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Revision 1.4 - (show annotations) (download)
Fri Sep 13 15:04:36 2013 UTC (10 months, 2 weeks ago) by mgorny
Branch: MAIN
Changes since 1.3: +4 -3 lines
Do not leak EGIT_NONSHALLOW over loop iterations. Failing URL may cause non-shallow attempt to be made. When attempting next URL in the list, we should try shallow again.

1 # Copyright 1999-2013 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/git-r3.eclass,v 1.3 2013/09/09 16:01:17 mgorny Exp $
4
5 # @ECLASS: git-r3.eclass
6 # @MAINTAINER:
7 # Michał Górny <mgorny@gentoo.org>
8 # @BLURB: Eclass for fetching and unpacking git repositories.
9 # @DESCRIPTION:
10 # Third generation eclass for easing maitenance of live ebuilds using
11 # git as remote repository. The eclass supports lightweight (shallow)
12 # clones and bare clones of submodules.
13
14 case "${EAPI:-0}" in
15 0|1|2|3|4|5)
16 ;;
17 *)
18 die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
19 ;;
20 esac
21
22 if [[ ! ${_GIT_R3} ]]; then
23
24 inherit eutils
25
26 fi
27
28 EXPORT_FUNCTIONS src_unpack
29
30 if [[ ! ${_GIT_R3} ]]; then
31
32 # @ECLASS-VARIABLE: EGIT3_STORE_DIR
33 # @DESCRIPTION:
34 # Storage directory for git sources.
35 #
36 # EGIT3_STORE_DIR=${DISTDIR}/git3-src
37
38 # @ECLASS-VARIABLE: EGIT_REPO_URI
39 # @REQUIRED
40 # @DESCRIPTION:
41 # URIs to the repository, e.g. git://foo, https://foo. If multiple URIs
42 # are provided, the eclass will consider them as fallback URIs to try
43 # if the first URI does not work.
44 #
45 # It can be overriden via env using ${PN}_LIVE_REPO variable.
46 #
47 # Example:
48 # @CODE
49 # EGIT_REPO_URI="git://a/b.git https://c/d.git"
50 # @CODE
51
52 # @ECLASS-VARIABLE: EVCS_OFFLINE
53 # @DEFAULT_UNSET
54 # @DESCRIPTION:
55 # If non-empty, this variable prevents any online operations.
56
57 # @ECLASS-VARIABLE: EGIT_BRANCH
58 # @DEFAULT_UNSET
59 # @DESCRIPTION:
60 # The branch name to check out. If unset, the upstream default (HEAD)
61 # will be used.
62 #
63 # It can be overriden via env using ${PN}_LIVE_BRANCH variable.
64
65 # @ECLASS-VARIABLE: EGIT_COMMIT
66 # @DEFAULT_UNSET
67 # @DESCRIPTION:
68 # The tag name or commit identifier to check out. If unset, newest
69 # commit from the branch will be used. If set, EGIT_BRANCH will
70 # be ignored.
71 #
72 # It can be overriden via env using ${PN}_LIVE_COMMIT variable.
73
74 # @ECLASS-VARIABLE: EGIT_CHECKOUT_DIR
75 # @DESCRIPTION:
76 # The directory to check the git sources out to.
77 #
78 # EGIT_CHECKOUT_DIR=${WORKDIR}/${P}
79
80 # @ECLASS-VARIABLE: EGIT_NONSHALLOW
81 # @DEFAULT_UNSET
82 # @DESCRIPTION:
83 # Disable performing shallow fetches/clones. Shallow clones have
84 # a fair number of limitations. Therefore, if you'd like the eclass to
85 # perform complete clones instead, set this to a non-null value.
86 #
87 # This variable is to be set in make.conf. Ebuilds are not allowed
88 # to set it.
89
90 # @FUNCTION: _git-r3_env_setup
91 # @INTERNAL
92 # @DESCRIPTION:
93 # Set the eclass variables as necessary for operation. This can involve
94 # setting EGIT_* to defaults or ${PN}_LIVE_* variables.
95 _git-r3_env_setup() {
96 debug-print-function ${FUNCNAME} "$@"
97
98 local esc_pn livevar
99 esc_pn=${PN//[-+]/_}
100
101 livevar=${esc_pn}_LIVE_REPO
102 EGIT_REPO_URI=${!livevar:-${EGIT_REPO_URI}}
103 [[ ${!livevar} ]] \
104 && ewarn "Using ${livevar}, no support will be provided"
105
106 livevar=${esc_pn}_LIVE_BRANCH
107 EGIT_BRANCH=${!livevar:-${EGIT_BRANCH}}
108 [[ ${!livevar} ]] \
109 && ewarn "Using ${livevar}, no support will be provided"
110
111 livevar=${esc_pn}_LIVE_COMMIT
112 EGIT_COMMIT=${!livevar:-${EGIT_COMMIT}}
113 [[ ${!livevar} ]] \
114 && ewarn "Using ${livevar}, no support will be provided"
115
116 # Migration helpers. Remove them when git-2 is removed.
117
118 if [[ ${EGIT_SOURCEDIR} ]]; then
119 eerror "EGIT_SOURCEDIR has been replaced by EGIT_CHECKOUT_DIR. While updating"
120 eerror "your ebuild, please check whether the variable is necessary at all"
121 eerror "since the default has been changed from \${S} to \${WORKDIR}/\${P}."
122 eerror "Therefore, proper setting of S may be sufficient."
123 die "EGIT_SOURCEDIR has been replaced by EGIT_CHECKOUT_DIR."
124 fi
125
126 if [[ ${EGIT_MASTER} ]]; then
127 eerror "EGIT_MASTER has been removed. Instead, the upstream default (HEAD)"
128 eerror "is used by the eclass. Please remove the assignment or use EGIT_BRANCH"
129 eerror "as necessary."
130 die "EGIT_MASTER has been removed."
131 fi
132
133 if [[ ${EGIT_HAS_SUBMODULES} ]]; then
134 eerror "EGIT_HAS_SUBMODULES has been removed. The eclass no longer needs"
135 eerror "to switch the clone type in order to support submodules and therefore"
136 eerror "submodules are detected and fetched automatically."
137 die "EGIT_HAS_SUBMODULES is no longer necessary."
138 fi
139
140 if [[ ${EGIT_PROJECT} ]]; then
141 eerror "EGIT_PROJECT has been removed. Instead, the eclass determines"
142 eerror "the local clone path using path in canonical EGIT_REPO_URI."
143 eerror "If the current algorithm causes issues for you, please report a bug."
144 die "EGIT_PROJECT is no longer necessary."
145 fi
146
147 if [[ ${EGIT_BOOTSTRAP} ]]; then
148 eerror "EGIT_BOOTSTRAP has been removed. Please create proper src_prepare()"
149 eerror "instead."
150 die "EGIT_BOOTSTRAP has been removed."
151 fi
152
153 if [[ ${EGIT_NOUNPACK} ]]; then
154 eerror "EGIT_NOUNPACK has been removed. The eclass no longer calls default"
155 eerror "unpack function. If necessary, please declare proper src_unpack()."
156 die "EGIT_NOUNPACK has been removed."
157 fi
158 }
159
160 # @FUNCTION: _git-r3_set_gitdir
161 # @USAGE: <repo-uri>
162 # @INTERNAL
163 # @DESCRIPTION:
164 # Obtain the local repository path and set it as GIT_DIR. Creates
165 # a new repository if necessary.
166 #
167 # <repo-uri> may be used to compose the path. It should therefore be
168 # a canonical URI to the repository.
169 _git-r3_set_gitdir() {
170 debug-print-function ${FUNCNAME} "$@"
171
172 local repo_name=${1#*://*/}
173
174 # strip common prefixes to make paths more likely to match
175 # e.g. git://X/Y.git vs https://X/git/Y.git
176 # (but just one of the prefixes)
177 case "${repo_name}" in
178 # cgit can proxy requests to git
179 cgit/*) repo_name=${repo_name#cgit/};;
180 # pretty common
181 git/*) repo_name=${repo_name#git/};;
182 # gentoo.org
183 gitroot/*) repo_name=${repo_name#gitroot/};;
184 # google code, sourceforge
185 p/*) repo_name=${repo_name#p/};;
186 # kernel.org
187 pub/scm/*) repo_name=${repo_name#pub/scm/};;
188 esac
189 # ensure a .git suffix, same reason
190 repo_name=${repo_name%.git}.git
191 # now replace all the slashes
192 repo_name=${repo_name//\//_}
193
194 local distdir=${PORTAGE_ACTUAL_DISTDIR:-${DISTDIR}}
195 : ${EGIT3_STORE_DIR:=${distdir}/git3-src}
196
197 GIT_DIR=${EGIT3_STORE_DIR}/${repo_name}
198
199 if [[ ! -d ${EGIT3_STORE_DIR} ]]; then
200 (
201 addwrite /
202 mkdir -m0755 -p "${EGIT3_STORE_DIR}"
203 ) || die "Unable to create ${EGIT3_STORE_DIR}"
204 fi
205
206 addwrite "${EGIT3_STORE_DIR}"
207 if [[ ! -d ${GIT_DIR} ]]; then
208 mkdir "${GIT_DIR}" || die
209 git init --bare || die
210
211 # avoid auto-unshallow :)
212 touch "${GIT_DIR}"/shallow || die
213 fi
214 }
215
216 # @FUNCTION: _git-r3_set_submodules
217 # @USAGE: <file-contents>
218 # @INTERNAL
219 # @DESCRIPTION:
220 # Parse .gitmodules contents passed as <file-contents>
221 # as in "$(cat .gitmodules)"). Composes a 'submodules' array that
222 # contains in order (name, URL, path) for each submodule.
223 _git-r3_set_submodules() {
224 debug-print-function ${FUNCNAME} "$@"
225
226 local data=${1}
227
228 # ( name url path ... )
229 submodules=()
230
231 local l
232 while read l; do
233 # submodule.<path>.path=<path>
234 # submodule.<path>.url=<url>
235 [[ ${l} == submodule.*.url=* ]] || continue
236
237 l=${l#submodule.}
238 local subname=${l%%.url=*}
239
240 submodules+=(
241 "${subname}"
242 "$(echo "${data}" | git config -f /dev/fd/0 \
243 submodule."${subname}".url)"
244 "$(echo "${data}" | git config -f /dev/fd/0 \
245 submodule."${subname}".path)"
246 )
247 done < <(echo "${data}" | git config -f /dev/fd/0 -l)
248 }
249
250 # @FUNCTION: _git-r3_smart_fetch
251 # @USAGE: <git-fetch-args>...
252 # @DESCRIPTION:
253 # Try fetching without '--depth' and switch to '--depth 1' if that
254 # will involve less objects fetched.
255 _git-r3_smart_fetch() {
256 debug-print-function ${FUNCNAME} "$@"
257
258 local sed_regexp='.*Counting objects: \([0-9]*\), done\..*'
259
260 # start the main fetch
261 local cmd=( git fetch --progress "${@}" )
262 echo "${cmd[@]}" >&2
263
264 # we copy the output to the 'sed' pipe for parsing. whenever sed finds
265 # the process count, it quits quickly to avoid delays in writing it.
266 # then, we start a dummy 'cat' to keep the pipe alive
267
268 "${cmd[@]}" 2>&1 \
269 | tee >(
270 sed -n -e "/${sed_regexp}/{s/${sed_regexp}/\1/p;q}" \
271 > "${T}"/git-r3_main.count
272 exec cat >/dev/null
273 ) &
274 local main_pid=${!}
275
276 # start the helper process
277 _git-r3_sub_fetch() {
278 # wait for main fetch to get object count; if the server doesn't
279 # output it, we won't even launch the parallel process
280 while [[ ! -s ${T}/git-r3_main.count ]]; do
281 sleep 0.25
282 done
283
284 # ok, let's see if parallel fetch gives us smaller count
285 # --dry-run will prevent it from writing to the local clone
286 # and sed should terminate git with SIGPIPE
287 local sub_count=$(git fetch --progress --dry-run --depth 1 "${@}" 2>&1 \
288 | sed -n -e "/${sed_regexp}/{s/${sed_regexp}/\1/p;q}")
289 local main_count=$(<"${T}"/git-r3_main.count)
290
291 # let's be real sure that '--depth 1' will be good for us.
292 # note that we have purely objects counts, and '--depth 1'
293 # may involve much bigger objects
294 if [[ ${main_count} && ${main_count} -ge $(( sub_count * 3/2 )) ]]
295 then
296 # signal that we want shallow fetch instead,
297 # and terminate the non-shallow fetch process
298 touch "${T}"/git-r3_want_shallow || die
299 kill ${main_pid} &>/dev/null
300 exit 0
301 fi
302
303 exit 1
304 }
305 _git-r3_sub_fetch "${@}" &
306 local sub_pid=${!}
307
308 # wait for main process to terminate, either of its own
309 # or by signal from subprocess
310 wait ${main_pid}
311 local main_ret=${?}
312
313 # wait for subprocess to terminate, killing it if necessary.
314 # if main fetch finished before it, there's no point in keeping
315 # it alive. if main fetch was killed by it, it's done anyway
316 kill ${sub_pid} &>/dev/null
317 wait ${sub_pid}
318
319 # now see if subprocess wanted to tell us something...
320 if [[ -f ${T}/git-r3_want_shallow ]]; then
321 rm "${T}"/git-r3_want_shallow || die
322
323 # if fetch finished already (wasn't killed), ignore it
324 [[ ${main_ret} -eq 0 ]] && return 0
325
326 # otherwise, restart as shallow fetch
327 einfo "Restarting fetch using --depth 1 to save bandwidth ..."
328 local cmd=( git fetch --progress --depth 1 "${@}" )
329 echo "${cmd[@]}" >&2
330 "${cmd[@]}"
331 main_ret=${?}
332 fi
333
334 return ${main_ret}
335 }
336
337 # @FUNCTION: git-r3_fetch
338 # @USAGE: [<repo-uri> [<remote-ref> [<local-id>]]]
339 # @DESCRIPTION:
340 # Fetch new commits to the local clone of repository.
341 #
342 # <repo-uri> specifies the repository URIs to fetch from, as a space-
343 # -separated list. The first URI will be used as repository group
344 # identifier and therefore must be used consistently. When not
345 # specified, defaults to ${EGIT_REPO_URI}.
346 #
347 # <remote-ref> specifies the remote ref or commit id to fetch.
348 # It is preferred to use 'refs/heads/<branch-name>' for branches
349 # and 'refs/tags/<tag-name>' for tags. Other options are 'HEAD'
350 # for upstream default branch and hexadecimal commit SHA1. Defaults
351 # to the first of EGIT_COMMIT, EGIT_BRANCH or literal 'HEAD' that
352 # is set to a non-null value.
353 #
354 # <local-id> specifies the local branch identifier that will be used to
355 # locally store the fetch result. It should be unique to multiple
356 # fetches within the repository that can be performed at the same time
357 # (including parallel merges). It defaults to ${CATEGORY}/${PN}/${SLOT}.
358 # This default should be fine unless you are fetching multiple trees
359 # from the same repository in the same ebuild.
360 #
361 # The fetch operation will affect the EGIT_STORE only. It will not touch
362 # the working copy, nor export any environment variables.
363 # If the repository contains submodules, they will be fetched
364 # recursively.
365 git-r3_fetch() {
366 debug-print-function ${FUNCNAME} "$@"
367
368 local repos=( ${1:-${EGIT_REPO_URI}} )
369 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
370 local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
371 local local_id=${3:-${CATEGORY}/${PN}/${SLOT}}
372 local local_ref=refs/heads/${local_id}/__main__
373
374 [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
375
376 local -x GIT_DIR
377 _git-r3_set_gitdir ${repos[0]}
378
379 # try to fetch from the remote
380 local r success
381 for r in ${repos[@]}; do
382 einfo "Fetching ${remote_ref} from ${r} ..."
383
384 local is_branch lookup_ref
385 if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]]
386 then
387 is_branch=1
388 lookup_ref=${remote_ref}
389 else
390 # ls-remote by commit is going to fail anyway,
391 # so we may as well pass refs/tags/ABCDEF...
392 lookup_ref=refs/tags/${remote_ref}
393 fi
394
395 # first, try ls-remote to see if ${remote_ref} is a real ref
396 # and not a commit id. if it succeeds, we can pass ${remote_ref}
397 # to 'fetch'. otherwise, we will just fetch everything
398
399 # split on whitespace
400 local ref=(
401 $(git ls-remote "${r}" "${lookup_ref}")
402 )
403
404 local nonshallow=${EGIT_NONSHALLOW}
405 local ref_param=()
406 if [[ ! ${ref[0]} ]]; then
407 nonshallow=1
408 fi
409
410 # 1. if we need a non-shallow clone and we have a shallow one,
411 # we need to unshallow it explicitly.
412 # 2. if we want a shallow clone, we just pass '--depth 1'
413 # to the first fetch in the repo. passing '--depth'
414 # to further requests usually results in more data being
415 # downloaded than without it.
416 # 3. if we update a shallow clone, we try without '--depth'
417 # first since that usually transfers less data. however,
418 # we use git-r3_smart_fetch that can switch into '--depth 1'
419 # if that looks beneficial.
420
421 local fetch_command=( git fetch )
422 if [[ ${nonshallow} ]]; then
423 if [[ -f ${GIT_DIR}/shallow ]]; then
424 ref_param+=( --unshallow )
425 fi
426 else
427 # 'git show-ref --heads' returns 1 when there are no branches
428 if ! git show-ref --heads -q; then
429 ref_param+=( --depth 1 )
430 else
431 fetch_command=( _git-r3_smart_fetch )
432 fi
433 fi
434
435 # now, another important thing. we may only fetch a remote
436 # branch directly to a local branch. Otherwise, we need to fetch
437 # the commit and re-create the branch on top of it.
438
439 if [[ ${ref[0]} ]]; then
440 if [[ ${is_branch} ]]; then
441 ref_param+=( -f "${remote_ref}:${local_id}/__main__" )
442 else
443 ref_param+=( "refs/tags/${remote_ref}" )
444 fi
445 fi
446
447 # if ${remote_ref} is branch or tag, ${ref[@]} will contain
448 # the respective commit id. otherwise, it will be an empty
449 # array, so the following won't evaluate to a parameter.
450 set -- "${fetch_command[@]}" --no-tags "${r}" "${ref_param[@]}"
451 echo "${@}" >&2
452 if "${@}"; then
453 if [[ ! ${is_branch} ]]; then
454 set -- git branch -f "${local_id}/__main__" \
455 "${ref[0]:-${remote_ref}}"
456 echo "${@}" >&2
457 if ! "${@}"; then
458 die "Creating branch for ${remote_ref} failed (wrong ref?)."
459 fi
460 fi
461
462 success=1
463 break
464 fi
465 done
466 [[ ${success} ]] || die "Unable to fetch from any of EGIT_REPO_URI"
467
468 # recursively fetch submodules
469 if git cat-file -e "${local_ref}":.gitmodules &>/dev/null; then
470 local submodules
471 _git-r3_set_submodules \
472 "$(git cat-file -p "${local_ref}":.gitmodules || die)"
473
474 while [[ ${submodules[@]} ]]; do
475 local subname=${submodules[0]}
476 local url=${submodules[1]}
477 local path=${submodules[2]}
478 local commit=$(git rev-parse "${local_ref}:${path}")
479
480 if [[ ! ${commit} ]]; then
481 die "Unable to get commit id for submodule ${subname}"
482 fi
483
484 git-r3_fetch "${url}" "${commit}" "${local_id}/${subname}"
485
486 submodules=( "${submodules[@]:3}" ) # shift
487 done
488 fi
489 }
490
491 # @FUNCTION: git-r3_checkout
492 # @USAGE: [<repo-uri> [<checkout-path> [<local-id>]]]
493 # @DESCRIPTION:
494 # Check the previously fetched tree to the working copy.
495 #
496 # <repo-uri> specifies the repository URIs, as a space-separated list.
497 # The first URI will be used as repository group identifier
498 # and therefore must be used consistently with git-r3_fetch.
499 # The remaining URIs are not used and therefore may be omitted.
500 # When not specified, defaults to ${EGIT_REPO_URI}.
501 #
502 # <checkout-path> specifies the path to place the checkout. It defaults
503 # to ${EGIT_CHECKOUT_DIR} if set, otherwise to ${WORKDIR}/${P}.
504 #
505 # <local-id> needs to specify the local identifier that was used
506 # for respective git-r3_fetch.
507 #
508 # The checkout operation will write to the working copy, and export
509 # the repository state into the environment. If the repository contains
510 # submodules, they will be checked out recursively.
511 git-r3_checkout() {
512 debug-print-function ${FUNCNAME} "$@"
513
514 local repos=( ${1:-${EGIT_REPO_URI}} )
515 local out_dir=${2:-${EGIT_CHECKOUT_DIR:-${WORKDIR}/${P}}}
516 local local_id=${3:-${CATEGORY}/${PN}/${SLOT}}
517
518 local -x GIT_DIR GIT_WORK_TREE
519 _git-r3_set_gitdir ${repos[0]}
520 GIT_WORK_TREE=${out_dir}
521 mkdir -p "${GIT_WORK_TREE}"
522
523 einfo "Checking out ${repos[0]} to ${out_dir} ..."
524
525 if ! git cat-file -e refs/heads/"${local_id}"/__main__
526 then
527 if [[ ${EVCS_OFFLINE} ]]; then
528 die "No local clone of ${repos[0]}. Unable to work with EVCS_OFFLINE."
529 else
530 die "Logic error: no local clone of ${repos[0]}. git-r3_fetch not used?"
531 fi
532 fi
533
534 set -- git checkout -f "${local_id}"/__main__ .
535 echo "${@}" >&2
536 "${@}" || die "git checkout ${local_id}/__main__ failed"
537
538 # diff against previous revision (if any)
539 local new_commit_id=$(git rev-parse --verify "${local_id}"/__main__)
540 local old_commit_id=$(
541 git rev-parse --verify "${local_id}"/__old__ 2>/dev/null
542 )
543
544 if [[ ! ${old_commit_id} ]]; then
545 echo "GIT NEW branch -->"
546 echo " repository: ${repos[0]}"
547 echo " at the commit: ${new_commit_id}"
548 else
549 echo "GIT update -->"
550 echo " repository: ${repos[0]}"
551 # write out message based on the revisions
552 if [[ "${old_commit_id}" != "${new_commit_id}" ]]; then
553 echo " updating from commit: ${old_commit_id}"
554 echo " to commit: ${new_commit_id}"
555
556 git --no-pager diff --stat \
557 ${old_commit_id}..${new_commit_id}
558 else
559 echo " at the commit: ${new_commit_id}"
560 fi
561 fi
562 git branch -f "${local_id}"/{__old__,__main__} || die
563
564 # recursively checkout submodules
565 if [[ -f ${GIT_WORK_TREE}/.gitmodules ]]; then
566 local submodules
567 _git-r3_set_submodules \
568 "$(<"${GIT_WORK_TREE}"/.gitmodules)"
569
570 while [[ ${submodules[@]} ]]; do
571 local subname=${submodules[0]}
572 local url=${submodules[1]}
573 local path=${submodules[2]}
574
575 git-r3_checkout "${url}" "${GIT_WORK_TREE}/${path}" \
576 "${local_id}/${subname}"
577
578 submodules=( "${submodules[@]:3}" ) # shift
579 done
580 fi
581
582 # keep this *after* submodules
583 export EGIT_DIR=${GIT_DIR}
584 export EGIT_VERSION=${new_commit_id}
585 }
586
587 # @FUNCTION: git-r3_peek_remote_ref
588 # @USAGE: [<repo-uri> [<remote-ref>]]
589 # @DESCRIPTION:
590 # Peek the reference in the remote repository and print the matching
591 # (newest) commit SHA1.
592 #
593 # <repo-uri> specifies the repository URIs to fetch from, as a space-
594 # -separated list. When not specified, defaults to ${EGIT_REPO_URI}.
595 #
596 # <remote-ref> specifies the remote ref to peek. It is preferred to use
597 # 'refs/heads/<branch-name>' for branches and 'refs/tags/<tag-name>'
598 # for tags. Alternatively, 'HEAD' may be used for upstream default
599 # branch. Defaults to the first of EGIT_COMMIT, EGIT_BRANCH or literal
600 # 'HEAD' that is set to a non-null value.
601 #
602 # The operation will be done purely on the remote, without using local
603 # storage. If commit SHA1 is provided as <remote-ref>, the function will
604 # fail due to limitations of git protocol.
605 #
606 # On success, the function returns 0 and writes hexadecimal commit SHA1
607 # to stdout. On failure, the function returns 1.
608 git-r3_peek_remote_ref() {
609 debug-print-function ${FUNCNAME} "$@"
610
611 local repos=( ${1:-${EGIT_REPO_URI}} )
612 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
613 local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
614
615 [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
616
617 local r success
618 for r in ${repos[@]}; do
619 einfo "Peeking ${remote_ref} on ${r} ..." >&2
620
621 local is_branch lookup_ref
622 if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]]
623 then
624 is_branch=1
625 lookup_ref=${remote_ref}
626 else
627 # ls-remote by commit is going to fail anyway,
628 # so we may as well pass refs/tags/ABCDEF...
629 lookup_ref=refs/tags/${remote_ref}
630 fi
631
632 # split on whitespace
633 local ref=(
634 $(git ls-remote "${r}" "${lookup_ref}")
635 )
636
637 if [[ ${ref[0]} ]]; then
638 echo "${ref[0]}"
639 return 0
640 fi
641 done
642
643 return 1
644 }
645
646 git-r3_src_fetch() {
647 debug-print-function ${FUNCNAME} "$@"
648
649 [[ ${EVCS_OFFLINE} ]] && return
650
651 if [[ ! ${EGIT3_STORE_DIR} && ${EGIT_STORE_DIR} ]]; then
652 ewarn "You have set EGIT_STORE_DIR but not EGIT3_STORE_DIR. Please consider"
653 ewarn "setting EGIT3_STORE_DIR for git-r3.eclass. It is recommended to use"
654 ewarn "a different directory than EGIT_STORE_DIR to ease removing old clones"
655 ewarn "when git-2 eclass becomes deprecated."
656 fi
657
658 _git-r3_env_setup
659 git-r3_fetch
660 }
661
662 git-r3_src_unpack() {
663 debug-print-function ${FUNCNAME} "$@"
664
665 _git-r3_env_setup
666 git-r3_src_fetch
667 git-r3_checkout
668 }
669
670 # https://bugs.gentoo.org/show_bug.cgi?id=482666
671 git-r3_pkg_outofdate() {
672 debug-print-function ${FUNCNAME} "$@"
673
674 local new_commit_id=$(git-r3_peek_remote_ref)
675 ewarn "old: ${EGIT_VERSION}"
676 ewarn "new: ${new_commit_id}"
677 [[ ${new_commit_id} && ${old_commit_id} ]] || return 2
678
679 [[ ${EGIT_VERSION} != ${new_commit_id} ]]
680 }
681
682 _GIT_R3=1
683 fi

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