feat: Show download progress (#398)

src/install.sh

@@ -34,14 +34,19 @@ BASE=$(echo "$BASE" | sed -e 's/[^A-Za-z0-9._-]/_/g')
 TMP="$STORAGE/${BASE%.*}.tmp"
 rm -f "$TMP"
 
-MSG="Downloading $BASE as boot image..."
+MSG="Downloading $BASE ..."
 info "$MSG" && html "$MSG"
 
+/run/progress.sh "$TMP" "Downloading $BASE ([P])..." &
 { wget "$BOOT" -O "$TMP" -q --no-check-certificate --show-progress "$PROGRESS"; rc=$?; } || :
 
+fKill "progress.sh"
+
 (( rc != 0 )) && error "Failed to download $BOOT , reason: $rc" && exit 60
 [ ! -f "$TMP" ] && error "Failed to download $BOOT" && exit 61
 
+html "Download finished successfully..."
+
 SIZE=$(stat -c%s "$TMP")
 
 if ((SIZE<100000)); then
@@ -50,5 +55,4 @@ fi
 
 mv -f "$TMP" "$STORAGE/$BASE"
 
-html "Download finished successfully..."
 return 0

src/progress.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+escape () {
+    local s
+    s=${1//&/\&}
+    s=${s//</\&lt;}
+    s=${s//>/\&gt;}
+    s=${s//'"'/\&quot;}
+    printf -- %s "$s"
+    return 0
+}
+
+file="$1"
+body=$(escape "$2")
+info="/run/shm/msg.html"
+
+if [[ "$body" == *"..." ]]; then
+  body="<p class=\"loading\">${body/.../}</p>"
+fi
+
+while true
+do
+  if [ -f "$file" ]; then
+    size=$(stat -c '%s' "$file" | numfmt --to=si --suffix=B)
+    echo "${body//(\[P\])/($size)}"> "$info"
+  fi
+  sleep 1
+done