From b1262b8f4e8199d067390617b3362dd44c667b6e Mon Sep 17 00:00:00 2001
From: Mike Crute <mike@crute.us>
Date: Sat, 24 Sep 2022 09:35:36 -0700
Subject: Prefer running ssh agent

---
 .bashrc | 55 ++++++++++++++++++++++++++++++++-----------------------
 1 file changed, 32 insertions(+), 23 deletions(-)

diff --git a/.bashrc b/.bashrc
index b66a75f..70ce621 100644
--- a/.bashrc
+++ b/.bashrc
@@ -633,31 +633,40 @@ function get_ssh_agent
         esac
     done
 
-    for path in "${TMPDIR:-/tmp}"/ssh-*/agent.*; do
-        basepath=$(basename $path)
-        sockpath=$(dirname $path)
-
-        export SSH_AUTH_SOCK=${path}
-        export SSH_AGENT_PID=${basepath##agent.}
-
-        # When no files are present matching the pattern the pattern itself is
-        # passed through. shopt -s nullglob would fix this but too much
-        # fiddling to make it work without polluting the parent shell state.
-        if [[ "$SSH_AGENT_PID" == "*" ]]; then
-            [[ -n "$debug" ]] && echo "No agents found"
-            break
-        fi
+    # Prefer to use the running agent if there's one already running.
+    # Otherwise try to figure out where a suitable agent is and connect.
+    # to it.
+    if ! _ssh_agent_is_running; then
+        [[ -n "$debug" ]] && echo "No agent running, commencing search..."
+
+        for path in "${TMPDIR:-/tmp}"/ssh-*/agent.*; do
+            basepath=$(basename $path)
+            sockpath=$(dirname $path)
+
+            export SSH_AUTH_SOCK=${path}
+            export SSH_AGENT_PID=${basepath##agent.}
+
+            # When no files are present matching the pattern the pattern itself is
+            # passed through. shopt -s nullglob would fix this but too much
+            # fiddling to make it work without polluting the parent shell state.
+            if [[ "$SSH_AGENT_PID" == "*" ]]; then
+                [[ -n "$debug" ]] && echo "No agents found"
+                break
+            fi
 
-        [[ -n "$debug" ]] && echo -n "Trying ${SSH_AUTH_SOCK} for ${SSH_AGENT_PID}... "
+            [[ -n "$debug" ]] && echo -n "Trying ${SSH_AUTH_SOCK} for ${SSH_AGENT_PID}... "
 
-        if _ssh_agent_is_running; then
-            [[ -n "$debug" ]] && echo "Success"
-            break
-        else
-            [[ -n "$debug" ]] && echo "Failure... removing ${sockpath}"
-            rm -rf "$sockpath"
-        fi
-    done
+            if _ssh_agent_is_running; then
+                [[ -n "$debug" ]] && echo "Success"
+                break
+            else
+                [[ -n "$debug" ]] && echo "Failure... removing ${sockpath}"
+                rm -rf "$sockpath"
+            fi
+        done
+    else
+        [[ -n "$debug" ]] && echo "Using already running agent..."
+    fi
 
     # If the agent still isn't connected after sourcing our local agent
     # state file then it probably isn't running at all. Start a new
-- 
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