From d38d18ec25736bfdf4c8739c7b40ec96c10fd0f3 Mon Sep 17 00:00:00 2001
From: Hongli Lai <honglilai@gmail.com>
Date: Wed, 23 Oct 2019 08:19:16 +0200
Subject: [PATCH 1/2] rbenv help: fix 'type: write error: Broken pipe'

Sometimes the command fails with a 'type: write error: Broken pipe'.
This is because 'head -1' only reads the first line, then exits.
If 'type' writes the second line after 'head -1' has already exited,
then the aforementioned error is triggered.

We fix this by buffering the entire output of 'type' before
invoking 'head -1'.
---
 libexec/rbenv-help | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/libexec/rbenv-help b/libexec/rbenv-help
index 0b7e926a..d1296d62 100755
--- a/libexec/rbenv-help
+++ b/libexec/rbenv-help
@@ -42,8 +42,13 @@ extract_initial_comment_block() {
 }
 
 collect_documentation() {
+  local all_awks
+  local first_awk
+  all_awks=$(type -p gawk awk)
+  first_awk=$(head -1 <<<"$all_awks")
+
   # shellcheck disable=SC2016
-  $(type -p gawk awk | head -1) '
+  "$first_awk" '
     /^Summary:/ {
       summary = substr($0, 10)
       next

From af454a32dc943a92125021690309086a17bd6802 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mislav=20Marohni=C4=87?= <mislav.marohnic@gmail.com>
Date: Wed, 23 Oct 2019 12:12:38 +0200
Subject: [PATCH 2/2] Silence errors when piping `type | head -1`

---
 libexec/rbenv          |  2 +-
 libexec/rbenv-help     | 12 +++++++-----
 libexec/rbenv-hooks    |  2 +-
 libexec/rbenv-versions |  2 +-
 4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/libexec/rbenv b/libexec/rbenv
index 4880df38..a1b9d69f 100755
--- a/libexec/rbenv
+++ b/libexec/rbenv
@@ -28,7 +28,7 @@ if enable -f "${BASH_SOURCE%/*}"/../libexec/rbenv-realpath.dylib realpath 2>/dev
 else
   [ -z "$RBENV_NATIVE_EXT" ] || abort "failed to load \`realpath' builtin"
 
-  READLINK=$(type -p greadlink readlink | head -1)
+  READLINK=$(type -p greadlink readlink 2>/dev/null | head -1)
   [ -n "$READLINK" ] || abort "cannot find readlink - are you missing GNU coreutils?"
 
   resolve_link() {
diff --git a/libexec/rbenv-help b/libexec/rbenv-help
index d1296d62..5b3af232 100755
--- a/libexec/rbenv-help
+++ b/libexec/rbenv-help
@@ -42,13 +42,15 @@ extract_initial_comment_block() {
 }
 
 collect_documentation() {
-  local all_awks
-  local first_awk
-  all_awks=$(type -p gawk awk)
-  first_awk=$(head -1 <<<"$all_awks")
+  local awk
+  awk="$(type -p gawk awk 2>/dev/null | head -1)"
+  if [ -z "$awk" ]; then
+    echo "rbenv: cannot find awk" >&2
+    return 1
+  fi
 
   # shellcheck disable=SC2016
-  "$first_awk" '
+  "$awk" '
     /^Summary:/ {
       summary = substr($0, 10)
       next
diff --git a/libexec/rbenv-hooks b/libexec/rbenv-hooks
index 010c7058..64334cc7 100755
--- a/libexec/rbenv-hooks
+++ b/libexec/rbenv-hooks
@@ -26,7 +26,7 @@ if ! enable -f "${BASH_SOURCE%/*}"/rbenv-realpath.dylib realpath 2>/dev/null; th
     echo "rbenv: failed to load \`realpath' builtin" >&2
     exit 1
   fi
-READLINK=$(type -p greadlink readlink | head -1)
+READLINK=$(type -p greadlink readlink 2>/dev/null | head -1)
 if [ -z "$READLINK" ]; then
   echo "rbenv: cannot find readlink - are you missing GNU coreutils?" >&2
   exit 1
diff --git a/libexec/rbenv-versions b/libexec/rbenv-versions
index d1a110ce..21a9bdf2 100755
--- a/libexec/rbenv-versions
+++ b/libexec/rbenv-versions
@@ -33,7 +33,7 @@ if ! enable -f "${BASH_SOURCE%/*}"/rbenv-realpath.dylib realpath 2>/dev/null; th
     exit 1
   fi
 
-  READLINK=$(type -p greadlink readlink | head -1)
+  READLINK=$(type -p greadlink readlink 2>/dev/null | head -1)
   if [ -z "$READLINK" ]; then
     echo "rbenv: cannot find readlink - are you missing GNU coreutils?" >&2
     exit 1