1 files changed, 129 insertions, 0 deletions
diff --git a/pkgs/build-support/appimage/appimage-exec.sh b/pkgs/build-support/appimage/appimage-exec.sh
new file mode 100755
index 00000000000..fd38889b9aa
--- /dev/null
+++ b/pkgs/build-support/appimage/appimage-exec.sh
@@ -0,0 +1,129 @@
+#!@shell@
+if [ ! -z "$DEBUG" ] ; then
+  set -x
+fi
+
+export PATH=@path@
+
+# src : AppImage
+# dest : let's unpack() create the directory
+unpack() {
+  src=$1
+  out=$2
+
+  # https://github.com/AppImage/libappimage/blob/ca8d4b53bed5cbc0f3d0398e30806e0d3adeaaab/src/libappimage/utils/MagicBytesChecker.cpp#L45-L63
+  eval "$(r2 "$src" -nn -Nqc "p8j 3 @ 8" |
+    jq -r '{appimageSignature: (.[:-1]|implode), appimageType: .[-1]}|
+      @sh "appimageSignature=\(.appimageSignature) appimageType=\(.appimageType)"')"
+
+  # check AppImage signature
+  if [[ "$appimageSignature" != "AI" ]]; then
+    echo "Not an appimage."
+    exit -1
+  fi
+
+  case "$appimageType" in
+    1)  echo "Uncompress $(basename "$src") of Type: $appimageType."
+        mkdir "$out"
+        pv "$src" | bsdtar -x -C "$out" -f -
+        ;;
+
+    2)  echo "Uncompress $(basename "$src") of Type: $appimageType."
+        # This method avoid issues with non executable appimages,
+        # non-native packer, packer patching and squashfs-root destination prefix.
+
+        # multiarch offset one-liner using same method as AppImage
+        # see https://gist.github.com/probonopd/a490ba3401b5ef7b881d5e603fa20c93
+        offset=$(r2 "$src" -nn -Nqc "pfj.elf_header @ 0" |\
+          jq 'map({(.name): .value}) | add | .shoff + (.shnum * .shentsize)')
+
+        unsquashfs -q -d "$out" -o "$offset" "$src"
+        chmod go-w "$out"
+        ;;
+
+    # 3) get ready, https://github.com/TheAssassin/type3-runtime
+    *)  echo Unsupported AppImage Type: "$appimageType"
+        exit
+        ;;
+  esac
+  echo "$(basename "$src") is now installed in $out"
+}
+
+apprun() {
+
+  eval "$(rahash2 "$APPIMAGE" -j | jq -r '.[] | @sh "SHA256=\(.hash)"')"
+  echo sha256 = \"$SHA256\"\;
+  export APPDIR="${XDG_CACHE_HOME:-$HOME/.cache}/appimage-run/$SHA256"
+
+  #compatibility
+  if [ -x "$APPDIR/squashfs-root" ]; then APPDIR="$APPDIR/squashfs-root"; fi
+
+  if [ ! -x "$APPDIR" ]; then
+    mkdir -p $(dirname "$APPDIR")
+    unpack "$APPIMAGE" "$APPDIR"
+  fi
+
+  echo $(basename "$APPIMAGE") installed in "$APPDIR"
+
+  export PATH="$PATH:$PWD/usr/bin"
+  wrap
+}
+
+wrap() {
+
+  cd "$APPDIR"
+  # quite same in appimageTools
+  export APPIMAGE_SILENT_INSTALL=1
+
+  if [ -n "$APPIMAGE_DEBUG_EXEC" ]; then
+    exec "$APPIMAGE_DEBUG_EXEC"
+  fi
+
+  exec ./AppRun "$@"
+}
+
+usage() {
+  echo "Usage: appimage-run [appimage-run options] <AppImage> [AppImage options]";
+  echo
+  echo 'Options are passed on to the appimage.'
+  echo "If you want to execute a custom command in the appimage's environment, set the APPIMAGE_DEBUG_EXEC environment variable."
+  exit 1
+}
+
+while getopts ":a:d:xrw" option; do
+    case "${option}" in
+        a)  #AppImage file
+            # why realpath?
+            APPIMAGE="$(realpath "${OPTARG}")"
+            ;;
+        d)  #appimage Directory
+            export APPDIR=${OPTARG}
+            ;;
+        x)  # eXtract
+            unpack_opt=true
+            ;;
+        r)  # appimage-Run
+            apprun_opt=true
+            ;;
+        w)  # WrapAppImage
+            wrap_opt=true
+            ;;
+        *)
+            usage
+            ;;
+    esac
+done
+shift $((OPTIND-1))
+
+if [[ $unpack_opt = true ]] && [[ -f "$APPIMAGE" ]]; then
+  unpack "$APPIMAGE" "$APPDIR"
+  exit
+fi
+
+if [[ $apprun_opt = true ]] && [[ -f "$APPIMAGE" ]]; then
+  apprun
+fi
+
+if [[ $wrap_opt = true ]] && [[ -d "$APPDIR" ]]; then
+  wrap
+fi