second

nvm.sh

@@ -63,13 +63,11 @@ nvm_command_info() {
   local INFO
   COMMAND="${1}"
   if type "${COMMAND}" | nvm_grep -q hashed; then
-    INFO="$(type "${COMMAND}" | command sed -E 's/\(|\)//g' | command awk '{print $4}')"
+    INFO="$(type "${COMMAND}" | command awk '{ gsub(/[()]/,""); print $4 }')"
   elif type "${COMMAND}" | nvm_grep -q aliased; then
-    # shellcheck disable=SC2230
+    INFO="$(which "${COMMAND}") ($(type "${COMMAND}" | command awk "{ \$1=\$2=\$3=\$4=\"\"; sub(/^ */, \"\"); gsub(/[\\\`']/, \"\"); print}"))"
-    INFO="$(which "${COMMAND}") ($(type "${COMMAND}" | command awk '{ $1=$2=$3=$4="" ;print }' | command sed -e 's/^\ *//g' -Ee "s/\`|'//g"))"
   elif type "${COMMAND}" | nvm_grep -q "^${COMMAND} is an alias for"; then
-    # shellcheck disable=SC2230
+    INFO="$(which "${COMMAND}") ($(type "${COMMAND}" | command awk "{ \$1=\$2=\$3=\$4=\$5=\"\"; sub(/^ */, \"\"); print }"))"
-    INFO="$(which "${COMMAND}") ($(type "${COMMAND}" | command awk '{ $1=$2=$3=$4=$5="" ;print }' | command sed 's/^\ *//g'))"
   elif type "${COMMAND}" | nvm_grep -q "^${COMMAND} is /"; then
     INFO="$(type "${COMMAND}" | command awk '{print $3}')"
   else
@@ -87,7 +85,7 @@ nvm_has_colors() {
 }
 
 nvm_curl_libz_support() {
-  curl -V 2>/dev/null | nvm_grep "^Features:" | nvm_grep -q "libz"
+  curl -V 2>/dev/null | command awk '/^Features:.*libz/ { found=1; exit } END { exit (found ? 0 : 1) }'
 }
 
 nvm_curl_use_compression() {
@@ -532,9 +530,13 @@ $(nvm_wrap_with_color_code 'y' "${warn_text}")"
 nvm_process_nvmrc() {
   local NVMRC_PATH
   NVMRC_PATH="$1"
-  local lines
 
-  lines=$(command sed 's/#.*//' "$NVMRC_PATH" | command sed 's/^[[:space:]]*//;s/[[:space:]]*$//' | nvm_grep -v '^$')
+  local lines
+  lines=$(command awk '{
+    sub(/#.*/, "")
+    gsub(/^[[:space:]]+|[[:space:]]+$/, "")
+    if (length($0) > 0) print
+  }' "$NVMRC_PATH")
 
   if [ -z "$lines" ]; then
     nvm_nvmrc_invalid_msg "${lines}"
@@ -1531,19 +1533,32 @@ nvm_ls() {
     fi
     if [ -n "${NVM_DIRS_TO_SEARCH1}${NVM_DIRS_TO_SEARCH2}${NVM_DIRS_TO_SEARCH3}" ]; then
       VERSIONS="$(command find "${NVM_DIRS_TO_SEARCH1}"/* "${NVM_DIRS_TO_SEARCH2}"/* "${NVM_DIRS_TO_SEARCH3}"/* -name . -o -type d -prune -o -path "${PATTERN}*" \
-        | command sed -e "
+        | command awk \
-            s#${NVM_VERSION_DIR_IOJS}/#versions/${NVM_IOJS_PREFIX}/#;
+            -v dir_iojs="${NVM_VERSION_DIR_IOJS}" \
-            s#^${NVM_DIR}/##;
+            -v iojs_prefix="versions/${NVM_IOJS_PREFIX}/" \
-            \\#^[^v]# d;
+            -v dir="${NVM_DIR}" \
-            \\#^versions\$# d;
+            -v search="${SEARCH_PATTERN}" \
-            s#^versions/##;
+            -v node_prefix="${NVM_NODE_PREFIX}" '
-            s#^v#${NVM_NODE_PREFIX}/v#;
+            {
-            \\#${SEARCH_PATTERN}# !d;
+              sub(dir_iojs"/", iojs_prefix)
-          " \
+              sub("^" dir "/", "")
-          -e 's#^\([^/]\{1,\}\)/\(.*\)$#\2.\1#;' \
+              if ($0 ~ /^[^v]/) next
+              if ($0 == "versions") next
+              sub(/^versions\//, "")
+              sub(/^v/, node_prefix"/v")
+              if ($0 !~ search) next
+              sub(/^([^/]+)\/(.*)$/, "\\2.\\1")
+              print
+            }
+          ' \
           | command sort -t. -u -k 1.2,1n -k 2,2n -k 3,3n \
-        | command sed -e 's#\(.*\)\.\([^\.]\{1,\}\)$#\2-\1#;' \
+          | command awk -v node_prefix="${NVM_NODE_PREFIX}" '
-                      -e "s#^${NVM_NODE_PREFIX}-##;" \
+              {
+                sub(/^(.*)\.([^.]*)$/, "\\2-\\1")
+                sub("^" node_prefix"-", "")
+                print
+              }
+            '
           )"
     fi
   fi
@@ -1993,7 +2008,28 @@ nvm_print_implicit_alias() {
       NVM_IOJS_VERSION="$(${NVM_COMMAND})" &&:
       EXIT_CODE="$?"
       if [ "_${EXIT_CODE}" = "_0" ]; then
-        NVM_IOJS_VERSION="$(nvm_echo "${NVM_IOJS_VERSION}" | command sed "s/^${NVM_IMPLICIT}-//" | nvm_grep -e '^v' | command cut -c2- | command cut -d . -f 1,2 | uniq | command tail -1)"
+        NVM_IOJS_VERSION="$(nvm_echo "${NVM_IOJS_VERSION}" | command awk -v prefix="^${NVM_IMPLICIT}-" '
+          BEGIN {
+            last = ""
+            prev = ""
+          }
+          {
+            sub(prefix, "")
+            # skip lines that do not start with "v"
+            if ($0 !~ /^v/) next
+            # remove leading "v"
+            sub(/^v/, "")
+            # keep only major.minor
+            split($0, parts, "\\.")
+            short = parts[1] "." parts[2]
+            # replicate "uniq" by only updating if changed
+            if (short != prev) {
+              last = short
+              prev = short
+            }
+          }
+          END { print last }
+        ')"
       fi
 
       if [ "_$NVM_IOJS_VERSION" = "_N/A" ]; then