mirror of
https://github.com/Homebrew/brew.git
synced 2025-07-14 16:09:03 +08:00
9e4fb40f92
Note that the `HOMEBREW_FORCE_BREWED_` vars are automatically set if the system `git` and `curl` are too old. Drop mention of `HOMEBREW_GIT` which isn't user-settable.
145 lines
2.9 KiB
Bash
Executable File
145 lines
2.9 KiB
Bash
Executable File
#!/bin/bash
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# This script because we support $HOMEBREW_GIT, $HOMEBREW_SVN, etc., Xcode-only and
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# no Xcode/CLT configurations. Order is careful to be what the user would want.
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set +o posix
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quiet_safe_cd() {
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cd "$1" >/dev/null || { echo "Error: failed to cd to $1" >&2; exit 1; }
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}
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absdir() {
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quiet_safe_cd "${1%/*}/" && pwd -P
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}
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dirbasepath() {
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local dir="$1"
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local base="${2##*/}"
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echo "$dir/$base"
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}
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realpath() {
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local path="$1"
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local dir
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local dest
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dir="$(absdir "$path")"
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path="$(dirbasepath "$dir" "$path")"
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while [[ -L "$path" ]]
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do
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dest="$(readlink "$path")"
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if [[ "$dest" = "/"* ]]
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then
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path="$dest"
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else
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path="$dir/$dest"
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fi
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dir="$(absdir "$path")"
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path="$(dirbasepath "$dir" "$path")"
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done
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echo "$path"
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}
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executable() {
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local file="$1"
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[[ -f "$file" && -x "$file" ]]
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}
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lowercase() {
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echo "$1" | tr "[:upper:]" "[:lower:]"
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}
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safe_exec() {
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local arg0="$1"
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if ! executable "$arg0"
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then
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return
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fi
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# prevent fork-bombs
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if [[ "$(lowercase "$arg0")" = "$SCM_FILE" || "$(realpath "$arg0")" = "$SCM_REAL" ]]
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then
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return
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fi
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if [[ "$HOMEBREW" = "print-path" ]]
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then
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local dir="$(quiet_safe_cd "${arg0%/*}/" && pwd)"
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local path="$(dirbasepath "$dir" "$arg0")"
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echo "$path"
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exit
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fi
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exec "$@"
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}
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SCM_FILE="${0##*/}"
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SCM_REAL="$(realpath "$0")"
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SCM_DIR="$(quiet_safe_cd "${SCM_REAL%/*}/" && pwd -P)"
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if [[ "$1" = --homebrew=* ]]
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then
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HOMEBREW="${1:11}"
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shift
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fi
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case "$(lowercase "$SCM_FILE")" in
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git)
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if [[ -n "$HOMEBREW_GIT" && "$HOMEBREW_GIT" != git ]]
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then
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safe_exec "$(type -P "$HOMEBREW_GIT")" "$@"
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fi
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;;
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svn)
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if [[ -n "$HOMEBREW_SVN" && "$HOMEBREW_SVN" != svn ]]
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then
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safe_exec "$(type -P "$HOMEBREW_SVN")" "$@"
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fi
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;;
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esac
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brew_prefix_version="$(quiet_safe_cd "$SCM_DIR/../../../../../bin" 2>/dev/null && pwd -P)/$SCM_FILE"
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safe_exec "$brew_prefix_version" "$@"
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brew_repo_version="$(quiet_safe_cd "$SCM_DIR/../../../../bin" && pwd -P)/$SCM_FILE"
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safe_exec "$brew_repo_version" "$@"
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IFS=$'\n'
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for path in $(type -aP "$SCM_FILE")
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do
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if [[ "$path" != "/usr/bin/$SCM_FILE" ]]
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then
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safe_exec "$path" "$@"
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fi
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done
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unset IFS
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if executable "/usr/bin/xcode-select"
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then
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# xcode-select will return empty on no Xcode/CLT configuration.
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# /usr/bin/<tool> will be a popup stub under such configuration.
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# xcrun hangs if xcode-select is set to "/"
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xcode_path="$(/usr/bin/xcode-select -print-path 2>/dev/null)"
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if [[ -z "$xcode_path" ]]
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then
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if [[ "$HOMEBREW_MACOS_VERSION_NUMERIC" -ge "100900" ]]
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then
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popup_stub=1
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fi
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fi
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if [[ -z "$popup_stub" && "$xcode_path" != "/" ]]
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then
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path="$(/usr/bin/xcrun -find "$SCM_FILE" 2>/dev/null)"
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safe_exec "$path" "$@"
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fi
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fi
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path="/Applications/Xcode.app/Contents/Developer/usr/bin/$SCM_FILE"
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safe_exec "$path" "$@"
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path="/usr/bin/$SCM_FILE"
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[[ -z "$popup_stub" ]] && safe_exec "$path" "$@"
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echo "You must: brew install $SCM_FILE" >&2
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exit 1
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