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-rwxr-xr-xgit-fetch.sh484
1 files changed, 484 insertions, 0 deletions
diff --git a/git-fetch.sh b/git-fetch.sh
new file mode 100755
index 0000000000..ca984e739a
--- /dev/null
+++ b/git-fetch.sh
@@ -0,0 +1,484 @@
+#!/bin/sh
+#
+
+USAGE='<fetch-options> <repository> <refspec>...'
+SUBDIRECTORY_OK=Yes
+. git-sh-setup
+set_reflog_action "fetch $*"
+cd_to_toplevel ;# probably unnecessary...
+
+. git-parse-remote
+_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
+_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
+
+LF='
+'
+IFS="$LF"
+
+no_tags=
+tags=
+append=
+force=
+verbose=
+update_head_ok=
+exec=
+keep=
+shallow_depth=
+while case "$#" in 0) break ;; esac
+do
+ case "$1" in
+ -a|--a|--ap|--app|--appe|--appen|--append)
+ append=t
+ ;;
+ --upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
+ --upload-pa|--upload-pac|--upload-pack)
+ shift
+ exec="--upload-pack=$1"
+ ;;
+ --upl=*|--uplo=*|--uploa=*|--upload=*|\
+ --upload-=*|--upload-p=*|--upload-pa=*|--upload-pac=*|--upload-pack=*)
+ exec=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)')
+ shift
+ ;;
+ -f|--f|--fo|--for|--forc|--force)
+ force=t
+ ;;
+ -t|--t|--ta|--tag|--tags)
+ tags=t
+ ;;
+ -n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
+ no_tags=t
+ ;;
+ -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
+ --update-he|--update-hea|--update-head|--update-head-|\
+ --update-head-o|--update-head-ok)
+ update_head_ok=t
+ ;;
+ -v|--verbose)
+ verbose=Yes
+ ;;
+ -k|--k|--ke|--kee|--keep)
+ keep='-k -k'
+ ;;
+ --depth=*)
+ shallow_depth="--depth=`expr "z$1" : 'z-[^=]*=\(.*\)'`"
+ ;;
+ --depth)
+ shift
+ shallow_depth="--depth=$1"
+ ;;
+ -*)
+ usage
+ ;;
+ *)
+ break
+ ;;
+ esac
+ shift
+done
+
+case "$#" in
+0)
+ origin=$(get_default_remote)
+ test -n "$(get_remote_url ${origin})" ||
+ die "Where do you want to fetch from today?"
+ set x $origin ; shift ;;
+esac
+
+if test -z "$exec"
+then
+ # No command line override and we have configuration for the remote.
+ exec="--upload-pack=$(get_uploadpack $1)"
+fi
+
+remote_nick="$1"
+remote=$(get_remote_url "$@")
+refs=
+rref=
+rsync_slurped_objects=
+
+if test "" = "$append"
+then
+ : >"$GIT_DIR/FETCH_HEAD"
+fi
+
+# Global that is reused later
+ls_remote_result=$(git ls-remote $exec "$remote") ||
+ die "Cannot get the repository state from $remote"
+
+append_fetch_head () {
+ head_="$1"
+ remote_="$2"
+ remote_name_="$3"
+ remote_nick_="$4"
+ local_name_="$5"
+ case "$6" in
+ t) not_for_merge_='not-for-merge' ;;
+ '') not_for_merge_= ;;
+ esac
+
+ # remote-nick is the URL given on the command line (or a shorthand)
+ # remote-name is the $GIT_DIR relative refs/ path we computed
+ # for this refspec.
+
+ # the $note_ variable will be fed to git-fmt-merge-msg for further
+ # processing.
+ case "$remote_name_" in
+ HEAD)
+ note_= ;;
+ refs/heads/*)
+ note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
+ note_="branch '$note_' of " ;;
+ refs/tags/*)
+ note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
+ note_="tag '$note_' of " ;;
+ refs/remotes/*)
+ note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
+ note_="remote branch '$note_' of " ;;
+ *)
+ note_="$remote_name of " ;;
+ esac
+ remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
+ remote_="$remote_1_"
+ note_="$note_$remote_"
+
+ # 2.6.11-tree tag would not be happy to be fed to resolve.
+ if git-cat-file commit "$head_" >/dev/null 2>&1
+ then
+ headc_=$(git-rev-parse --verify "$head_^0") || exit
+ echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
+ else
+ echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
+ fi
+
+ update_local_ref "$local_name_" "$head_" "$note_"
+}
+
+update_local_ref () {
+ # If we are storing the head locally make sure that it is
+ # a fast forward (aka "reverse push").
+
+ label_=$(git-cat-file -t $2)
+ newshort_=$(git-rev-parse --short $2)
+ if test -z "$1" ; then
+ [ "$verbose" ] && echo >&2 "* fetched $3"
+ [ "$verbose" ] && echo >&2 " $label_: $newshort_"
+ return 0
+ fi
+ oldshort_=$(git show-ref --hash --abbrev "$1" 2>/dev/null)
+
+ case "$1" in
+ refs/tags/*)
+ # Tags need not be pointing at commits so there
+ # is no way to guarantee "fast-forward" anyway.
+ if test -n "$oldshort_"
+ then
+ if now_=$(git show-ref --hash "$1") && test "$now_" = "$2"
+ then
+ [ "$verbose" ] && echo >&2 "* $1: same as $3"
+ [ "$verbose" ] && echo >&2 " $label_: $newshort_" ||:
+ else
+ echo >&2 "* $1: updating with $3"
+ echo >&2 " $label_: $newshort_"
+ git-update-ref -m "$GIT_REFLOG_ACTION: updating tag" "$1" "$2"
+ fi
+ else
+ echo >&2 "* $1: storing $3"
+ echo >&2 " $label_: $newshort_"
+ git-update-ref -m "$GIT_REFLOG_ACTION: storing tag" "$1" "$2"
+ fi
+ ;;
+
+ refs/heads/* | refs/remotes/*)
+ # $1 is the ref being updated.
+ # $2 is the new value for the ref.
+ local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
+ if test "$local"
+ then
+ # Require fast-forward.
+ mb=$(git-merge-base "$local" "$2") &&
+ case "$2,$mb" in
+ $local,*)
+ if test -n "$verbose"
+ then
+ echo >&2 "* $1: same as $3"
+ echo >&2 " $label_: $newshort_"
+ fi
+ ;;
+ *,$local)
+ echo >&2 "* $1: fast forward to $3"
+ echo >&2 " old..new: $oldshort_..$newshort_"
+ git-update-ref -m "$GIT_REFLOG_ACTION: fast-forward" "$1" "$2" "$local"
+ ;;
+ *)
+ false
+ ;;
+ esac || {
+ case ",$force,$single_force," in
+ *,t,*)
+ echo >&2 "* $1: forcing update to non-fast forward $3"
+ echo >&2 " old...new: $oldshort_...$newshort_"
+ git-update-ref -m "$GIT_REFLOG_ACTION: forced-update" "$1" "$2" "$local"
+ ;;
+ *)
+ echo >&2 "* $1: not updating to non-fast forward $3"
+ echo >&2 " old...new: $oldshort_...$newshort_"
+ exit 1
+ ;;
+ esac
+ }
+ else
+ echo >&2 "* $1: storing $3"
+ echo >&2 " $label_: $newshort_"
+ git-update-ref -m "$GIT_REFLOG_ACTION: storing head" "$1" "$2"
+ fi
+ ;;
+ esac
+}
+
+# updating the current HEAD with git-fetch in a bare
+# repository is always fine.
+if test -z "$update_head_ok" && test $(is_bare_repository) = false
+then
+ orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
+fi
+
+# If --tags (and later --heads or --all) is specified, then we are
+# not talking about defaults stored in Pull: line of remotes or
+# branches file, and just fetch those and refspecs explicitly given.
+# Otherwise we do what we always did.
+
+reflist=$(get_remote_refs_for_fetch "$@")
+if test "$tags"
+then
+ taglist=`IFS=' ' &&
+ echo "$ls_remote_result" |
+ git-show-ref --exclude-existing=refs/tags/ |
+ while read sha1 name
+ do
+ echo ".${name}:${name}"
+ done` || exit
+ if test "$#" -gt 1
+ then
+ # remote URL plus explicit refspecs; we need to merge them.
+ reflist="$reflist$LF$taglist"
+ else
+ # No explicit refspecs; fetch tags only.
+ reflist=$taglist
+ fi
+fi
+
+fetch_main () {
+ reflist="$1"
+ refs=
+ rref=
+
+ for ref in $reflist
+ do
+ refs="$refs$LF$ref"
+
+ # These are relative path from $GIT_DIR, typically starting at refs/
+ # but may be HEAD
+ if expr "z$ref" : 'z\.' >/dev/null
+ then
+ not_for_merge=t
+ ref=$(expr "z$ref" : 'z\.\(.*\)')
+ else
+ not_for_merge=
+ fi
+ if expr "z$ref" : 'z+' >/dev/null
+ then
+ single_force=t
+ ref=$(expr "z$ref" : 'z+\(.*\)')
+ else
+ single_force=
+ fi
+ remote_name=$(expr "z$ref" : 'z\([^:]*\):')
+ local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
+
+ rref="$rref$LF$remote_name"
+
+ # There are transports that can fetch only one head at a time...
+ case "$remote" in
+ http://* | https://* | ftp://*)
+ test -n "$shallow_depth" &&
+ die "shallow clone with http not supported"
+ proto=`expr "$remote" : '\([^:]*\):'`
+ if [ -n "$GIT_SSL_NO_VERIFY" ]; then
+ curl_extra_args="-k"
+ fi
+ if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
+ "`git-config --bool http.noEPSV`" = true ]; then
+ noepsv_opt="--disable-epsv"
+ fi
+
+ # Find $remote_name from ls-remote output.
+ head=$(
+ IFS=' '
+ echo "$ls_remote_result" |
+ while read sha1 name
+ do
+ test "z$name" = "z$remote_name" || continue
+ echo "$sha1"
+ break
+ done
+ )
+ expr "z$head" : "z$_x40\$" >/dev/null ||
+ die "No such ref $remote_name at $remote"
+ echo >&2 "Fetching $remote_name from $remote using $proto"
+ git-http-fetch -v -a "$head" "$remote/" || exit
+ ;;
+ rsync://*)
+ test -n "$shallow_depth" &&
+ die "shallow clone with rsync not supported"
+ TMP_HEAD="$GIT_DIR/TMP_HEAD"
+ rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
+ head=$(git-rev-parse --verify TMP_HEAD)
+ rm -f "$TMP_HEAD"
+ test "$rsync_slurped_objects" || {
+ rsync -av --ignore-existing --exclude info \
+ "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
+
+ # Look at objects/info/alternates for rsync -- http will
+ # support it natively and git native ones will do it on
+ # the remote end. Not having that file is not a crime.
+ rsync -q "$remote/objects/info/alternates" \
+ "$GIT_DIR/TMP_ALT" 2>/dev/null ||
+ rm -f "$GIT_DIR/TMP_ALT"
+ if test -f "$GIT_DIR/TMP_ALT"
+ then
+ resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
+ while read alt
+ do
+ case "$alt" in 'bad alternate: '*) die "$alt";; esac
+ echo >&2 "Getting alternate: $alt"
+ rsync -av --ignore-existing --exclude info \
+ "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
+ done
+ rm -f "$GIT_DIR/TMP_ALT"
+ fi
+ rsync_slurped_objects=t
+ }
+ ;;
+ *)
+ # We will do git native transport with just one call later.
+ continue ;;
+ esac
+
+ append_fetch_head "$head" "$remote" \
+ "$remote_name" "$remote_nick" "$local_name" "$not_for_merge" || exit
+
+ done
+
+ case "$remote" in
+ http://* | https://* | ftp://* | rsync://* )
+ ;; # we are already done.
+ *)
+ ( : subshell because we muck with IFS
+ IFS=" $LF"
+ (
+ git-fetch-pack --thin $exec $keep $shallow_depth "$remote" $rref ||
+ echo failed "$remote"
+ ) |
+ (
+ trap '
+ if test -n "$keepfile" && test -f "$keepfile"
+ then
+ rm -f "$keepfile"
+ fi
+ ' 0
+
+ keepfile=
+ while read sha1 remote_name
+ do
+ case "$sha1" in
+ failed)
+ echo >&2 "Fetch failure: $remote"
+ exit 1 ;;
+ # special line coming from index-pack with the pack name
+ pack)
+ continue ;;
+ keep)
+ keepfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
+ continue ;;
+ esac
+ found=
+ single_force=
+ for ref in $refs
+ do
+ case "$ref" in
+ +$remote_name:*)
+ single_force=t
+ not_for_merge=
+ found="$ref"
+ break ;;
+ .+$remote_name:*)
+ single_force=t
+ not_for_merge=t
+ found="$ref"
+ break ;;
+ .$remote_name:*)
+ not_for_merge=t
+ found="$ref"
+ break ;;
+ $remote_name:*)
+ not_for_merge=
+ found="$ref"
+ break ;;
+ esac
+ done
+ local_name=$(expr "z$found" : 'z[^:]*:\(.*\)')
+ append_fetch_head "$sha1" "$remote" \
+ "$remote_name" "$remote_nick" "$local_name" \
+ "$not_for_merge" || exit
+ done
+ )
+ ) || exit ;;
+ esac
+
+}
+
+fetch_main "$reflist" || exit
+
+# automated tag following
+case "$no_tags$tags" in
+'')
+ case "$reflist" in
+ *:refs/*)
+ # effective only when we are following remote branch
+ # using local tracking branch.
+ taglist=$(IFS=' ' &&
+ echo "$ls_remote_result" |
+ git-show-ref --exclude-existing=refs/tags/ |
+ while read sha1 name
+ do
+ git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
+ echo >&2 "Auto-following $name"
+ echo ".${name}:${name}"
+ done)
+ esac
+ case "$taglist" in
+ '') ;;
+ ?*)
+ # do not deepen a shallow tree when following tags
+ shallow_depth=
+ fetch_main "$taglist" || exit ;;
+ esac
+esac
+
+# If the original head was empty (i.e. no "master" yet), or
+# if we were told not to worry, we do not have to check.
+case "$orig_head" in
+'')
+ ;;
+?*)
+ curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
+ if test "$curr_head" != "$orig_head"
+ then
+ git-update-ref \
+ -m "$GIT_REFLOG_ACTION: Undoing incorrectly fetched HEAD." \
+ HEAD "$orig_head"
+ die "Cannot fetch into the current branch."
+ fi
+ ;;
+esac
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-20 14:09:52 +0000