From 209f09dc5cde22b913217812fe3dca5c12241489 Mon Sep 17 00:00:00 2001
From: Georg
Date: Thu, 2 Dec 2021 22:29:26 +0100
Subject: fish greeting with ssh-agent magic

Signed-off-by: Georg <georg@lysergic.dev>
---
 scripts/fish/conf.d/greeting.fish                    |  3 +++
 scripts/fish/conf.d/sshagent.fish                    | 16 ++++++++++++++++
 scripts/fish/functions/__ssh_agent_is_key_added.fish |  9 +++++++++
 scripts/fish/functions/__ssh_agent_is_started.fish   | 15 +++++++++++++++
 scripts/fish/functions/__ssh_agent_start.fish        |  6 ++++++
 5 files changed, 49 insertions(+)
 create mode 100644 scripts/fish/conf.d/greeting.fish
 create mode 100644 scripts/fish/conf.d/sshagent.fish
 create mode 100644 scripts/fish/functions/__ssh_agent_is_key_added.fish
 create mode 100644 scripts/fish/functions/__ssh_agent_is_started.fish
 create mode 100644 scripts/fish/functions/__ssh_agent_start.fish

diff --git a/scripts/fish/conf.d/greeting.fish b/scripts/fish/conf.d/greeting.fish
new file mode 100644
index 0000000..9d584e4
--- /dev/null
+++ b/scripts/fish/conf.d/greeting.fish
@@ -0,0 +1,3 @@
+function fish_greeting
+echo "Welcome!"
+end
diff --git a/scripts/fish/conf.d/sshagent.fish b/scripts/fish/conf.d/sshagent.fish
new file mode 100644
index 0000000..c60b360
--- /dev/null
+++ b/scripts/fish/conf.d/sshagent.fish
@@ -0,0 +1,16 @@
+# original from https://github.com/danhper/fish-ssh-agent/
+# adapted to include ssh-add check
+function sshagent
+        if test -z "$SSH_ENV"
+            set -xg SSH_ENV $HOME/.ssh/environment
+        end
+
+        if not __ssh_agent_is_started
+            __ssh_agent_start
+        end
+
+        if not __ssh_agent_is_key_added
+                echo "You need to authenticate."
+                ssh-add -q ~/.ssh/id_lysergic
+        end
+end
diff --git a/scripts/fish/functions/__ssh_agent_is_key_added.fish b/scripts/fish/functions/__ssh_agent_is_key_added.fish
new file mode 100644
index 0000000..63951fe
--- /dev/null
+++ b/scripts/fish/functions/__ssh_agent_is_key_added.fish
@@ -0,0 +1,9 @@
+# custom
+function __ssh_agent_is_key_added -d "checks if fingerprint is already present"
+        set SSH_FP (ssh-keygen -lf ~/.ssh/id_lysergic-cert.pub | awk '{print $2}')
+        if ! test -z "$SSH_FP"
+                and ssh-add -l | grep -q "$SSH_FP"
+        else
+                return 1
+        end
+end
diff --git a/scripts/fish/functions/__ssh_agent_is_started.fish b/scripts/fish/functions/__ssh_agent_is_started.fish
new file mode 100644
index 0000000..a457102
--- /dev/null
+++ b/scripts/fish/functions/__ssh_agent_is_started.fish
@@ -0,0 +1,15 @@
+# from https://github.com/danhper/fish-ssh-agent/
+function __ssh_agent_is_started -d "check if ssh agent is already started"
+        if begin; test -f $SSH_ENV; and test -z "$SSH_AGENT_PID"; end
+                source $SSH_ENV > /dev/null
+        end
+
+        if begin; test -z "$SSH_AGENT_PID"; and test -z "$SSH_CONNECTION"; end
+                return 1
+        end
+
+        ssh-add -l > /dev/null 2>&1
+        if test $status -eq 2
+                return 1
+        end
+end
diff --git a/scripts/fish/functions/__ssh_agent_start.fish b/scripts/fish/functions/__ssh_agent_start.fish
new file mode 100644
index 0000000..58a762d
--- /dev/null
+++ b/scripts/fish/functions/__ssh_agent_start.fish
@@ -0,0 +1,6 @@
+# from https://github.com/danhper/fish-ssh-agent/
+function __ssh_agent_start -d "start a new ssh agent"
+  ssh-agent -c | sed 's/^echo/#echo/' > $SSH_ENV
+  chmod 600 $SSH_ENV
+  source $SSH_ENV > /dev/null
+end
-- 
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