git-svn: add the commit-diff command
[gitweb.git] / git-clone.sh
index dc0ad552a322d46f48bee2c8d324285a63a9b8c7..6a14b2591136d0bbfbec333c2304a7f003134ac2 100755 (executable)
@@ -9,7 +9,7 @@
 unset CDPATH
 
 usage() {
-       echo >&2 "Usage: $0 [--bare] [-l [-s]] [-q] [-u <upload-pack>] [-o <name>] [-n] <repo> [<dir>]"
+       echo >&2 "Usage: $0 [--template=<template_directory>] [--use-separate-remote] [--reference <reference-repo>] [--bare] [-l [-s]] [-q] [-u <upload-pack>] [--origin <name>] [-n] <repo> [<dir>]"
        exit 1
 }
 
@@ -29,7 +29,7 @@ http_fetch () {
 clone_dumb_http () {
        # $1 - remote, $2 - local
        cd "$2" &&
-       clone_tmp='.git/clone-tmp' &&
+       clone_tmp="$GIT_DIR/clone-tmp" &&
        mkdir -p "$clone_tmp" || exit 1
        http_fetch "$1/info/refs" "$clone_tmp/refs" || {
                echo >&2 "Cannot get remote repository information.
@@ -38,24 +38,78 @@ Perhaps git-update-server-info needs to be run there?"
        }
        while read sha1 refname
        do
-               name=`expr "$refname" : 'refs/\(.*\)'` &&
+               name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
                case "$name" in
-               *^*)    ;;
-               *)
-                       git-http-fetch -v -a -w "$name" "$name" "$1/" || exit 1
+               *^*)    continue;;
                esac
+               if test -n "$use_separate_remote" &&
+                  branch_name=`expr "z$name" : 'zheads/\(.*\)'`
+               then
+                       tname="remotes/$origin/$branch_name"
+               else
+                       tname=$name
+               fi
+               git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
        done <"$clone_tmp/refs"
        rm -fr "$clone_tmp"
+       http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
+       rm -f "$GIT_DIR/REMOTE_HEAD"
+}
+
+# Read git-fetch-pack -k output and store the remote branches.
+copy_refs='
+use File::Path qw(mkpath);
+use File::Basename qw(dirname);
+my $git_dir = $ARGV[0];
+my $use_separate_remote = $ARGV[1];
+my $origin = $ARGV[2];
+
+my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
+my $tag_top = "tags";
+
+sub store {
+       my ($sha1, $name, $top) = @_;
+       $name = "$git_dir/refs/$top/$name";
+       mkpath(dirname($name));
+       open O, ">", "$name";
+       print O "$sha1\n";
+       close O;
 }
 
+open FH, "<", "$git_dir/CLONE_HEAD";
+while (<FH>) {
+       my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
+       next if ($name =~ /\^\173/);
+       if ($name eq "HEAD") {
+               open O, ">", "$git_dir/REMOTE_HEAD";
+               print O "$sha1\n";
+               close O;
+               next;
+       }
+       if ($name =~ s/^refs\/heads\///) {
+               store($sha1, $name, $branch_top);
+               next;
+       }
+       if ($name =~ s/^refs\/tags\///) {
+               store($sha1, $name, $tag_top);
+               next;
+       }
+}
+close FH;
+'
+
 quiet=
+local=no
 use_local=no
 local_shared=no
+unset template
 no_checkout=
 upload_pack=
 bare=
-origin=origin
+reference=
+origin=
 origin_override=
+use_separate_remote=
 while
        case "$#,$1" in
        0,*) break ;;
@@ -67,15 +121,33 @@ while
        *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared) 
           local_shared=yes; use_local=yes ;;
+       1,--template) usage ;;
+       *,--template)
+               shift; template="--template=$1" ;;
+       *,--template=*)
+         template="$1" ;;
        *,-q|*,--quiet) quiet=-q ;;
-       1,-o) usage;;
-       *,-o)
-               git-check-ref-format "$2" || {
+       *,--use-separate-remote)
+               use_separate_remote=t ;;
+       1,--reference) usage ;;
+       *,--reference)
+               shift; reference="$1" ;;
+       *,--reference=*)
+               reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
+       *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
+               case "$2" in
+               '')
+                   usage ;;
+               */*)
+                   echo >&2 "'$2' is not suitable for an origin name"
+                   exit 1
+               esac
+               git-check-ref-format "heads/$2" || {
                    echo >&2 "'$2' is not suitable for a branch name"
                    exit 1
                }
                test -z "$origin_override" || {
-                   echo >&2 "Do not give more than one -o options."
+                   echo >&2 "Do not give more than one --origin options."
                    exit 1
                }
                origin_override=yes
@@ -92,21 +164,36 @@ do
        shift
 done
 
+repo="$1"
+if test -z "$repo"
+then
+    echo >&2 'you must specify a repository to clone.'
+    exit 1
+fi
+
 # --bare implies --no-checkout
 if test yes = "$bare"
 then
        if test yes = "$origin_override"
        then
-               echo >&2 '--bare and -o $origin options are incompatible.'
+               echo >&2 '--bare and --origin $origin options are incompatible.'
+               exit 1
+       fi
+       if test t = "$use_separate_remote"
+       then
+               echo >&2 '--bare and --use-separate-remote options are incompatible.'
                exit 1
        fi
        no_checkout=yes
 fi
 
+if test -z "$origin"
+then
+       origin=origin
+fi
+
 # Turn the source into an absolute path if
 # it is local
-repo="$1"
-local=no
 if base=$(get_repo_base "$repo"); then
        repo="$base"
        local=yes
@@ -118,17 +205,35 @@ dir="$2"
 [ -e "$dir" ] && echo "$dir already exists." && usage
 mkdir -p "$dir" &&
 D=$(cd "$dir" && pwd) &&
-trap 'err=$?; rm -r $D; exit $err' exit
-case "$bare" in
-yes) GIT_DIR="$D" ;;
-*) GIT_DIR="$D/.git" ;;
-esac && export GIT_DIR && git-init-db || usage
+trap 'err=$?; cd ..; rm -r "$D"; exit $err' 0
 case "$bare" in
 yes)
        GIT_DIR="$D" ;;
 *)
        GIT_DIR="$D/.git" ;;
-esac
+esac && export GIT_DIR && git-init-db ${template+"$template"} || usage
+
+if test -n "$reference"
+then
+       if test -d "$reference"
+       then
+               if test -d "$reference/.git/objects"
+               then
+                       reference="$reference/.git"
+               fi
+               reference=$(cd "$reference" && pwd)
+               echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
+               (cd "$reference" && tar cf - refs) |
+               (cd "$GIT_DIR/refs" &&
+                mkdir reference-tmp &&
+                cd reference-tmp &&
+                tar xf -)
+       else
+               echo >&2 "$reference: not a local directory." && usage
+       fi
+fi
+
+rm -f "$GIT_DIR/CLONE_HEAD"
 
 # We do local magic only when the user tells us to.
 case "$local,$use_local" in
@@ -158,31 +263,17 @@ yes,yes)
            ;;
        yes)
            mkdir -p "$GIT_DIR/objects/info"
-           {
-               test -f "$repo/objects/info/alternates" &&
-               cat "$repo/objects/info/alternates";
-               echo "$repo/objects"
-           } >"$GIT_DIR/objects/info/alternates"
+           echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
            ;;
        esac
-
-       # Make a duplicate of refs and HEAD pointer
-       HEAD=
-       if test -f "$repo/HEAD"
-       then
-               HEAD=HEAD
-       fi
-       (cd "$repo" && tar cf - refs $HEAD) |
-       (cd "$GIT_DIR" && tar xf -) || exit 1
+       git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
        ;;
 *)
        case "$repo" in
        rsync://*)
                rsync $quiet -av --ignore-existing  \
-                       --exclude info "$repo/objects/" "$GIT_DIR/objects/" &&
-               rsync $quiet -av --ignore-existing  \
-                       --exclude info "$repo/refs/" "$GIT_DIR/refs/" || exit
-
+                       --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
+               exit
                # Look at objects/info/alternates for rsync -- http will
                # support it natively and git native ones will do it on the
                # remote end.  Not having that file is not a crime.
@@ -205,6 +296,7 @@ yes,yes)
                    done
                    rm -f "$GIT_DIR/TMP_ALT"
                fi
+               git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
                ;;
        http://*)
                if test -z "@@NO_CURL@@"
@@ -217,45 +309,110 @@ yes,yes)
                ;;
        *)
                cd "$D" && case "$upload_pack" in
-               '') git-clone-pack $quiet "$repo" ;;
-               *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
-               esac || {
-                       echo >&2 "clone-pack from '$repo' failed."
+               '') git-fetch-pack --all -k $quiet "$repo" ;;
+               *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
+               esac >"$GIT_DIR/CLONE_HEAD" || {
+                       echo >&2 "fetch-pack from '$repo' failed."
                        exit 1
                }
                ;;
        esac
        ;;
 esac
+test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
+
+if test -f "$GIT_DIR/CLONE_HEAD"
+then
+       # Read git-fetch-pack -k output and store the remote branches.
+       perl -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin"
+fi
 
 cd "$D" || exit
 
-if test -f "$GIT_DIR/HEAD" && test -z "$bare"
+if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 then
-       head_points_at=`git-symbolic-ref HEAD`
+       # Figure out which remote branch HEAD points at.
+       case "$use_separate_remote" in
+       '')     remote_top=refs/heads ;;
+       *)      remote_top="refs/remotes/$origin" ;;
+       esac
+
+       head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
+       case "$head_sha1" in
+       'ref: refs/'*)
+               # Uh-oh, the remote told us (http transport done against
+               # new style repository with a symref HEAD).
+               # Ideally we should skip the guesswork but for now
+               # opt for minimum change.
+               head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
+               head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
+               ;;
+       esac
+
+       # The name under $remote_top the remote HEAD seems to point at.
+       head_points_at=$(
+               (
+                       echo "master"
+                       cd "$GIT_DIR/$remote_top" &&
+                       find . -type f -print | sed -e 's/^\.\///'
+               ) | (
+               done=f
+               while read name
+               do
+                       test t = $done && continue
+                       branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
+                       if test "$head_sha1" = "$branch_tip"
+                       then
+                               echo "$name"
+                               done=t
+                       fi
+               done
+               )
+       )
+
+       # Write out remotes/$origin file, and update our "$head_points_at".
        case "$head_points_at" in
-       refs/heads/*)
-               head_points_at=`expr "$head_points_at" : 'refs/heads/\(.*\)'`
+       ?*)
                mkdir -p "$GIT_DIR/remotes" &&
-               echo >"$GIT_DIR/remotes/origin" \
+               git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
+               case "$use_separate_remote" in
+               t)      origin_track="$remote_top/$head_points_at"
+                       git-update-ref HEAD "$head_sha1" ;;
+               *)      origin_track="$remote_top/$origin"
+                       git-update-ref "refs/heads/$origin" "$head_sha1" ;;
+               esac &&
+               echo >"$GIT_DIR/remotes/$origin" \
                "URL: $repo
-Pull: $head_points_at:$origin" &&
-               git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) &&
-               (cd "$GIT_DIR" && find "refs/heads" -type f -print) |
-               while read ref
+Pull: refs/heads/$head_points_at:$origin_track" &&
+               (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
+               while read dotslref
                do
-                       head=`expr "$ref" : 'refs/heads/\(.*\)'` &&
-                       test "$head_points_at" = "$head" ||
-                       test "$origin" = "$head" ||
-                       echo "Pull: ${head}:${head}"
-               done >>"$GIT_DIR/remotes/origin"
+                       name=`expr "$dotslref" : './\(.*\)'`
+                       if test "z$head_points_at" = "z$name"
+                       then
+                               continue
+                       fi
+                       if test "$use_separate_remote" = '' &&
+                          test "z$origin" = "z$name"
+                       then
+                               continue
+                       fi
+                       echo "Pull: refs/heads/${name}:$remote_top/${name}"
+               done >>"$GIT_DIR/remotes/$origin" &&
+               case "$use_separate_remote" in
+               t)
+                       rm -f "refs/remotes/$origin/HEAD"
+                       git-symbolic-ref "refs/remotes/$origin/HEAD" \
+                               "refs/remotes/$origin/$head_points_at"
+               esac
        esac
 
        case "$no_checkout" in
        '')
-               git checkout
+               git-read-tree -m -u -v HEAD HEAD
        esac
 fi
+rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 
-trap - exit
+trap - 0