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Revision 1.18 - (hide annotations) (download)
Mon Oct 14 20:30:00 2013 UTC (13 months, 2 weeks ago) by mgorny
Branch: MAIN
Changes since 1.17: +2 -2 lines
Fix over-use of ||die.

1 mgorny 1.1 # Copyright 1999-2013 Gentoo Foundation
2     # Distributed under the terms of the GNU General Public License v2
3 mgorny 1.18 # $Header: /var/cvsroot/gentoo-x86/eclass/git-r3.eclass,v 1.17 2013/10/14 13:32:33 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 ${EGIT3_STORE_DIR} ]]; then
213     (
214     addwrite /
215 mgorny 1.17 mkdir -m0755 -p "${EGIT3_STORE_DIR}" || die
216 mgorny 1.1 ) || 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 "${data}" | git config -f /dev/fd/0 \
257 mgorny 1.18 submodule."${subname}".update)
258 mgorny 1.15 [[ ${upd} == none ]] && continue
259    
260 mgorny 1.1 submodules+=(
261     "${subname}"
262     "$(echo "${data}" | git config -f /dev/fd/0 \
263 mgorny 1.17 submodule."${subname}".url || die)"
264 mgorny 1.1 "$(echo "${data}" | git config -f /dev/fd/0 \
265 mgorny 1.17 submodule."${subname}".path || die)"
266 mgorny 1.1 )
267 mgorny 1.17 done < <(echo "${data}" | git config -f /dev/fd/0 -l || die)
268 mgorny 1.1 }
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 1.16 [[ ${EVCS_OFFLINE} ]] && return
389    
390 mgorny 1.11 local repos
391     if [[ ${1} ]]; then
392     repos=( ${1} )
393     elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
394     repos=( "${EGIT_REPO_URI[@]}" )
395     else
396     repos=( ${EGIT_REPO_URI} )
397 mgorny 1.9 fi
398    
399 mgorny 1.1 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
400     local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
401     local local_id=${3:-${CATEGORY}/${PN}/${SLOT}}
402     local local_ref=refs/heads/${local_id}/__main__
403    
404     [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
405    
406     local -x GIT_DIR
407 mgorny 1.9 _git-r3_set_gitdir "${repos[0]}"
408 mgorny 1.1
409     # try to fetch from the remote
410     local r success
411 mgorny 1.9 for r in "${repos[@]}"; do
412 mgorny 1.1 einfo "Fetching ${remote_ref} from ${r} ..."
413    
414     local is_branch lookup_ref
415     if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]]
416     then
417     is_branch=1
418     lookup_ref=${remote_ref}
419     else
420     # ls-remote by commit is going to fail anyway,
421     # so we may as well pass refs/tags/ABCDEF...
422     lookup_ref=refs/tags/${remote_ref}
423     fi
424    
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 mgorny 1.5 $(git ls-remote "${r}" "${lookup_ref}" || echo __FAIL__)
432 mgorny 1.1 )
433    
434 mgorny 1.5 # normally, ref[0] is a hash, so we can do magic strings here
435     [[ ${ref[0]} == __FAIL__ ]] && continue
436    
437 mgorny 1.4 local nonshallow=${EGIT_NONSHALLOW}
438 mgorny 1.1 local ref_param=()
439     if [[ ! ${ref[0]} ]]; then
440 mgorny 1.4 nonshallow=1
441 mgorny 1.1 fi
442    
443 mgorny 1.2 # 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 mgorny 1.3 # 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 mgorny 1.2
454 mgorny 1.3 local fetch_command=( git fetch )
455 mgorny 1.4 if [[ ${nonshallow} ]]; then
456 mgorny 1.2 if [[ -f ${GIT_DIR}/shallow ]]; then
457     ref_param+=( --unshallow )
458     fi
459 mgorny 1.12 # fetch all branches
460     ref_param+=( "refs/heads/*:refs/remotes/origin/*" )
461 mgorny 1.1 else
462 mgorny 1.2 # '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 mgorny 1.3 else
466     fetch_command=( _git-r3_smart_fetch )
467 mgorny 1.2 fi
468 mgorny 1.1 fi
469    
470 mgorny 1.2 # 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 mgorny 1.1 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, ${ref[@]} will contain
483     # the respective commit id. otherwise, it will be an empty
484     # array, so the following won't evaluate to a parameter.
485 mgorny 1.3 set -- "${fetch_command[@]}" --no-tags "${r}" "${ref_param[@]}"
486 mgorny 1.1 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 ${subname}"
517     fi
518    
519     git-r3_fetch "${url}" "${commit}" "${local_id}/${subname}"
520    
521     submodules=( "${submodules[@]:3}" ) # shift
522     done
523     fi
524     }
525    
526     # @FUNCTION: git-r3_checkout
527     # @USAGE: [<repo-uri> [<checkout-path> [<local-id>]]]
528     # @DESCRIPTION:
529     # Check the previously fetched tree to the working copy.
530     #
531     # <repo-uri> specifies the repository URIs, as a space-separated list.
532     # The first URI will be used as repository group identifier
533     # and therefore must be used consistently with git-r3_fetch.
534     # The remaining URIs are not used and therefore may be omitted.
535     # When not specified, defaults to ${EGIT_REPO_URI}.
536     #
537     # <checkout-path> specifies the path to place the checkout. It defaults
538     # to ${EGIT_CHECKOUT_DIR} if set, otherwise to ${WORKDIR}/${P}.
539     #
540     # <local-id> needs to specify the local identifier that was used
541     # for respective git-r3_fetch.
542     #
543     # The checkout operation will write to the working copy, and export
544     # the repository state into the environment. If the repository contains
545     # submodules, they will be checked out recursively.
546     git-r3_checkout() {
547     debug-print-function ${FUNCNAME} "$@"
548    
549 mgorny 1.11 local repos
550     if [[ ${1} ]]; then
551     repos=( ${1} )
552     elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
553     repos=( "${EGIT_REPO_URI[@]}" )
554     else
555     repos=( ${EGIT_REPO_URI} )
556 mgorny 1.9 fi
557    
558 mgorny 1.1 local out_dir=${2:-${EGIT_CHECKOUT_DIR:-${WORKDIR}/${P}}}
559     local local_id=${3:-${CATEGORY}/${PN}/${SLOT}}
560    
561     local -x GIT_DIR GIT_WORK_TREE
562 mgorny 1.9 _git-r3_set_gitdir "${repos[0]}"
563 mgorny 1.1 GIT_WORK_TREE=${out_dir}
564 mgorny 1.17 mkdir -p "${GIT_WORK_TREE}" || die
565 mgorny 1.1
566     einfo "Checking out ${repos[0]} to ${out_dir} ..."
567    
568     if ! git cat-file -e refs/heads/"${local_id}"/__main__
569     then
570     if [[ ${EVCS_OFFLINE} ]]; then
571     die "No local clone of ${repos[0]}. Unable to work with EVCS_OFFLINE."
572     else
573     die "Logic error: no local clone of ${repos[0]}. git-r3_fetch not used?"
574     fi
575     fi
576    
577     set -- git checkout -f "${local_id}"/__main__ .
578     echo "${@}" >&2
579     "${@}" || die "git checkout ${local_id}/__main__ failed"
580    
581     # diff against previous revision (if any)
582     local new_commit_id=$(git rev-parse --verify "${local_id}"/__main__)
583     local old_commit_id=$(
584     git rev-parse --verify "${local_id}"/__old__ 2>/dev/null
585     )
586    
587     if [[ ! ${old_commit_id} ]]; then
588     echo "GIT NEW branch -->"
589     echo " repository: ${repos[0]}"
590     echo " at the commit: ${new_commit_id}"
591     else
592     echo "GIT update -->"
593     echo " repository: ${repos[0]}"
594     # write out message based on the revisions
595     if [[ "${old_commit_id}" != "${new_commit_id}" ]]; then
596     echo " updating from commit: ${old_commit_id}"
597     echo " to commit: ${new_commit_id}"
598    
599     git --no-pager diff --stat \
600     ${old_commit_id}..${new_commit_id}
601     else
602     echo " at the commit: ${new_commit_id}"
603     fi
604     fi
605     git branch -f "${local_id}"/{__old__,__main__} || die
606    
607     # recursively checkout submodules
608     if [[ -f ${GIT_WORK_TREE}/.gitmodules ]]; then
609     local submodules
610     _git-r3_set_submodules \
611     "$(<"${GIT_WORK_TREE}"/.gitmodules)"
612    
613     while [[ ${submodules[@]} ]]; do
614     local subname=${submodules[0]}
615     local url=${submodules[1]}
616     local path=${submodules[2]}
617    
618     git-r3_checkout "${url}" "${GIT_WORK_TREE}/${path}" \
619     "${local_id}/${subname}"
620    
621     submodules=( "${submodules[@]:3}" ) # shift
622     done
623     fi
624    
625     # keep this *after* submodules
626     export EGIT_DIR=${GIT_DIR}
627     export EGIT_VERSION=${new_commit_id}
628     }
629    
630     # @FUNCTION: git-r3_peek_remote_ref
631     # @USAGE: [<repo-uri> [<remote-ref>]]
632     # @DESCRIPTION:
633     # Peek the reference in the remote repository and print the matching
634     # (newest) commit SHA1.
635     #
636     # <repo-uri> specifies the repository URIs to fetch from, as a space-
637     # -separated list. When not specified, defaults to ${EGIT_REPO_URI}.
638     #
639     # <remote-ref> specifies the remote ref to peek. It is preferred to use
640     # 'refs/heads/<branch-name>' for branches and 'refs/tags/<tag-name>'
641     # for tags. Alternatively, 'HEAD' may be used for upstream default
642     # branch. Defaults to the first of EGIT_COMMIT, EGIT_BRANCH or literal
643     # 'HEAD' that is set to a non-null value.
644     #
645     # The operation will be done purely on the remote, without using local
646     # storage. If commit SHA1 is provided as <remote-ref>, the function will
647     # fail due to limitations of git protocol.
648     #
649     # On success, the function returns 0 and writes hexadecimal commit SHA1
650     # to stdout. On failure, the function returns 1.
651     git-r3_peek_remote_ref() {
652     debug-print-function ${FUNCNAME} "$@"
653    
654 mgorny 1.11 local repos
655     if [[ ${1} ]]; then
656     repos=( ${1} )
657     elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then
658     repos=( "${EGIT_REPO_URI[@]}" )
659     else
660     repos=( ${EGIT_REPO_URI} )
661 mgorny 1.9 fi
662    
663 mgorny 1.1 local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}}
664     local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}}
665    
666     [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset"
667    
668     local r success
669 mgorny 1.9 for r in "${repos[@]}"; do
670 mgorny 1.1 einfo "Peeking ${remote_ref} on ${r} ..." >&2
671    
672     local is_branch lookup_ref
673     if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]]
674     then
675     is_branch=1
676     lookup_ref=${remote_ref}
677     else
678     # ls-remote by commit is going to fail anyway,
679     # so we may as well pass refs/tags/ABCDEF...
680     lookup_ref=refs/tags/${remote_ref}
681     fi
682    
683     # split on whitespace
684     local ref=(
685     $(git ls-remote "${r}" "${lookup_ref}")
686     )
687    
688     if [[ ${ref[0]} ]]; then
689     echo "${ref[0]}"
690     return 0
691     fi
692     done
693    
694     return 1
695     }
696    
697     git-r3_src_fetch() {
698     debug-print-function ${FUNCNAME} "$@"
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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