fix(CI): Check for the binaries we want to use

Signed-off-by: Joas Schilling <coding@schilljs.com>

diff --git a/build/image-optimization.sh b/build/image-optimization.sh
index 6d494b8ddb7def71264dcc919f5935ece5bde3c9..e559d8552f61105b1cc3f066e61deb636029e607 100755 (executable)
--- a/build/image-optimization.sh
+++ b/build/image-optimization.sh
@@ -1,5 +1,25 @@
 #!/usr/bin/env bash
 
+set -e
+
+OPTIPNG=$(which optipng)
+if ! [ -x "$OPTIPNG" ]; then
+       echo "optipng executable not found, please install" >&2
+       exit 1
+fi
+JPEGOPTIM=$(which jpegoptim)
+if ! [ -x "$JPEGOPTIM" ]; then
+       echo "jpegoptim executable not found, please install" >&2
+       exit 2
+fi
+SCOUR=$(which scour)
+if ! [ -x "$SCOUR" ]; then
+       echo "scour executable not found, please install" >&2
+       exit 3
+fi
+
+set +e
+
 CHECK_DIR='../'
 if [[ -d "$1" ]]; then
        CHECK_DIR=$1
@@ -20,7 +40,7 @@ function recursive_optimize_images() {
        do
                [[ -e "$png" ]] || break
 
-               optipng -o6 -strip all "$png"
+               $OPTIPNG -o6 -strip all "$png"
        done
 
        # Optimize all JPGs
@@ -28,7 +48,7 @@ function recursive_optimize_images() {
        do
                [[ -e "$jpg" ]] || break
 
-               jpegoptim --strip-all "$jpg"
+               $JPEGOPTIM --strip-all "$jpg"
        done
 
        # Optimize all SVGs
@@ -37,7 +57,7 @@ function recursive_optimize_images() {
                [[ -e "$svg" ]] || break
 
                mv $svg $svg.opttmp
-               scour --create-groups \
+               $SCOUR --create-groups \
                        --enable-id-stripping \
                        --enable-comment-stripping \
                        --shorten-ids \