[PATCH] isar-installer: show progress bar during bmaptool copy process

["'Kasturi Shekar' via isar-users" <isar-users@googlegroups.com>]

- Added support for a progress gauge using a named pipe to capture and display
 percentage progress when using `bmaptool`.
- The progress bar is displayed only when the `bmaptool` version is 3.8 or above,
 as versions prior to 3.8 has some issues with `--psplash-pipe` flag.
- For `bmaptool` versions below 3.8, the image copy process continues without a
 progress bar to maintain compatibility.
- The gauge uses `dialog --gauge` to dynamically update the progress based on
 output from the `bmaptool` process.

Signed-off-by: Kasturi Shekar <kasturi.shekar@siemens.com>
---
 .../files/usr/bin/deploy-image-wic.sh         | 38 ++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

diff --git a/meta-isar/recipes-installer/deploy-image/files/usr/bin/deploy-image-wic.sh b/meta-isar/recipes-installer/deploy-image/files/usr/bin/deploy-image-wic.sh
index 7f552eee..66c35506 100755
--- a/meta-isar/recipes-installer/deploy-image/files/usr/bin/deploy-image-wic.sh
+++ b/meta-isar/recipes-installer/deploy-image/files/usr/bin/deploy-image-wic.sh
@@ -149,7 +149,43 @@ if ! $installer_unattended; then
     clear
 fi
 
-if ! bmaptool copy ${bmap_options} "$installer_image_uri" "${installer_target_dev}"; then
+# Function to compare version numbers
+version_ge() {
+    if [ "$(printf '%s\n' "$1"X "$2" | sort -V | head -n 1)" != "$1"X ]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+# Get bmap-tools version
+bmap_version=$(bmaptool --version | awk '{ print $NF }')
+
+if version_ge "$bmap_version" "3.8"; then
+    # Create a named pipe for progress communication
+    progress_pipe="/tmp/progress"
+    if ! mkfifo "$progress_pipe"; then
+        echo "Error: Failed to create named pipe $progress_pipe"
+        exit 1
+    fi
+
+    # Add psplash pipe to bmap_options
+    bmap_options="$bmap_options --psplash-pipe=$progress_pipe"
+    quiet_flag="-q"
+
+    # Initialize the dialog gauge and update it dynamically
+    (
+        while true; do
+            if read -r line < "$progress_pipe"; then
+                percentage=$(echo "$line" | awk '{ print $2 }')
+                echo "$percentage"
+            fi
+        done
+    ) | dialog --gauge "Flashing image, please wait..." 10 70 0 &
+
+fi
+
+if ! bmaptool ${quiet_flag} copy ${bmap_options} "$installer_image_uri" "${installer_target_dev}"; then
     exit 1
 fi
 
-- 
2.39.5

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