blobs/xx20/download_parse_me.sh: cleanup and don't continue if hash is good

Signed-off-by: Thierry Laurion <insurgo@riseup.net>

Author: tlaurion

blobs/xx20/download_parse_me.sh

@@ -6,10 +6,20 @@ FINAL_ME_BIN_SHA256SUM="1eef6716aa61dd844d58eca15a85faa1bf5f82715defd30bd3373e79
 ME_EXE_SHA256SUM="48f18d49f3c7c79fa549a980f14688bc27c18645f64d9b6827a15ef5c547d210  83rf46ww.exe"
 ME7_5M_UPD_PRODUCTION_SHA256SUM="760b0776b99ba94f56121d67c1f1226c77f48bd3b0799e1357a51842c79d3d36  app/ME7_5M_UPD_Production.bin"
 
+if [ -e "$BLOBDIR/me.bin" ]; then
+  echo "$BLOBDIR/me.bin found..."
+  if ! echo "$FINAL_ME_BIN_SHA256SUM" | sha256sum --check; then
+    echo "$BLOBDIR/me.bin doesn't pass integrity validation. Continuing..."
+    rm -f "$BLOBDIR/me.bin"
+  else
+    echo "$BLOBDIR/me.bin already extracted and neutered outside of BUP"
+    exit 0
+  fi
+fi
 
 echo "### Creating temp dir"
 extractdir=$(mktemp -d)
-cd "$extractdir"
+cd "$extractdir" || exit 1
 
 echo "### Downloading https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/83rf46ww.exe..."
 wget  https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/83rf46ww.exe || { echo "ERROR: wget not found" && exit 1; }
@@ -23,13 +33,13 @@ echo "### Verifying expected hash of app/ME7_5M_UPD_Production.bin"
 echo "$ME7_5M_UPD_PRODUCTION_SHA256SUM" | sha256sum --check || { echo "Failed sha256sum verification on extracted binary..." && exit 1; }
 
 
-echo "###Generating neuter+deactivate+maximize reduction of ME on $bioscopy, outputting minimized ME under $BLOBDIR/me.bin... "
-python3 "$BLOBDIR/me7_update_parser.py" -O "$BLOBDIR/me.bin" app/ME7_5M_UPD_Production.bin || { echo "Failed to generate ME binary..." && exit 1; }
+echo "###Generating neuter+deactivate+maximize reduction of ME on app/ME7_5M_UPD_Production.bin, outputting minimized ME under $BLOBDIR/me.bin... "
+( python3 "$BLOBDIR/me7_update_parser.py" -O "$BLOBDIR/me.bin" app/ME7_5M_UPD_Production.bin ) || { echo "Failed to generate ME binary..." && exit 1; }
 
 echo "### Verifying expected hash of me.bin"
 echo "$FINAL_ME_BIN_SHA256SUM" | sha256sum --check || { echo "Failed sha256sum verification on final binary..." && exit 1; }
 
 
 echo "###Cleaning up..."
-cd -
+cd - || exit 1
 rm -r "$extractdir"