Merge pull request #14 from nodenv/major-vee

Support auto-aliasing major versions

bin/nodenv-alias

@@ -18,6 +18,33 @@ resolve_link() {
   $(type -p greadlink readlink | head -1) "$1"
 }
 
+# Setup for relative includes. Adapted from:
+# http://www.ostricher.com/2014/10/the-right-way-to-get-the-directory-of-a-bash-script/
+# http://stackoverflow.com/a/12694189/407845
+get_script_dir() {
+  local dir
+  local src="${BASH_SOURCE[0]}"
+
+  # while $src is a symlink, resolve it
+  while [ -h "$src" ]; do
+    dir="${src%/*}"
+    src="$( resolve_link "$src" )"
+
+    # If $src was a relative symlink (so no "/" as prefix),
+    # need to resolve it relative to the symlink base directory
+    [[ $src != /* ]] && src="$dir/$src"
+  done
+  dir="${src%/*}"
+
+  if [ -d "$dir" ]; then
+    echo "$dir"
+  else
+    echo "$PWD"
+  fi
+}
+
+SEMVER_SORT="$(get_script_dir)/../node_modules/sh-semver/semver.sh"
+
 list() {
   local exit=1
   local link
@@ -53,14 +80,10 @@ echo_lines_without_symlinks() {
 }
 
 sort_versions() {
-  local patch_start_point
+  local prefix=""
+  [[ $1 =~ (^[^.]*-).* ]] && prefix="${BASH_REMATCH[1]}"
 
-  case "$1" in
-    *.*.*) patch_start_point=$((${#1} + 3)) ;; # point_release string length + 1 (0 indexed) + 2 for `-p` separator
-    *.*)   patch_start_point=$((${#1} + 2)) ;; # point_release string length + 1 (0 indexed) + 1 for `.` separator
-  esac
-
-  sort -n -k "1.$patch_start_point"
+  sed -e "s/^$prefix//" | "$SEMVER_SORT" | sed -e "s/^/$prefix/"
 }
 
 auto_for_point() {
@@ -78,8 +101,22 @@ auto_symlink_point() {
   fi
 }
 
-point_releases() {
-  echo_lines_without_symlinks ./*.*.* | sed -e 's/\.[^-.]*$//' -e 's/-[^.]*$//' | sort -u
+pre_releases() {
+  echo_lines_without_symlinks ./*.*.*-*.* | sed -E -e 's/([0-9]+\.[0-9]+\.[0-9]+-.*)\..*/\1/' | sort -u
+}
+
+minor_releases() {
+  echo_lines_without_symlinks ./*.*.* | sed -E -e 's/([0-9]+\.[0-9]+)\.[0-9]+.*/\1/' | sort -u
+}
+
+major_releases() {
+  echo_lines_without_symlinks ./*.*.* | sed -E -e 's/([0-9]+)\.[0-9]+\.[0-9]+.*/\1/' | sort -u | grep -v 0
+}
+
+recommended_aliases() {
+  major_releases
+  minor_releases
+  pre_releases
 }
 
 abort() {
@@ -100,7 +137,7 @@ if [ --complete = "$1" ]; then
   elif [ "$#" = 0 ]; then
     echo --auto
     echo --list
-    { point_releases; echo_lines_with_symlinks ./*; } | sort -u
+    { recommended_aliases; echo_lines_with_symlinks ./*; } | sort -u
   fi
   exit 0
 fi
@@ -119,8 +156,8 @@ case "$#" in
       fi
     elif [ --auto = "$2" ]; then
       case "$1" in
-        *.*) cleanup_invalid "$1" && auto_symlink_point "$1" ;;
-        *) abort "Don't know how to automatically alias $1" ;;
+        *) cleanup_invalid "$1" && auto_symlink_point "$1" ;;
+        # *) abort "Don't know how to automatically alias $1" ;;
       esac
     else
       echo "$1 => $2"
@@ -135,7 +172,7 @@ case "$#" in
         ;;
       --auto | --all)
         cleanup_invalid
-        for point in $(point_releases); do
+        for point in $(recommended_aliases); do
           auto_symlink_point "$point"
         done
         ;;