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Revision 1.4 Revision 1.29
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 1.4 2013/09/13 15:04:36 mgorny Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/git-r3.eclass,v 1.29 2014/03/02 11:46:15 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 *)
27 26
28EXPORT_FUNCTIONS src_unpack 27EXPORT_FUNCTIONS src_unpack
29 28
30if [[ ! ${_GIT_R3} ]]; then 29if [[ ! ${_GIT_R3} ]]; then
31 30
31if [[ ! ${_INHERITED_BY_GIT_2} ]]; then
32 DEPEND="dev-vcs/git"
33fi
34
32# @ECLASS-VARIABLE: EGIT3_STORE_DIR 35# @ECLASS-VARIABLE: EGIT3_STORE_DIR
33# @DESCRIPTION: 36# @DESCRIPTION:
34# Storage directory for git sources. 37# Storage directory for git sources.
38#
39# This is intended to be set by user in make.conf. Ebuilds must not set
40# it.
35# 41#
36# EGIT3_STORE_DIR=${DISTDIR}/git3-src 42# EGIT3_STORE_DIR=${DISTDIR}/git3-src
37 43
38# @ECLASS-VARIABLE: EGIT_REPO_URI 44# @ECLASS-VARIABLE: EGIT_REPO_URI
39# @REQUIRED 45# @REQUIRED
41# URIs to the repository, e.g. git://foo, https://foo. If multiple URIs 47# 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 48# are provided, the eclass will consider them as fallback URIs to try
43# if the first URI does not work. 49# if the first URI does not work.
44# 50#
45# It can be overriden via env using ${PN}_LIVE_REPO variable. 51# It can be overriden via env using ${PN}_LIVE_REPO variable.
52#
53# Can be a whitespace-separated list or an array.
46# 54#
47# Example: 55# Example:
48# @CODE 56# @CODE
49# EGIT_REPO_URI="git://a/b.git https://c/d.git" 57# EGIT_REPO_URI="git://a/b.git https://c/d.git"
50# @CODE 58# @CODE
74# @ECLASS-VARIABLE: EGIT_CHECKOUT_DIR 82# @ECLASS-VARIABLE: EGIT_CHECKOUT_DIR
75# @DESCRIPTION: 83# @DESCRIPTION:
76# The directory to check the git sources out to. 84# The directory to check the git sources out to.
77# 85#
78# EGIT_CHECKOUT_DIR=${WORKDIR}/${P} 86# EGIT_CHECKOUT_DIR=${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 87
90# @FUNCTION: _git-r3_env_setup 88# @FUNCTION: _git-r3_env_setup
91# @INTERNAL 89# @INTERNAL
92# @DESCRIPTION: 90# @DESCRIPTION:
93# Set the eclass variables as necessary for operation. This can involve 91# Set the eclass variables as necessary for operation. This can involve
169_git-r3_set_gitdir() { 167_git-r3_set_gitdir() {
170 debug-print-function ${FUNCNAME} "$@" 168 debug-print-function ${FUNCNAME} "$@"
171 169
172 local repo_name=${1#*://*/} 170 local repo_name=${1#*://*/}
173 171
172 # strip the trailing slash
173 repo_name=${repo_name%/}
174
174 # strip common prefixes to make paths more likely to match 175 # strip common prefixes to make paths more likely to match
175 # e.g. git://X/Y.git vs https://X/git/Y.git 176 # e.g. git://X/Y.git vs https://X/git/Y.git
176 # (but just one of the prefixes) 177 # (but just one of the prefixes)
177 case "${repo_name}" in 178 case "${repo_name}" in
179 # gnome.org... who else?
180 browse/*) repo_name=${repo_name#browse/};;
178 # cgit can proxy requests to git 181 # cgit can proxy requests to git
179 cgit/*) repo_name=${repo_name#cgit/};; 182 cgit/*) repo_name=${repo_name#cgit/};;
180 # pretty common 183 # pretty common
181 git/*) repo_name=${repo_name#git/};; 184 git/*) repo_name=${repo_name#git/};;
182 # gentoo.org 185 # gentoo.org
197 GIT_DIR=${EGIT3_STORE_DIR}/${repo_name} 200 GIT_DIR=${EGIT3_STORE_DIR}/${repo_name}
198 201
199 if [[ ! -d ${EGIT3_STORE_DIR} ]]; then 202 if [[ ! -d ${EGIT3_STORE_DIR} ]]; then
200 ( 203 (
201 addwrite / 204 addwrite /
202 mkdir -m0755 -p "${EGIT3_STORE_DIR}" 205 mkdir -m0755 -p "${EGIT3_STORE_DIR}" || die
203 ) || die "Unable to create ${EGIT3_STORE_DIR}" 206 ) || die "Unable to create ${EGIT3_STORE_DIR}"
204 fi 207 fi
205 208
206 addwrite "${EGIT3_STORE_DIR}" 209 addwrite "${EGIT3_STORE_DIR}"
210 if [[ -e ${GIT_DIR}/shallow ]]; then
211 einfo "${GIT_DIR} was a shallow clone, recreating..."
212 rm -r "${GIT_DIR}" || die
213 fi
207 if [[ ! -d ${GIT_DIR} ]]; then 214 if [[ ! -d ${GIT_DIR} ]]; then
208 mkdir "${GIT_DIR}" || die 215 mkdir "${GIT_DIR}" || die
209 git init --bare || die 216 git init --bare || die
210
211 # avoid auto-unshallow :)
212 touch "${GIT_DIR}"/shallow || die
213 fi 217 fi
214} 218}
215 219
216# @FUNCTION: _git-r3_set_submodules 220# @FUNCTION: _git-r3_set_submodules
217# @USAGE: <file-contents> 221# @USAGE: <file-contents>
235 [[ ${l} == submodule.*.url=* ]] || continue 239 [[ ${l} == submodule.*.url=* ]] || continue
236 240
237 l=${l#submodule.} 241 l=${l#submodule.}
238 local subname=${l%%.url=*} 242 local subname=${l%%.url=*}
239 243
244 # skip modules that have 'update = none', bug #487262.
245 local upd=$(echo "${data}" | git config -f /dev/fd/0 \
246 submodule."${subname}".update)
247 [[ ${upd} == none ]] && continue
248
240 submodules+=( 249 submodules+=(
241 "${subname}" 250 "${subname}"
242 "$(echo "${data}" | git config -f /dev/fd/0 \ 251 "$(echo "${data}" | git config -f /dev/fd/0 \
243 submodule."${subname}".url)" 252 submodule."${subname}".url || die)"
244 "$(echo "${data}" | git config -f /dev/fd/0 \ 253 "$(echo "${data}" | git config -f /dev/fd/0 \
245 submodule."${subname}".path)" 254 submodule."${subname}".path || die)"
246 ) 255 )
247 done < <(echo "${data}" | git config -f /dev/fd/0 -l) 256 done < <(echo "${data}" | git config -f /dev/fd/0 -l || die)
248} 257}
249 258
259# @FUNCTION: _git-r3_is_local_repo
260# @USAGE: <repo-uri>
261# @INTERNAL
262# @DESCRIPTION:
263# Determine whether the given URI specifies a local (on-disk)
264# repository.
265_git-r3_is_local_repo() {
266 debug-print-function ${FUNCNAME} "$@"
267
268 local uri=${1}
269
270 [[ ${uri} == file://* || ${uri} == /* ]]
271}
272
250# @FUNCTION: _git-r3_smart_fetch 273# @FUNCTION: _git-r3_update_head
251# @USAGE: <git-fetch-args>... 274# @USAGE: <remote-head-ref>
275# @INTERNAL
252# @DESCRIPTION: 276# @DESCRIPTION:
253# Try fetching without '--depth' and switch to '--depth 1' if that 277# Given a ref to which remote HEAD was fetched, try to match
254# will involve less objects fetched. 278# a local branch and update symbolic HEAD appropriately.
255_git-r3_smart_fetch() { 279_git-r3_update_head()
280{
256 debug-print-function ${FUNCNAME} "$@" 281 debug-print-function ${FUNCNAME} "$@"
257 282
258 local sed_regexp='.*Counting objects: \([0-9]*\), done\..*' 283 local head_ref=${1}
284 local head_hash=$(git rev-parse --verify "${1}" || die)
285 local matching_ref
259 286
260 # start the main fetch 287 # TODO: some transports support peeking at symbolic remote refs
261 local cmd=( git fetch --progress "${@}" ) 288 # find a way to use that rather than guessing
262 echo "${cmd[@]}" >&2
263 289
264 # we copy the output to the 'sed' pipe for parsing. whenever sed finds 290 # (based on guess_remote_head() in git-1.9.0/remote.c)
265 # the process count, it quits quickly to avoid delays in writing it. 291 local h ref
266 # then, we start a dummy 'cat' to keep the pipe alive 292 while read h ref; do
267 293 # look for matching head
268 "${cmd[@]}" 2>&1 \ 294 if [[ ${h} == ${head_hash} ]]; then
269 | tee >( 295 # either take the first matching ref, or master if it is there
270 sed -n -e "/${sed_regexp}/{s/${sed_regexp}/\1/p;q}" \ 296 if [[ ! ${matching_ref} || ${ref} == refs/heads/master ]]; then
271 > "${T}"/git-r3_main.count 297 matching_ref=${ref}
272 exec cat >/dev/null 298 fi
273 ) &
274 local main_pid=${!}
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 299 fi
300 done < <(git show-ref --heads || die)
302 301
303 exit 1 302 if [[ ! ${matching_ref} ]]; then
304 } 303 die "Unable to find a matching branch for remote HEAD (${head_hash})"
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 304 fi
333 305
334 return ${main_ret} 306 git symbolic-ref HEAD "${matching_ref}" || die
335} 307}
336 308
337# @FUNCTION: git-r3_fetch 309# @FUNCTION: git-r3_fetch
338# @USAGE: [<repo-uri> [<remote-ref> [<local-id>]]] 310# @USAGE: [<repo-uri> [<remote-ref> [<local-id>]]]
339# @DESCRIPTION: 311# @DESCRIPTION:
352# is set to a non-null value. 324# is set to a non-null value.
353# 325#
354# <local-id> specifies the local branch identifier that will be used to 326# <local-id> specifies the local branch identifier that will be used to
355# locally store the fetch result. It should be unique to multiple 327# locally store the fetch result. It should be unique to multiple
356# fetches within the repository that can be performed at the same time 328# fetches within the repository that can be performed at the same time
357# (including parallel merges). It defaults to ${CATEGORY}/${PN}/${SLOT}. 329# (including parallel merges). It defaults to ${CATEGORY}/${PN}/${SLOT%/*}.
358# This default should be fine unless you are fetching multiple trees 330# This default should be fine unless you are fetching multiple trees
359# from the same repository in the same ebuild. 331# from the same repository in the same ebuild.
360# 332#
361# The fetch operation will affect the EGIT_STORE only. It will not touch 333# The fetch operation will affect the EGIT_STORE only. It will not touch
362# the working copy, nor export any environment variables. 334# the working copy, nor export any environment variables.
363# If the repository contains submodules, they will be fetched 335# If the repository contains submodules, they will be fetched
364# recursively. 336# recursively.
365git-r3_fetch() { 337git-r3_fetch() {
366 debug-print-function ${FUNCNAME} "$@" 338 debug-print-function ${FUNCNAME} "$@"
367 339
340 [[ ${EVCS_OFFLINE} ]] && return
341
342 local repos
343 if [[ ${1} ]]; then
344 repos=( ${1} )
345 elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
346 repos=( "${EGIT_REPO_URI[@]}" )
347 else
368 local repos=( ${1:-${EGIT_REPO_URI}} ) 348 repos=( ${EGIT_REPO_URI} )
349 fi
350
369 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}} 351 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
370 local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}} 352 local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
371 local local_id=${3:-${CATEGORY}/${PN}/${SLOT}} 353 local local_id=${3:-${CATEGORY}/${PN}/${SLOT%/*}}
372 local local_ref=refs/heads/${local_id}/__main__ 354 local local_ref=refs/git-r3/${local_id}/__main__
373 355
374 [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset" 356 [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
375 357
376 local -x GIT_DIR 358 local -x GIT_DIR
377 _git-r3_set_gitdir ${repos[0]} 359 _git-r3_set_gitdir "${repos[0]}"
378 360
379 # try to fetch from the remote 361 # try to fetch from the remote
380 local r success 362 local r success
381 for r in ${repos[@]}; do 363 for r in "${repos[@]}"; do
364 einfo "Fetching ${r} ..."
365
366 local fetch_command=(
367 git fetch --prune "${r}"
368 # mirror the remote branches as local branches
369 "refs/heads/*:refs/heads/*"
370 # pull tags explicitly in order to prune them properly
371 "refs/tags/*:refs/tags/*"
372 # notes in case something needs them
373 "refs/notes/*:refs/notes/*"
374 # and HEAD in case we need the default branch
375 # (we keep it in refs/git-r3 since otherwise --prune interferes)
376 HEAD:refs/git-r3/HEAD
377 )
378
379 set -- "${fetch_command[@]}"
380 echo "${@}" >&2
381 if "${@}"; then
382 # find remote HEAD and update our HEAD properly
383 _git-r3_update_head refs/git-r3/HEAD
384
385 # now let's see what the user wants from us
386 local full_remote_ref=$(
387 git rev-parse --verify --symbolic-full-name "${remote_ref}"
388 )
389
390 if [[ ${full_remote_ref} ]]; then
391 # when we are given a ref, create a symbolic ref
392 # so that we preserve the actual argument
393 set -- git symbolic-ref "${local_ref}" "${full_remote_ref}"
394 else
395 # otherwise, we were likely given a commit id
396 set -- git update-ref --no-deref "${local_ref}" "${remote_ref}"
397 fi
398
399 echo "${@}" >&2
400 if ! "${@}"; then
401 die "Referencing ${remote_ref} failed (wrong ref?)."
402 fi
403
404 success=1
405 break
406 fi
407 done
408 [[ ${success} ]] || die "Unable to fetch from any of EGIT_REPO_URI"
409
410 # recursively fetch submodules
411 if git cat-file -e "${local_ref}":.gitmodules &>/dev/null; then
412 local submodules
413 _git-r3_set_submodules \
414 "$(git cat-file -p "${local_ref}":.gitmodules || die)"
415
416 while [[ ${submodules[@]} ]]; do
417 local subname=${submodules[0]}
418 local url=${submodules[1]}
419 local path=${submodules[2]}
420 local commit=$(git rev-parse "${local_ref}:${path}")
421
422 if [[ ! ${commit} ]]; then
423 die "Unable to get commit id for submodule ${subname}"
424 fi
425 if [[ ${url} == ./* || ${url} == ../* ]]; then
426 local subrepos=( "${repos[@]/%//${url}}" )
427 else
428 local subrepos=( "${url}" )
429 fi
430
431 git-r3_fetch "${subrepos[*]}" "${commit}" "${local_id}/${subname}"
432
433 submodules=( "${submodules[@]:3}" ) # shift
434 done
435 fi
436}
437
438# @FUNCTION: git-r3_checkout
439# @USAGE: [<repo-uri> [<checkout-path> [<local-id>]]]
440# @DESCRIPTION:
441# Check the previously fetched tree to the working copy.
442#
443# <repo-uri> specifies the repository URIs, as a space-separated list.
444# The first URI will be used as repository group identifier
445# and therefore must be used consistently with git-r3_fetch.
446# The remaining URIs are not used and therefore may be omitted.
447# When not specified, defaults to ${EGIT_REPO_URI}.
448#
449# <checkout-path> specifies the path to place the checkout. It defaults
450# to ${EGIT_CHECKOUT_DIR} if set, otherwise to ${WORKDIR}/${P}.
451#
452# <local-id> needs to specify the local identifier that was used
453# for respective git-r3_fetch.
454#
455# The checkout operation will write to the working copy, and export
456# the repository state into the environment. If the repository contains
457# submodules, they will be checked out recursively.
458git-r3_checkout() {
459 debug-print-function ${FUNCNAME} "$@"
460
461 local repos
462 if [[ ${1} ]]; then
463 repos=( ${1} )
464 elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
465 repos=( "${EGIT_REPO_URI[@]}" )
466 else
467 repos=( ${EGIT_REPO_URI} )
468 fi
469
470 local out_dir=${2:-${EGIT_CHECKOUT_DIR:-${WORKDIR}/${P}}}
471 local local_id=${3:-${CATEGORY}/${PN}/${SLOT%/*}}
472
473 local -x GIT_DIR
474 _git-r3_set_gitdir "${repos[0]}"
475
476 einfo "Checking out ${repos[0]} to ${out_dir} ..."
477
478 if ! git cat-file -e refs/git-r3/"${local_id}"/__main__; then
479 if [[ ${EVCS_OFFLINE} ]]; then
480 die "No local clone of ${repos[0]}. Unable to work with EVCS_OFFLINE."
481 else
482 die "Logic error: no local clone of ${repos[0]}. git-r3_fetch not used?"
483 fi
484 fi
485 local remote_ref=$(
486 git symbolic-ref --quiet refs/git-r3/"${local_id}"/__main__
487 )
488 local new_commit_id=$(
489 git rev-parse --verify refs/git-r3/"${local_id}"/__main__
490 )
491
492 git-r3_sub_checkout() {
493 local orig_repo=${GIT_DIR}
494 local -x GIT_DIR=${out_dir}/.git
495 local -x GIT_WORK_TREE=${out_dir}
496
497 mkdir -p "${out_dir}" || die
498
499 # use git init+fetch instead of clone since the latter doesn't like
500 # non-empty directories.
501
502 git init --quiet || die
503 # setup 'alternates' to avoid copying objects
504 echo "${orig_repo}/objects" > "${GIT_DIR}"/objects/info/alternates || die
505 # now copy the refs
506 # [htn]* safely catches heads, tags, notes without complaining
507 # on non-existing ones, and omits internal 'git-r3' ref
508 cp -R "${orig_repo}"/refs/[htn]* "${GIT_DIR}"/refs/ || die
509
510 # (no need to copy HEAD, we will set it via checkout)
511
512 set -- git checkout --quiet
513 if [[ ${remote_ref} ]]; then
514 set -- "${@}" "${remote_ref#refs/heads/}"
515 else
516 set -- "${@}" "${new_commit_id}"
517 fi
518 echo "${@}" >&2
519 "${@}" || die "git checkout ${remote_ref:-${new_commit_id}} failed"
520 }
521 git-r3_sub_checkout
522
523 local old_commit_id=$(
524 git rev-parse --quiet --verify refs/git-r3/"${local_id}"/__old__
525 )
526 if [[ ! ${old_commit_id} ]]; then
527 echo "GIT NEW branch -->"
528 echo " repository: ${repos[0]}"
529 echo " at the commit: ${new_commit_id}"
530 else
531 # diff against previous revision
532 echo "GIT update -->"
533 echo " repository: ${repos[0]}"
534 # write out message based on the revisions
535 if [[ "${old_commit_id}" != "${new_commit_id}" ]]; then
536 echo " updating from commit: ${old_commit_id}"
537 echo " to commit: ${new_commit_id}"
538
539 git --no-pager diff --stat \
540 ${old_commit_id}..${new_commit_id}
541 else
542 echo " at the commit: ${new_commit_id}"
543 fi
544 fi
545 git update-ref --no-deref refs/git-r3/"${local_id}"/{__old__,__main__} || die
546
547 # recursively checkout submodules
548 if [[ -f ${out_dir}/.gitmodules ]]; then
549 local submodules
550 _git-r3_set_submodules \
551 "$(<"${out_dir}"/.gitmodules)"
552
553 while [[ ${submodules[@]} ]]; do
554 local subname=${submodules[0]}
555 local url=${submodules[1]}
556 local path=${submodules[2]}
557
558 if [[ ${url} == ./* || ${url} == ../* ]]; then
559 url=${repos[0]%%/}/${url}
560 fi
561
562 git-r3_checkout "${url}" "${out_dir}/${path}" \
563 "${local_id}/${subname}"
564
565 submodules=( "${submodules[@]:3}" ) # shift
566 done
567 fi
568
569 # keep this *after* submodules
570 export EGIT_DIR=${GIT_DIR}
571 export EGIT_VERSION=${new_commit_id}
572}
573
574# @FUNCTION: git-r3_peek_remote_ref
575# @USAGE: [<repo-uri> [<remote-ref>]]
576# @DESCRIPTION:
577# Peek the reference in the remote repository and print the matching
578# (newest) commit SHA1.
579#
580# <repo-uri> specifies the repository URIs to fetch from, as a space-
581# -separated list. When not specified, defaults to ${EGIT_REPO_URI}.
582#
583# <remote-ref> specifies the remote ref to peek. It is preferred to use
584# 'refs/heads/<branch-name>' for branches and 'refs/tags/<tag-name>'
585# for tags. Alternatively, 'HEAD' may be used for upstream default
586# branch. Defaults to the first of EGIT_COMMIT, EGIT_BRANCH or literal
587# 'HEAD' that is set to a non-null value.
588#
589# The operation will be done purely on the remote, without using local
590# storage. If commit SHA1 is provided as <remote-ref>, the function will
591# fail due to limitations of git protocol.
592#
593# On success, the function returns 0 and writes hexadecimal commit SHA1
594# to stdout. On failure, the function returns 1.
595git-r3_peek_remote_ref() {
596 debug-print-function ${FUNCNAME} "$@"
597
598 local repos
599 if [[ ${1} ]]; then
600 repos=( ${1} )
601 elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
602 repos=( "${EGIT_REPO_URI[@]}" )
603 else
604 repos=( ${EGIT_REPO_URI} )
605 fi
606
607 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
608 local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
609
610 [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
611
612 local r success
613 for r in "${repos[@]}"; do
382 einfo "Fetching ${remote_ref} from ${r} ..." 614 einfo "Peeking ${remote_ref} on ${r} ..." >&2
383 615
384 local is_branch lookup_ref 616 local is_branch lookup_ref
385 if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]] 617 if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]]
386 then 618 then
387 is_branch=1 619 is_branch=1
390 # ls-remote by commit is going to fail anyway, 622 # ls-remote by commit is going to fail anyway,
391 # so we may as well pass refs/tags/ABCDEF... 623 # so we may as well pass refs/tags/ABCDEF...
392 lookup_ref=refs/tags/${remote_ref} 624 lookup_ref=refs/tags/${remote_ref}
393 fi 625 fi
394 626
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.
511git-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.
608git-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 627 # split on whitespace
633 local ref=( 628 local ref=(
634 $(git ls-remote "${r}" "${lookup_ref}") 629 $(git ls-remote "${r}" "${lookup_ref}")
635 ) 630 )
636 631
644} 639}
645 640
646git-r3_src_fetch() { 641git-r3_src_fetch() {
647 debug-print-function ${FUNCNAME} "$@" 642 debug-print-function ${FUNCNAME} "$@"
648 643
649 [[ ${EVCS_OFFLINE} ]] && return
650
651 if [[ ! ${EGIT3_STORE_DIR} && ${EGIT_STORE_DIR} ]]; then 644 if [[ ! ${EGIT3_STORE_DIR} && ${EGIT_STORE_DIR} ]]; then
652 ewarn "You have set EGIT_STORE_DIR but not EGIT3_STORE_DIR. Please consider" 645 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" 646 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" 647 ewarn "a different directory than EGIT_STORE_DIR to ease removing old clones"
655 ewarn "when git-2 eclass becomes deprecated." 648 ewarn "when git-2 eclass becomes deprecated."

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