$GIT_DIR_NEW" ] && fatal "'$GIT_DIR_NEW' exists" 54
388         mv -f "$GIT_DIR" "$GIT_DIR_NEW" || fatal "Could not mv '$GIT_DIR' '$GIT_DIR_NEW'" 52
389
390         # Now that the repository has been renamed, we need to fix up its configuration
391         # Overwrite old name..
392         GIT_DIR=$GIT_DIR_NEW
393         VCSH_REPO_NAME=$VCSH_REPO_NAME_NEW
394         # ..and clobber all old configuration
395         upgrade
396 }
397
398 run() {
399         hook pre-run
400         use
401         "$@"
402         VCSH_COMMAND_RETURN_CODE=$?
403         hook post-run
404 }
405
406 status() {
407         if [ -t 1 ]; then
408                 COLORING="-c color.status=always"
409         fi
410         if [ -n "$VCSH_REPO_NAME" ]; then
411                 status_helper $VCSH_REPO_NAME
412         else
413                 for VCSH_REPO_NAME in $(list); do
414                         STATUS=$(status_helper $VCSH_REPO_NAME "$COLORING")
415                         [ -n "$STATUS" -o -z "$VCSH_STATUS_TERSE" ] && echo "$VCSH_REPO_NAME:"
416                         [ -n "$STATUS" ]            && echo "$STATUS"
417                         [ -z "$VCSH_STATUS_TERSE" ] && echo
418                 done
419         fi
420 }
421
422 status_helper() {
423         GIT_DIR=$VCSH_REPO_D/$1.git; export GIT_DIR
424         VCSH_GIT_OPTIONS=$2
425         use
426         remote_tracking_branch=$(git rev-parse --abbrev-ref --symbolic-full-name @{u} 2> /dev/null) && {
427                 commits_behind=$(git log ..${remote_tracking_branch} --oneline | wc -l)
428                 commits_ahead=$(git log ${remote_tracking_branch}.. --oneline | wc -l)
429                 [ ${commits_behind} -ne 0 ] && echo "Behind $remote_tracking_branch by $commits_behind commits"
430                 [ ${commits_ahead} -ne 0 ] && echo "Ahead of $remote_tracking_branch by $commits_ahead commits"
431         }
432         git ${VCSH_GIT_OPTIONS} status --short --untracked-files='no'
433         VCSH_COMMAND_RETURN_CODE=$?
434 }
435
436 upgrade() {
437         hook pre-upgrade
438         # fake-bare repositories are not bare, actually. Set this to false
439         # because otherwise Git complains "fatal: core.bare and core.worktree
440         # do not make sense"
441         git config core.bare false
442         # core.worktree may be absolute or relative to $GIT_DIR, depending on
443         # user preference
444         if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ]; then
445                 git config core.worktree "$(cd "$GIT_DIR" && GIT_WORK_TREE=$VCSH_BASE git rev-parse --show-cdup)"
446         elif [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
447                 git config core.worktree "$VCSH_BASE"
448         fi
449         [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
450         [ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && git config core.attributesfile ".gitattributes.d/$VCSH_REPO_NAME"
451         git config vcsh.vcsh 'true'
452         use
453         [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME"
454         [ -e "$VCSH_BASE/.gitattributes.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitattributes.d/$VCSH_REPO_NAME"
455         hook post-upgrade
456 }
457
458 use() {
459         git_dir_exists
460         VCSH_DIRECTORY=$VCSH_REPO_NAME; export VCSH_DIRECTORY
461 }
462
463 which() {
464         output=$(for VCSH_REPO_NAME in $(list); do
465                 get_files | grep -- "$VCSH_COMMAND_PARAMETER" | sed "s/^/$VCSH_REPO_NAME: /"
466         done | sort -u)
467         if [ -z "$output" ]; then
468                 fatal "'$VCSH_COMMAND_PARAMETER' does not exist" 1
469         else
470                 echo "$output"
471         fi
472 }
473
474 write_gitignore() {
475         # Don't do anything if the user does not want to write gitignore
476         if [ "x$VCSH_GITIGNORE" = 'xnone' ]; then
477                 info "Not writing gitignore as '\$VCSH_GITIGNORE' is set to 'none'"
478                 exit
479         fi
480
481         use
482         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
483         local GIT_VERSION="$(git --version)"
484         local GIT_VERSION_MAJOR=$(echo $GIT_VERSION | sed -n 's/.* \([0-9]\)\..*/\1/p')
485         local GIT_VERSION_MINOR=$(echo $GIT_VERSION | sed -n 's/.* \([0-9]\)\.\([0-9]\)\..*/\2/p')
486         OLDIFS=$IFS
487         IFS=$(printf '\n\t')
488         gitignores=$(for file in $(git ls-files); do
489                 if [ $GIT_VERSION_MAJOR -ge 2 -a $GIT_VERSION_MINOR -ge 7 ]; then
490                         echo "$file";
491                 else
492                         while true; do
493                                 echo "$file"; new=${file%/*}
494                                 [ x"$file" = x"$new" ] && break
495                                 file=$new
496                         done;
497                 fi
498         done | sort -u)
499
500         # Contrary to GNU mktemp, mktemp on BSD/OSX requires a template for temp files
501         # Using a template makes GNU mktemp default to $PWD and not #TMPDIR for tempfile location
502         # To make every OS happy, set full path explicitly
503         tempfile=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal "could not create tempfile: '${tempfile}'" 51
504
505         echo '*' > "$tempfile" || fatal "could not write to '$tempfile'" 57
506         for gitignore in $gitignores; do
507                 echo "$gitignore" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57
508                 if [ "x$VCSH_GITIGNORE" = 'xrecursive' ] && [ -d "$gitignore" ]; then
509                         { echo "$gitignore/*" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
510                 fi
511         done
512         IFS=$OLDIFS
513         if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
514                 rm -f "$tempfile" || error "could not delete '$tempfile'"
515                 exit
516         fi
517         if [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ]; then
518                 info "'$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' differs from new data, moving it to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'"
519                 mv -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak" ||
520                         fatal "could not move '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'" 53
521         fi
522         mv -f "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ||
523                 fatal "could not move '$tempfile' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME'" 53
524 }
525
526 debug $(git version)
527
528 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
529         fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
530 fi
531
532 VCSH_COMMAND=$1; export VCSH_COMMAND
533
534 case $VCSH_COMMAND in
535         clon|clo|cl) VCSH_COMMAND=clone;;
536         commi|comm|com|co) VCSH_COMMAND=commit;;
537         delet|dele|del|de) VCSH_COMMAND=delete;;
538         ente|ent|en) VCSH_COMMAND=enter;;
539         hel|he) VCSH_COMMAND=help;;
540         ini|in) VCSH_COMMAND=init;;
541         pul) VCSH_COMMAND=pull;;
542         pus) VCSH_COMMAND=push;;
543         renam|rena|ren|re) VCSH_COMMAND=rename;;
544         ru) VCSH_COMMAND=run;;
545         statu|stat|sta|st) VCSH_COMMAND=status;;
546         upgrad|upgra|upgr|up) VCSH_COMMAND=upgrade;;
547         versio|versi|vers|ver|ve) VCSH_COMMAND=version;;
548         which|whi|wh) VCSH_COMMAND=which;;
549         write|writ|wri|wr) VCSH_COMMAND=write-gitignore;;
550 esac    
551
552 if [ x"$VCSH_COMMAND" = x'clone' ]; then
553         VCSH_BRANCH=
554         if [ "$2" = -b ]; then
555                 VCSH_BRANCH=$3
556                 shift
557                 shift
558         fi
559         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a remote" 1
560         GIT_REMOTE="$2"
561         [ -n "$VCSH_BRANCH" ] || if [ "$3" = -b ]; then
562                 VCSH_BRANCH=$4
563                 shift
564                 shift
565         fi
566         if [ -n "$3" ]; then
567                 VCSH_REPO_NAME=$3
568                 [ -z "$VCSH_BRANCH" ] && [ "$4" = -b ] && VCSH_BRANCH=$5
569         else
570                 VCSH_REPO_NAME=$(basename "${GIT_REMOTE#*:}" .git)
571         fi
572         [ -z "$VCSH_REPO_NAME" ] && fatal "$VCSH_COMMAND: could not determine repository name" 1
573         export VCSH_REPO_NAME
574         [ -n "$VCSH_BRANCH" ] || VCSH_BRANCH=master
575         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
576 elif [ "$VCSH_COMMAND" = 'version' ]; then
577         echo "$SELF $VERSION"
578         git version
579         exit
580 elif [ x"$VCSH_COMMAND" = x'which' ]; then
581         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a filename" 1
582         [ -n "$3" ] && fatal "$VCSH_COMMAND: too many parameters" 1
583         VCSH_COMMAND_PARAMETER=$2; export VCSH_COMMAND_PARAMETER
584 elif [ x"$VCSH_COMMAND" = x'delete' ]           ||
585      [ x"$VCSH_COMMAND" = x'enter' ]            ||
586      [ x"$VCSH_COMMAND" = x'init' ]             ||
587      [ x"$VCSH_COMMAND" = x'list-tracked-by' ]  ||
588      [ x"$VCSH_COMMAND" = x'rename' ]           ||
589      [ x"$VCSH_COMMAND" = x'run' ]              ||
590      [ x"$VCSH_COMMAND" = x'upgrade' ]          ||
591      [ x"$VCSH_COMMAND" = x'write-gitignore' ]; then
592         [ -z "$2" ]                                     && fatal "$VCSH_COMMAND: please specify repository to work on" 1
593         [ x"$VCSH_COMMAND" = x'rename' ] && [ -z "$3" ] && fatal "$VCSH_COMMAND: please specify a target name" 1
594         [ x"$VCSH_COMMAND" = x'run'    ] && [ -z "$3" ] && fatal "$VCSH_COMMAND: please specify a command" 1
595         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
596         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
597         [ x"$VCSH_COMMAND" = x'rename' ] && { VCSH_REPO_NAME_NEW=$3; export VCSH_REPO_NAME_NEW;
598                                               GIT_DIR_NEW=$VCSH_REPO_D/$VCSH_REPO_NAME_NEW.git; export GIT_DIR_NEW; }
599         [ x"$VCSH_COMMAND" = x'run' ]    && shift 2
600 elif [ x"$VCSH_COMMAND" = x'foreach' ]; then
601         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a command" 1
602         shift 1
603 elif [ x"$VCSH_COMMAND" = x'commit' ] ||
604      [ x"$VCSH_COMMAND" = x'list'   ] ||
605      [ x"$VCSH_COMMAND" = x'list-tracked' ] ||
606      [ x"$VCSH_COMMAND" = x'list-untracked' ] ||
607      [ x"$VCSH_COMMAND" = x'pull'   ] ||
608      [ x"$VCSH_COMMAND" = x'push'   ]; then
609         :
610 elif [ x"$VCSH_COMMAND" = x'status' ]; then
611         if [ x"$2" = x'--terse' ]; then
612                 VCSH_STATUS_TERSE=1; export VCSH_STATUS_TERSE
613                 shift
614         fi
615         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
616 elif [ -n "$2" ]; then
617         VCSH_COMMAND='run'; export VCSH_COMMAND
618         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
619         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
620         [ -d "$GIT_DIR" ] || { help; exit 1; }
621         shift 1
622         set -- "git" "$@"
623 elif [ -n "$VCSH_COMMAND" ]; then
624         VCSH_COMMAND='enter'; export VCSH_COMMAND
625         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
626         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
627         [ -d "$GIT_DIR" ] || { help; exit 1; }
628 else
629         # $1 is empty, or 'help'
630         help && exit
631 fi
632
633 # Did we receive a directory instead of a name?
634 # Mangle the input to fit normal operation.
635 if echo "$VCSH_REPO_NAME" | grep -q '/'; then
636         GIT_DIR=$VCSH_REPO_NAME; export GIT_DIR
637         VCSH_REPO_NAME=$(basename "$VCSH_REPO_NAME" .git); export VCSH_REPO_NAME
638 fi
639
640 check_dir() {
641         check_directory="$1"
642         if [ ! -d "$check_directory" ]; then
643                 if [ -e "$check_directory" ]; then
644                         fatal "'$check_directory' exists but is not a directory" 13
645                 else
646                         verbose "attempting to create '$check_directory'"
647                         mkdir -p "$check_directory" || fatal "could not create '$check_directory'" 50
648                 fi
649         fi
650 }
651
652 check_dir "$VCSH_REPO_D"
653 [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && check_dir "$VCSH_BASE/.gitignore.d"
654 [ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && check_dir "$VCSH_BASE/.gitattributes.d"
655
656 verbose "$VCSH_COMMAND begin"
657 VCSH_COMMAND=$(echo "$VCSH_COMMAND" | sed 's/-/_/g'); export VCSH_COMMAND
658
659 # Source repo-specific configuration file
660 [ -r "$XDG_CONFIG_HOME/vcsh/config.d/$VCSH_REPO_NAME" ] && . "$XDG_CONFIG_HOME/vcsh/config.d/$VCSH_REPO_NAME"
661
662 # source overlay functions
663 for overlay in "$VCSH_OVERLAY_D/$VCSH_COMMAND"* "$VCSH_OVERLAY_D/$VCSH_REPO_NAME.$VCSH_COMMAND"*; do
664         [ -r "$overlay" ] || continue
665         info "sourcing '$overlay'"
666         . "$overlay"
667 done
668
669 hook pre-command
670 $VCSH_COMMAND "$@"
671 hook post-command
672 verbose "$VCSH_COMMAND end, exiting"
673 exit $VCSH_COMMAND_RETURN_CODE