dotfiles/zsh/path.zsh

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#!/usr/bin/env zsh
export PATH
export MANPATH
# tie these env variables to zsh arrays
export -T PKG_CONFIG_PATH pkg_config_path ':'
export -T LD_LIBRARY_PATH ld_library_path ':'
path_prepend() {
if (( $# < 1 )); then
print >&2 -r -- "usage: $0 <var_name> <value...>"
return 1
fi
local var_name="$1"; shift
local value; for value in "$@"; do
if eval "(( \${${var_name}[(ie)\$value]-1} > \${#${var_name}} ))"; then
eval "${var_name}=(\"\$value\" \"\${${var_name}[@]}\")"
fi
done
}
# glob modifiers used in this script:
#
# N - enables the null_glob option for a single glob pattern, in other words
# ignores an error when the pattern didn't match anything
#
# / - matches only directories
if (( _is_macos )); then
# GNU counterparts of command line utilities
path_prepend path /usr/local/opt/*/libexec/gnubin(N/)
path_prepend manpath /usr/local/opt/*/libexec/gnuman(N/)
# add some keg-only Homebrew formulas
for formula in curl file-formula openssl ruby; do
formula_path="/usr/local/opt/$formula"
if [[ ! -d "$formula_path" ]]; then
continue
fi
if [[ -d "$formula_path/bin" ]]; then
path_prepend path "$formula_path/bin"
fi
if [[ -d "$formula_path/lib/pkgconfig" ]]; then
path_prepend pkg_config_path "$formula_path/lib/pkgconfig"
fi
done; unset formula
# Use Python 3 executables by default, i.e. when a version suffix (`python3`)
# is not specified.
path_prepend path /usr/local/opt/python@3/libexec/bin
fi
if (( _is_macos )); then
# Python packages (for some reason they don't go into ~/.local/bin, but
# instead into the garbage ~/Library directory)
path_prepend path ~/Library/Python/*/bin(N/)
fi
# Ruby gems
path_prepend path ~/.gem/ruby/*/bin(N/)
path_prepend path ~/.local/share/gem/ruby/*/bin(N/)
# Yarn global packages
path_prepend path ~/.yarn/bin
# Go
export GOPATH=~/go
path_prepend path "$GOPATH/bin"
# Rust
rustup_home="${RUSTUP_HOME:-$HOME/.rustup}"
if [[ -f "$rustup_home"/settings.toml ]]; then
# Make a low-effort attempt at quickly extracting the selected Rust toolchain
# from rustup's settings. The TOML file is obviously assumed to be well-formed
# and syntactically correct because virtually always it's manipulated with the
# use of rustup's CLI. Also a shortcut is taken: strings aren't unescaped
# because Rust toolchain names don't need escaping in strings.
# See also <https://github.com/toml-lang/toml/blob/master/toml.abnf>.
rust_toolchain=""
< "$rustup_home"/settings.toml while IFS= read -r line; do
if [[ "$line" =~ '^default_toolchain = "(.+)"$' ]]; then
rust_toolchain="${match[1]}"
break
elif [[ "$line" == \[*\] ]]; then
break
fi
done; unset line
if [[ -n "$rust_toolchain" ]]; then
rust_sysroot="$rustup_home"/toolchains/"$rust_toolchain"
# path_append path "$rust_sysroot"/bin
path_prepend fpath "$rust_sysroot"/zsh/site-functions
path_prepend manpath "$rust_sysroot"/share/man
fi
for rust_sysroot in "$rustup_home"/toolchains/*(/); do
# The filenames of all libraries in toolchain dirs are suffixed with their
# build hashes or the compiler identifier, so in practice conflicts are
# insanely unlikely.
path_prepend ld_library_path "$rust_sysroot"/lib
done
fi
unset rustup_home rust_toolchain rust_sysroot
path_prepend path ~/.cargo/bin
# add my binaries and completions
path_prepend path "${ZSH_DOTFILES:h}/scripts"
path_prepend fpath "$ZSH_DOTFILES/completions"
# add user binaries
path_prepend path ~/.local/bin
unfunction path_prepend
# For some reason manpath is not always set when logging with ssh for instance.
# Let's ensure that it is always set and exported. The additional colon ensures
# that the system manpath isn't overwritten (see manpath(1)).
if [[ -n "$MANPATH" && "$MANPATH" != *: ]]; then
# Append a colon if MANPATH isn't empty and doesn't end with a colon already
MANPATH="$MANPATH:"
fi
export MANPATH="$MANPATH"