diff --git a/scripts/identity.sh b/scripts/identity.sh
index 9781d15..825d2d8 100755
--- a/scripts/identity.sh
+++ b/scripts/identity.sh
@@ -1,43 +1,46 @@
 #!/bin/sh
 
-if [ -z "$1" ]; then
-    echo "USAGE:";
-    echo "    git identity <gpg key id>";
-    echo;
+identities="$HOME/.local/share/git/identities";
 
-    echo "current identity:";
-    echo "    name  = $(git config user.name)";
-    echo "    email = $(git config user.email)";
-    echo "    key   = $(git config user.signingKey)";
-    exit 1;
-fi
+function add_identity() {
+    uid_regex="([^\(]*)\s*(\((.*)\))?\s*<(.*)>";
 
-uid_regex="([^\(]*)\s*(\((.*)\))?\s*<(.*)>";
+    uid=$(gpg --with-colons -K $1 | awk -F: '$1=="uid" {print $10; exit}');
 
-uid=$(gpg --with-colons -K $1 | awk -F: '$1=="uid" {print $10; exit}');
+    if [ -z "$uid" ]; then
+        echo "ERROR: found no gpg key matching this";
+        exit 1;
+    fi
 
-if [ -z "$uid" ]; then
-    echo "ERROR: found no gpg key matching this";
-    exit 1;
-fi
+    name=$(printf "$uid" | sed --regexp-extended -e "s/$uid_regex/\1/");
+    email=$(printf "$uid" | sed --regexp-extended -e "s/$uid_regex/\4/");
 
-name=$(printf "$uid" | sed --regexp-extended -e "s/$uid_regex/\1/");
-email=$(printf "$uid" | sed --regexp-extended -e "s/$uid_regex/\4/");
+    echo "using this identity:";
+    echo "    name  = $name";
+    echo "    email = $email";
 
-echo "using this identity:";
-echo "    name  = $name";
-echo "    email = $email";
+    git config --local user.name "$name"
+    git config --local user.email "$email"
 
-git config --local user.name "$name"
-git config --local user.email "$email"
+    keyid=$(gpg -K --with-colon $1 | awk -F: '$12~/.*s.*/ {print $5; exit}');
+    # TODO: if multiple found, bring up a dialog to select the right key
 
-keyid=$(gpg -K --with-colon $1 | awk -F: '$12~/.*s.*/ {print $5; exit}');
-# TODO: if multiple found, bring up a dialog to select the right key
+    if [ -z "$keyid" ]; then
+        echo "WARNING: found no subkey with signing capabilities. No signing key will be set";
+        git config --local --unset user.signingKey;
+    else
+        echo "    key   = $keyid";
+        git config --local user.signingKey "$keyid";
+    fi
+}
 
-if [ -z "$keyid" ]; then
-    echo "WARNING: found no subkey with signing capabilities. No signing key will be set";
-    git config --local --unset user.signingKey;
-else
-    echo "    key   = $keyid";
-    git config --local user.signingKey "$keyid";
-fi
+case $1 in
+    add)
+        add_identity $2
+    ;;
+    *)
+        echo "USAGE:";
+        echo "    git identity <command>";
+        exit 1;
+    ;;
+esac