Rewrite fromhost/BUILD on each compile.sh run

Otherwise it keeps appending libarchive library targets to the existing BUILD
file.

--
MOS_MIGRATED_REVID=87942865

1 files changed, 57 insertions, 50 deletions

diff --git a/compile.sh b/compile.sh
index 2fcb525dd9..c7e87227b4 100755
--- a/compile.sh
+++ b/compile.sh
@@ -64,29 +64,11 @@ function log() {
   fi
 }
 
-# Create symlinks so we can use tools from the base_workspace.
-rm -f base_workspace/tools && ln -s $(pwd)/tools base_workspace/tools
-rm -f base_workspace/third_party && ln -s $(pwd)/third_party base_workspace/third_party
-
-mkdir -p fromhost
-# Do not overwrite fromhost/BUILD with a dummy if it already exists.
-if [ ! -f fromhost/BUILD ]; then
-  cat << EOF > fromhost/BUILD
+function write_fromhost_build() {
+  case "${PLATFORM}" in
+    linux)
+      cat << EOF > fromhost/BUILD
 package(default_visibility = ["//visibility:public"])
-EOF
-fi
-
-case "${PLATFORM}" in
-linux)
-  # Sorry, no static linking on linux for now.
-  LDFLAGS="$(pkg-config libarchive --libs) -lrt $LDFLAGS"
-  JNILIB="libunix.so"
-  MD5SUM="md5sum"
-  # JAVA_HOME must point to a Java 8 installation.
-  JAVA_HOME=${JAVA_HOME:-$(readlink -f $(which javac) | sed "s_/bin/javac__")}
-  PROTOC=${PROTOC:-third_party/protobuf/protoc.amd64}
-
-cat << EOF >> fromhost/BUILD
 cc_library(
   name = "libarchive",
   srcs = [],
@@ -94,19 +76,20 @@ cc_library(
 )
 EOF
 
-  ;;
-darwin)
-  homebrew_header=$(ls -1 $(brew --prefix 2>/dev/null)/Cellar/libarchive/*/include/archive.h 2>/dev/null | head -n1)
-  if [[ -e $homebrew_header ]]; then
-    rm -f fromhost/*.[ah]
-    touch fromhost/empty.c
-    # For use with Homebrew.
-    archive_dir=$(dirname $(dirname $homebrew_header))
-    ARCHIVE_CFLAGS="-I${archive_dir}/include"
-    LDFLAGS="-L${archive_dir}/lib -larchive $LDFLAGS"
-
-    cp ${archive_dir}/lib/*.a ${archive_dir}/include/*.h fromhost/
-    cat << EOF >> fromhost/BUILD
+      ;;
+    darwin)
+      homebrew_header=$(ls -1 $(brew --prefix 2>/dev/null)/Cellar/libarchive/*/include/archive.h 2>/dev/null | head -n1)
+      if [[ -e $homebrew_header ]]; then
+        rm -f fromhost/*.[ah]
+        touch fromhost/empty.c
+        # For use with Homebrew.
+        archive_dir=$(dirname $(dirname $homebrew_header))
+        ARCHIVE_CFLAGS="-I${archive_dir}/include"
+        LDFLAGS="-L${archive_dir}/lib -larchive $LDFLAGS"
+
+        cp ${archive_dir}/lib/*.a ${archive_dir}/include/*.h fromhost/
+        cat << EOF > fromhost/BUILD
+package(default_visibility = ["//visibility:public"])
 cc_library(
   name = "libarchive",
   srcs = glob(["*.a"]) + ["empty.c"],
@@ -116,22 +99,23 @@ cc_library(
 )
 EOF
 
-  elif [[ -e /opt/local/include/archive.h ]]; then
-    # For use with Macports.
-    rm -f fromhost/*.[ah]
-    touch fromhost/empty.c
-    cp /opt/local/include/archive.h  /opt/local/include/archive_entry.h fromhost/
-    cp /opt/local/lib/{libarchive,liblzo2,liblzma,libcharset,libbz2,libxml2,libz,libiconv}.a \
-      fromhost/
-
-    ARCHIVE_CFLAGS="-Ifromhost"
-    # Link libarchive statically
-    LDFLAGS="fromhost/libarchive.a fromhost/liblzo2.a \
+      elif [[ -e /opt/local/include/archive.h ]]; then
+        # For use with Macports.
+        rm -f fromhost/*.[ah]
+        touch fromhost/empty.c
+        cp /opt/local/include/archive.h  /opt/local/include/archive_entry.h fromhost/
+        cp /opt/local/lib/{libarchive,liblzo2,liblzma,libcharset,libbz2,libxml2,libz,libiconv}.a \
+          fromhost/
+
+        ARCHIVE_CFLAGS="-Ifromhost"
+        # Link libarchive statically
+        LDFLAGS="fromhost/libarchive.a fromhost/liblzo2.a \
              fromhost/liblzma.a fromhost/libcharset.a \
              fromhost/libbz2.a fromhost/libxml2.a \
              fromhost/libz.a fromhost/libiconv.a \
              $LDFLAGS"
-    cat << EOF >> fromhost/BUILD
+        cat << EOF > fromhost/BUILD
+package(default_visibility = ["//visibility:public"])
 cc_library(
   name = "libarchive",
   srcs = glob(["*.a"]) + ["empty.c"],
@@ -139,10 +123,33 @@ cc_library(
   includes  = ["."],
 )
 EOF
-  else
-    log "WARNING: Could not find libarchive installation, proceeding bravely."
-  fi
+      else
+        log "WARNING: Could not find libarchive installation, proceeding bravely."
+      fi
+  esac
+}
+
+# Create symlinks so we can use tools from the base_workspace.
+rm -f base_workspace/tools && ln -s $(pwd)/tools base_workspace/tools
+rm -f base_workspace/third_party && ln -s $(pwd)/third_party base_workspace/third_party
+
+mkdir -p fromhost
+if [ ! -f fromhost/BUILD ]; then
+  write_fromhost_build
+fi
+
+case "${PLATFORM}" in
+linux)
+  # Sorry, no static linking on linux for now.
+  LDFLAGS="$(pkg-config libarchive --libs) -lrt $LDFLAGS"
+  JNILIB="libunix.so"
+  MD5SUM="md5sum"
+  # JAVA_HOME must point to a Java 8 installation.
+  JAVA_HOME=${JAVA_HOME:-$(readlink -f $(which javac) | sed "s_/bin/javac__")}
+  PROTOC=${PROTOC:-third_party/protobuf/protoc.amd64}
+  ;;
 
+darwin)
   JNILIB="libunix.dylib"
   MD5SUM="md5"
   if [[ -z "$JAVA_HOME" ]]; then