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d77f7cc87f1df32c07b53d69a4701da76d78eec9
[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 $0)
24
25 fatal() {
26         echo "$SELF: fatal: $1" >&2
27         [ -z $2 ] && exit 1
28         exit $2
29 }
30
31 # We need to run getops as soon as possible so we catch -d and other
32 # options that will modify our behaviour.
33 # Commands are handled at the end of this script.
34 while getopts "c:dv" flag; do
35         if [ x"$1" = x'-d' ] || [ x"$1" = x'--debug' ]; then
36                 set -vx
37                 VCSH_DEBUG=1
38                 echo "debug mode on"
39                 echo "$SELF $VERSION"
40         elif [ x"$1" = x'-v' ]; then
41                 VCSH_VERBOSE=1
42                 echo "verbose mode on"
43                 echo "$SELF $VERSION"
44         elif [ x"$1" = x'-c' ]; then
45                 VCSH_OPTION_CONFIG=$OPTARG
46         fi
47         shift 1
48 done
49
50 source_all() {
51         # Source file even if it's in $PWD and does not have any slashes in it
52         case $1 in
53                 */*) . "$1";;
54                 *)   . "$PWD/$1";;
55         esac;
56 }
57
58
59 # Read configuration and set defaults if anything's not set
60 [ -n "$VCSH_DEBUG" ]                  && set -vx
61 : ${XDG_CONFIG_HOME:="$HOME/.config"}
62
63 # Read configuration files if there are any
64 [ -r "/etc/vcsh/config" ]             && . "/etc/vcsh/config"
65 [ -r "$XDG_CONFIG_HOME/vcsh/config" ] && . "$XDG_CONFIG_HOME/vcsh/config"
66 if [ -n "$VCSH_OPTION_CONFIG" ]; then
67         # Source $VCSH_OPTION_CONFIG if it can be read and is in $PWD of $PATH
68         if [ -r "$VCSH_OPTION_CONFIG" ]; then
69                 source_all "$VCSH_OPTION_CONFIG"
70         else
71                 fatal "Can not read configuration file '$VCSH_OPTION_CONFIG'" 1
72         fi
73 fi
74 [ -n "$VCSH_DEBUG" ]                  && set -vx
75
76 # Read defaults
77 : ${VCSH_REPO_D:="$XDG_CONFIG_HOME/vcsh/repo.d"}
78 : ${VCSH_HOOK_D:="$XDG_CONFIG_HOME/vcsh/hooks-enabled"}
79 : ${VCSH_OVERLAY_D:="$XDG_CONFIG_HOME/vcsh/overlays-enabled"}
80 : ${VCSH_BASE:="$HOME"}
81 : ${VCSH_GITIGNORE:=exact}
82 : ${VCSH_GITATTRIBUTES:=none}
83 : ${VCSH_WORKTREE:=absolute}
84
85 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
86         fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
87 fi
88
89 if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ] && [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
90         fatal "'\$VCSH_WORKTREE' must equal 'absolute', or 'relative'" 1
91 fi
92
93
94 help() {
95         echo "usage: $SELF <options> <command>
96
97    options:
98    -c <file>            Source file
99    -d                   Enable debug mode
100    -v                   Enable verbose mode
101
102    commands:
103    clone [-b <branch>] \\
104          <remote> \\
105          [<repo>]       Clone from an existing repository
106    commit               Commit in all repositories
107    delete <repo>        Delete an existing repository
108    enter <repo>         Enter repository; spawn new instance of \$SHELL
109    help                 Display this help text
110    init <repo>          Initialize a new repository
111    list                 List all repositories
112    list-tracked \\
113         [<repo>]        List all files tracked all or one repositories
114    list-untracked \\
115         [<-r>] [<repo>] List all files not tracked by all or one repositories
116    pull                 Pull from all vcsh remotes
117    push                 Push to vcsh remotes
118    rename <repo> \\
119           <newname>     Rename repository
120    run <repo> \\
121        <command>        Use this repository
122    status \\
123      [--terse] [<repo>] Show statuses of all/one vcsh repositories
124    upgrade <repo>       Upgrade repository to currently recommended settings
125    version              Print version information
126    which <substring>    Find substring in name of any tracked file
127    write-gitignore \\
128    <repo>               Write .gitignore.d/<repo> via git ls-files
129
130    <repo> <git command> Shortcut to run git commands directly
131    <repo>               Shortcut to enter repository" >&2
132 }
133
134 debug() {
135         [ -n "$VCSH_DEBUG" ] && echo "$SELF: debug: $@"
136 }
137
138 verbose() {
139         if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
140 }
141
142 error() {
143         echo "$SELF: error: $1" >&2
144 }
145
146 info() {
147         echo "$SELF: info: $1"
148 }
149
150 clone() {
151         hook pre-clone
152         init
153         git remote add origin "$GIT_REMOTE"
154         git checkout -b "$VCSH_BRANCH" || return $?
155         git config branch."$VCSH_BRANCH".remote origin
156         git config branch."$VCSH_BRANCH".merge  refs/heads/"$VCSH_BRANCH"
157         if [ $(git ls-remote origin "$VCSH_BRANCH" 2> /dev/null | wc -l ) -lt 1 ]; then
158                 info "remote is empty, not merging anything.
159   You should add files to your new repository."
160                 exit
161         fi
162         GIT_VERSION_MAJOR=$(git --version | sed -n 's/.* \([0-9]\)\..*/\1/p' )
163         if [ 2 -ge "$GIT_VERSION_MAJOR" ];then
164                 git fetch origin "$VCSH_BRANCH"
165         else
166                 git fetch origin
167         fi
168         hook pre-merge
169         git ls-tree -r --name-only origin/"$VCSH_BRANCH" | (while read object; do
170                 [ -e "$object" ] &&
171                         error "'$object' exists." &&
172                         VCSH_CONFLICT=1
173         done
174         [ x"$VCSH_CONFLICT" = x'1' ]) &&
175                 fatal "will stop after fetching and not try to merge!
176   Once this situation has been resolved, run 'vcsh $VCSH_REPO_NAME pull' to finish cloning." 17
177         git -c merge.ff=true merge origin/"$VCSH_BRANCH"
178         hook post-merge
179         hook post-clone
180         retire
181         hook post-clone-retired
182 }
183
184 commit() {
185         hook pre-commit
186         for VCSH_REPO_NAME in $(list); do
187                 echo "$VCSH_REPO_NAME: "
188                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
189                 use
190                 git commit --untracked-files=no --quiet
191                 VCSH_COMMAND_RETURN_CODE=$?
192                 echo
193         done
194         hook post-commit
195 }
196
197 delete() {
198         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
199         use
200         info "This operation WILL DESTROY DATA!"
201         files=$(git ls-files)
202         echo "These files will be deleted:
203
204 $files
205
206 AGAIN, THIS WILL DELETE YOUR DATA!
207 To continue, type 'Yes, do as I say'"
208         read answer
209         [ "x$answer" = 'xYes, do as I say' ] || exit 16
210         for file in $files; do
211                 rm -f $file || info "could not delete '$file', continuing with deletion"
212         done
213         rm -rf "$GIT_DIR" || error "could not delete '$GIT_DIR'"
214 }
215
216 enter() {
217         hook pre-enter
218         use
219         $SHELL
220         hook post-enter
221 }
222
223 git_dir_exists() {
224         [ -d "$GIT_DIR" ] || fatal "no repository found for '$VCSH_REPO_NAME'" 12
225 }
226
227 hook() {
228         for hook in "$VCSH_HOOK_D/$1"* "$VCSH_HOOK_D/$VCSH_REPO_NAME.$1"*; do
229                 [ -x "$hook" ] || continue
230                 verbose "executing '$hook'"
231                 "$hook"
232         done
233 }
234
235 init() {
236         hook pre-init
237         [ ! -e "$GIT_DIR" ] || fatal "'$GIT_DIR' exists" 10
238         mkdir -p "$VCSH_BASE" || fatal "could not create '$VCSH_BASE'" 50
239         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
240         git init --shared=0600
241         upgrade
242         hook post-init
243 }
244
245 list() {
246         for repo in "$VCSH_REPO_D"/*.git; do
247                 [ -d "$repo" ] && [ -r "$repo" ] && echo "$(basename "$repo" .git)"
248         done
249 }
250
251 get_files() {
252         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
253         git ls-files
254 }
255
256 list_tracked() {
257         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
258         if [ -n "$VCSH_REPO_NAME" ]; then
259                 get_files | list_tracked_helper
260         else
261                 for VCSH_REPO_NAME in $(list); do
262                         get_files
263                 done | list_tracked_helper
264         fi
265 }
266
267 list_tracked_helper() {
268         sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | sed 's/[,\&]/\\&/g')," | sort -u
269 }
270
271 list_tracked_by() {
272         list_tracked '' $2
273 }
274
275 list_untracked() {
276         command -v 'comm' >/dev/null 2>&1 || fatal "Could not find 'comm'"
277
278         temp_file_others=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
279         temp_file_untracked=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
280         temp_file_untracked_copy=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal 'Could not create temp file'
281
282         # Hack in support for `vcsh list-untracked -r`...
283         directory_opt="--directory"
284         shift 1
285         while getopts "r" flag; do
286                 if [ x"$1" = x'-r' ]; then
287                         unset directory_opt
288                 fi
289                 shift 1
290         done
291         # ...and parse for a potential parameter afterwards. As we shifted things out of $* in during getops, we need to look at $1
292         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
293
294         if [ -n "$VCSH_REPO_NAME" ]; then
295                 list_untracked_helper $VCSH_REPO_NAME
296         else
297                 for VCSH_REPO_NAME in $(list); do
298                         list_untracked_helper $VCSH_REPO_NAME
299                 done
300         fi
301         cat $temp_file_untracked
302
303         unset directory_opt directory_component
304         rm -f $temp_file_others $temp_file_untracked $temp_file_untracked_copy || fatal 'Could not delete temp files'
305 }
306
307 list_untracked_helper() {
308         export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
309         git ls-files --others "$directory_opt" | (
310                 while read line; do
311                         echo "$line"
312                         directory_component=${line%%/*}
313                         [ -d "$directory_component" ] && printf '%s/\n' "$directory_component"
314                 done
315                 ) | sort -u > $temp_file_others
316         if [ -z "$ran_once" ]; then
317                 ran_once=1
318                 cp $temp_file_others $temp_file_untracked || fatal 'Could not copy temp file'
319         fi
320         cp $temp_file_untracked $temp_file_untracked_copy || fatal 'Could not copy temp file'
321         comm -12 $temp_file_others $temp_file_untracked_copy > $temp_file_untracked
322 }
323
324 pull() {
325         hook pre-pull
326         for VCSH_REPO_NAME in $(list); do
327                 printf '%s: ' "$VCSH_REPO_NAME"
328                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
329                 use
330                 git pull
331                 VCSH_COMMAND_RETURN_CODE=$?
332                 echo
333         done
334         hook post-pull
335 }
336
337 push() {
338         hook pre-push
339         for VCSH_REPO_NAME in $(list); do
340                 printf '%s: ' "$VCSH_REPO_NAME"
341                 GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
342                 use
343                 git push
344                 VCSH_COMMAND_RETURN_CODE=$?
345                 echo
346         done
347         hook post-push
348 }
349
350 retire() {
351         unset VCSH_DIRECTORY
352 }
353
354 rename() {
355         git_dir_exists
356         [ -d "$GIT_DIR_NEW" ] && fatal "'$GIT_DIR_NEW' exists" 54
357         mv -f "$GIT_DIR" "$GIT_DIR_NEW" || fatal "Could not mv '$GIT_DIR' '$GIT_DIR_NEW'" 52
358
359         # Now that the repository has been renamed, we need to fix up its configuration
360         # Overwrite old name..
361         GIT_DIR=$GIT_DIR_NEW
362         VCSH_REPO_NAME=$VCSH_REPO_NAME_NEW
363         # ..and clobber all old configuration
364         upgrade
365 }
366
367 run() {
368         hook pre-run
369         use
370         "$@"
371         VCSH_COMMAND_RETURN_CODE=$?
372         hook post-run
373 }
374
375 status() {
376         if [ -t 1 ]; then
377                 COLORING="-c color.status=always"
378         fi
379         if [ -n "$VCSH_REPO_NAME" ]; then
380                 status_helper $VCSH_REPO_NAME
381         else
382                 for VCSH_REPO_NAME in $(list); do
383                         STATUS=$(status_helper $VCSH_REPO_NAME "$COLORING")
384                         [ -n "$STATUS" -o -z "$VCSH_STATUS_TERSE" ] && echo "$VCSH_REPO_NAME:"
385                         [ -n "$STATUS" ]            && echo "$STATUS"
386                         [ -z "$VCSH_STATUS_TERSE" ] && echo
387                 done
388         fi
389 }
390
391 status_helper() {
392         GIT_DIR=$VCSH_REPO_D/$1.git; export GIT_DIR
393         VCSH_GIT_OPTIONS=$2
394         use
395         remote_tracking_branch=$(git rev-parse --abbrev-ref --symbolic-full-name @{u} 2> /dev/null) && {
396                 commits_behind=$(git log ..${remote_tracking_branch} --oneline | wc -l)
397                 commits_ahead=$(git log ${remote_tracking_branch}.. --oneline | wc -l)
398                 [ ${commits_behind} -ne 0 ] && echo "Behind $remote_tracking_branch by $commits_behind commits"
399                 [ ${commits_ahead} -ne 0 ] && echo "Ahead of $remote_tracking_branch by $commits_ahead commits"
400         }
401         git ${VCSH_GIT_OPTIONS} status --short --untracked-files='no'
402         VCSH_COMMAND_RETURN_CODE=$?
403 }
404
405 upgrade() {
406         hook pre-upgrade
407         # fake-bare repositories are not bare, actually. Set this to false
408         # because otherwise Git complains "fatal: core.bare and core.worktree
409         # do not make sense"
410         git config core.bare false
411         # core.worktree may be absolute or relative to $GIT_DIR, depending on
412         # user preference
413         if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ]; then
414                 git config core.worktree "$(cd "$GIT_DIR" && GIT_WORK_TREE=$VCSH_BASE git rev-parse --show-cdup)"
415         elif [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
416                 git config core.worktree "$VCSH_BASE"
417         fi
418         [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
419         [ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && git config core.attributesfile ".gitattributes.d/$VCSH_REPO_NAME"
420         git config vcsh.vcsh 'true'
421         use
422         [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME"
423         [ -e "$VCSH_BASE/.gitattributes.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitattributes.d/$VCSH_REPO_NAME"
424         hook post-upgrade
425 }
426
427 use() {
428         git_dir_exists
429         VCSH_DIRECTORY=$VCSH_REPO_NAME; export VCSH_DIRECTORY
430 }
431
432 which() {
433         output=$(for VCSH_REPO_NAME in $(list); do
434                 get_files | grep -- "$VCSH_COMMAND_PARAMETER" | sed "s/^/$VCSH_REPO_NAME: /"
435         done | sort -u)
436         if [ -z "$output" ]; then
437                 fatal "'$VCSH_COMMAND_PARAMETER' does not exist" 1
438         else
439                 echo "$output"
440         fi
441 }
442
443 write_gitignore() {
444         # Don't do anything if the user does not want to write gitignore
445         if [ "x$VCSH_GITIGNORE" = 'xnone' ]; then
446                 info "Not writing gitignore as '\$VCSH_GITIGNORE' is set to 'none'"
447                 exit
448         fi
449
450         use
451         cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
452         OLDIFS=$IFS
453         IFS=$(printf '\n\t')
454         gitignores=$(for file in $(git ls-files); do
455                 while true; do
456                         echo "$file"; new=${file%/*}
457                         [ x"$file" = x"$new" ] && break
458                         file=$new
459                 done;
460         done | sort -u)
461
462         # Contrary to GNU mktemp, mktemp on BSD/OSX requires a template for temp files
463         # Using a template makes GNU mktemp default to $PWD and not #TMPDIR for tempfile location
464         # To make every OS happy, set full path explicitly
465         tempfile=$(mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") || fatal "could not create tempfile: '${tempfile}'" 51
466
467         echo '*' > "$tempfile" || fatal "could not write to '$tempfile'" 57
468         for gitignore in $gitignores; do
469                 echo "$gitignore" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57
470                 if [ "x$VCSH_GITIGNORE" = 'xrecursive' ] && [ -d "$gitignore" ]; then
471                         { echo "$gitignore/*" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
472                 fi
473         done
474         IFS=$OLDIFS
475         if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
476                 rm -f "$tempfile" || error "could not delete '$tempfile'"
477                 exit
478         fi
479         if [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ]; then
480                 info "'$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' differs from new data, moving it to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'"
481                 mv -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak" ||
482                         fatal "could not move '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'" 53
483         fi
484         mv -f "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ||
485                 fatal "could not move '$tempfile' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME'" 53
486 }
487
488 debug $(git version)
489
490 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
491         fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
492 fi
493
494 VCSH_COMMAND=$1; export VCSH_COMMAND
495
496 case $VCSH_COMMAND in
497         clon|clo|cl) VCSH_COMMAND=clone;;
498         commi|comm|com|co) VCSH_COMMAND=commit;;
499         delet|dele|del|de) VCSH_COMMAND=delete;;
500         ente|ent|en) VCSH_COMMAND=enter;;
501         hel|he) VCSH_COMMAND=help;;
502         ini|in) VCSH_COMMAND=init;;
503         pul) VCSH_COMMAND=pull;;
504         pus) VCSH_COMMAND=push;;
505         renam|rena|ren|re) VCSH_COMMAND=rename;;
506         ru) VCSH_COMMAND=run;;
507         statu|stat|sta|st) VCSH_COMMAND=status;;
508         upgrad|upgra|upgr|up) VCSH_COMMAND=upgrade;;
509         versio|versi|vers|ver|ve) VCSH_COMMAND=version;;
510         which|whi|wh) VCSH_COMMAND=which;;
511         write|writ|wri|wr) VCSH_COMMAND=write-gitignore;;
512 esac    
513
514 if [ x"$VCSH_COMMAND" = x'clone' ]; then
515         VCSH_BRANCH=
516         if [ "$2" = -b ]; then
517                 VCSH_BRANCH=$3
518                 shift
519                 shift
520         fi
521         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a remote" 1
522         GIT_REMOTE="$2"
523         [ -n "$VCSH_BRANCH" ] || if [ "$3" = -b ]; then
524                 VCSH_BRANCH=$4
525                 shift
526                 shift
527         fi
528         if [ -n "$3" ]; then
529                 VCSH_REPO_NAME=$3
530                 [ -z "$VCSH_BRANCH" ] && [ "$4" = -b ] && VCSH_BRANCH=$5
531         else
532                 VCSH_REPO_NAME=$(basename "${GIT_REMOTE#*:}" .git)
533         fi
534         [ -z "$VCSH_REPO_NAME" ] && fatal "$VCSH_COMMAND: could not determine repository name" 1
535         export VCSH_REPO_NAME
536         [ -n "$VCSH_BRANCH" ] || VCSH_BRANCH=master
537         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
538 elif [ "$VCSH_COMMAND" = 'version' ]; then
539         echo "$SELF $VERSION"
540         git version
541         exit
542 elif [ x"$VCSH_COMMAND" = x'which' ]; then
543         [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a filename" 1
544         [ -n "$3" ] && fatal "$VCSH_COMMAND: too many parameters" 1
545         VCSH_COMMAND_PARAMETER=$2; export VCSH_COMMAND_PARAMETER
546 elif [ x"$VCSH_COMMAND" = x'delete' ]           ||
547      [ x"$VCSH_COMMAND" = x'enter' ]            ||
548      [ x"$VCSH_COMMAND" = x'init' ]             ||
549      [ x"$VCSH_COMMAND" = x'list-tracked-by' ]  ||
550      [ x"$VCSH_COMMAND" = x'rename' ]           ||
551      [ x"$VCSH_COMMAND" = x'run' ]              ||
552      [ x"$VCSH_COMMAND" = x'upgrade' ]          ||
553      [ x"$VCSH_COMMAND" = x'write-gitignore' ]; then
554         [ -z "$2" ]                                     && fatal "$VCSH_COMMAND: please specify repository to work on" 1
555         [ x"$VCSH_COMMAND" = x'rename' ] && [ -z "$3" ] && fatal "$VCSH_COMMAND: please specify a target name" 1
556         [ x"$VCSH_COMMAND" = x'run'    ] && [ -z "$3" ] && fatal "$VCSH_COMMAND: please specify a command" 1
557         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
558         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
559         [ x"$VCSH_COMMAND" = x'rename' ] && { VCSH_REPO_NAME_NEW=$3; export VCSH_REPO_NAME_NEW;
560                                               GIT_DIR_NEW=$VCSH_REPO_D/$VCSH_REPO_NAME_NEW.git; export GIT_DIR_NEW; }
561         [ x"$VCSH_COMMAND" = x'run' ]    && shift 2
562 elif [ x"$VCSH_COMMAND" = x'commit' ] ||
563      [ x"$VCSH_COMMAND" = x'list'   ] ||
564      [ x"$VCSH_COMMAND" = x'list-tracked' ] ||
565      [ x"$VCSH_COMMAND" = x'list-untracked' ] ||
566      [ x"$VCSH_COMMAND" = x'pull'   ] ||
567      [ x"$VCSH_COMMAND" = x'push'   ]; then
568         :
569 elif [ x"$VCSH_COMMAND" = x'status' ]; then
570         if [ x"$2" = x'--terse' ]; then
571                 VCSH_STATUS_TERSE=1; export VCSH_STATUS_TERSE
572                 shift
573         fi
574         VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
575 elif [ -n "$2" ]; then
576         VCSH_COMMAND='run'; export VCSH_COMMAND
577         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
578         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
579         [ -d "$GIT_DIR" ] || { help; exit 1; }
580         shift 1
581         set -- "git" "$@"
582 elif [ -n "$VCSH_COMMAND" ]; then
583         VCSH_COMMAND='enter'; export VCSH_COMMAND
584         VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
585         GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
586         [ -d "$GIT_DIR" ] || { help; exit 1; }
587 else
588         # $1 is empty, or 'help'
589         help && exit
590 fi
591
592 # Did we receive a directory instead of a name?
593 # Mangle the input to fit normal operation.
594 if echo "$VCSH_REPO_NAME" | grep -q '/'; then
595         GIT_DIR=$VCSH_REPO_NAME; export GIT_DIR
596         VCSH_REPO_NAME=$(basename "$VCSH_REPO_NAME" .git); export VCSH_REPO_NAME
597 fi
598
599 check_dir() {
600         check_directory="$1"
601         if [ ! -d "$check_directory" ]; then
602                 if [ -e "$check_directory" ]; then
603                         fatal "'$check_directory' exists but is not a directory" 13
604                 else
605                         verbose "attempting to create '$check_directory'"
606                         mkdir -p "$check_directory" || fatal "could not create '$check_directory'" 50
607                 fi
608         fi
609 }
610
611 check_dir "$VCSH_REPO_D"
612 [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && check_dir "$VCSH_BASE/.gitignore.d"
613 [ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && check_dir "$VCSH_BASE/.gitattributes.d"
614
615 verbose "$VCSH_COMMAND begin"
616 VCSH_COMMAND=$(echo "$VCSH_COMMAND" | sed 's/-/_/g'); export VCSH_COMMAND
617
618 # Source repo-specific configuration file
619 [ -r "$XDG_CONFIG_HOME/vcsh/config.d/$VCSH_REPO_NAME" ] && . "$XDG_CONFIG_HOME/vcsh/config.d/$VCSH_REPO_NAME"
620
621 # source overlay functions
622 for overlay in "$VCSH_OVERLAY_D/$VCSH_COMMAND"* "$VCSH_OVERLAY_D/$VCSH_REPO_NAME.$VCSH_COMMAND"*; do
623         [ -r "$overlay" ] || continue
624         info "sourcing '$overlay'"
625         . "$overlay"
626 done
627
628 hook pre-command
629 $VCSH_COMMAND "$@"
630 hook post-command
631 verbose "$VCSH_COMMAND end, exiting"
632 exit $VCSH_COMMAND_RETURN_CODE