opengl: Rename of hook to more accurate insert-virtualgl

pkgs/opengl/insert-virtualgl.sh

@@ -0,0 +1,158 @@
+# Stream producers
+#
+# These produce a stream of escaped new-line separated items
+#
+
+# Stream the given arguments
+#
+VGL_sourceS() {
+  printf '%q\n' "$@"
+}
+
+# Stream the results of find (correctly escapes all filenames)
+#
+VGL_findS() {
+  declare -a options=("$@") file
+  find "${options[@]}" -print0 |
+    while read -d '' -r file; do
+      VGL_sourceS "$file"
+    done
+}
+
+# Stream the closure of the list libraries from an elf file
+#
+VGL_elfLibsS() {
+  declare file=$1 line
+  ldd "$file" |
+    while read line; do
+      line=${line#$'\t'}
+      case "$line" in
+        *' => not found')
+          line=${line% => not found}
+          ;;
+        *' => '*' ('*')')
+          line=${line#* => }
+          line=${line% (*)}
+          ;;
+        *' ('*')')
+          line=${line% (*)}
+          ;;
+      esac
+      VGL_sourceS "$line"
+    done
+}
+
+
+
+# Stream transformers
+#
+# Take in a set of options and transform a stream of new-line separated items
+#
+
+# Group all items onto a single line separated by given deliminator (or space)
+#
+VGL_joinS() {
+  declare deliminator=${1- } next
+  if read next; then
+    printf '%q' "$next"
+    while read next; do
+      printf '%s%q' "$deliminator" "$next"
+    done
+    printf '\n'
+  fi
+}
+
+# Remove all items for which the given command returns false
+#
+VGL_filterS() {
+  declare command=("$@")
+  while read next; do
+    if eval $(printf '%q ' "${command[@]}" "$next"); then
+      VGL_sourceS "$next"
+    fi
+  done
+}
+
+
+
+# Stream consumers
+#
+# These consume a stream of escaped new-line separated items
+#
+
+# Return true iff given command returns true for some item
+#
+VGL_anyS() {
+  declare command=("$@")
+  while read next; do
+    if eval $(printf '%q ' "${command[@]}" "$next"); then
+      return 0
+    fi
+  done
+  return 1
+}
+
+
+
+# Tests for the filter transformer
+#
+
+# Check for an elf file (binary or library)
+#
+VGL_isElfBin() {
+  declare file=$1
+  case "$(file -b -N --mime-type "$file")" in
+    application/x-executable | application/x-pie-executable)
+      return 0 ;;
+    *)
+      return 1 ;;
+  esac
+}
+
+# Check for libGL
+#
+VGL_isLibGL() {
+  declare file=$1
+  case "$file" in
+    libGL.so* | */libGL.so*)
+      return 0 ;;
+    *)
+      return 1 ;;
+  esac
+}
+
+
+
+# Setup hook
+#
+
+# Find all executables that depend on libGL and add a libvglfaker.so dependency
+#
+VGL_autoAddVGL() {
+  declare opts=$(shopt -p) output
+  set +o pipefail
+
+  echo "Inserting VirtualGL into OpenGL executables in $prefix..." >&2
+
+  for output in $outputs; do
+    VGL_findS "${!output}" -type f | VGL_filterS VGL_isElfBin | {
+      declare file
+      while read file; do
+        VGL_elfLibsS "$file" |
+          if VGL_anyS VGL_isLibGL; then
+            VGL_sourceS "$file"
+          fi
+      done
+    } | {
+      declare file
+      while read file; do
+        printf 'patchelf --add-needed @virtualglLib@/lib/libvglfaker.so %q\n' "$file" >&2
+        patchelf --add-needed @virtualglLib@/lib/libvglfaker.so "$file"
+      done
+    }
+  done
+
+  eval "$opts"
+}
+
+postFixupHooks+=(VGL_autoAddVGL)