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completion: Complete only external commands for 'run'.
[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         shift  # remove the "commit" command.
194         for VCSH_REPO_NAME in $(list); do
195                 echo "$VCSH_REPO_NAME: "
196                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
197                 use
198                 git commit --untracked-files=no --quiet "$@"
199                 VCSH_COMMAND_RETURN_CODE=$?
200                 echo
201         done
202         hook post-commit
203 }
204
205 delete() {
206         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
207         use
208         info "This operation WILL DESTROY DATA!"
209         files=$(git ls-files)
210         echo "These files will be deleted:
211
212 $files
213
214 AGAIN, THIS WILL DELETE YOUR DATA!
215 To continue, type 'Yes, do as I say'"
216         read answer
217         [ "x$answer" = 'xYes, do as I say' ] || exit 16
218         for file in $files; do
219                 rm -f $file || info "could not delete '$file', continuing with deletion"
220         done
221         rm -rf "$GIT_DIR" || error "could not delete '$GIT_DIR'"
222 }
223
224 enter() {
225         hook pre-enter
226         use
227         $SHELL
228         hook post-enter
229 }
230
231 foreach() {
232         hook pre-foreach
233
234         # We default to prefixing `git` to all commands passed to foreach, but
235         # allow running in general context with -g
236         command_prefix=git
237         while getopts "g" flag; do
238                 if [ x"$1" = x'-g' ]; then
239                         unset command_prefix
240                 fi
241                 shift 1
242         done
243         for VCSH_REPO_NAME in $(list); do
244                 echo "$VCSH_REPO_NAME:"
245                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
246                 use
247                 $command_prefix "$@"
248         done
249         hook post-foreach
250 }
251
252 git_dir_exists() {
253         [ -d "$GIT_DIR" ] || fatal "no repository found for '$VCSH_REPO_NAME'" 12
254 }
255
256 hook() {
257         for hook in "$VCSH_HOOK_D/$1"* "$VCSH_HOOK_D/$VCSH_REPO_NAME.$1"*; do
258                 [ -x "$hook" ] || continue
259                 verbose "executing '$hook'"
260                 "$hook"
261         done
262 }
263
264 init() {
265         hook pre-init
266         [ ! -e "$GIT_DIR" ] || fatal "'$GIT_DIR' exists" 10
267         mkdir -p "$VCSH_BASE" || fatal "could not create '$VCSH_BASE'" 50
268         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
269         git init --shared=false
270         upgrade
271         hook post-init
272 }
273
274 list() {
275         for repo in "$VCSH_REPO_D"/*.git; do
276                 [ -d "$repo" ] && [ -r "$repo" ] && echo "$(basename "$repo" .git)"
277         done
278 }
279
280 get_files() {
281         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
282         git ls-files
283 }
284
285 list_tracked() {
286         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
287         if [ -n "$VCSH_REPO_NAME" ]; then
288                 get_files | list_tracked_helper
289         else
290                 for VCSH_REPO_NAME in $(list); do
291                         get_files
292                 done | list_tracked_helper
293         fi
294 }
295
296 list_tracked_helper() {
297         sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | sed 's/[,\&]/\\&/g')," | sort -u
298 }
299
300 list_tracked_by() {
301         list_tracked '' $2
302 }
303
304 list_untracked() {
305         command -v 'comm' >/dev/null 2>&1 || fatal "Could not find 'comm'"
306
307         temp_file_others=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
308         temp_file_untracked=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
309         temp_file_untracked_copy=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
310
311         # Hack in support for `vcsh list-untracked -r`...
312         exclude_standard_opt='--exclude-standard'
313         directory_opt="--directory"
314         shift 1
315         while getopts "ar" flag; do
316                 if [ x"$1" = x'-a' ]; then
317                         unset exclude_standard_opt
318                 elif [ x"$1" = x'-r' ]; then
319                         unset directory_opt
320                 fi
321                 shift 1
322         done
323         # ...and parse for a potential parameter afterwards. As we shifted things out of $* in during getops, we need to look at $1
324         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
325
326         if [ -n "$VCSH_REPO_NAME" ]; then
327                 list_untracked_helper $VCSH_REPO_NAME
328         else
329                 for VCSH_REPO_NAME in $(list); do
330                         list_untracked_helper $VCSH_REPO_NAME
331                 done
332         fi
333         cat $temp_file_untracked
334
335         unset directory_opt directory_component
336         rm -f $temp_file_others $temp_file_untracked $temp_file_untracked_copy || fatal 'Could not delete temp files'
337 }
338
339 list_untracked_helper() {
340         export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
341         git ls-files --others $exclude_standard_opt "$directory_opt" | (
342                 while read line; do
343                         echo "$line"
344                         directory_component=${line%%/*}
345                         [ -d "$directory_component" ] && printf '%s/\n' "$directory_component"
346                 done
347                 ) | sort -u > $temp_file_others
348         if [ -z "$ran_once" ]; then
349                 ran_once=1
350                 cp $temp_file_others $temp_file_untracked || fatal 'Could not copy temp file'
351         fi
352         cp $temp_file_untracked $temp_file_untracked_copy || fatal 'Could not copy temp file'
353         comm -12 $temp_file_others $temp_file_untracked_copy > $temp_file_untracked
354 }
355
356 pull() {
357         hook pre-pull
358         for VCSH_REPO_NAME in $(list); do
359                 printf '%s: ' "$VCSH_REPO_NAME"
360                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
361                 use
362                 git pull
363                 VCSH_COMMAND_RETURN_CODE=$?
364                 echo
365         done
366         hook post-pull
367 }
368
369 push() {
370         hook pre-push
371         for VCSH_REPO_NAME in $(list); do
372                 printf '%s: ' "$VCSH_REPO_NAME"
373                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
374                 use
375                 git push
376                 VCSH_COMMAND_RETURN_CODE=$?
377                 echo
378         done
379         hook post-push
380 }
381
382 retire() {
383         unset VCSH_DIRECTORY
384 }
385
386 rename() {
387         git_dir_exists
388         [ -d "$GIT_DIR_NEW" ] && fatal "'$GIT_DIR_NEW' exists" 54
389         mv -f "$GIT_DIR" "$GIT_DIR_NEW" || fatal "Could not mv '$GIT_DIR' '$GIT_DIR_NEW'" 52
390
391         # Now that the repository has been renamed, we need to fix up its configuration
392         # Overwrite old name..
393         GIT_DIR=$GIT_DIR_NEW
394         VCSH_REPO_NAME=$VCSH_REPO_NAME_NEW
395         # ..and clobber all old configuration
396         upgrade
397 }
398
399 run() {
400         hook pre-run
401         use
402         "$@"
403         VCSH_COMMAND_RETURN_CODE=$?
404         hook post-run
405 }
406
407 status() {
408         if [ -t 1 ]; then
409                 COLORING="-c color.status=always"
410         fi
411         if [ -n "$VCSH_REPO_NAME" ]; then
412                 status_helper $VCSH_REPO_NAME
413         else
414                 for VCSH_REPO_NAME in $(list); do
415                         STATUS=$(status_helper $VCSH_REPO_NAME "$COLORING")
416                         [ -n "$STATUS" -o -z "$VCSH_STATUS_TERSE" ] && echo "$VCSH_REPO_NAME:"
417                         [ -n "$STATUS" ]            && echo "$STATUS"
418                         [ -z "$VCSH_STATUS_TERSE" ] && echo
419                 done
420         fi
421 }
422
423 status_helper() {
424         GIT_DIR=$VCSH_REPO_D/$1.git; export GIT_DIR
425         VCSH_GIT_OPTIONS=$2
426         use
427         remote_tracking_branch=$(git rev-parse --abbrev-ref --symbolic-full-name @{u} 2> /dev/null) && {
428                 commits_behind=$(git log ..${remote_tracking_branch} --oneline | wc -l)
429                 commits_ahead=$(git log ${remote_tracking_branch}.. --oneline | wc -l)
430                 [ ${commits_behind} -ne 0 ] && echo "Behind $remote_tracking_branch by $commits_behind commits"
431                 [ ${commits_ahead} -ne 0 ] && echo "Ahead of $remote_tracking_branch by $commits_ahead commits"
432         }
433         git ${VCSH_GIT_OPTIONS} status --short --untracked-files='no'
434         VCSH_COMMAND_RETURN_CODE=$?
435 }
436
437 upgrade() {
438         hook pre-upgrade
439         # fake-bare repositories are not bare, actually. Set this to false
440         # because otherwise Git complains "fatal: core.bare and core.worktree
441         # do not make sense"
442         git config core.bare false
443         # core.worktree may be absolute or relative to $GIT_DIR, depending on
444         # user preference
445         if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ]; then
446                 git config core.worktree "$(cd "$GIT_DIR" && GIT_WORK_TREE=$VCSH_BASE git rev-parse --show-cdup)"
447         elif [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
448                 git config core.worktree "$VCSH_BASE"
449         fi
450         [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
451         [ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && git config core.attributesfile ".gitattributes.d/$VCSH_REPO_NAME"
452         git config vcsh.vcsh 'true'
453         use
454         [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME"
455         [ -e "$VCSH_BASE/.gitattributes.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitattributes.d/$VCSH_REPO_NAME"
456         hook post-upgrade
457 }
458
459 use() {
460         git_dir_exists
461         VCSH_DIRECTORY=$VCSH_REPO_NAME; export VCSH_DIRECTORY
462 }
463
464 which() {
465         output=$(for VCSH_REPO_NAME in $(list); do
466                 get_files | grep -- "$VCSH_COMMAND_PARAMETER" | sed "s/^/$VCSH_REPO_NAME: /"
467         done | sort -u)
468         if [ -z "$output" ]; then
469                 fatal "'$VCSH_COMMAND_PARAMETER' does not exist" 1
470         else
471                 echo "$output"
472         fi
473 }
474
475 write_gitignore() {
476         # Don't do anything if the user does not want to write gitignore
477         if [ "x$VCSH_GITIGNORE" = 'xnone' ]; then
478                 info "Not writing gitignore as '\$VCSH_GITIGNORE' is set to 'none'"
479                 exit
480         fi
481
482         use
483         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
484         local GIT_VERSION="$(git --version)"
485         local GIT_VERSION_MAJOR=$(echo $GIT_VERSION | sed -n 's/.* \([0-9]\+\)\..*/\1/p')
486         local GIT_VERSION_MINOR=$(echo $GIT_VERSION | sed -n 's/.* \([0-9]\+\)\.\([0-9]\+\)\..*/\2/p')
487         OLDIFS=$IFS
488         IFS=$(printf '\n\t')
489         gitignores=$(for file in $(git ls-files); do
490                 if [ $GIT_VERSION_MAJOR -ge 2 -a $GIT_VERSION_MINOR -ge 7 ]; then
491                         echo "$file";
492                 else
493                         while true; do
494                                 echo "$file"; new=${file%/*}
495                                 [ x"$file" = x"$new" ] && break
496                                 file=$new
497                         done;
498                 fi
499         done | sort -u)
500
501         # Contrary to GNU mktemp, mktemp on BSD/OSX requires a template for temp files
502         # Using a template makes GNU mktemp default to $PWD and not #TMPDIR for tempfile location
503         # To make every OS happy, set full path explicitly
504         tempfile=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal "could not create tempfile: '${tempfile}'" 51
505
506         echo '*' > "$tempfile" || fatal "could not write to '$tempfile'" 57
507         for gitignore in $gitignores; do
508                 echo "$gitignore" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57
509                 if [ "x$VCSH_GITIGNORE" = 'xrecursive' ] && [ -d "$gitignore" ]; then
510                         { echo "$gitignore/*" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
511                 fi
512         done
513         IFS=$OLDIFS
514         if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
515                 rm -f "$tempfile" || error "could not delete '$tempfile'"
516                 exit
517         fi
518         if [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ]; then
519                 info "'$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' differs from new data, moving it to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'"
520                 mv -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak" ||
521                         fatal "could not move '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'" 53
522         fi
523         mv -f "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ||
524                 fatal "could not move '$tempfile' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME'" 53
525 }
526
527 debug $(git version)
528
529 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
530         fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
531 fi
532
533 VCSH_COMMAND=$1; export VCSH_COMMAND
534
535 case $VCSH_COMMAND in
536         clon|clo|cl) VCSH_COMMAND=clone;;
537         commi|comm|com|co) VCSH_COMMAND=commit;;
538         delet|dele|del|de) VCSH_COMMAND=delete;;
539         ente|ent|en) VCSH_COMMAND=enter;;
540         hel|he) VCSH_COMMAND=help;;
541         ini|in) VCSH_COMMAND=init;;
542         pul) VCSH_COMMAND=pull;;
543         pus) VCSH_COMMAND=push;;
544         renam|rena|ren|re) VCSH_COMMAND=rename;;
545         ru) VCSH_COMMAND=run;;
546         statu|stat|sta|st) VCSH_COMMAND=status;;
547         upgrad|upgra|upgr|up) VCSH_COMMAND=upgrade;;
548         versio|versi|vers|ver|ve) VCSH_COMMAND=version;;
549         which|whi|wh) VCSH_COMMAND=which;;
550         write|writ|wri|wr) VCSH_COMMAND=write-gitignore;;
551 esac    
552
553 if [ x"$VCSH_COMMAND" = x'clone' ]; then
554         VCSH_BRANCH=
555         if [ "$2" = -b ]; then
556                 VCSH_BRANCH=$3
557                 shift
558                 shift
559         fi
560         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a remote" 1
561         GIT_REMOTE="$2"
562         [ -n "$VCSH_BRANCH" ] || if [ "$3" = -b ]; then
563                 VCSH_BRANCH=$4
564                 shift
565                 shift
566         fi
567         if [ -n "$3" ]; then
568                 VCSH_REPO_NAME=$3
569                 [ -z "$VCSH_BRANCH" ] && [ "$4" = -b ] && VCSH_BRANCH=$5
570         else
571                 VCSH_REPO_NAME=$(basename "${GIT_REMOTE#*:}" .git)
572         fi
573         [ -z "$VCSH_REPO_NAME" ] && fatal "$VCSH_COMMAND: could not determine repository name" 1
574         export VCSH_REPO_NAME
575         [ -n "$VCSH_BRANCH" ] || VCSH_BRANCH=master
576         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
577 elif [ "$VCSH_COMMAND" = 'version' ]; then
578         echo "$SELF $VERSION"
579         git version
580         exit
581 elif [ x"$VCSH_COMMAND" = x'which' ]; then
582         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a filename" 1
583         [ -n "$3" ] && fatal "$VCSH_COMMAND: too many parameters" 1
584         VCSH_COMMAND_PARAMETER=$2; export VCSH_COMMAND_PARAMETER
585 elif [ x"$VCSH_COMMAND" = x'delete' ]           ||
586      [ x"$VCSH_COMMAND" = x'enter' ]            ||
587      [ x"$VCSH_COMMAND" = x'init' ]             ||
588      [ x"$VCSH_COMMAND" = x'list-tracked-by' ]  ||
589      [ x"$VCSH_COMMAND" = x'rename' ]           ||
590      [ x"$VCSH_COMMAND" = x'run' ]              ||
591      [ x"$VCSH_COMMAND" = x'upgrade' ]          ||
592      [ x"$VCSH_COMMAND" = x'write-gitignore' ]; then
593         [ -z "$2" ]                                     && fatal "$VCSH_COMMAND: please specify repository to work on" 1
594         [ x"$VCSH_COMMAND" = x'rename' ] && [ -z "$3" ] && fatal "$VCSH_COMMAND: please specify a target name" 1
595         [ x"$VCSH_COMMAND" = x'run'    ] && [ -z "$3" ] && fatal "$VCSH_COMMAND: please specify a command" 1
596         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
597         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
598         [ x"$VCSH_COMMAND" = x'rename' ] && { VCSH_REPO_NAME_NEW=$3; export VCSH_REPO_NAME_NEW;
599                                               GIT_DIR_NEW=$VCSH_REPO_D/$VCSH_REPO_NAME_NEW.git; export GIT_DIR_NEW; }
600         [ x"$VCSH_COMMAND" = x'run' ]    && shift 2
601 elif [ x"$VCSH_COMMAND" = x'foreach' ]; then
602         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a command" 1
603         shift 1
604 elif [ x"$VCSH_COMMAND" = x'commit' ] ||
605      [ x"$VCSH_COMMAND" = x'list'   ] ||
606      [ x"$VCSH_COMMAND" = x'list-tracked' ] ||
607      [ x"$VCSH_COMMAND" = x'list-untracked' ] ||
608      [ x"$VCSH_COMMAND" = x'pull'   ] ||
609      [ x"$VCSH_COMMAND" = x'push'   ]; then
610         :
611 elif [ x"$VCSH_COMMAND" = x'status' ]; then
612         if [ x"$2" = x'--terse' ]; then
613                 VCSH_STATUS_TERSE=1; export VCSH_STATUS_TERSE
614                 shift
615         fi
616         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
617 elif [ -n "$2" ]; then
618         VCSH_COMMAND='run'; export VCSH_COMMAND
619         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
620         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
621         [ -d "$GIT_DIR" ] || { help; exit 1; }
622         shift 1
623         set -- "git" "$@"
624 elif [ -n "$VCSH_COMMAND" ]; then
625         VCSH_COMMAND='enter'; export VCSH_COMMAND
626         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
627         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
628         [ -d "$GIT_DIR" ] || { help; exit 1; }
629 else
630         # $1 is empty, or 'help'
631         help && exit
632 fi
633
634 # Did we receive a directory instead of a name?
635 # Mangle the input to fit normal operation.
636 if echo "$VCSH_REPO_NAME" | grep -q '/'; then
637         GIT_DIR=$VCSH_REPO_NAME; export GIT_DIR
638         VCSH_REPO_NAME=$(basename "$VCSH_REPO_NAME" .git); export VCSH_REPO_NAME
639 fi
640
641 check_dir() {
642         check_directory="$1"
643         if [ ! -d "$check_directory" ]; then
644                 if [ -e "$check_directory" ]; then
645                         fatal "'$check_directory' exists but is not a directory" 13
646                 else
647                         verbose "attempting to create '$check_directory'"
648                         mkdir -p "$check_directory" || fatal "could not create '$check_directory'" 50
649                 fi
650         fi
651 }
652
653 check_dir "$VCSH_REPO_D"
654 [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && check_dir "$VCSH_BASE/.gitignore.d"
655 [ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && check_dir "$VCSH_BASE/.gitattributes.d"
656
657 verbose "$VCSH_COMMAND begin"
658 VCSH_COMMAND=$(echo "$VCSH_COMMAND" | sed 's/-/_/g'); export VCSH_COMMAND
659
660 # Source repo-specific configuration file
661 [ -r "$XDG_CONFIG_HOME/vcsh/config.d/$VCSH_REPO_NAME" ] && . "$XDG_CONFIG_HOME/vcsh/config.d/$VCSH_REPO_NAME"
662
663 # source overlay functions
664 for overlay in "$VCSH_OVERLAY_D/$VCSH_COMMAND"* "$VCSH_OVERLAY_D/$VCSH_REPO_NAME.$VCSH_COMMAND"*; do
665         [ -r "$overlay" ] || continue
666         info "sourcing '$overlay'"
667         . "$overlay"
668 done
669
670 hook pre-command
671 $VCSH_COMMAND "$@"
672 hook post-command
673 verbose "$VCSH_COMMAND end, exiting"
674 exit $VCSH_COMMAND_RETURN_CODE