--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/emsdk/emsdk_env.sh	Thu Jan 22 21:23:17 2026 -0800
@@ -0,0 +1,73 @@
+# This script is sourced by the user and uses
+# their shell.
+#
+# This script tries to find its location but
+# this does not work in every shell.
+#
+# It is known to work in bash, zsh and ksh
+#
+# Do not execute this script without sourcing,
+# because it won't have any effect then.
+# That is, always run this script with
+#
+#     . /path/to/emsdk_env.sh
+#
+# or
+#
+#     source /path/to/emsdk_env.sh
+#
+# instead of just plainly running with
+#
+#     ./emsdk_env.sh
+#
+# which won't have any effect.
+
+CURRENT_SCRIPT=
+DIR="."
+
+# use shell specific method to get the path
+# to the current file being source'd.
+#
+# To add a shell, add another conditional below,
+# then add tests to scripts/test_source_env.sh
+
+if [ -n "${BASH_SOURCE-}" ]; then
+  CURRENT_SCRIPT="$BASH_SOURCE"
+elif [ -n "${ZSH_VERSION-}" ]; then
+  CURRENT_SCRIPT="${(%):-%x}"
+elif [ -n "${KSH_VERSION-}" ]; then
+  CURRENT_SCRIPT=${.sh.file}
+fi
+
+if [ -n "${CURRENT_SCRIPT-}" ]; then
+  DIR=$(dirname "$CURRENT_SCRIPT")
+  if [ -h "$CURRENT_SCRIPT" ]; then
+    # Now work out actual DIR since this is part of a symlink.
+    # Since we can't be sure that readlink or realpath
+    # are available, use tools more likely to be installed.
+    # (This will still fail if sed is not available.)
+    SYMDIR=$(dirname "$(ls -l "$CURRENT_SCRIPT" | sed -n "s/.*-> //p")")
+    if [ -z "$SYMDIR" ]; then
+      SYMDIR="."
+    fi
+    FULLDIR="$DIR/$SYMDIR"
+    DIR=$(cd "$FULLDIR" > /dev/null 2>&1; /bin/pwd)
+    unset SYMDIR
+    unset FULLDIR
+  fi
+fi
+unset CURRENT_SCRIPT
+
+if [ ! -f "$DIR/emsdk.py" ]; then
+  echo "Error: unable to determine 'emsdk' directory. Perhaps you are using a shell or" 1>&2
+  echo "       environment that this script does not support." 1>&2
+  echo 1>&2
+  echo "A possible solution is to source this script while in the 'emsdk' directory." 1>&2
+  echo 1>&2
+  unset DIR
+  return
+fi
+
+# Force emsdk to use bash syntax so that this works in windows + bash too
+eval `EMSDK_BASH=1 "$DIR/emsdk" construct_env`
+unset DIR