1 files changed, 49 insertions, 0 deletions
diff --git a/src/pkg/deps.bash b/src/pkg/deps.bash
new file mode 100755
index 000000000..2095ec1d8
--- /dev/null
+++ b/src/pkg/deps.bash
@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+# Copyright 2009 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+eval $(gomake --no-print-directory -f ../Make.inc go-env)
+
+OUT="Make.deps"
+TMP="Make.deps.tmp"
+
+if [ -f $OUT ] && ! [ -w $OUT ]; then
+	echo "$0: $OUT is read-only; aborting." 1>&2
+	exit 1
+fi
+
+# Get list of directories from Makefile
+dirs=$(gomake --no-print-directory echo-dirs)
+dirpat=$(echo $dirs C | awk '{
+	for(i=1;i<=NF;i++){ 
+		x=$i
+		gsub("/", "\\/", x)
+		printf("/^(%s)$/\n", x)
+	}
+}')
+
+for dir in $dirs; do (
+	cd $dir || exit 1
+
+	sources=$(sed -n 's/^[ 	]*\([^ 	]*\.go\)[ 	]*\\*[ 	]*$/\1/p' Makefile)
+	sources=$(echo $sources | sed 's/\$(GOOS)/'$GOOS'/g')
+	sources=$(echo $sources | sed 's/\$(GOARCH)/'$GOARCH'/g')
+	# /dev/null here means we get an empty dependency list if $sources is empty
+	# instead of listing every file in the directory.
+	sources=$(ls $sources /dev/null 2> /dev/null)  # remove .s, .c, etc.
+
+	deps=$(
+		sed -n '/^import.*"/p; /^import[ \t]*(/,/^)/p' $sources /dev/null |
+		cut -d '"' -f2 |
+		awk "$dirpat" |
+		grep -v "^$dir\$" |
+		sed 's/$/.install/' |
+		sed 's;^C\.install;runtime/cgo.install;' |
+		sort -u
+	)
+
+	echo $dir.install: $deps
+) done > $TMP
+
+mv $TMP $OUT