X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=topgit.git;a=blobdiff_plain;f=tg-update.sh;h=f36624fe71b73263471e5df8fbb0014d47ca2ee0;hp=563a62d8fbb293b4140fdd17067caf552d215e9c;hb=d5cc14199b3186453a1819a3ac3a31725cda66f9;hpb=5b78a37b9c29a106980ffe2f24e0dd6b2b60387c

diff --git a/tg-update.sh b/tg-update.sh
index 563a62d..f36624f 100644
--- a/tg-update.sh
+++ b/tg-update.sh
@@ -9,7 +9,7 @@ name=
 ## Parse options
 
 if [ -n "$1" ]; then
-	echo "Usage: tg update" >&2
+	echo "Usage: tg [...] update" >&2
 	exit 1
 fi
 
@@ -21,7 +21,7 @@ base_rev="$(git rev-parse --short --verify "refs/top-bases/$name" 2>/dev/null)"
 
 ## First, take care of our base
 
-depcheck="$(mktemp)"
+depcheck="$(mktemp -t tg-depcheck.XXXXXX)"
 missing_deps=
 needs_update "$name" >"$depcheck" || :
 [ -z "$missing_deps" ] || die "some dependencies are missing: $missing_deps"
@@ -39,13 +39,14 @@ if [ -s "$depcheck" ]; then
 		sed 's/^\([^+]\)/-\1/' | # now each line is +branch or -branch (+ == recurse)
 		uniq -s 1 | # fold branch lines; + always comes before - and thus wins within uniq
 		while read depline; do
-			action="${depline:0:1}"
-			dep="${depline:1}"
+			action="$(echo "$depline" | cut -c 1)"
+			dep="$(echo "$depline" | cut -c 2-)"
 
 			# We do not distinguish between dependencies out-of-date
-			# and base out-of-date cases for $dep here, but thanks
-			# to needs_update returning : for the latter, we do
-			# correctly recurse here in both cases.
+			# and base/remote out-of-date cases for $dep here,
+			# but thanks to needs_update returning : or %
+			# for the latter, we do correctly recurse here
+			# in both cases.
 
 			if [ x"$action" = x+ ]; then
 				info "Recursing to $dep..."
@@ -53,7 +54,7 @@ if [ -s "$depcheck" ]; then
 				(
 				export TG_RECURSIVE="[$dep] $TG_RECURSIVE"
 				export PS1="[$dep] $PS1"
-				while ! tg update; do
+				while ! $tg update; do
 					# The merge got stuck! Let the user fix it up.
 					info "You are in a subshell. If you abort the merge,"
 					info "use \`exit 1\` to abort the recursive update altogether."
@@ -67,10 +68,14 @@ if [ -s "$depcheck" ]; then
 				switch_to_base "$name"
 			fi
 
+			# This will be either a proper topic branch
+			# or a remote base.  (branch_needs_update() is called
+			# only on the _dependencies_, not our branch itself!)
+
 			info "Updating base with $dep changes..."
 			if ! git merge "$dep"; then
 				if [ -z "$TG_RECURSIVE" ]; then
-					resume='`tg update` again'
+					resume="\`$tg update\` again"
 				else # subshell
 					resume='exit'
 				fi
@@ -90,19 +95,45 @@ else
 fi
 rm "$depcheck"
 
+merge_with="refs/top-bases/$name"
+
+
+## Second, update our head with the remote branch
+
+if has_remote "$name"; then
+	rname="refs/remotes/$base_remote/$name"
+	if branch_contains "$name" "$rname"; then
+		info "The $name head is up-to-date wrt. its remote branch."
+	else
+		info "Reconciling remote branch updates with $name base..."
+		# *DETACH* our HEAD now!
+		git checkout -q "refs/top-bases/$name"
+		if ! git merge "$rname"; then
+			info "Oops, you will need to help me out here a bit."
+			info "Please commit merge resolution and call:"
+			info "git checkout $name && git merge <commitid>"
+			info "It is also safe to abort this operation using: git reset --hard $name"
+			exit 3
+		fi
+		# Go back but remember we want to merge with this, not base
+		merge_with="$(git rev-parse HEAD)"
+		git checkout -q "$name"
+	fi
+fi
+
 
-## Second, update our head with the base
+## Third, update our head with the base
 
-if branch_contains "$name" "refs/top-bases/$name"; then
+if branch_contains "$name" "$merge_with"; then
 	info "The $name head is up-to-date wrt. the base."
 	exit 0
 fi
 info "Updating $name against new base..."
-if ! git merge "refs/top-bases/$name"; then
+if ! git merge "$merge_with"; then
 	if [ -z "$TG_RECURSIVE" ]; then
 		info "Please commit merge resolution. No need to do anything else"
 		info "You can abort this operation using \`git reset --hard\` now"
-		info "and retry this merge later using \`tg update\`."
+		info "and retry this merge later using \`$tg update\`."
 	else # subshell
 		info "Please commit merge resolution and call exit."
 		info "You can abort this operation using \`git reset --hard\`."