Auto-build vendor directory if it doesn't exist.

docs/dev/recipe-client-addon/workflow.rst

@@ -71,8 +71,9 @@ files:
    cd recipe-client-addon
    ./bin/make-xpi.sh # Creates /recipe-client-addon/shield-recipe-client.xpi
 
-Pass the ``-b``/``--build-vendor`` flag to auto-build vendor dependencies before
-creating the XPI.
+If the vendor directory hasn't been built, ``make-xpi.sh`` auto-builds it. Or,
+pass the ``-b``/``--build-vendor`` flag to force-build vendor dependencies
+before creating the XPI.
 
 .. _recipe-client-sync:
 
@@ -87,8 +88,9 @@ checkout of mozilla-central. The files that are copied over are determined by
    cd recipe-client-addon
    ./bin/update-mozilla-central.sh /path/to/mozilla-central
 
-Pass the ``-b``/``--build-vendor`` flag to auto-build vendor dependencies before
-copying the files to the checkout.
+If the vendor directory hasn't been built, ``update-mozilla-central.sh``
+auto-builds it. Or, pass the ``-b``/``--build-vendor`` flag to force-build
+vendor dependencies before copying files to the checkout.
 
 .. _recipe-client-tests:
 

recipe-client-addon/bin/make-xpi.sh

@@ -5,6 +5,7 @@ set -eu
 BASE_DIR="$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")"
 TMP_DIR=$(mktemp -d)
 DEST="${TMP_DIR}/shield-recipe-client"
+VENDOR_DIR="${BASE_DIR}/vendor"
 BUILD_VENDOR=false
 
 while [[ $# -gt 0 ]]
@@ -31,7 +32,7 @@ function cleanup {
 trap cleanup EXIT
 
 # Build vendor files
-if [[ "$BUILD_VENDOR" = true ]]; then
+if [[ "$BUILD_VENDOR" = true || !(-d "$VENDOR_DIR") ]]; then
   pushd $BASE_DIR
   npm run build
   popd

recipe-client-addon/bin/update-mozilla-central.sh

@@ -4,6 +4,7 @@ set -eu
 
 baseDir="$(dirname "$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )")"
 mozCentral=""
+vendorDir="${baseDir}/vendor"
 buildVendor=false
 
 while [[ $# -gt 0 ]]
@@ -36,8 +37,8 @@ fi
 
 rm -rf "${dest}"/*
 
-# Build vendor files
-if [[ "$buildVendor" = true ]]; then
+# Build vendor files if enabled or if vendor doesn't exist yet
+if [[ "$buildVendor" = true || !(-d "$vendorDir") ]]; then
   pushd $baseDir
   npm run build
   popd