1 files changed, 269 insertions, 0 deletions
diff --git a/gitstatus/install b/gitstatus/install
new file mode 100755
index 00000000..f747015c
--- /dev/null
+++ b/gitstatus/install
@@ -0,0 +1,269 @@
+#!/bin/sh
+#
+# This script does not have a stable API.
+
+_gitstatus_install_main() {
+  if [ -n "${ZSH_VERSION:-}" ]; then
+    emulate -L sh -o no_unset
+  else
+    set -u
+  fi
+
+  local argv1=$1
+  shift
+
+  local no_check= no_install= uname_s= uname_m= gitstatus_dir=
+  local opt= OPTARG= OPTIND=1
+
+  while getopts ':s:m:d:fnh' opt "$@"; do
+    case "$opt" in
+      h)
+        command cat <<\END
+Usage: install [-s KERNEL] [-m ARCH] [-d DIR] [-f|-n] [-- CMD [ARG]...]
+
+If positional arguments are specified, call this on success:
+
+  CMD [ARG]... DAEMON VERSION INSTALLED
+
+DAEMON is path to gitstatusd. VERSION is a glob pattern for the
+version this daemon should support; it's supposed to be passed as
+-G to gitstatusd. INSTALLED is 1 if gitstatusd has just been
+downloaded and 0 otherwise.
+
+Options:
+
+  -s KERNEL  use this instead of lowercase `uname -s`
+  -m ARCH    use this instead of lowercase `uname -m`
+  -d DIR     use this instead of `dirname "$0"`
+  -f         download gitstatusd even if there is one locally
+  -n         do not download gitstatusd (fail instead)
+END
+        return
+      ;;
+      n)
+        if [ -n "$no_install" ]; then
+          >&2 echo "[gitstatus] error: duplicate option: -$opt"
+          return 1
+        fi
+        no_install=1
+      ;;
+      f)
+        if [ -n "$no_check" ]; then
+          >&2 echo "[gitstatus] error: duplicate option: -$opt"
+          return 1
+        fi
+        no_check=1
+      ;;
+      d)
+        if [ -n "$gitstatus_dir" ]; then
+          >&2 echo "[gitstatus] error: duplicate option: -$opt"
+          return 1
+        fi
+        if [ -z "$OPTARG" ]; then
+          >&2 echo "[error] incorrect value of -$opt: $OPTARG"
+          return 1
+        fi
+        gitstatus_dir="$OPTARG"
+      ;;
+      m)
+        if [ -n "$uname_m" ]; then
+          >&2 echo "[gitstatus] error: duplicate option: -$opt"
+          return 1
+        fi
+        if [ -z "$OPTARG" ]; then
+          >&2 echo "[error] incorrect value of -$opt: $OPTARG"
+          return 1
+        fi
+        uname_m="$OPTARG"
+      ;;
+      s)
+        if [ -n "$uname_s" ]; then
+          >&2 echo "[gitstatus] error: duplicate option: -$opt"
+          return 1
+        fi
+        if [ -z "$OPTARG" ]; then
+          >&2 echo "[error] incorrect value of -$opt: $OPTARG"
+          return 1
+        fi
+        uname_s="$OPTARG"
+      ;;
+      \?) >&2 echo "[gitstatus] error: invalid option: -$OPTARG"           ; return 1;;
+      :)  >&2 echo "[gitstatus] error: missing required argument: -$OPTARG"; return 1;;
+      *)  >&2 echo "[gitstatus] internal error: unhandled option: -$opt"   ; return 1;;
+    esac
+  done
+
+  shift "$((OPTIND - 1))"
+
+  : "${gitstatus_dir:=$argv1}"
+
+  if [ -n "$no_check" -a -n "$no_install" ]; then
+    >&2 echo "[gitstatus] error: incompatible options: -f, -n"
+    return 1
+  fi
+
+  if [ -z "$uname_s" ]; then
+    uname_s="$(command uname -s)" || return
+    uname_s="$(printf '%s' "$uname_s" | command tr '[A-Z]' '[a-z]')" || return
+  fi
+  if [ -z "$uname_m" ]; then
+    uname_m="$(command uname -m)" || return
+    uname_m="$(printf '%s' "$uname_m" | command tr '[A-Z]' '[a-z]')" || return
+  fi
+
+  local daemon="${GITSTATUS_DAEMON:-}"
+  local cache_dir="${GITSTATUS_CACHE_DIR:-${XDG_CACHE_HOME:-$HOME/.cache}/gitstatus}"
+
+  if [ -z "$no_check" ]; then
+    if [ -n "${daemon##/*}" ]; then
+      >&2 echo "[gitstatus] error: GITSTATUS_DAEMON is not absolute path: $daemon"
+      return 1
+    fi
+    if [ -z "$daemon" ]; then
+      daemon="$gitstatus_dir"/usrbin/gitstatusd
+      if [ ! -e "$daemon" ]; then
+        daemon="$daemon"-"$uname_s"-"$uname_m"
+        if [ ! -e "$daemon" ]; then
+          daemon=
+        fi
+      fi
+    fi
+    if [ -n "$daemon" ]; then
+      local gitstatus_version= libgit2_version=
+      if ! . "$gitstatus_dir"/build.info; then
+        >&2 echo "[gitstatus] internal error: failed to source build.info"
+        return 1
+      fi
+      if [ -z "$gitstatus_version" ]; then
+        >&2 echo "[gitstatus] internal error: empty gitstatus_version in build.info"
+        return 1
+      fi
+      [ $# = 0 ] || "$@" "$daemon" "$gitstatus_version" 0
+      return
+    fi
+  fi
+
+  while IFS= read -r line; do
+    line="${line###*}"
+    [ -n "$line" ] || continue
+
+    local uname_s_glob= uname_m_glob= file= version=
+    eval "$line" || return
+
+    if [ -z "$uname_s_glob" -o -z "$uname_m_glob" -o -z "$file" -o -z "$version" ]; then
+      >&2 echo "[gitstatus] internal error: invalid install.info line: $line"
+      return 1
+    fi
+
+    case "$uname_s" in
+      $uname_s_glob) ;;
+      *) continue;;
+    esac
+    case "$uname_m" in
+      $uname_m_glob) ;;
+      *) continue;;
+    esac
+
+    # Found a match. The while loop will terminate during this iteration.
+
+    if [ -z "$no_check" ]; then
+      # Check if a suitable gitstatusd already exists.
+      local daemon="$cache_dir"/"$file"
+      if [ -e "$daemon" ]; then
+        [ $# = 0 ] || "$@" "$daemon" "$version" 0
+        return
+      fi
+      daemon="$daemon"-"$uname_s"-"$uname_m"
+      if [ -e "$daemon" ]; then
+        local gitstatus_version= libgit2_version=
+        if ! . "$gitstatus_dir"/build.info; then
+          >&2 echo "[gitstatus] internal error: failed to source build.info"
+          return 1
+        fi
+        if [ -z "$gitstatus_version" ]; then
+          >&2 echo "[gitstatus] internal error: empty gitstatus_version in build.info"
+          return 1
+        fi
+        [ $# = 0 ] || "$@" "$daemon" "$gitstatus_version" 0
+        return
+      fi
+    fi
+
+    # No suitable gitstatusd exists. Need to download.
+
+    if [ -n "$no_install" ]; then
+      >&2 echo "[gitstatus] error: no gitstatusd found and installation is disabled"
+      return 1
+    fi
+
+    local daemon="$cache_dir"/"$file"
+
+    if [ -n "${cache_dir##/*}" ]; then
+      >&2 echo "[gitstatus] error: GITSTATUS_CACHE_DIR is not absolute: $cache_dir"
+      return 1
+    fi
+    [ -d "$cache_dir" ] || mkdir -p -- "$cache_dir" || return
+
+    local url="https://github.com/romkatv/gitstatus/releases/download/$version/$file.tar.gz"
+    local archive="$cache_dir"/"$file".tmp.$$.tar.gz
+    if command -v curl >/dev/null 2>&1; then
+      if ! err="$(command curl -fsSLo "$archive" -- "$url" 2>&1)"; then
+        >&2 echo "[gitstatus] error: failed to download gitstatusd: $url"
+        >&2 printf "%s\n" "$err"
+        return 1
+      fi
+    elif command -v wget >/dev/null 2>&1; then
+      if ! err="$(command wget -O "$archive" -- "$url" 2>&1)"; then
+        >&2 echo "[gitstatus] error: failed to download gitstatusd: $url"
+        >&2 printf "%s\n" "$err"
+        return 1
+      fi
+    else
+      >&2 echo "[gitstatus] error: please install curl or wget"
+      return 1
+    fi
+
+    (
+      if [ -n "${ZSH_VERSION:-}" ]; then
+        builtin cd -q -- "$cache_dir" || return
+      else
+        cd -- "$cache_dir" || return
+      fi
+
+      local old=
+      if [ -e "$daemon" ]; then
+        local i=1
+        while :; do
+          old="$daemon"."$i"
+          [ -e "$old" ] || break
+          i="$((i+1))"
+        done
+        command mv -f -- "$daemon" "$old" || return
+      fi
+
+      command tar -xzf "$archive"
+      local ret=$?
+      command rm -f -- "$archive"
+      if [ -n "$old" ]; then
+        if [ "$ret" = 0 ]; then
+          command rm -f -- "$old" 2>/dev/null
+        else
+          command mv -f -- "$old" "$daemon"
+        fi
+      fi
+      exit "$ret"
+    ) || return
+
+    [ $# = 0 ] || "$@" "$daemon" "$version" 1
+    return
+  done <"$gitstatus_dir"/install.info
+
+  >&2 echo "[gitstatus] error: no gitstatusd found for $uname_s $uname_m"
+  return 1
+}
+
+if [ -z "${0##*/*}" ]; then
+  _gitstatus_install_main "${0%/*}" "$@"
+else
+  _gitstatus_install_main . "$@"
+fi