mail: Fix checkmail script password bugging

Fixed script to only ask for password once before understanding that the
user does not want to provide it.

Since gpg seems to not differentiate between a *wrongly* entered
password and one entered not at all, we have to assume the user canceled
the password prompt and not bug him again until the next time the script
is invoked.
It will, however, at least notify the user that the process is aborted
in a quick notification message, so that if it was done on accident the
user will still know what's up.

mail/.local/bin/mail-check

@@ -20,71 +20,81 @@
 PASSWORD_FILE="$HOME/.local/share/pass/misc/aerc-gmail-app-password.gpg"
 
 prehook() {
-  if [ -n "$MBSYNC_PRE" ]; then
+    if [ -n "$MBSYNC_PRE" ]; then
-    eval "$MBSYNC_PRE"
+        eval "$MBSYNC_PRE"
-    return 0
+        return 0
-  fi
+    fi
-  imapfilter -c "${XDG_CONFIG_HOME:-/home/marty/.config}/imapfilter/config.lua"
+    imapfilter -c "${XDG_CONFIG_HOME:-/home/marty/.config}/imapfilter/config.lua"
 }
 
 posthook() {
-  if [ -n "$MBSYNC_POST" ]; then
+    if [ -n "$MBSYNC_POST" ]; then
-    eval "$MBSYNC_POST"
+        eval "$MBSYNC_POST"
-    return 0
+        return 0
-  fi
+    fi
 
-  notmuch new 2>/dev/null
+    notmuch new 2>/dev/null
-  afew --tag --new
+    afew --tag --new
-  afew --move-mail --new
+    afew --move-mail --new
-  afew --tag --new
+    afew --tag --new
-  notmuch_foldertags
+    notmuch_foldertags
-  countnew
+    countnew
 }
 
 # use notmuch to index incoming mail and set the
 # correct number of mails if new ones arrived for notifications
 countnew() {
-  num=$(notmuch count tag:unread and tag:inbox)
+    num=$(notmuch count tag:unread and tag:inbox)
-  HASMAIL="${num:-0}"
+    HASMAIL="${num:-0}"
 }
 
 # fail the routine and optionally send a message why
 fail() {
-  [ -n "$1" ] && echo "$1"
+    [ -n "$1" ] && echo "$1"
-  exit 1
+    exit 1
 }
 
 checkmail() {
-  mbsync -c "${XDG_CONFIG_HOME:-$HOME/.config}/isync/mbsyncrc" -a
+    mbsync -c "${XDG_CONFIG_HOME:-$HOME/.config}/isync/mbsyncrc" -a
 }
 
 checkonline() {
-  # Ping 1.1.1.1 to confirm that we are on the internet
+    # Ping 1.1.1.1 to confirm that we are on the internet
-  ping -c 1 "1.1.1.1" >/dev/null 2>/dev/null || fail "checkmail can not access the internet."
+    ping -c 1 "1.1.1.1" >/dev/null 2>/dev/null || fail "checkmail can not access the internet."
 }
 
 # warn user that he has to enter his password in a moment
 # to stop catching him offguard or entering something by accident
 checkwarnuser() {
-  agt=$(gpg2 --decrypt --no-tty --quiet --no-verbose --for-your-eyes-only --pinentry-mode cancel "$PASSWORD_FILE" 2>&1)
+    agt=$(gpg2 --decrypt --no-tty --quiet --no-verbose --for-your-eyes-only --pinentry-mode cancel "$PASSWORD_FILE" 2>&1)
-  if echo "$agt" | grep -qE 'No secret key'; then
+    if echo "$agt" | grep -qE 'No secret key'; then
-    notify "Mail: Password phrase needed!"
+        notify "Mail" "Password phrase needed!"
-    sleep 2.5
+        sleep 2.5
-  fi
+    fi
+}
+
+enablegpgagent() {
+    ## get password from user
+    agt=$(gpg2 --decrypt --no-tty --quiet --no-verbose --for-your-eyes-only --pinentry-mode ask "$PASSWORD_FILE" 2>&1)
+    ## exit program after first failed attempt
+    if echo "$agt" | grep -qE 'decryption failed'; then
+        notify "Mail" "Process aborted."
+        exit 1
+    fi
 }
 
 # send out a notification on new mail, to libnotify and stdout
 notifymail() {
-  [ "${MBSYNC_NOTIFY:-1}" -eq 0 ] && return
+    [ "${MBSYNC_NOTIFY:-1}" -eq 0 ] && return
 
-  if [ "${HASMAIL:-0}" -gt 0 ]; then
+    if [ "${HASMAIL:-0}" -gt 0 ]; then
-    notify "($HASMAIL) new mail"
+        notify "Mail" "New Mail ($HASMAIL)"
-  fi
+    fi
 }
 
 notify() {
-  command -v notify-send >/dev/null && notify-send "$@"
+    command -v notify-send >/dev/null && notify-send "$@"
-  echo "$@"
+    echo "$@"
 }
 
 # Routine start
@@ -93,38 +103,40 @@ notify() {
 
 # skip any retries and pre/post hooks, just run mbsync
 if [ "$1" = "raw" ]; then
-  checkmail
+    checkmail
-  exit
+    exit
 fi
 
 main() {
-  checkwarnuser
+    checkwarnuser
 
-  prehook
+    enablegpgagent
 
-  tries=0
+    prehook
-  while true; do
-    if checkmail; then
-      break
-    fi
 
-    tries=$((tries + 1))
+    tries=0
-    if [ $tries -gt "${MBSYNC_MAX_TRIES:-3}" ]; then
+    while true; do
-      fail "maximum retries reached without success."
+        if checkmail; then
-    fi
+            break
-  done
+        fi
-  unset tries
 
-  posthook
+        tries=$((tries + 1))
+        if [ $tries -gt "${MBSYNC_MAX_TRIES:-3}" ]; then
+            fail "maximum retries reached without success."
+        fi
+    done
+    unset tries
 
-  notifymail
+    posthook
+
+    notifymail
 }
 
 notmuch_foldertags() {
-  notmuch tag +dump -inbox -deleted -- folder:Dump and not folder:Inbox
+    notmuch tag +dump -inbox -deleted -- folder:Dump and not folder:Inbox
-  notmuch tag +archived -inbox -deleted -- folder:Archive and not folder:Inbox
+    notmuch tag +archived -inbox -deleted -- folder:Archive and not folder:Inbox
-  notmuch tag +deleted -inbox -archived -- folder:Trash and not folder:Inbox
+    notmuch tag +deleted -inbox -archived -- folder:Trash and not folder:Inbox
-  notmuch tag -inbox -- not folder:Inbox
+    notmuch tag -inbox -- not folder:Inbox
 }
 
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