rewrite piv-agent to sagent; fmt_note and fmt_into will write to stderr

.zshrc2

@@ -113,44 +113,7 @@ if [[ -x $(command -v trash) ]]; then
     alias "rm"="echo use the full path i.e. '/bin/rm'\; consider using trash"
 fi
 gbes() { git for-each-ref --sort=-committerdate refs/heads refs/remotes --format="%(authordate:format:%y-%m-%d.%a %H:%M %z)|%(color:red)%(objectname:short)|%(color:yellow)%(refname:short)%(color:reset)|%(color:reset)%(authorname): %(color:green)%(subject)" --color=always | column -ts"|" | less -FX }
-piv-agent()
-{
-    local agent_file="/tmp/piv-agent-$(whoami)"
-    if [[ -f $agent_file ]]; then
-        source $agent_file
-    fi
-    # they are: ubuntu, macos, respectively
-    local SO_PATHS=( "/usr/lib64/opensc-pkcs11.so" "/usr/local/lib/opensc-pkcs11.so" )
-    local SO_FILE
-    for SO_FILE in ${SO_PATHS[*]}; do
-        if [[ -f "$SO_FILE" ]]; then
-            break
-        fi
-    done
-    if [[ ! -f "$SO_FILE" ]]; then
-        echo "error: opensc-pkcs11.so not found"
-        return 1
-    fi
-    if ! ps -p "$SSH_AGENT_PID" > /dev/null; then
-        echo "launch agent using: $SO_FILE"
-        ret=$(ssh-agent -P "$SO_FILE")
-        echo "$ret" > $agent_file
-        eval "$ret"
-        if ! ps -p $SSH_AGENT_PID > /dev/null; then
-            echo "failed to launch agent"
-            return 1
-        fi
-    else
-        echo "using existing agent: $SSH_AGENT_PID"
-    fi
-    if ! ssh-add -l > /dev/null; then
-        echo "no keys found in this agent, let's add some"
-        ssh-add -s "$SO_FILE"
-    fi
-    pgrep ssh-agent | grep -v $SSH_AGENT_PID | xargs kill -9
-    echo "now available keys:"
-    ssh-add -l
-}
+piv-agent() { eval "$($DOTFILES/tools/sagent.sh $@)" }
 
 # key bindings
 bindkey "^b" beginning-of-line  # ctrl+b

tools/common.sh

@@ -75,11 +75,11 @@ fmt_warning() {
 }
 
 fmt_info() {
-    printf '%sinfo: %s\n' "${FMT_RESET}" "$*" >&1
+    printf '%sinfo: %s\n' "${FMT_RESET}" "$*" >&2
 }
 
 fmt_note() {
-    printf '%s%s%s\n' "${FMT_GREEN}" "$*" "${FMT_RESET}" >&1
+    printf '%s%s%s\n' "${FMT_GREEN}" "$*" "${FMT_RESET}" >&2
 }
 
 setup_color() {

tools/sagent.sh

@@ -0,0 +1,105 @@
+#!/bin/bash
+set -e
+THIS_DIR=$( cd "$( dirname "${BASH_SOURCE[0]:-${(%):-%x}}" )" && pwd )
+export DFS_COLOR=1
+source "$THIS_DIR/common.sh"
+
+
+find_so_file()
+{
+    local SO_PATHS=( "/usr/lib64/opensc-pkcs11.so" "/usr/local/lib/opensc-pkcs11.so" )
+    local SO_FILE
+    for SO_FILE in ${SO_PATHS[*]}; do
+        if [[ -f "$SO_FILE" ]]; then
+            echo "$SO_FILE"
+            return
+        fi
+    done
+}
+
+create_agent()
+{
+    local SO_FILE=$(find_so_file)
+    if [[ -n "$SO_FILE" ]]; then
+        fmt_note "opensc-pkcs11.so found"
+        SO_FILE="-P $SO_FILE"
+    fi
+    ssh-agent $SO_FILE
+}
+
+kill_agent()
+{
+    if pgrep -x ssh-agent > /dev/null; then
+        fmt_note "killing existing agent"
+        pkill -9 -x ssh-agent
+    fi
+}
+
+add_piv()
+{
+    local SO_FILE=$(find_so_file)
+    if [[ -n "$SO_FILE" ]]; then
+        echo ssh-add -s \"$SO_FILE\"
+    else
+        fmt_error "opensc-pkcs11.so not found"
+    fi
+    list
+}
+
+list()
+{
+    echo echo "available keys:"
+    echo ssh-add -l
+}
+
+reset()
+{
+    kill_agent
+    all
+}
+
+all()
+{
+    local agent_file="/tmp/piv-agent-$(whoami)"
+    if [[ -f $agent_file ]]; then
+        source $agent_file > /dev/null
+    else
+        touch $agent_file
+        chmod 600 $agent_file
+    fi
+    if ! ps -p "$SSH_AGENT_PID" > /dev/null; then
+        kill_agent
+        fmt_note "launching a new agent"
+        create_agent | tee $agent_file
+    else
+        fmt_note "using existing agent: $SSH_AGENT_PID"
+        cat $agent_file
+    fi
+}
+
+route()
+{
+    if [[ $# -eq 0 ]]; then
+        all
+        return
+    fi
+    case $1 in
+        kill)
+            kill_agent
+            ;;
+        piv)
+            add_piv
+            ;;
+        reset)
+            reset
+            ;;
+        list|ls)
+            list
+            ;;
+        *)
+            fmt_error "unknown command: $1"
+            ;;
+    esac
+}
+
+route "$@"

tools/test.zsh

@@ -18,6 +18,7 @@ grep -q ".zshrc2" ~/.zshrc
 dfs version
 dfs log 1
 dfs beacon gh.ci $GITHUB_SHA
+sagent
 z ~
 test ~ -ef "$(pwd)"
 dogo