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[20.03] emacs: improve setup hook #86491

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[20.03] emacs: improve setup hook #86491

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24 changes: 8 additions & 16 deletions pkgs/build-support/emacs/setup-hook.sh
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@@ -1,23 +1,15 @@
addToEmacsLoadPath() {
local lispDir="$1"
if [[ -d $lispDir && ${EMACSLOADPATH-} != *"$lispDir":* ]] ; then
# It turns out, that the trailing : is actually required
# see https://www.gnu.org/software/emacs/manual/html_node/elisp/Library-Search.html
export EMACSLOADPATH="$lispDir:${EMACSLOADPATH-}"
fi
}

addEmacsVars () {
addToEmacsLoadPath "$1/share/emacs/site-lisp"

# Add sub paths to the Emacs load path if it is a directory
# containing .el files. This is necessary to build some packages,
# e.g., using trivialBuild.
for lispDir in \
"$1/share/emacs/site-lisp" \
"$1/share/emacs/site-lisp/"* \
"$1/share/emacs/site-lisp/elpa/"*; do
if [[ -d $lispDir && "$(echo "$lispDir"/*.el)" ]] ; then
addToEmacsLoadPath "$lispDir"
# Add the path to the Emacs load path if it is a directory
# containing .el files and it has not already been added to the
# load path.
if [[ -d $lispDir && "$(echo "$lispDir"/*.el)" && ${EMACSLOADPATH-} != *"$lispDir":* ]] ; then
# It turns out, that the trailing : is actually required
# see https://www.gnu.org/software/emacs/manual/html_node/elisp/Library-Search.html
export EMACSLOADPATH="$lispDir:${EMACSLOADPATH-}"
fi
done
}
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