cherry-pick: Suggest a better method to retain authorship
[gitweb.git] / git-fetch.sh
index 4eecf148ea90c02bfe9f2aa018118ccbd26f8e97..59bee5db0f0738cd6d43772e7279edf726a0b7d1 100755 (executable)
@@ -2,7 +2,11 @@
 #
 
 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$_x40"
@@ -11,7 +15,6 @@ LF='
 '
 IFS="$LF"
 
-rloga=fetch
 no_tags=
 tags=
 append=
@@ -19,8 +22,8 @@ force=
 verbose=
 update_head_ok=
 exec=
-upload_pack=
 keep=
+shallow_depth=
 while case "$#" in 0) break ;; esac
 do
        case "$1" in
@@ -30,8 +33,12 @@ do
        --upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
        --upload-pa|--upload-pac|--upload-pack)
                shift
-               exec="--exec=$1" 
-               upload_pack="-u $1"
+               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
@@ -53,8 +60,12 @@ do
        -k|--k|--ke|--kee|--keep)
                keep='-k -k'
                ;;
-       --reflog-action=*)
-               rloga=`expr "z$1" : 'z-[^=]*=\(.*\)'`
+       --depth=*)
+               shallow_depth="--depth=`expr "z$1" : 'z-[^=]*=\(.*\)'`"
+               ;;
+       --depth)
+               shift
+               shallow_depth="--depth=$1"
                ;;
        -*)
                usage
@@ -74,23 +85,26 @@ case "$#" in
        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=
 
-rloga="$rloga $remote_nick"
-test "$remote_nick" = "$remote" || rloga="$rloga $remote"
-
 if test "" = "$append"
 then
        : >"$GIT_DIR/FETCH_HEAD"
 fi
 
 # Global that is reused later
-ls_remote_result=$(git ls-remote $upload_pack "$remote") ||
-       die "Cannot find the reflist at $remote"
+ls_remote_result=$(git ls-remote $exec "$remote") ||
+       die "Cannot get the repository state from $remote"
 
 append_fetch_head () {
     head_="$1"
@@ -166,12 +180,12 @@ update_local_ref () {
                else
                        echo >&2 "* $1: updating with $3"
                        echo >&2 "  $label_: $newshort_"
-                       git-update-ref -m "$rloga: updating tag" "$1" "$2"
+                       git-update-ref -m "$GIT_REFLOG_ACTION: updating tag" "$1" "$2"
                fi
        else
                echo >&2 "* $1: storing $3"
                echo >&2 "  $label_: $newshort_"
-               git-update-ref -m "$rloga: storing tag" "$1" "$2"
+               git-update-ref -m "$GIT_REFLOG_ACTION: storing tag" "$1" "$2"
        fi
        ;;
 
@@ -194,7 +208,7 @@ update_local_ref () {
            *,$local)
                echo >&2 "* $1: fast forward to $3"
                echo >&2 "  old..new: $oldshort_..$newshort_"
-               git-update-ref -m "$rloga: fast-forward" "$1" "$2" "$local"
+               git-update-ref -m "$GIT_REFLOG_ACTION: fast-forward" "$1" "$2" "$local"
                ;;
            *)
                false
@@ -204,7 +218,7 @@ update_local_ref () {
                *,t,*)
                        echo >&2 "* $1: forcing update to non-fast forward $3"
                        echo >&2 "  old...new: $oldshort_...$newshort_"
-                       git-update-ref -m "$rloga: forced-update" "$1" "$2" "$local"
+                       git-update-ref -m "$GIT_REFLOG_ACTION: forced-update" "$1" "$2" "$local"
                        ;;
                *)
                        echo >&2 "* $1: not updating to non-fast forward $3"
@@ -216,16 +230,26 @@ update_local_ref () {
        else
            echo >&2 "* $1: storing $3"
            echo >&2 "  $label_: $newshort_"
-           git-update-ref -m "$rloga: storing head" "$1" "$2"
+           git-update-ref -m "$GIT_REFLOG_ACTION: storing head" "$1" "$2"
        fi
        ;;
     esac
 }
 
-case "$update_head_ok" in
-'')
+# updating the current HEAD with git-fetch in a bare
+# repository is always fine.
+if test -z "$update_head_ok" && test $(is_bare_repository) = false
+then
        orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
-       ;;
+fi
+
+# Allow --notags from remote.$1.tagopt
+case "$tags$no_tags" in
+'')
+       case "$(git-config --get "remote.$1.tagopt")" in
+       --no-tags)
+               no_tags=t ;;
+       esac
 esac
 
 # If --tags (and later --heads or --all) is specified, then we are
@@ -236,25 +260,12 @@ esac
 reflist=$(get_remote_refs_for_fetch "$@")
 if test "$tags"
 then
-       taglist=`IFS="  " &&
+       taglist=`IFS='  ' &&
                  echo "$ls_remote_result" |
+                 git-show-ref --exclude-existing=refs/tags/ |
                  while read sha1 name
                  do
-                       case "$sha1" in
-                       fail)
-                               exit 1
-                       esac
-                       case "$name" in
-                       *^*) continue ;;
-                       refs/tags/*) ;;
-                       *) continue ;;
-                       esac
-                       if git-check-ref-format "$name"
-                       then
-                           echo ".${name}:${name}"
-                       else
-                           echo >&2 "warning: tag ${name} ignored"
-                       fi
+                       echo ".${name}:${name}"
                  done` || exit
        if test "$#" -gt 1
        then
@@ -299,12 +310,14 @@ fetch_main () {
       # 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-repo-config --bool http.noEPSV`" = true ]; then
+               "`git-config --bool http.noEPSV`" = true ]; then
              noepsv_opt="--disable-epsv"
          fi
 
@@ -325,6 +338,8 @@ fetch_main () {
          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)
@@ -369,13 +384,29 @@ fetch_main () {
       ;; # we are already done.
   *)
     ( : subshell because we muck with IFS
-      pack_lockfile=
       IFS="    $LF"
       (
-         git-fetch-pack --thin $exec $keep "$remote" $rref || echo failed "$remote"
+       if test -f "$remote" ; then
+           test -n "$shallow_depth" &&
+               die "shallow clone with bundle is not supported"
+           git-bundle unbundle "$remote" $rref ||
+           echo failed "$remote"
+       else
+         git-fetch-pack --thin $exec $keep $shallow_depth "$remote" $rref ||
+         echo failed "$remote"
+       fi
       ) |
-      while read sha1 remote_name
-      do
+      (
+       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: $remote"
@@ -384,7 +415,7 @@ fetch_main () {
          pack)
                  continue ;;
          keep)
-                 pack_lockfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
+                 keepfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
                  continue ;;
          esac
          found=
@@ -416,8 +447,8 @@ fetch_main () {
          append_fetch_head "$sha1" "$remote" \
                  "$remote_name" "$remote_nick" "$local_name" \
                  "$not_for_merge" || exit
-      done &&
-      if [ "$pack_lockfile" ]; then rm -f "$pack_lockfile"; fi
+        done
+      )
     ) || exit ;;
   esac
 
@@ -432,17 +463,11 @@ case "$no_tags$tags" in
        *:refs/*)
                # effective only when we are following remote branch
                # using local tracking branch.
-               taglist=$(IFS=" " &&
+               taglist=$(IFS=' ' &&
                echo "$ls_remote_result" |
-               sed -n  -e 's|^\('"$_x40"'\)    \(refs/tags/.*\)^{}$|\1 \2|p' \
-                       -e 's|^\('"$_x40"'\)    \(refs/tags/.*\)$|\1 \2|p' |
+               git-show-ref --exclude-existing=refs/tags/ |
                while read sha1 name
                do
-                       git-show-ref --verify --quiet -- "$name" && continue
-                       git-check-ref-format "$name" || {
-                               echo >&2 "warning: tag ${name} ignored"
-                               continue
-                       }
                        git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
                        echo >&2 "Auto-following $name"
                        echo ".${name}:${name}"
@@ -451,6 +476,8 @@ case "$no_tags$tags" in
        case "$taglist" in
        '') ;;
        ?*)
+               # do not deepen a shallow tree when following tags
+               shallow_depth=
                fetch_main "$taglist" || exit ;;
        esac
 esac
@@ -465,7 +492,7 @@ case "$orig_head" in
        if test "$curr_head" != "$orig_head"
        then
            git-update-ref \
-                       -m "$rloga: Undoing incorrectly fetched HEAD." \
+                       -m "$GIT_REFLOG_ACTION: Undoing incorrectly fetched HEAD." \
                        HEAD "$orig_head"
                die "Cannot fetch into the current branch."
        fi