94 lines
2.8 KiB
Bash
94 lines
2.8 KiB
Bash
|
#!/usr/bin/env bash
|
||
|
|
|
||
|
|
# Example input:
|
||
|
|
# ./make_portable.sh mycoolbinary
|
||
|
|
# where mycoolbinary is a mach-o object file
|
||
|
|
# (for example an executable binary or a .dylib)
|
||
|
|
#
|
||
|
|
# this script rewrites your file's every environment-specific
|
||
|
|
# dynamic link (recursively!)
|
||
|
|
# such that they point to local .dylibs.
|
||
|
|
# these .dylibs are then copied to a folder lib, next to your binary
|
||
|
|
#
|
||
|
|
# by "environment-specific" I mean any link to a .dylib under /usr/local
|
||
|
|
|
||
|
|
set -o pipefail
|
||
|
|
|
||
|
|
error() {
|
||
|
|
local parent_lineno="$1"
|
||
|
|
local message="$2"
|
||
|
|
local code="${3:-1}"
|
||
|
|
if [[ -n "$message" ]] ; then
|
||
|
|
echo "Error on or near line ${parent_lineno}: ${message}; exiting with status ${code}"
|
||
|
|
else
|
||
|
|
echo "Error on or near line ${parent_lineno}; exiting with status ${code}"
|
||
|
|
fi
|
||
|
|
exit "${code}"
|
||
|
|
}
|
||
|
|
trap 'error ${LINENO}' ERR
|
||
|
|
|
||
|
|
BINARY="$1"
|
||
|
|
BINARYDIR=$(dirname "$BINARY")
|
||
|
|
LIBREL="lib"
|
||
|
|
LIB="$BINARYDIR/$LIBREL"
|
||
|
|
|
||
|
|
# make a lib folder
|
||
|
|
mkdir -p "$LIB"
|
||
|
|
|
||
|
|
# find every LC_LOAD_DYLIB command in the obj file
|
||
|
|
# filter to just loads under /usr/local
|
||
|
|
# print the absolute path of each such dylib
|
||
|
|
get_env_specific_direct_dependencies () {
|
||
|
|
# otool -L shows us every LC_LOAD_DYLIB plus LC_ID_DYLIB
|
||
|
|
# otool -D shows us just LC_ID_DYLIB
|
||
|
|
ALL_DYLIBS=$(otool -L "$1" | awk 'NR>1')
|
||
|
|
DYLIB_ID=$(otool -D "$1" | awk 'NR>1')
|
||
|
|
if [ -z "$DYLIB_ID" ]; then
|
||
|
|
DIRECT_DEPS="$ALL_DYLIBS"
|
||
|
|
else
|
||
|
|
DIRECT_DEPS=$(echo "$ALL_DYLIBS" | grep -v "$DYLIB_ID")
|
||
|
|
fi
|
||
|
|
echo "$DIRECT_DEPS" \
|
||
|
|
| awk '/\/usr\/local\//,/.dylib/ {print $1}'
|
||
|
|
}
|
||
|
|
|
||
|
|
# lookup LC_LOAD_DYLIB commands in an obj file,
|
||
|
|
# then follow those loads and ask the same of each
|
||
|
|
# of its dylibs, recursively
|
||
|
|
get_env_specific_dependencies_recursive () {
|
||
|
|
while read -r obj; do
|
||
|
|
[ -z "$obj" ] && continue
|
||
|
|
echo "$obj"
|
||
|
|
get_env_specific_dependencies_recursive "$obj"
|
||
|
|
done < <(get_env_specific_direct_dependencies "$1")
|
||
|
|
}
|
||
|
|
|
||
|
|
DEP_PATHS=$(get_env_specific_dependencies_recursive "$BINARY")
|
||
|
|
|
||
|
|
mkdir -p "$LIB"
|
||
|
|
echo "$DEP_PATHS" \
|
||
|
|
| xargs -n 1 -I'{}' cp {} "$LIB/"
|
||
|
|
|
||
|
|
chmod +w "$LIB"/*.dylib
|
||
|
|
|
||
|
|
while read -r obj; do
|
||
|
|
[ -z "$obj" ] && continue
|
||
|
|
OBJ_LEAF_NAME=$(echo "$obj" | awk -F'/' '{print $NF}')
|
||
|
|
# rewrite the install name of this obj file. completely optional.
|
||
|
|
# provides good default for future people who link to it.
|
||
|
|
install_name_tool -id "@rpath/$OBJ_LEAF_NAME" "$obj"
|
||
|
|
|
||
|
|
# iterate over every LC_LOAD_DYLIB command in the objfile
|
||
|
|
while read -r load; do
|
||
|
|
[ -z "$load" ] && continue
|
||
|
|
LOAD_LEAF_NAME=$(echo "$load" | awk -F'/' '{print $NF}')
|
||
|
|
# rewrite a LC_LOAD_DYLIB command in this obj file
|
||
|
|
# to point relative to @rpath
|
||
|
|
install_name_tool -change "$load" "@rpath/$LOAD_LEAF_NAME" "$obj"
|
||
|
|
done < <(get_env_specific_direct_dependencies "$obj")
|
||
|
|
done < <(cat <(echo "$BINARY") <(echo "$DEP_PATHS" | awk -F'/' -v l="$LIB" -v OFS='/' '{print l,$NF}'))
|
||
|
|
|
||
|
|
# define in our binary what it should expand the
|
||
|
|
# runtime search path @rpath to
|
||
|
|
install_name_tool -add_rpath "@loader_path/$LIBREL" "$BINARY"
|