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-rw-r--r--Documentation/piem.texi10
-rw-r--r--piem-b4.el13
2 files changed, 14 insertions, 9 deletions
diff --git a/Documentation/piem.texi b/Documentation/piem.texi
index ca6a97b..f4bbabc 100644
--- a/Documentation/piem.texi
+++ b/Documentation/piem.texi
@@ -341,11 +341,11 @@ a non-nil value or by giving a prefix argument.
To generate the input thread, first any functions in
@code{piem-mid-to-thread-functions} are tried. This allows for a thread
to be retrieved from a local store (e.g., the Notmuch database). If
-that fails, the thread is downloaded from the public-inbox URL
-associated with the current buffer. Finally, if an inbox's entry in
-@code{piem-inboxes} doesn't specify a URL, @code{b4 am} is called
-without a local mbox, letting it download the thread according to its
-own configuration.
+that fails, try to download the thread from the @code{piem-inboxes} URL
+associated with the current buffer, provided the current buffer's
+message ID matches the one @code{piem-b4-am-from-mid} was called with.
+As a last resort, call @code{b4 am} without a local mbox to let it
+download the thread according to its own configuration.
@item i
@itemx M-x piem-b4-am-ready-from-mid
diff --git a/piem-b4.el b/piem-b4.el
index e76953e..ddb18d5 100644
--- a/piem-b4.el
+++ b/piem-b4.el
@@ -131,10 +131,15 @@ list of arguments specified via ARGS."
(defun piem-b4-am-from-mid (mid &optional args toggle-worktree)
"Get the thread for MID, extract an am-ready mbox, and apply it.
-Try to get a thread for the Message-Id MID with
-`piem-mid-to-thread-functions', falling back to letting b4
-download it. After calling `b4 am' with ARGS to prepare an
-am-ready mbox, feed the result to `git am'.
+Try to generate a thread for the Message-Id MID with
+`piem-mid-to-thread-functions'. If that fails, try to download
+the thread from the `piem-inboxes' URL associated with the
+current buffer, provided that the current buffer's message ID
+matches MID. And if that doesn't work, let `b4 am' download the
+thread according to its own configuration.
+
+After calling `b4 am' with ARGS to prepare an am-ready mbox, feed
+the result to `git am'.
When prefix argument TOGGLE-WORKTREE is non-nil, invert the
meaning of `piem-am-create-worktree'. With the default value,