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Revision 1.15 - (hide annotations) (download)
Wed Oct 9 17:14:07 2013 UTC (11 months, 1 week ago) by mgorny
Branch: MAIN
Changes since 1.14: +6 -1 lines
Skip submodules that have update=none specified in config. Fixes bug #487262.

1 mgorny 1.1 # Copyright 1999-2013 Gentoo Foundation
2     # Distributed under the terms of the GNU General Public License v2
3 mgorny 1.15 # $Header: /var/cvsroot/gentoo-x86/eclass/git-r3.eclass,v 1.14 2013/10/08 11:19:48 mgorny Exp $
4 mgorny 1.1
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 mgorny 1.14 if [[ ! ${_INHERITED_BY_GIT_2} ]]; then
33     DEPEND=">=dev-vcs/git-1.8.2.1"
34     fi
35 mgorny 1.13
36 mgorny 1.1 # @ECLASS-VARIABLE: EGIT3_STORE_DIR
37     # @DESCRIPTION:
38     # Storage directory for git sources.
39     #
40     # EGIT3_STORE_DIR=${DISTDIR}/git3-src
41    
42     # @ECLASS-VARIABLE: EGIT_REPO_URI
43     # @REQUIRED
44     # @DESCRIPTION:
45     # URIs to the repository, e.g. git://foo, https://foo. If multiple URIs
46     # are provided, the eclass will consider them as fallback URIs to try
47     # if the first URI does not work.
48     #
49     # It can be overriden via env using ${PN}_LIVE_REPO variable.
50     #
51 mgorny 1.9 # Can be a whitespace-separated list or an array.
52     #
53 mgorny 1.1 # Example:
54     # @CODE
55     # EGIT_REPO_URI="git://a/b.git https://c/d.git"
56     # @CODE
57    
58     # @ECLASS-VARIABLE: EVCS_OFFLINE
59     # @DEFAULT_UNSET
60     # @DESCRIPTION:
61     # If non-empty, this variable prevents any online operations.
62    
63     # @ECLASS-VARIABLE: EGIT_BRANCH
64     # @DEFAULT_UNSET
65     # @DESCRIPTION:
66     # The branch name to check out. If unset, the upstream default (HEAD)
67     # will be used.
68     #
69     # It can be overriden via env using ${PN}_LIVE_BRANCH variable.
70    
71     # @ECLASS-VARIABLE: EGIT_COMMIT
72     # @DEFAULT_UNSET
73     # @DESCRIPTION:
74     # The tag name or commit identifier to check out. If unset, newest
75     # commit from the branch will be used. If set, EGIT_BRANCH will
76     # be ignored.
77     #
78     # It can be overriden via env using ${PN}_LIVE_COMMIT variable.
79    
80     # @ECLASS-VARIABLE: EGIT_CHECKOUT_DIR
81     # @DESCRIPTION:
82     # The directory to check the git sources out to.
83     #
84     # EGIT_CHECKOUT_DIR=${WORKDIR}/${P}
85    
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 mgorny 1.10 # 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 mgorny 1.1
98     # @FUNCTION: _git-r3_env_setup
99     # @INTERNAL
100     # @DESCRIPTION:
101     # Set the eclass variables as necessary for operation. This can involve
102     # setting EGIT_* to defaults or ${PN}_LIVE_* variables.
103     _git-r3_env_setup() {
104     debug-print-function ${FUNCNAME} "$@"
105    
106     local esc_pn livevar
107     esc_pn=${PN//[-+]/_}
108    
109     livevar=${esc_pn}_LIVE_REPO
110     EGIT_REPO_URI=${!livevar:-${EGIT_REPO_URI}}
111     [[ ${!livevar} ]] \
112     && ewarn "Using ${livevar}, no support will be provided"
113    
114     livevar=${esc_pn}_LIVE_BRANCH
115     EGIT_BRANCH=${!livevar:-${EGIT_BRANCH}}
116     [[ ${!livevar} ]] \
117     && ewarn "Using ${livevar}, no support will be provided"
118    
119     livevar=${esc_pn}_LIVE_COMMIT
120     EGIT_COMMIT=${!livevar:-${EGIT_COMMIT}}
121     [[ ${!livevar} ]] \
122     && ewarn "Using ${livevar}, no support will be provided"
123    
124     # Migration helpers. Remove them when git-2 is removed.
125    
126     if [[ ${EGIT_SOURCEDIR} ]]; then
127     eerror "EGIT_SOURCEDIR has been replaced by EGIT_CHECKOUT_DIR. While updating"
128     eerror "your ebuild, please check whether the variable is necessary at all"
129     eerror "since the default has been changed from \${S} to \${WORKDIR}/\${P}."
130     eerror "Therefore, proper setting of S may be sufficient."
131     die "EGIT_SOURCEDIR has been replaced by EGIT_CHECKOUT_DIR."
132     fi
133    
134     if [[ ${EGIT_MASTER} ]]; then
135     eerror "EGIT_MASTER has been removed. Instead, the upstream default (HEAD)"
136     eerror "is used by the eclass. Please remove the assignment or use EGIT_BRANCH"
137     eerror "as necessary."
138     die "EGIT_MASTER has been removed."
139     fi
140    
141     if [[ ${EGIT_HAS_SUBMODULES} ]]; then
142     eerror "EGIT_HAS_SUBMODULES has been removed. The eclass no longer needs"
143     eerror "to switch the clone type in order to support submodules and therefore"
144     eerror "submodules are detected and fetched automatically."
145     die "EGIT_HAS_SUBMODULES is no longer necessary."
146     fi
147    
148     if [[ ${EGIT_PROJECT} ]]; then
149     eerror "EGIT_PROJECT has been removed. Instead, the eclass determines"
150     eerror "the local clone path using path in canonical EGIT_REPO_URI."
151     eerror "If the current algorithm causes issues for you, please report a bug."
152     die "EGIT_PROJECT is no longer necessary."
153     fi
154    
155     if [[ ${EGIT_BOOTSTRAP} ]]; then
156     eerror "EGIT_BOOTSTRAP has been removed. Please create proper src_prepare()"
157     eerror "instead."
158     die "EGIT_BOOTSTRAP has been removed."
159     fi
160    
161     if [[ ${EGIT_NOUNPACK} ]]; then
162     eerror "EGIT_NOUNPACK has been removed. The eclass no longer calls default"
163     eerror "unpack function. If necessary, please declare proper src_unpack()."
164     die "EGIT_NOUNPACK has been removed."
165     fi
166     }
167    
168     # @FUNCTION: _git-r3_set_gitdir
169     # @USAGE: <repo-uri>
170     # @INTERNAL
171     # @DESCRIPTION:
172     # Obtain the local repository path and set it as GIT_DIR. Creates
173     # a new repository if necessary.
174     #
175     # <repo-uri> may be used to compose the path. It should therefore be
176     # a canonical URI to the repository.
177     _git-r3_set_gitdir() {
178     debug-print-function ${FUNCNAME} "$@"
179    
180     local repo_name=${1#*://*/}
181    
182 mgorny 1.7 # strip the trailing slash
183     repo_name=${repo_name%/}
184    
185 mgorny 1.1 # strip common prefixes to make paths more likely to match
186     # e.g. git://X/Y.git vs https://X/git/Y.git
187     # (but just one of the prefixes)
188     case "${repo_name}" in
189 mgorny 1.8 # gnome.org... who else?
190     browse/*) repo_name=${repo_name#browse/};;
191 mgorny 1.1 # cgit can proxy requests to git
192     cgit/*) repo_name=${repo_name#cgit/};;
193     # pretty common
194     git/*) repo_name=${repo_name#git/};;
195     # gentoo.org
196     gitroot/*) repo_name=${repo_name#gitroot/};;
197     # google code, sourceforge
198     p/*) repo_name=${repo_name#p/};;
199     # kernel.org
200     pub/scm/*) repo_name=${repo_name#pub/scm/};;
201     esac
202     # ensure a .git suffix, same reason
203     repo_name=${repo_name%.git}.git
204     # now replace all the slashes
205     repo_name=${repo_name//\//_}
206    
207     local distdir=${PORTAGE_ACTUAL_DISTDIR:-${DISTDIR}}
208     : ${EGIT3_STORE_DIR:=${distdir}/git3-src}
209    
210     GIT_DIR=${EGIT3_STORE_DIR}/${repo_name}
211    
212     if [[ ! -d ${EGIT3_STORE_DIR} ]]; then
213     (
214     addwrite /
215     mkdir -m0755 -p "${EGIT3_STORE_DIR}"
216     ) || die "Unable to create ${EGIT3_STORE_DIR}"
217     fi
218    
219     addwrite "${EGIT3_STORE_DIR}"
220     if [[ ! -d ${GIT_DIR} ]]; then
221     mkdir "${GIT_DIR}" || die
222     git init --bare || die
223    
224 mgorny 1.6 if [[ ! ${EGIT_NONSHALLOW} ]]; then
225     # avoid auto-unshallow :)
226     touch "${GIT_DIR}"/shallow || die
227     fi
228 mgorny 1.1 fi
229     }
230    
231     # @FUNCTION: _git-r3_set_submodules
232     # @USAGE: <file-contents>
233     # @INTERNAL
234     # @DESCRIPTION:
235     # Parse .gitmodules contents passed as <file-contents>
236     # as in "$(cat .gitmodules)"). Composes a 'submodules' array that
237     # contains in order (name, URL, path) for each submodule.
238     _git-r3_set_submodules() {
239     debug-print-function ${FUNCNAME} "$@"
240    
241     local data=${1}
242    
243     # ( name url path ... )
244     submodules=()
245    
246     local l
247     while read l; do
248     # submodule.<path>.path=<path>
249     # submodule.<path>.url=<url>
250     [[ ${l} == submodule.*.url=* ]] || continue
251    
252     l=${l#submodule.}
253     local subname=${l%%.url=*}
254    
255 mgorny 1.15 # skip modules that have 'update = none', bug #487262.
256     local upd=$(echo "${data}" | git config -f /dev/fd/0 \
257     submodule."${subname}".update)
258     [[ ${upd} == none ]] && continue
259    
260 mgorny 1.1 submodules+=(
261     "${subname}"
262     "$(echo "${data}" | git config -f /dev/fd/0 \
263     submodule."${subname}".url)"
264     "$(echo "${data}" | git config -f /dev/fd/0 \
265     submodule."${subname}".path)"
266     )
267     done < <(echo "${data}" | git config -f /dev/fd/0 -l)
268     }
269    
270 mgorny 1.3 # @FUNCTION: _git-r3_smart_fetch
271     # @USAGE: <git-fetch-args>...
272     # @DESCRIPTION:
273     # Try fetching without '--depth' and switch to '--depth 1' if that
274     # will involve less objects fetched.
275     _git-r3_smart_fetch() {
276     debug-print-function ${FUNCNAME} "$@"
277    
278     local sed_regexp='.*Counting objects: \([0-9]*\), done\..*'
279    
280     # start the main fetch
281     local cmd=( git fetch --progress "${@}" )
282     echo "${cmd[@]}" >&2
283    
284     # we copy the output to the 'sed' pipe for parsing. whenever sed finds
285     # the process count, it quits quickly to avoid delays in writing it.
286     # then, we start a dummy 'cat' to keep the pipe alive
287    
288     "${cmd[@]}" 2>&1 \
289     | tee >(
290     sed -n -e "/${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    
296     # start the helper process
297     _git-r3_sub_fetch() {
298     # wait for main fetch to get object count; if the server doesn't
299     # output it, we won't even launch the parallel process
300     while [[ ! -s ${T}/git-r3_main.count ]]; do
301     sleep 0.25
302     done
303    
304     # ok, let's see if parallel fetch gives us smaller count
305     # --dry-run will prevent it from writing to the local clone
306     # and sed should terminate git with SIGPIPE
307     local sub_count=$(git fetch --progress --dry-run --depth 1 "${@}" 2>&1 \
308     | sed -n -e "/${sed_regexp}/{s/${sed_regexp}/\1/p;q}")
309     local main_count=$(<"${T}"/git-r3_main.count)
310    
311     # let's be real sure that '--depth 1' will be good for us.
312     # note that we have purely objects counts, and '--depth 1'
313     # may involve much bigger objects
314     if [[ ${main_count} && ${main_count} -ge $(( sub_count * 3/2 )) ]]
315     then
316     # signal that we want shallow fetch instead,
317     # and terminate the non-shallow fetch process
318     touch "${T}"/git-r3_want_shallow || die
319     kill ${main_pid} &>/dev/null
320     exit 0
321     fi
322    
323     exit 1
324     }
325     _git-r3_sub_fetch "${@}" &
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
353    
354     return ${main_ret}
355     }
356    
357 mgorny 1.1 # @FUNCTION: git-r3_fetch
358     # @USAGE: [<repo-uri> [<remote-ref> [<local-id>]]]
359     # @DESCRIPTION:
360     # Fetch new commits to the local clone of repository.
361     #
362     # <repo-uri> specifies the repository URIs to fetch from, as a space-
363     # -separated list. The first URI will be used as repository group
364     # identifier and therefore must be used consistently. When not
365     # specified, defaults to ${EGIT_REPO_URI}.
366     #
367     # <remote-ref> specifies the remote ref or commit id to fetch.
368     # It is preferred to use 'refs/heads/<branch-name>' for branches
369     # and 'refs/tags/<tag-name>' for tags. Other options are 'HEAD'
370     # for upstream default branch and hexadecimal commit SHA1. Defaults
371     # to the first of EGIT_COMMIT, EGIT_BRANCH or literal 'HEAD' that
372     # is set to a non-null value.
373     #
374     # <local-id> specifies the local branch identifier that will be used to
375     # locally store the fetch result. It should be unique to multiple
376     # fetches within the repository that can be performed at the same time
377     # (including parallel merges). It defaults to ${CATEGORY}/${PN}/${SLOT}.
378     # This default should be fine unless you are fetching multiple trees
379     # from the same repository in the same ebuild.
380     #
381     # The fetch operation will affect the EGIT_STORE only. It will not touch
382     # the working copy, nor export any environment variables.
383     # If the repository contains submodules, they will be fetched
384     # recursively.
385     git-r3_fetch() {
386     debug-print-function ${FUNCNAME} "$@"
387    
388 mgorny 1.11 local repos
389     if [[ ${1} ]]; then
390     repos=( ${1} )
391     elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
392     repos=( "${EGIT_REPO_URI[@]}" )
393     else
394     repos=( ${EGIT_REPO_URI} )
395 mgorny 1.9 fi
396    
397 mgorny 1.1 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
398     local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
399     local local_id=${3:-${CATEGORY}/${PN}/${SLOT}}
400     local local_ref=refs/heads/${local_id}/__main__
401    
402     [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
403    
404     local -x GIT_DIR
405 mgorny 1.9 _git-r3_set_gitdir "${repos[0]}"
406 mgorny 1.1
407     # try to fetch from the remote
408     local r success
409 mgorny 1.9 for r in "${repos[@]}"; do
410 mgorny 1.1 einfo "Fetching ${remote_ref} from ${r} ..."
411    
412     local is_branch lookup_ref
413     if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]]
414     then
415     is_branch=1
416     lookup_ref=${remote_ref}
417     else
418     # ls-remote by commit is going to fail anyway,
419     # so we may as well pass refs/tags/ABCDEF...
420     lookup_ref=refs/tags/${remote_ref}
421     fi
422    
423     # first, try ls-remote to see if ${remote_ref} is a real ref
424     # and not a commit id. if it succeeds, we can pass ${remote_ref}
425     # to 'fetch'. otherwise, we will just fetch everything
426    
427     # split on whitespace
428     local ref=(
429 mgorny 1.5 $(git ls-remote "${r}" "${lookup_ref}" || echo __FAIL__)
430 mgorny 1.1 )
431    
432 mgorny 1.5 # normally, ref[0] is a hash, so we can do magic strings here
433     [[ ${ref[0]} == __FAIL__ ]] && continue
434    
435 mgorny 1.4 local nonshallow=${EGIT_NONSHALLOW}
436 mgorny 1.1 local ref_param=()
437     if [[ ! ${ref[0]} ]]; then
438 mgorny 1.4 nonshallow=1
439 mgorny 1.1 fi
440    
441 mgorny 1.2 # 1. if we need a non-shallow clone and we have a shallow one,
442     # we need to unshallow it explicitly.
443     # 2. if we want a shallow clone, we just pass '--depth 1'
444     # to the first fetch in the repo. passing '--depth'
445     # to further requests usually results in more data being
446     # downloaded than without it.
447 mgorny 1.3 # 3. if we update a shallow clone, we try without '--depth'
448     # first since that usually transfers less data. however,
449     # we use git-r3_smart_fetch that can switch into '--depth 1'
450     # if that looks beneficial.
451 mgorny 1.2
452 mgorny 1.3 local fetch_command=( git fetch )
453 mgorny 1.4 if [[ ${nonshallow} ]]; then
454 mgorny 1.2 if [[ -f ${GIT_DIR}/shallow ]]; then
455     ref_param+=( --unshallow )
456     fi
457 mgorny 1.12 # fetch all branches
458     ref_param+=( "refs/heads/*:refs/remotes/origin/*" )
459 mgorny 1.1 else
460 mgorny 1.2 # 'git show-ref --heads' returns 1 when there are no branches
461     if ! git show-ref --heads -q; then
462     ref_param+=( --depth 1 )
463 mgorny 1.3 else
464     fetch_command=( _git-r3_smart_fetch )
465 mgorny 1.2 fi
466 mgorny 1.1 fi
467    
468 mgorny 1.2 # now, another important thing. we may only fetch a remote
469     # branch directly to a local branch. Otherwise, we need to fetch
470     # the commit and re-create the branch on top of it.
471    
472 mgorny 1.1 if [[ ${ref[0]} ]]; then
473     if [[ ${is_branch} ]]; then
474     ref_param+=( -f "${remote_ref}:${local_id}/__main__" )
475     else
476     ref_param+=( "refs/tags/${remote_ref}" )
477     fi
478     fi
479    
480     # if ${remote_ref} is branch or tag, ${ref[@]} will contain
481     # the respective commit id. otherwise, it will be an empty
482     # array, so the following won't evaluate to a parameter.
483 mgorny 1.3 set -- "${fetch_command[@]}" --no-tags "${r}" "${ref_param[@]}"
484 mgorny 1.1 echo "${@}" >&2
485     if "${@}"; then
486     if [[ ! ${is_branch} ]]; then
487     set -- git branch -f "${local_id}/__main__" \
488     "${ref[0]:-${remote_ref}}"
489     echo "${@}" >&2
490     if ! "${@}"; then
491     die "Creating branch for ${remote_ref} failed (wrong ref?)."
492     fi
493     fi
494    
495     success=1
496     break
497     fi
498     done
499     [[ ${success} ]] || die "Unable to fetch from any of EGIT_REPO_URI"
500    
501     # recursively fetch submodules
502     if git cat-file -e "${local_ref}":.gitmodules &>/dev/null; then
503     local submodules
504     _git-r3_set_submodules \
505     "$(git cat-file -p "${local_ref}":.gitmodules || die)"
506    
507     while [[ ${submodules[@]} ]]; do
508     local subname=${submodules[0]}
509     local url=${submodules[1]}
510     local path=${submodules[2]}
511     local commit=$(git rev-parse "${local_ref}:${path}")
512    
513     if [[ ! ${commit} ]]; then
514     die "Unable to get commit id for submodule ${subname}"
515     fi
516    
517     git-r3_fetch "${url}" "${commit}" "${local_id}/${subname}"
518    
519     submodules=( "${submodules[@]:3}" ) # shift
520     done
521     fi
522     }
523    
524     # @FUNCTION: git-r3_checkout
525     # @USAGE: [<repo-uri> [<checkout-path> [<local-id>]]]
526     # @DESCRIPTION:
527     # Check the previously fetched tree to the working copy.
528     #
529     # <repo-uri> specifies the repository URIs, as a space-separated list.
530     # The first URI will be used as repository group identifier
531     # and therefore must be used consistently with git-r3_fetch.
532     # The remaining URIs are not used and therefore may be omitted.
533     # When not specified, defaults to ${EGIT_REPO_URI}.
534     #
535     # <checkout-path> specifies the path to place the checkout. It defaults
536     # to ${EGIT_CHECKOUT_DIR} if set, otherwise to ${WORKDIR}/${P}.
537     #
538     # <local-id> needs to specify the local identifier that was used
539     # for respective git-r3_fetch.
540     #
541     # The checkout operation will write to the working copy, and export
542     # the repository state into the environment. If the repository contains
543     # submodules, they will be checked out recursively.
544     git-r3_checkout() {
545     debug-print-function ${FUNCNAME} "$@"
546    
547 mgorny 1.11 local repos
548     if [[ ${1} ]]; then
549     repos=( ${1} )
550     elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
551     repos=( "${EGIT_REPO_URI[@]}" )
552     else
553     repos=( ${EGIT_REPO_URI} )
554 mgorny 1.9 fi
555    
556 mgorny 1.1 local out_dir=${2:-${EGIT_CHECKOUT_DIR:-${WORKDIR}/${P}}}
557     local local_id=${3:-${CATEGORY}/${PN}/${SLOT}}
558    
559     local -x GIT_DIR GIT_WORK_TREE
560 mgorny 1.9 _git-r3_set_gitdir "${repos[0]}"
561 mgorny 1.1 GIT_WORK_TREE=${out_dir}
562     mkdir -p "${GIT_WORK_TREE}"
563    
564     einfo "Checking out ${repos[0]} to ${out_dir} ..."
565    
566     if ! git cat-file -e refs/heads/"${local_id}"/__main__
567     then
568     if [[ ${EVCS_OFFLINE} ]]; then
569     die "No local clone of ${repos[0]}. Unable to work with EVCS_OFFLINE."
570     else
571     die "Logic error: no local clone of ${repos[0]}. git-r3_fetch not used?"
572     fi
573     fi
574    
575     set -- git checkout -f "${local_id}"/__main__ .
576     echo "${@}" >&2
577     "${@}" || die "git checkout ${local_id}/__main__ failed"
578    
579     # diff against previous revision (if any)
580     local new_commit_id=$(git rev-parse --verify "${local_id}"/__main__)
581     local old_commit_id=$(
582     git rev-parse --verify "${local_id}"/__old__ 2>/dev/null
583     )
584    
585     if [[ ! ${old_commit_id} ]]; then
586     echo "GIT NEW branch -->"
587     echo " repository: ${repos[0]}"
588     echo " at the commit: ${new_commit_id}"
589     else
590     echo "GIT update -->"
591     echo " repository: ${repos[0]}"
592     # write out message based on the revisions
593     if [[ "${old_commit_id}" != "${new_commit_id}" ]]; then
594     echo " updating from commit: ${old_commit_id}"
595     echo " to commit: ${new_commit_id}"
596    
597     git --no-pager diff --stat \
598     ${old_commit_id}..${new_commit_id}
599     else
600     echo " at the commit: ${new_commit_id}"
601     fi
602     fi
603     git branch -f "${local_id}"/{__old__,__main__} || die
604    
605     # recursively checkout submodules
606     if [[ -f ${GIT_WORK_TREE}/.gitmodules ]]; then
607     local submodules
608     _git-r3_set_submodules \
609     "$(<"${GIT_WORK_TREE}"/.gitmodules)"
610    
611     while [[ ${submodules[@]} ]]; do
612     local subname=${submodules[0]}
613     local url=${submodules[1]}
614     local path=${submodules[2]}
615    
616     git-r3_checkout "${url}" "${GIT_WORK_TREE}/${path}" \
617     "${local_id}/${subname}"
618    
619     submodules=( "${submodules[@]:3}" ) # shift
620     done
621     fi
622    
623     # keep this *after* submodules
624     export EGIT_DIR=${GIT_DIR}
625     export EGIT_VERSION=${new_commit_id}
626     }
627    
628     # @FUNCTION: git-r3_peek_remote_ref
629     # @USAGE: [<repo-uri> [<remote-ref>]]
630     # @DESCRIPTION:
631     # Peek the reference in the remote repository and print the matching
632     # (newest) commit SHA1.
633     #
634     # <repo-uri> specifies the repository URIs to fetch from, as a space-
635     # -separated list. When not specified, defaults to ${EGIT_REPO_URI}.
636     #
637     # <remote-ref> specifies the remote ref to peek. It is preferred to use
638     # 'refs/heads/<branch-name>' for branches and 'refs/tags/<tag-name>'
639     # for tags. Alternatively, 'HEAD' may be used for upstream default
640     # branch. Defaults to the first of EGIT_COMMIT, EGIT_BRANCH or literal
641     # 'HEAD' that is set to a non-null value.
642     #
643     # The operation will be done purely on the remote, without using local
644     # storage. If commit SHA1 is provided as <remote-ref>, the function will
645     # fail due to limitations of git protocol.
646     #
647     # On success, the function returns 0 and writes hexadecimal commit SHA1
648     # to stdout. On failure, the function returns 1.
649     git-r3_peek_remote_ref() {
650     debug-print-function ${FUNCNAME} "$@"
651    
652 mgorny 1.11 local repos
653     if [[ ${1} ]]; then
654     repos=( ${1} )
655     elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
656     repos=( "${EGIT_REPO_URI[@]}" )
657     else
658     repos=( ${EGIT_REPO_URI} )
659 mgorny 1.9 fi
660    
661 mgorny 1.1 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
662     local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
663    
664     [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
665    
666     local r success
667 mgorny 1.9 for r in "${repos[@]}"; do
668 mgorny 1.1 einfo "Peeking ${remote_ref} on ${r} ..." >&2
669    
670     local is_branch lookup_ref
671     if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]]
672     then
673     is_branch=1
674     lookup_ref=${remote_ref}
675     else
676     # ls-remote by commit is going to fail anyway,
677     # so we may as well pass refs/tags/ABCDEF...
678     lookup_ref=refs/tags/${remote_ref}
679     fi
680    
681     # split on whitespace
682     local ref=(
683     $(git ls-remote "${r}" "${lookup_ref}")
684     )
685    
686     if [[ ${ref[0]} ]]; then
687     echo "${ref[0]}"
688     return 0
689     fi
690     done
691    
692     return 1
693     }
694    
695     git-r3_src_fetch() {
696     debug-print-function ${FUNCNAME} "$@"
697    
698     [[ ${EVCS_OFFLINE} ]] && return
699    
700     if [[ ! ${EGIT3_STORE_DIR} && ${EGIT_STORE_DIR} ]]; then
701     ewarn "You have set EGIT_STORE_DIR but not EGIT3_STORE_DIR. Please consider"
702     ewarn "setting EGIT3_STORE_DIR for git-r3.eclass. It is recommended to use"
703     ewarn "a different directory than EGIT_STORE_DIR to ease removing old clones"
704     ewarn "when git-2 eclass becomes deprecated."
705     fi
706    
707     _git-r3_env_setup
708     git-r3_fetch
709     }
710    
711     git-r3_src_unpack() {
712     debug-print-function ${FUNCNAME} "$@"
713    
714     _git-r3_env_setup
715     git-r3_src_fetch
716     git-r3_checkout
717     }
718    
719     # https://bugs.gentoo.org/show_bug.cgi?id=482666
720     git-r3_pkg_outofdate() {
721     debug-print-function ${FUNCNAME} "$@"
722    
723     local new_commit_id=$(git-r3_peek_remote_ref)
724     ewarn "old: ${EGIT_VERSION}"
725     ewarn "new: ${new_commit_id}"
726     [[ ${new_commit_id} && ${old_commit_id} ]] || return 2
727    
728     [[ ${EGIT_VERSION} != ${new_commit_id} ]]
729     }
730    
731     _GIT_R3=1
732     fi

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