Merge branch 'fixes'

Documentation/git-symbolic-ref.txt

@@ -0,0 +1,52 @@
+git-symbolic-ref(1)
+===================
+
+NAME
+----
+git-symbolic-ref - read and modify symbolic refs
+
+SYNOPSIS
+--------
+'git-symbolic-ref' <name> [<ref>]
+
+DESCRIPTION
+-----------
+Given one argument, reads which branch head the given symbolic
+ref refers to and outputs its path, relative to the `.git/`
+directory.  Typically you would give `HEAD` as the <name>
+argument to see on which branch your working tree is on.
+
+Give two arguments, create or update a symbolic ref <name> to
+point at the given branch <ref>.
+
+Traditionally, `.git/HEAD` is a symlink pointing at
+`refs/heads/master`.  When we want to switch to another branch,
+we did `ln -sf refs/heads/newbranch .git/HEAD`, and when we want
+to find out which branch we are on, we did `readlink .git/HEAD`.
+This was fine, and internally that is what still happens by
+default, but on platforms that does not have working symlinks,
+or that does not have the `readlink(1)` command, this was a bit
+cumbersome.  On some platforms, `ln -sf` does not even work as
+advertised (horrors).
+
+A symbolic ref can be a regular file that stores a string that
+begins with `ref: refs/`.  For example, your `.git/HEAD` *can*
+be a regular file whose contents is `ref: refs/heads/master`.
+This can be used on a filesystem that does not support symbolic
+links.  Instead of doing `readlink .git/HEAD`, `git-symbolic-ref
+HEAD` can be used to find out which branch we are on.  To point
+the HEAD to `newbranch`, instead of `ln -sf refs/heads/newbranch
+.git/HEAD`, `git-symbolic-ref HEAD refs/heads/newbranch` can be
+used.
+
+Currently, .git/HEAD uses a regular file symbolic ref on Cygwin,
+and everywhere else it is implemented as a symlink.  This can be
+changed at compilation time.
+
+Author
+------
+Written by Junio C Hamano <junkio@cox.net>
+
+GIT
+---
+Part of the gitlink:git[7] suite

Documentation/git-update-ref.txt

@@ -0,0 +1,58 @@
+git-update-ref(1)
+=================
+
+NAME
+----
+git-update-ref - update the object name stored in a ref safely
+
+SYNOPSIS
+--------
+`git-update-ref` <ref> <newvalue> [<oldvalue>]
+
+DESCRIPTION
+-----------
+Given two arguments, stores the <newvalue> in the <ref>, possibly
+dereferencing the symbolic refs.  E.g. `git-update-ref HEAD
+<newvalue>` updates the current branch head to the new object.
+
+Given three arguments, stores the <newvalue> in the <ref>,
+possibly dereferencing the symbolic refs, after verifying that
+the current value of the <ref> matches <oldvalue>.
+E.g. `git-update-ref refs/heads/master <newvalue> <oldvalue>`
+updates the master branch head to <newvalue> only if its current
+value is <oldvalue>.
+
+It also allows a "ref" file to be a symbolic pointer to another
+ref file by starting with the four-byte header sequence of
+"ref:".
+
+More importantly, it allows the update of a ref file to follow
+these symbolic pointers, whether they are symlinks or these
+"regular file symbolic refs".  It follows *real* symlinks only
+if they start with "refs/": otherwise it will just try to read
+them and update them as a regular file (i.e. it will allow the
+filesystem to follow them, but will overwrite such a symlink to
+somewhere else with a regular filename).
+
+In general, using
+
+	git-update-ref HEAD "$head"
+
+should be a _lot_ safer than doing
+
+	echo "$head" > "$GIT_DIR/HEAD"
+
+both from a symlink following standpoint *and* an error checking
+standpoint.  The "refs/" rule for symlinks means that symlinks
+that point to "outside" the tree are safe: they'll be followed
+for reading but not for writing (so we'll never write through a
+ref symlink to some other tree, if you have copied a whole
+archive by creating a symlink tree).
+
+Author
+------
+Written by Linus Torvalds <torvalds@osdl.org>.
+
+GIT
+---
+Part of the gitlink:git[7] suite

git-commit.sh

@@ -133,10 +133,13 @@ fi | git-stripspace >.editmsg
 
 case "$signoff" in
 t)
-	git-var GIT_COMMITTER_IDENT | sed -e '
-		s/>.*/>/
-		s/^/Signed-off-by: /
-	' >>.editmsg
+	{
+		echo
+		git-var GIT_COMMITTER_IDENT | sed -e '
+			s/>.*/>/
+			s/^/Signed-off-by: /
+		'
+	} >>.editmsg
 	;;
 esac
 

git-external-diff-script

@@ -1,67 +0,0 @@
-#!/bin/sh
-# Copyright (C) 2005 Junio C Hamano
-#
-# This script is designed to emulate what the built-in diff driver
-# does when set as GIT_EXTERNAL_SCRIPT.
-
-case "$#" in
-1)
-    echo "* Unmerged path $1"
-    exit 0 ;;
-*)
-    name1="$1" tmp1="$2" hex1="$3" mode1="$4" tmp2="$5" hex2="$6" mode2="$7"
-    case "$#" in
-    7)
-	name2="$name1" ;;
-    9)
-	name2="$8" xfrm_msg="$9" ;;
-    esac ;;	
-esac
-
-show_create () {
-    name_="$1" tmp_="$2" hex_="$3" mode_="$4"
-    echo "diff --git a/$name_ b/$name_"
-    echo "new file mode $mode_"
-    diff ${GIT_DIFF_OPTS-'-pu'} -L /dev/null -L "b/$name_" /dev/null "$tmp_"
-}
-
-show_delete () {
-    name_="$1" tmp_="$2" hex_="$3" mode_="$4"
-    echo "diff --git a/$name_ b/$name_"
-    echo "deleted file mode $mode_"
-    diff ${GIT_DIFF_OPTS-'-pu'} -L "a/$name_" -L /dev/null "$tmp_" /dev/null
-}
-
-case "$mode1" in
-120*) type1=l ;;
-100*) type1=f ;;
-.)    show_create "$name2" "$tmp2" "$hex2" "$mode2"
-      exit 0 ;;
-esac
-case "$mode2" in
-120*) type2=l ;;
-100*) type2=f ;;
-.)    show_delete "$name1" "$tmp1" "$hex1" "$mode1"
-      exit 0 ;;
-esac
-
-if test "$type1" != "$type2"
-then
-	show_delete "$name1" "$tmp1" "$hex1" "$mode1"
-	show_create "$name2" "$tmp2" "$hex2" "$mode2"
-	exit 0
-fi
-
-echo diff --git "a/$name1" "b/$name2"
-if test "$mode1" != "$mode2"
-then
-    echo "old mode $mode1"
-    echo "new mode $mode2"
-    if test "$xfrm_msg" != ""
-    then
-	echo "$xfrm_msg"
-    fi
-fi
-diff ${GIT_DIFF_OPTS-'-pu'} -L "a/$name1" -L "b/$name2" "$tmp1" "$tmp2"
-exit 0
-

git-format-patch.sh

@@ -128,10 +128,6 @@ whosepatchScript='
 	q
 }'
 
-_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"
-stripCommitHead='/^'"$_x40"' (from '"$_x40"')$/d'
-
 git-cherry -v "$rev1" "$rev2" |
 while read sign rev comment
 do
@@ -216,7 +212,7 @@ Date: '"$ad"
 	echo
 	git-diff-tree -p $diff_opts "$commit" | git-apply --stat --summary
 	echo
-	git-diff-tree -p $diff_opts "$commit" | sed -e "$stripCommitHead"
+	git-diff-tree -p $diff_opts "$commit"
 
 	case "$mbox" in
 	t)

ssh-fetch.c

@@ -36,12 +36,26 @@ static ssize_t force_write(int fd, void *buffer, size_t length)
 	return ret;
 }
 
+static int prefetches = 0;
+
+static struct object_list *in_transit = NULL;
+static struct object_list **end_of_transit = &in_transit;
+
 void prefetch(unsigned char *sha1)
 {
 	char type = 'o';
+	struct object_list *node;
+	if (prefetches > 100) {
+		fetch(in_transit->item->sha1);
+	}
+	node = xmalloc(sizeof(struct object_list));
+	node->next = NULL;
+	node->item = lookup_unknown_object(sha1);
+	*end_of_transit = node;
+	end_of_transit = &node->next;
 	force_write(fd_out, &type, 1);
 	force_write(fd_out, sha1, 20);
-	//memcpy(requested + 20 * prefetches++, sha1, 20);
+	prefetches++;
 }
 
 static char conn_buf[4096];
@@ -51,6 +65,18 @@ int fetch(unsigned char *sha1)
 {
 	int ret;
 	signed char remote;
+	struct object_list *temp;
+
+	if (memcmp(sha1, in_transit->item->sha1, 20)) {
+		// we must have already fetched it to clean the queue
+		return has_sha1_file(sha1) ? 0 : -1;
+	}
+	prefetches--;
+	temp = in_transit;
+	in_transit = in_transit->next;
+	if (!in_transit)
+		end_of_transit = &in_transit;
+	free(temp);
 
 	if (conn_buf_posn) {
 		remote = conn_buf[0];