[libvirt] [PATCH] build: honor autogen.sh --no-git

Based on a report by Chandrashekar Shastri, at https://bugzilla.redhat.com/show_bug.cgi?id=979360 On systems where git cannot access the outside world, a developer can instead arrange to get a copy of gnulib at the right commit via side channels (such as NFS share drives), set GNULIB_SRCDIR, then use ./autogen.sh --no-git. In this setup, we will now avoid direct use of git. Of course, this means no automatic gnulib updates when libvirt.git updates its submodule, but it is expected that any developer in such a situation is already prepared to deal with the fallout. * .gnulib: Update to latest, for bootstrap. * bootstrap: Synchronize from gnulib. * autogen.sh (no_git): Avoid git when requested. * cfg.mk (_update_required): Skip automatic rerun of bootstrap if we can't use git. Signed-off-by: Eric Blake <eblake(a)redhat.com&gt; --- This does not qualify as a build-breaker, and although it touches gnulib, it is complex enough that I'm not quite willing to push it under my carte-blanche rule for gnulib updates outside of freezes. So, if anyone is willing to review, great; if not, I'll probably still push on Monday, as it did pass my testing. * .gnulib f40e61e...b72ff2a (1): .gnulib | 2 +- autogen.sh | 10 ++++++++-- bootstrap | 21 ++++++++++++++------- cfg.mk | 1 + 4 files changed, 24 insertions(+), 10 deletions(-) diff --git a/.gnulib b/.gnulib index f40e61e..b72ff2a 160000 --- a/.gnulib +++ b/.gnulib @@ -1 +1 @@ -Subproject commit f40e61ea0c4940b027aade7dd48948aa93f133a4 +Subproject commit b72ff2a45efde544c406804186d37a3254728571 diff --git a/autogen.sh b/autogen.sh index d4957f1..42e5608 100755 --- a/autogen.sh +++ b/autogen.sh @@ -49,6 +49,10 @@ fi # we rerun bootstrap to pull in those diffs. bootstrap_hash() { + if test "$no_git"; then + echo no-git + return + fi git submodule status | sed 's/^[ +-]//;s/ .*//' git hash-object bootstrap.conf git ls-tree -d HEAD gnulib/local | awk '{print $3}' @@ -62,7 +66,9 @@ bootstrap_hash() # Only run bootstrap from a git checkout, never from a tarball. if test -d .git; then curr_status=.git-module-status t= - if test -d .gnulib; then + if test "$no_git"; then + t=no-git + elif test -d .gnulib; then t=$(bootstrap_hash; git diff .gnulib) fi case $t:${CLEAN_SUBMODULE+set} in @@ -78,7 +84,7 @@ if test -d .git; then # good, it's up to date, all we need is autoreconf autoreconf -if else - if test ${CLEAN_SUBMODULE+set}; then + if test -z "$no_git" && test ${CLEAN_SUBMODULE+set}; then echo cleaning up submodules... git submodule foreach 'git clean -dfqx && git reset --hard' fi diff --git a/bootstrap b/bootstrap index 0cbea66..9c52204 100755 --- a/bootstrap +++ b/bootstrap @@ -1,6 +1,6 @@ #! /bin/sh # Print a version string. -scriptversion=2013-05-08.20; # UTC +scriptversion=2013-07-03.20; # UTC # Bootstrap this package from checked-out sources. @@ -551,7 +551,7 @@ fi echo "$0: Bootstrapping from checked-out $package sources..." # See if we can use gnulib's git-merge-changelog merge driver. -if test -d .git && (git --version) >/dev/null 2>/dev/null ; then +if $use_git && test -d .git && (git --version) >/dev/null 2>/dev/null ; then if git config merge.merge-changelog.driver >/dev/null ; then : elif (git-merge-changelog --version) >/dev/null 2>/dev/null ; then @@ -574,13 +574,17 @@ git_modules_config () { test -f .gitmodules && git config --file .gitmodules "$@" } -gnulib_path=$(git_modules_config submodule.gnulib.path) -test -z "$gnulib_path" && gnulib_path=gnulib +if $use_git; then + gnulib_path=$(git_modules_config submodule.gnulib.path) + test -z "$gnulib_path" && gnulib_path=gnulib +fi -# Get gnulib files. +# Get gnulib files. Populate $GNULIB_SRCDIR, possibly updating a +# submodule, for use in the rest of the script. case ${GNULIB_SRCDIR--} in -) + # Note that $use_git is necessarily true in this case. if git_modules_config submodule.gnulib.url >/dev/null; then echo "$0: getting gnulib files..." git submodule init || exit $? @@ -601,8 +605,8 @@ case ${GNULIB_SRCDIR--} in GNULIB_SRCDIR=$gnulib_path ;; *) - # Use GNULIB_SRCDIR as a reference. - if test -d "$GNULIB_SRCDIR"/.git && \ + # Use GNULIB_SRCDIR directly or as a reference. + if $use_git && test -d "$GNULIB_SRCDIR"/.git && \ git_modules_config submodule.gnulib.url >/dev/null; then echo "$0: getting gnulib files..." if git submodule -h|grep -- --reference > /dev/null; then @@ -628,6 +632,9 @@ case ${GNULIB_SRCDIR--} in ;; esac +# $GNULIB_SRCDIR now points to the version of gnulib to use, and +# we no longer need to use git or $gnulib_path below here. + if $bootstrap_sync; then cmp -s "$0" "$GNULIB_SRCDIR/build-aux/bootstrap" || { echo "$0: updating bootstrap and restarting..." diff --git a/cfg.mk b/cfg.mk index bbe84b3..147e788 100644 --- a/cfg.mk +++ b/cfg.mk @@ -828,6 +828,7 @@ ifeq (0,$(MAKELEVEL)) test -d .git || { echo 0; exit; }; \ test -f po/Makevars || { echo 1; exit; }; \ test -f AUTHORS || { echo 1; exit; }; \ + test "no-git" = "$$(cat $(_curr_status))" && { echo 0; exit; }; \ actual=$$(git submodule status | $(_submodule_hash); \ git hash-object bootstrap.conf; \ git ls-tree -d HEAD gnulib/local | awk '{print $$3}'; \ -- 1.8.1.4