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1# Copyright 1999-2013 Gentoo Foundation 1# Copyright 1999-2014 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/git-r3.eclass,v 1.21 2013/10/27 13:44:35 mgorny Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/git-r3.eclass,v 1.44 2014/06/20 11:40:28 mgorny Exp $
4 4
5# @ECLASS: git-r3.eclass 5# @ECLASS: git-r3.eclass
6# @MAINTAINER: 6# @MAINTAINER:
7# Michał Górny <mgorny@gentoo.org> 7# Michał Górny <mgorny@gentoo.org>
8# @BLURB: Eclass for fetching and unpacking git repositories. 8# @BLURB: Eclass for fetching and unpacking git repositories.
9# @DESCRIPTION: 9# @DESCRIPTION:
10# Third generation eclass for easing maitenance of live ebuilds using 10# Third generation eclass for easing maitenance of live ebuilds using
11# git as remote repository. The eclass supports lightweight (shallow) 11# git as remote repository.
12# clones and bare clones of submodules.
13 12
14case "${EAPI:-0}" in 13case "${EAPI:-0}" in
15 0|1|2|3|4|5) 14 0|1|2|3|4|5)
16 ;; 15 ;;
17 *) 16 *)
31 30
32if [[ ! ${_INHERITED_BY_GIT_2} ]]; then 31if [[ ! ${_INHERITED_BY_GIT_2} ]]; then
33 DEPEND=">=dev-vcs/git-1.8.2.1" 32 DEPEND=">=dev-vcs/git-1.8.2.1"
34fi 33fi
35 34
35# @ECLASS-VARIABLE: EGIT_CLONE_TYPE
36# @DESCRIPTION:
37# Type of clone that should be used against the remote repository.
38# This can be either of: 'mirror', 'single', 'shallow'.
39#
40# This is intended to be set by user in make.conf. Ebuilds are supposed
41# to set EGIT_MIN_CLONE_TYPE if necessary instead.
42#
43# The 'mirror' type clones all remote branches and tags with complete
44# history and all notes. EGIT_COMMIT can specify any commit hash.
45# Upstream-removed branches and tags are purged from the local clone
46# while fetching. This mode is suitable for cloning the local copy
47# for development or hosting a local git mirror. However, clones
48# of repositories with large diverged branches may quickly grow large.
49#
50# The 'single+tags' type clones the requested branch and all tags
51# in the repository. All notes are fetched as well. EGIT_COMMIT
52# can safely specify hashes throughout the current branch and all tags.
53# No purging of old references is done (if you often switch branches,
54# you may need to remove stale branches yourself). This mode is intended
55# mostly for use with broken git servers such as Google Code that fail
56# to fetch tags along with the branch in 'single' mode.
57#
58# The 'single' type clones only the requested branch or tag. Tags
59# referencing commits throughout the branch history are fetched as well,
60# and all notes. EGIT_COMMIT can safely specify only hashes
61# in the current branch. No purging of old references is done (if you
62# often switch branches, you may need to remove stale branches
63# yourself). This mode is suitable for general use.
64#
65# The 'shallow' type clones only the newest commit on requested branch
66# or tag. EGIT_COMMIT can only specify tags, and since the history is
67# unavailable calls like 'git describe' will not reference prior tags.
68# No purging of old references is done. This mode is intended mostly for
69# embedded systems with limited disk space.
70: ${EGIT_CLONE_TYPE:=single}
71
72# @ECLASS-VARIABLE: EGIT_MIN_CLONE_TYPE
73# @DESCRIPTION:
74# 'Minimum' clone type supported by the ebuild. Takes same values
75# as EGIT_CLONE_TYPE. When user sets a type that's 'lower' (that is,
76# later on the list) than EGIT_MIN_CLONE_TYPE, the eclass uses
77# EGIT_MIN_CLONE_TYPE instead.
78#
79# This variable is intended to be used by ebuilds only. Users are
80# supposed to set EGIT_CLONE_TYPE instead.
81#
82# A common case is to use 'single' whenever the build system requires
83# access to full branch history, or 'single+tags' when Google Code
84# or a similar remote is used that does not support shallow clones
85# and fetching tags along with commits. Please use sparingly, and to fix
86# fatal errors rather than 'non-pretty versions'.
87: ${EGIT_MIN_CLONE_TYPE:=shallow}
88
36# @ECLASS-VARIABLE: EGIT3_STORE_DIR 89# @ECLASS-VARIABLE: EGIT3_STORE_DIR
37# @DESCRIPTION: 90# @DESCRIPTION:
38# Storage directory for git sources. 91# Storage directory for git sources.
39# 92#
93# This is intended to be set by user in make.conf. Ebuilds must not set
94# it.
95#
40# EGIT3_STORE_DIR=${DISTDIR}/git3-src 96# EGIT3_STORE_DIR=${DISTDIR}/git3-src
97
98# @ECLASS-VARIABLE: EGIT_MIRROR_URI
99# @DEFAULT_UNSET
100# @DESCRIPTION:
101# 'Top' URI to a local git mirror. If specified, the eclass will try
102# to fetch from the local mirror instead of using the remote repository.
103#
104# The mirror needs to follow EGIT3_STORE_DIR structure. The directory
105# created by eclass can be used for that purpose.
106#
107# Example:
108# @CODE
109# EGIT_MIRROR_URI="git://mirror.lan/"
110# @CODE
41 111
42# @ECLASS-VARIABLE: EGIT_REPO_URI 112# @ECLASS-VARIABLE: EGIT_REPO_URI
43# @REQUIRED 113# @REQUIRED
44# @DESCRIPTION: 114# @DESCRIPTION:
45# URIs to the repository, e.g. git://foo, https://foo. If multiple URIs 115# URIs to the repository, e.g. git://foo, https://foo. If multiple URIs
81# @DESCRIPTION: 151# @DESCRIPTION:
82# The directory to check the git sources out to. 152# The directory to check the git sources out to.
83# 153#
84# EGIT_CHECKOUT_DIR=${WORKDIR}/${P} 154# EGIT_CHECKOUT_DIR=${WORKDIR}/${P}
85 155
86# @ECLASS-VARIABLE: EGIT_NONSHALLOW
87# @DEFAULT_UNSET
88# @DESCRIPTION:
89# Disable performing shallow fetches/clones. Shallow clones have
90# a fair number of limitations. Therefore, if you'd like the eclass to
91# perform complete clones instead, set this to a non-null value.
92#
93# This variable can be set in make.conf and ebuilds. The make.conf
94# value specifies user-specific default, while ebuilds may use it
95# to force deep clones when the server does not support shallow clones
96# (e.g. Google Code).
97
98# @FUNCTION: _git-r3_env_setup 156# @FUNCTION: _git-r3_env_setup
99# @INTERNAL 157# @INTERNAL
100# @DESCRIPTION: 158# @DESCRIPTION:
101# Set the eclass variables as necessary for operation. This can involve 159# Set the eclass variables as necessary for operation. This can involve
102# setting EGIT_* to defaults or ${PN}_LIVE_* variables. 160# setting EGIT_* to defaults or ${PN}_LIVE_* variables.
103_git-r3_env_setup() { 161_git-r3_env_setup() {
104 debug-print-function ${FUNCNAME} "$@" 162 debug-print-function ${FUNCNAME} "$@"
163
164 # check the clone type
165 case "${EGIT_CLONE_TYPE}" in
166 mirror|single+tags|single|shallow)
167 ;;
168 *)
169 die "Invalid EGIT_CLONE_TYPE=${EGIT_CLONE_TYPE}"
170 esac
171 case "${EGIT_MIN_CLONE_TYPE}" in
172 shallow)
173 ;;
174 single)
175 if [[ ${EGIT_CLONE_TYPE} == shallow ]]; then
176 einfo "git-r3: ebuild needs to be cloned in 'single' mode, adjusting"
177 EGIT_CLONE_TYPE=single
178 fi
179 ;;
180 single+tags)
181 if [[ ${EGIT_CLONE_TYPE} == shallow || ${EGIT_CLONE_TYPE} == single ]]; then
182 einfo "git-r3: ebuild needs to be cloned in 'single+tags' mode, adjusting"
183 EGIT_CLONE_TYPE=single+tags
184 fi
185 ;;
186 mirror)
187 if [[ ${EGIT_CLONE_TYPE} != mirror ]]; then
188 einfo "git-r3: ebuild needs to be cloned in 'mirror' mode, adjusting"
189 EGIT_CLONE_TYPE=mirror
190 fi
191 ;;
192 *)
193 die "Invalid EGIT_MIN_CLONE_TYPE=${EGIT_MIN_CLONE_TYPE}"
194 esac
105 195
106 local esc_pn livevar 196 local esc_pn livevar
107 esc_pn=${PN//[-+]/_} 197 esc_pn=${PN//[-+]/_}
108 198
109 livevar=${esc_pn}_LIVE_REPO 199 livevar=${esc_pn}_LIVE_REPO
218 308
219 addwrite "${EGIT3_STORE_DIR}" 309 addwrite "${EGIT3_STORE_DIR}"
220 if [[ ! -d ${GIT_DIR} ]]; then 310 if [[ ! -d ${GIT_DIR} ]]; then
221 mkdir "${GIT_DIR}" || die 311 mkdir "${GIT_DIR}" || die
222 git init --bare || die 312 git init --bare || die
223
224 if [[ ! ${EGIT_NONSHALLOW} ]]; then
225 # avoid auto-unshallow :)
226 touch "${GIT_DIR}"/shallow || die
227 fi
228 fi 313 fi
229} 314}
230 315
231# @FUNCTION: _git-r3_set_submodules 316# @FUNCTION: _git-r3_set_submodules
232# @USAGE: <file-contents> 317# @USAGE: <file-contents>
265 submodule."${subname}".path || die)" 350 submodule."${subname}".path || die)"
266 ) 351 )
267 done < <(echo "${data}" | git config -f /dev/fd/0 -l || die) 352 done < <(echo "${data}" | git config -f /dev/fd/0 -l || die)
268} 353}
269 354
270# @FUNCTION: _git-r3_smart_fetch 355# @FUNCTION: _git-r3_set_subrepos
271# @USAGE: <git-fetch-args>... 356# @USAGE: <submodule-uri> <parent-repo-uri>...
357# @INTERNAL
272# @DESCRIPTION: 358# @DESCRIPTION:
273# Try fetching without '--depth' and switch to '--depth 1' if that 359# Create 'subrepos' array containing absolute (canonical) submodule URIs
274# will involve less objects fetched. 360# for the given <submodule-uri>. If the URI is relative, URIs will be
275_git-r3_smart_fetch() { 361# constructed using all <parent-repo-uri>s. Otherwise, this single URI
362# will be placed in the array.
363_git-r3_set_subrepos() {
276 debug-print-function ${FUNCNAME} "$@" 364 debug-print-function ${FUNCNAME} "$@"
277 365
278 local sed_regexp='.*Counting objects: \([0-9]*\), done\..*' 366 local suburl=${1}
367 subrepos=( "${@:2}" )
279 368
280 # start the main fetch 369 if [[ ${suburl} == ./* || ${suburl} == ../* ]]; then
281 local cmd=( git fetch --progress "${@}" ) 370 # drop all possible trailing slashes for consistency
282 echo "${cmd[@]}" >&2 371 subrepos=( "${subrepos[@]%%/}" )
283 372
284 # we copy the output to the 'sed' pipe for parsing. whenever sed finds 373 while true; do
285 # the process count, it quits quickly to avoid delays in writing it. 374 if [[ ${suburl} == ./* ]]; then
286 # then, we start a dummy 'cat' to keep the pipe alive 375 suburl=${suburl:2}
376 elif [[ ${suburl} == ../* ]]; then
377 suburl=${suburl:3}
287 378
288 "${cmd[@]}" 2>&1 \ 379 # XXX: correctness checking
289 | tee >(
290 sed -n -e "/${sed_regexp}/{s/${sed_regexp}/\1/p;q}" \
291 > "${T}"/git-r3_main.count
292 exec cat >/dev/null
293 ) &
294 local main_pid=${!}
295 380
296 # start the helper process 381 # drop the last path component
297 _git-r3_sub_fetch() { 382 subrepos=( "${subrepos[@]%/*}" )
298 # wait for main fetch to get object count; if the server doesn't 383 # and then the trailing slashes, again
299 # output it, we won't even launch the parallel process 384 subrepos=( "${subrepos[@]%%/}" )
300 while [[ ! -s ${T}/git-r3_main.count ]]; do 385 else
301 sleep 0.25 386 break
387 fi
302 done 388 done
303 389
304 # ok, let's see if parallel fetch gives us smaller count 390 # append the preprocessed path to the preprocessed URIs
305 # --dry-run will prevent it from writing to the local clone 391 subrepos=( "${subrepos[@]/%//${suburl}}")
306 # and sed should terminate git with SIGPIPE 392 else
307 local sub_count=$(git fetch --progress --dry-run --depth 1 "${@}" 2>&1 \ 393 subrepos=( "${suburl}" )
308 | sed -n -e "/${sed_regexp}/{s/${sed_regexp}/\1/p;q}") 394 fi
309 local main_count=$(<"${T}"/git-r3_main.count) 395}
310 396
311 # let's be real sure that '--depth 1' will be good for us. 397
312 # note that we have purely objects counts, and '--depth 1' 398# @FUNCTION: _git-r3_is_local_repo
313 # may involve much bigger objects 399# @USAGE: <repo-uri>
314 if [[ ${main_count} && ${main_count} -ge $(( sub_count * 3/2 )) ]] 400# @INTERNAL
315 then 401# @DESCRIPTION:
316 # signal that we want shallow fetch instead, 402# Determine whether the given URI specifies a local (on-disk)
317 # and terminate the non-shallow fetch process 403# repository.
318 touch "${T}"/git-r3_want_shallow || die 404_git-r3_is_local_repo() {
319 kill ${main_pid} &>/dev/null 405 debug-print-function ${FUNCNAME} "$@"
320 exit 0 406
407 local uri=${1}
408
409 [[ ${uri} == file://* || ${uri} == /* ]]
410}
411
412# @FUNCTION: _git-r3_find_head
413# @USAGE: <head-ref>
414# @INTERNAL
415# @DESCRIPTION:
416# Given a ref to which remote HEAD was fetched, try to find
417# a branch matching the commit. Expects 'git show-ref'
418# or 'git ls-remote' output on stdin.
419_git-r3_find_head() {
420 debug-print-function ${FUNCNAME} "$@"
421
422 local head_ref=${1}
423 local head_hash=$(git rev-parse --verify "${1}" || die)
424 local matching_ref
425
426 # TODO: some transports support peeking at symbolic remote refs
427 # find a way to use that rather than guessing
428
429 # (based on guess_remote_head() in git-1.9.0/remote.c)
430 local h ref
431 while read h ref; do
432 # look for matching head
433 if [[ ${h} == ${head_hash} ]]; then
434 # either take the first matching ref, or master if it is there
435 if [[ ! ${matching_ref} || ${ref} == refs/heads/master ]]; then
436 matching_ref=${ref}
321 fi 437 fi
322
323 exit 1
324 }
325 _git-r3_sub_fetch "${@}" &
326 local sub_pid=${!}
327
328 # wait for main process to terminate, either of its own
329 # or by signal from subprocess
330 wait ${main_pid}
331 local main_ret=${?}
332
333 # wait for subprocess to terminate, killing it if necessary.
334 # if main fetch finished before it, there's no point in keeping
335 # it alive. if main fetch was killed by it, it's done anyway
336 kill ${sub_pid} &>/dev/null
337 wait ${sub_pid}
338
339 # now see if subprocess wanted to tell us something...
340 if [[ -f ${T}/git-r3_want_shallow ]]; then
341 rm "${T}"/git-r3_want_shallow || die
342
343 # if fetch finished already (wasn't killed), ignore it
344 [[ ${main_ret} -eq 0 ]] && return 0
345
346 # otherwise, restart as shallow fetch
347 einfo "Restarting fetch using --depth 1 to save bandwidth ..."
348 local cmd=( git fetch --progress --depth 1 "${@}" )
349 echo "${cmd[@]}" >&2
350 "${cmd[@]}"
351 main_ret=${?}
352 fi 438 fi
439 done
353 440
354 return ${main_ret} 441 if [[ ! ${matching_ref} ]]; then
442 die "Unable to find a matching branch for remote HEAD (${head_hash})"
443 fi
444
445 echo "${matching_ref}"
355} 446}
356 447
357# @FUNCTION: git-r3_fetch 448# @FUNCTION: git-r3_fetch
358# @USAGE: [<repo-uri> [<remote-ref> [<local-id>]]] 449# @USAGE: [<repo-uri> [<remote-ref> [<local-id>]]]
359# @DESCRIPTION: 450# @DESCRIPTION:
397 fi 488 fi
398 489
399 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}} 490 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
400 local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}} 491 local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
401 local local_id=${3:-${CATEGORY}/${PN}/${SLOT%/*}} 492 local local_id=${3:-${CATEGORY}/${PN}/${SLOT%/*}}
402 local local_ref=refs/heads/${local_id}/__main__ 493 local local_ref=refs/git-r3/${local_id}/__main__
403 494
404 [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset" 495 [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
405 496
406 local -x GIT_DIR 497 local -x GIT_DIR
407 _git-r3_set_gitdir "${repos[0]}" 498 _git-r3_set_gitdir "${repos[0]}"
499
500 # prepend the local mirror if applicable
501 if [[ ${EGIT_MIRROR_URI} ]]; then
502 repos=(
503 "${EGIT_MIRROR_URI%/}/${GIT_DIR##*/}"
504 "${repos[@]}"
505 )
506 fi
408 507
409 # try to fetch from the remote 508 # try to fetch from the remote
410 local r success 509 local r success
411 for r in "${repos[@]}"; do 510 for r in "${repos[@]}"; do
511 einfo "Fetching ${r} ..."
512
513 local fetch_command=( git fetch "${r}" )
514 local clone_type=${EGIT_CLONE_TYPE}
515
516 if [[ ${r} == https://* ]] && ! has_version 'dev-vcs/git[curl]'; then
517 eerror "git-r3: fetching from https:// requested. In order to support https,"
518 eerror "dev-vcs/git needs to be built with USE=curl. Example solution:"
519 eerror
520 eerror " echo dev-vcs/git curl >> /etc/portage/package.use"
521 eerror " emerge -1v dev-vcs/git"
522 die "dev-vcs/git built with USE=curl required."
523 fi
524
525 if [[ ${r} == https://code.google.com/* ]]; then
526 # Google Code has special magic on top of git that:
527 # 1) can't handle shallow clones at all,
528 # 2) fetches duplicately when tags are pulled in with branch
529 # so automatically switch to single+tags mode.
530 if [[ ${clone_type} == shallow ]]; then
531 einfo " Google Code does not support shallow clones"
532 einfo " using EGIT_CLONE_TYPE=single+tags"
533 clone_type=single+tags
534 elif [[ ${clone_type} == single ]]; then
535 einfo " git-r3: Google Code does not send tags properly in 'single' mode"
536 einfo " using EGIT_CLONE_TYPE=single+tags"
537 clone_type=single+tags
538 fi
539 fi
540
541 if [[ ${clone_type} == mirror ]]; then
542 fetch_command+=(
543 --prune
544 # mirror the remote branches as local branches
545 "+refs/heads/*:refs/heads/*"
546 # pull tags explicitly in order to prune them properly
547 "+refs/tags/*:refs/tags/*"
548 # notes in case something needs them
549 "+refs/notes/*:refs/notes/*"
550 # and HEAD in case we need the default branch
551 # (we keep it in refs/git-r3 since otherwise --prune interferes)
552 "+HEAD:refs/git-r3/HEAD"
553 )
554 else # single or shallow
555 local fetch_l fetch_r
556
557 if [[ ${remote_ref} == HEAD ]]; then
558 # HEAD
559 fetch_l=HEAD
560 elif [[ ${remote_ref} == refs/heads/* ]]; then
561 # regular branch
562 fetch_l=${remote_ref}
563 else
564 # tag or commit...
565 # let ls-remote figure it out
566 local tagref=$(git ls-remote "${r}" "refs/tags/${remote_ref}")
567
568 # if it was a tag, ls-remote obtained a hash
569 if [[ ${tagref} ]]; then
570 # tag
571 fetch_l=refs/tags/${remote_ref}
572 else
573 # commit
574 # so we need to fetch the branch
575 if [[ ${branch} ]]; then
576 fetch_l=${branch}
577 else
578 fetch_l=HEAD
579 fi
580
581 # fetching by commit in shallow mode? can't do.
582 if [[ ${clone_type} == shallow ]]; then
583 clone_type=single
584 fi
585 fi
586 fi
587
588 if [[ ${fetch_l} == HEAD ]]; then
589 fetch_r=refs/git-r3/HEAD
590 else
591 fetch_r=${fetch_l}
592 fi
593
594 fetch_command+=(
595 "+${fetch_l}:${fetch_r}"
596 )
597
598 if [[ ${clone_type} == single+tags ]]; then
599 fetch_command+=(
600 # pull tags explicitly as requested
601 "+refs/tags/*:refs/tags/*"
602 )
603 fi
604 fi
605
606 if [[ ${clone_type} == shallow ]]; then
607 if _git-r3_is_local_repo; then
608 # '--depth 1' causes sandbox violations with local repos
609 # bug #491260
610 clone_type=single
611 elif [[ ! $(git rev-parse --quiet --verify "${fetch_r}") ]]
612 then
613 # use '--depth 1' when fetching a new branch
614 fetch_command+=( --depth 1 )
615 fi
616 else # non-shallow mode
617 if [[ -f ${GIT_DIR}/shallow ]]; then
618 fetch_command+=( --unshallow )
619 fi
620 fi
621
622 set -- "${fetch_command[@]}"
623 echo "${@}" >&2
624 if "${@}"; then
625 if [[ ${clone_type} == mirror ]]; then
626 # find remote HEAD and update our HEAD properly
627 git symbolic-ref HEAD \
628 "$(_git-r3_find_head refs/git-r3/HEAD \
629 < <(git show-ref --heads || die))" \
630 || die "Unable to update HEAD"
631 else # single or shallow
632 if [[ ${fetch_l} == HEAD ]]; then
633 # find out what branch we fetched as HEAD
634 local head_branch=$(_git-r3_find_head \
635 refs/git-r3/HEAD \
636 < <(git ls-remote --heads "${r}" || die))
637
638 # and move it to its regular place
639 git update-ref --no-deref "${head_branch}" \
640 refs/git-r3/HEAD \
641 || die "Unable to sync HEAD branch ${head_branch}"
642 git symbolic-ref HEAD "${head_branch}" \
643 || die "Unable to update HEAD"
644 fi
645 fi
646
647 # now let's see what the user wants from us
648 local full_remote_ref=$(
649 git rev-parse --verify --symbolic-full-name "${remote_ref}"
650 )
651
652 if [[ ${full_remote_ref} ]]; then
653 # when we are given a ref, create a symbolic ref
654 # so that we preserve the actual argument
655 set -- git symbolic-ref "${local_ref}" "${full_remote_ref}"
656 else
657 # otherwise, we were likely given a commit id
658 set -- git update-ref --no-deref "${local_ref}" "${remote_ref}"
659 fi
660
661 echo "${@}" >&2
662 if ! "${@}"; then
663 die "Referencing ${remote_ref} failed (wrong ref?)."
664 fi
665
666 success=1
667 break
668 fi
669 done
670 [[ ${success} ]] || die "Unable to fetch from any of EGIT_REPO_URI"
671
672 # submodules can reference commits in any branch
673 # always use the 'clone' mode to accomodate that, bug #503332
674 local EGIT_CLONE_TYPE=mirror
675
676 # recursively fetch submodules
677 if git cat-file -e "${local_ref}":.gitmodules &>/dev/null; then
678 local submodules
679 _git-r3_set_submodules \
680 "$(git cat-file -p "${local_ref}":.gitmodules || die)"
681
682 while [[ ${submodules[@]} ]]; do
683 local subname=${submodules[0]}
684 local url=${submodules[1]}
685 local path=${submodules[2]}
686 local commit=$(git rev-parse "${local_ref}:${path}")
687
688 if [[ ! ${commit} ]]; then
689 die "Unable to get commit id for submodule ${subname}"
690 fi
691
692 local subrepos
693 _git-r3_set_subrepos "${url}" "${repos[@]}"
694
695 git-r3_fetch "${subrepos[*]}" "${commit}" "${local_id}/${subname}"
696
697 submodules=( "${submodules[@]:3}" ) # shift
698 done
699 fi
700}
701
702# @FUNCTION: git-r3_checkout
703# @USAGE: [<repo-uri> [<checkout-path> [<local-id>]]]
704# @DESCRIPTION:
705# Check the previously fetched tree to the working copy.
706#
707# <repo-uri> specifies the repository URIs, as a space-separated list.
708# The first URI will be used as repository group identifier
709# and therefore must be used consistently with git-r3_fetch.
710# The remaining URIs are not used and therefore may be omitted.
711# When not specified, defaults to ${EGIT_REPO_URI}.
712#
713# <checkout-path> specifies the path to place the checkout. It defaults
714# to ${EGIT_CHECKOUT_DIR} if set, otherwise to ${WORKDIR}/${P}.
715#
716# <local-id> needs to specify the local identifier that was used
717# for respective git-r3_fetch.
718#
719# The checkout operation will write to the working copy, and export
720# the repository state into the environment. If the repository contains
721# submodules, they will be checked out recursively.
722git-r3_checkout() {
723 debug-print-function ${FUNCNAME} "$@"
724
725 local repos
726 if [[ ${1} ]]; then
727 repos=( ${1} )
728 elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
729 repos=( "${EGIT_REPO_URI[@]}" )
730 else
731 repos=( ${EGIT_REPO_URI} )
732 fi
733
734 local out_dir=${2:-${EGIT_CHECKOUT_DIR:-${WORKDIR}/${P}}}
735 local local_id=${3:-${CATEGORY}/${PN}/${SLOT%/*}}
736
737 local -x GIT_DIR
738 _git-r3_set_gitdir "${repos[0]}"
739
740 einfo "Checking out ${repos[0]} to ${out_dir} ..."
741
742 if ! git cat-file -e refs/git-r3/"${local_id}"/__main__; then
743 if [[ ${EVCS_OFFLINE} ]]; then
744 die "No local clone of ${repos[0]}. Unable to work with EVCS_OFFLINE."
745 else
746 die "Logic error: no local clone of ${repos[0]}. git-r3_fetch not used?"
747 fi
748 fi
749 local remote_ref=$(
750 git symbolic-ref --quiet refs/git-r3/"${local_id}"/__main__
751 )
752 local new_commit_id=$(
753 git rev-parse --verify refs/git-r3/"${local_id}"/__main__
754 )
755
756 git-r3_sub_checkout() {
757 local orig_repo=${GIT_DIR}
758 local -x GIT_DIR=${out_dir}/.git
759 local -x GIT_WORK_TREE=${out_dir}
760
761 mkdir -p "${out_dir}" || die
762
763 # use git init+fetch instead of clone since the latter doesn't like
764 # non-empty directories.
765
766 git init --quiet || die
767 # setup 'alternates' to avoid copying objects
768 echo "${orig_repo}/objects" > "${GIT_DIR}"/objects/info/alternates || die
769 # now copy the refs
770 # [htn]* safely catches heads, tags, notes without complaining
771 # on non-existing ones, and omits internal 'git-r3' ref
772 cp -R "${orig_repo}"/refs/[htn]* "${GIT_DIR}"/refs/ || die
773
774 # (no need to copy HEAD, we will set it via checkout)
775
776 if [[ -f ${orig_repo}/shallow ]]; then
777 cp "${orig_repo}"/shallow "${GIT_DIR}"/ || die
778 fi
779
780 set -- git checkout --quiet
781 if [[ ${remote_ref} ]]; then
782 set -- "${@}" "${remote_ref#refs/heads/}"
783 else
784 set -- "${@}" "${new_commit_id}"
785 fi
786 echo "${@}" >&2
787 "${@}" || die "git checkout ${remote_ref:-${new_commit_id}} failed"
788 }
789 git-r3_sub_checkout
790
791 local old_commit_id=$(
792 git rev-parse --quiet --verify refs/git-r3/"${local_id}"/__old__
793 )
794 if [[ ! ${old_commit_id} ]]; then
795 echo "GIT NEW branch -->"
796 echo " repository: ${repos[0]}"
797 echo " at the commit: ${new_commit_id}"
798 else
799 # diff against previous revision
800 echo "GIT update -->"
801 echo " repository: ${repos[0]}"
802 # write out message based on the revisions
803 if [[ "${old_commit_id}" != "${new_commit_id}" ]]; then
804 echo " updating from commit: ${old_commit_id}"
805 echo " to commit: ${new_commit_id}"
806
807 git --no-pager diff --stat \
808 ${old_commit_id}..${new_commit_id}
809 else
810 echo " at the commit: ${new_commit_id}"
811 fi
812 fi
813 git update-ref --no-deref refs/git-r3/"${local_id}"/{__old__,__main__} || die
814
815 # recursively checkout submodules
816 if [[ -f ${out_dir}/.gitmodules ]]; then
817 local submodules
818 _git-r3_set_submodules \
819 "$(<"${out_dir}"/.gitmodules)"
820
821 while [[ ${submodules[@]} ]]; do
822 local subname=${submodules[0]}
823 local url=${submodules[1]}
824 local path=${submodules[2]}
825 local subrepos
826 _git-r3_set_subrepos "${url}" "${repos[@]}"
827
828 git-r3_checkout "${subrepos[*]}" "${out_dir}/${path}" \
829 "${local_id}/${subname}"
830
831 submodules=( "${submodules[@]:3}" ) # shift
832 done
833 fi
834
835 # keep this *after* submodules
836 export EGIT_DIR=${GIT_DIR}
837 export EGIT_VERSION=${new_commit_id}
838}
839
840# @FUNCTION: git-r3_peek_remote_ref
841# @USAGE: [<repo-uri> [<remote-ref>]]
842# @DESCRIPTION:
843# Peek the reference in the remote repository and print the matching
844# (newest) commit SHA1.
845#
846# <repo-uri> specifies the repository URIs to fetch from, as a space-
847# -separated list. When not specified, defaults to ${EGIT_REPO_URI}.
848#
849# <remote-ref> specifies the remote ref to peek. It is preferred to use
850# 'refs/heads/<branch-name>' for branches and 'refs/tags/<tag-name>'
851# for tags. Alternatively, 'HEAD' may be used for upstream default
852# branch. Defaults to the first of EGIT_COMMIT, EGIT_BRANCH or literal
853# 'HEAD' that is set to a non-null value.
854#
855# The operation will be done purely on the remote, without using local
856# storage. If commit SHA1 is provided as <remote-ref>, the function will
857# fail due to limitations of git protocol.
858#
859# On success, the function returns 0 and writes hexadecimal commit SHA1
860# to stdout. On failure, the function returns 1.
861git-r3_peek_remote_ref() {
862 debug-print-function ${FUNCNAME} "$@"
863
864 local repos
865 if [[ ${1} ]]; then
866 repos=( ${1} )
867 elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
868 repos=( "${EGIT_REPO_URI[@]}" )
869 else
870 repos=( ${EGIT_REPO_URI} )
871 fi
872
873 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
874 local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
875
876 [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
877
878 local r success
879 for r in "${repos[@]}"; do
412 einfo "Fetching ${remote_ref} from ${r} ..." 880 einfo "Peeking ${remote_ref} on ${r} ..." >&2
413 881
414 local is_branch lookup_ref 882 local is_branch lookup_ref
415 if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]] 883 if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]]
416 then 884 then
417 is_branch=1 885 is_branch=1
420 # ls-remote by commit is going to fail anyway, 888 # ls-remote by commit is going to fail anyway,
421 # so we may as well pass refs/tags/ABCDEF... 889 # so we may as well pass refs/tags/ABCDEF...
422 lookup_ref=refs/tags/${remote_ref} 890 lookup_ref=refs/tags/${remote_ref}
423 fi 891 fi
424 892
425 # first, try ls-remote to see if ${remote_ref} is a real ref
426 # and not a commit id. if it succeeds, we can pass ${remote_ref}
427 # to 'fetch'. otherwise, we will just fetch everything
428
429 # split on whitespace
430 local ref=(
431 $(git ls-remote "${r}" "${lookup_ref}" || echo __FAIL__)
432 )
433
434 # normally, ref[0] is a hash, so we can do magic strings here
435 [[ ${ref[0]} == __FAIL__ ]] && continue
436
437 local nonshallow=${EGIT_NONSHALLOW}
438 local ref_param=()
439 if [[ ! ${ref[0]} ]]; then
440 nonshallow=1
441 fi
442
443 # 1. if we need a non-shallow clone and we have a shallow one,
444 # we need to unshallow it explicitly.
445 # 2. if we want a shallow clone, we just pass '--depth 1'
446 # to the first fetch in the repo. passing '--depth'
447 # to further requests usually results in more data being
448 # downloaded than without it.
449 # 3. if we update a shallow clone, we try without '--depth'
450 # first since that usually transfers less data. however,
451 # we use git-r3_smart_fetch that can switch into '--depth 1'
452 # if that looks beneficial.
453
454 local fetch_command=( git fetch )
455 if [[ ${nonshallow} ]]; then
456 if [[ -f ${GIT_DIR}/shallow ]]; then
457 ref_param+=( --unshallow )
458 fi
459 # fetch all branches
460 ref_param+=( "refs/heads/*:refs/remotes/origin/*" )
461 else
462 # 'git show-ref --heads' returns 1 when there are no branches
463 if ! git show-ref --heads -q; then
464 ref_param+=( --depth 1 )
465 else
466 fetch_command=( _git-r3_smart_fetch )
467 fi
468 fi
469
470 # now, another important thing. we may only fetch a remote
471 # branch directly to a local branch. Otherwise, we need to fetch
472 # the commit and re-create the branch on top of it.
473
474 if [[ ${ref[0]} ]]; then
475 if [[ ${is_branch} ]]; then
476 ref_param+=( -f "${remote_ref}:${local_id}/__main__" )
477 else
478 ref_param+=( "refs/tags/${remote_ref}" )
479 fi
480 fi
481
482 # if ${remote_ref} is branch or tag, ${ref[@]} will contain
483 # the respective commit id. otherwise, it will be an empty
484 # array, so the following won't evaluate to a parameter.
485 set -- "${fetch_command[@]}" --no-tags "${r}" "${ref_param[@]}"
486 echo "${@}" >&2
487 if "${@}"; then
488 if [[ ! ${is_branch} ]]; then
489 set -- git branch -f "${local_id}/__main__" \
490 "${ref[0]:-${remote_ref}}"
491 echo "${@}" >&2
492 if ! "${@}"; then
493 die "Creating branch for ${remote_ref} failed (wrong ref?)."
494 fi
495 fi
496
497 success=1
498 break
499 fi
500 done
501 [[ ${success} ]] || die "Unable to fetch from any of EGIT_REPO_URI"
502
503 # recursively fetch submodules
504 if git cat-file -e "${local_ref}":.gitmodules &>/dev/null; then
505 local submodules
506 _git-r3_set_submodules \
507 "$(git cat-file -p "${local_ref}":.gitmodules || die)"
508
509 while [[ ${submodules[@]} ]]; do
510 local subname=${submodules[0]}
511 local url=${submodules[1]}
512 local path=${submodules[2]}
513 local commit=$(git rev-parse "${local_ref}:${path}")
514
515 if [[ ! ${commit} ]]; then
516 die "Unable to get commit id for submodule ${subname}"
517 fi
518 if [[ ${url} == ./* || ${url} == ../* ]]; then
519 local subrepos=( "${repos[@]/%//${url}}" )
520 else
521 local subrepos=( "${url}" )
522 fi
523
524 git-r3_fetch "${subrepos[*]}" "${commit}" "${local_id}/${subname}"
525
526 submodules=( "${submodules[@]:3}" ) # shift
527 done
528 fi
529}
530
531# @FUNCTION: git-r3_checkout
532# @USAGE: [<repo-uri> [<checkout-path> [<local-id>]]]
533# @DESCRIPTION:
534# Check the previously fetched tree to the working copy.
535#
536# <repo-uri> specifies the repository URIs, as a space-separated list.
537# The first URI will be used as repository group identifier
538# and therefore must be used consistently with git-r3_fetch.
539# The remaining URIs are not used and therefore may be omitted.
540# When not specified, defaults to ${EGIT_REPO_URI}.
541#
542# <checkout-path> specifies the path to place the checkout. It defaults
543# to ${EGIT_CHECKOUT_DIR} if set, otherwise to ${WORKDIR}/${P}.
544#
545# <local-id> needs to specify the local identifier that was used
546# for respective git-r3_fetch.
547#
548# The checkout operation will write to the working copy, and export
549# the repository state into the environment. If the repository contains
550# submodules, they will be checked out recursively.
551git-r3_checkout() {
552 debug-print-function ${FUNCNAME} "$@"
553
554 local repos
555 if [[ ${1} ]]; then
556 repos=( ${1} )
557 elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
558 repos=( "${EGIT_REPO_URI[@]}" )
559 else
560 repos=( ${EGIT_REPO_URI} )
561 fi
562
563 local out_dir=${2:-${EGIT_CHECKOUT_DIR:-${WORKDIR}/${P}}}
564 local local_id=${3:-${CATEGORY}/${PN}/${SLOT%/*}}
565
566 local -x GIT_DIR GIT_WORK_TREE
567 _git-r3_set_gitdir "${repos[0]}"
568 GIT_WORK_TREE=${out_dir}
569 mkdir -p "${GIT_WORK_TREE}" || die
570
571 einfo "Checking out ${repos[0]} to ${out_dir} ..."
572
573 if ! git cat-file -e refs/heads/"${local_id}"/__main__
574 then
575 if [[ ${EVCS_OFFLINE} ]]; then
576 die "No local clone of ${repos[0]}. Unable to work with EVCS_OFFLINE."
577 else
578 die "Logic error: no local clone of ${repos[0]}. git-r3_fetch not used?"
579 fi
580 fi
581
582 set -- git checkout -f "${local_id}"/__main__ .
583 echo "${@}" >&2
584 "${@}" || die "git checkout ${local_id}/__main__ failed"
585
586 # diff against previous revision (if any)
587 local new_commit_id=$(git rev-parse --verify "${local_id}"/__main__)
588 local old_commit_id=$(
589 git rev-parse --verify "${local_id}"/__old__ 2>/dev/null
590 )
591
592 if [[ ! ${old_commit_id} ]]; then
593 echo "GIT NEW branch -->"
594 echo " repository: ${repos[0]}"
595 echo " at the commit: ${new_commit_id}"
596 else
597 echo "GIT update -->"
598 echo " repository: ${repos[0]}"
599 # write out message based on the revisions
600 if [[ "${old_commit_id}" != "${new_commit_id}" ]]; then
601 echo " updating from commit: ${old_commit_id}"
602 echo " to commit: ${new_commit_id}"
603
604 git --no-pager diff --stat \
605 ${old_commit_id}..${new_commit_id}
606 else
607 echo " at the commit: ${new_commit_id}"
608 fi
609 fi
610 git branch -f "${local_id}"/{__old__,__main__} || die
611
612 # recursively checkout submodules
613 if [[ -f ${GIT_WORK_TREE}/.gitmodules ]]; then
614 local submodules
615 _git-r3_set_submodules \
616 "$(<"${GIT_WORK_TREE}"/.gitmodules)"
617
618 while [[ ${submodules[@]} ]]; do
619 local subname=${submodules[0]}
620 local url=${submodules[1]}
621 local path=${submodules[2]}
622
623 if [[ ${url} == ./* || ${url} == ../* ]]; then
624 url=${repos[0]%%/}/${url}
625 fi
626
627 git-r3_checkout "${url}" "${GIT_WORK_TREE}/${path}" \
628 "${local_id}/${subname}"
629
630 submodules=( "${submodules[@]:3}" ) # shift
631 done
632 fi
633
634 # keep this *after* submodules
635 export EGIT_DIR=${GIT_DIR}
636 export EGIT_VERSION=${new_commit_id}
637
638 # create a fake '.git' directory to satisfy 'git rev-parse HEAD'
639 GIT_DIR=${GIT_WORK_TREE}/.git
640 git init || die
641 echo "${EGIT_VERSION}" > "${GIT_WORK_TREE}"/.git/HEAD || die
642}
643
644# @FUNCTION: git-r3_peek_remote_ref
645# @USAGE: [<repo-uri> [<remote-ref>]]
646# @DESCRIPTION:
647# Peek the reference in the remote repository and print the matching
648# (newest) commit SHA1.
649#
650# <repo-uri> specifies the repository URIs to fetch from, as a space-
651# -separated list. When not specified, defaults to ${EGIT_REPO_URI}.
652#
653# <remote-ref> specifies the remote ref to peek. It is preferred to use
654# 'refs/heads/<branch-name>' for branches and 'refs/tags/<tag-name>'
655# for tags. Alternatively, 'HEAD' may be used for upstream default
656# branch. Defaults to the first of EGIT_COMMIT, EGIT_BRANCH or literal
657# 'HEAD' that is set to a non-null value.
658#
659# The operation will be done purely on the remote, without using local
660# storage. If commit SHA1 is provided as <remote-ref>, the function will
661# fail due to limitations of git protocol.
662#
663# On success, the function returns 0 and writes hexadecimal commit SHA1
664# to stdout. On failure, the function returns 1.
665git-r3_peek_remote_ref() {
666 debug-print-function ${FUNCNAME} "$@"
667
668 local repos
669 if [[ ${1} ]]; then
670 repos=( ${1} )
671 elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
672 repos=( "${EGIT_REPO_URI[@]}" )
673 else
674 repos=( ${EGIT_REPO_URI} )
675 fi
676
677 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
678 local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
679
680 [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
681
682 local r success
683 for r in "${repos[@]}"; do
684 einfo "Peeking ${remote_ref} on ${r} ..." >&2
685
686 local is_branch lookup_ref
687 if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]]
688 then
689 is_branch=1
690 lookup_ref=${remote_ref}
691 else
692 # ls-remote by commit is going to fail anyway,
693 # so we may as well pass refs/tags/ABCDEF...
694 lookup_ref=refs/tags/${remote_ref}
695 fi
696
697 # split on whitespace 893 # split on whitespace
698 local ref=( 894 local ref=(
699 $(git ls-remote "${r}" "${lookup_ref}") 895 $(git ls-remote "${r}" "${lookup_ref}")
700 ) 896 )
701 897

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