Add Makefile and fix problems it found

Makefile

@@ -0,0 +1,46 @@
+EMACS ?= emacs
+
+# The order is important for compilation.
+for_compile := *.el
+for_checkdoc := *.el
+for_longlines := $(wildcard *.el *.md *.yml) Makefile
+
+.PHONY: all
+all: compile checkdoc longlines
+
+.PHONY: compile
+compile:
+	@for file in $(for_compile); do \
+	    echo "[compile] $$file" ;\
+	    $(EMACS) -Q --batch -L . -f batch-byte-compile $$file 2>&1 \
+	        | grep -v "^Wrote" \
+	        | grep . && exit 1 || true ;\
+	done
+
+.PHONY: checkdoc
+checkdoc:
+	@for file in $(for_checkdoc); do \
+	    echo "[checkdoc] $$file" ;\
+	    $(EMACS) -Q --batch \
+	        --eval "(or (fboundp 'checkdoc-file) (kill-emacs))" \
+	        --eval "(setq sentence-end-double-space nil)" \
+	        --eval "(checkdoc-file \"$$file\")" 2>&1 \
+	        | grep . && exit 1 || true ;\
+	done
+
+.PHONY: longlines
+longlines:
+	@echo "[longlines] $(for_longlines)"
+	@for file in $(for_longlines); do \
+	    cat "$$file" \
+	        | sed '/[l]onglines-start/,/longlines-stop/d' \
+	        | grep -E '.{80}' \
+	        | grep -E -v 'https?://' \
+	        | sed "s/^/$$file:long line: /" \
+	        | grep . && exit 1 || true ;\
+	done
+
+.PHONY: clean
+clean:
+	@echo "[clean]" *.elc
+	@rm -f *.elc

apheleia.el

@@ -23,6 +23,7 @@
 ;;; Code:
 
 (require 'cl-lib)
+(require 'map)
 (require 'subr-x)
 
 (defgroup apheleia nil
@@ -130,7 +131,8 @@ contains the patch."
       (push (cons nil (point)) point-list)
       (dolist (w (get-buffer-window-list nil nil t))
         (push (cons w (window-point w)) point-list)
-        (push (cons w (count-lines (window-start w) (point))) window-line-list)))
+        (push (cons w (count-lines (window-start w) (point)))
+              window-line-list)))
     (with-current-buffer patch-buffer
       (apheleia--map-rcs-patch
        (lambda (command)
@@ -291,7 +293,8 @@ provided that its exit status is 0."
       (error (message "Failed to run %s: %s" name (error-message-string e))))))
 
 (defun apheleia--write-region-silently
-    (start end filename &optional append visit lockname mustbenew write-region)
+    (start end filename &optional
+           append _visit lockname mustbenew write-region)
   "Like `write-region', but silent.
 START, END, FILENAME, APPEND, VISIT, LOCKNAME, and MUSTBENEW are
 as in `write-region'. WRITE-REGION is used instead of the actual
@@ -303,11 +306,11 @@ as in `write-region'. WRITE-REGION is used instead of the actual
 
 (defun apheleia--write-file-silently (&optional filename)
   "Write contents of current buffer into file FILENAME, silently.
-FILENAME defaults to `buffer-file-name'."
+FILENAME defaults to value of variable `buffer-file-name'."
   (cl-letf* ((write-region (symbol-function #'write-region))
              ((symbol-function #'write-region)
               (lambda (start end filename &optional
-                             append visit lockname mustbenew)
+                             append _visit lockname mustbenew)
                 (apheleia--write-region-silently
                  start end filename append 0 lockname mustbenew write-region)))
              (message (symbol-function #'message))
@@ -430,15 +433,18 @@ commands, lists of strings and symbols, in the format of
 This determines what formatter to use in buffers without a
 setting for `apheleia-formatter'. The keys are major mode
 symbols (matched against `major-mode' with `derived-mode-p') or
-strings (matched against `buffer-file-name' with
-`string-match-p'), and the values are symbols with entries in
-`apheleia-formatters' (or equivalently, they are allowed values
-for `apheleia-formatter'). Earlier entries take precedence over
-later ones.
+strings (matched against value of variable `buffer-file-name'
+with `string-match-p'), and the values are symbols with entries
+in `apheleia-formatters' (or equivalently, they are allowed
+values for `apheleia-formatter'). Earlier entries take precedence
+over later ones.
 
 Be careful when writing regexps to include \"\\'\" and to escape
 \"\\.\" in order to properly match a file extension. For example,
-to match \".jsx\" files you might use \"\\.jsx\\'\".")
+to match \".jsx\" files you might use \"\\.jsx\\'\"."
+  :type '(alist
+          :key-type symbol
+          :value-type symbol))
 
 (defvar-local apheleia-formatter nil
   "Name of formatter to use in current buffer, a symbol or nil.