add comments

IkiWiki/Rcs/Stub.pm

@@ -8,26 +8,50 @@ use IkiWiki;
 package IkiWiki;
 
 sub rcs_update () {
+	# Update working directory to current version.
+	# (May be more complex for distributed RCS.)
 }
 
 sub rcs_prepedit ($) {
+	# Prepares to edit a file under revision control. Returns a token
+	# that must be passed into rcs_commit when the file is ready
+	# for committing.
+	# The file is relative to the srcdir.
 	return ""
 }
 
 sub rcs_commit ($$$) {
+	# Tries to commit the page; returns undef on _success_ and
+	# a version of the page with the rcs's conflict markers on failure.
+	# The file is relative to the srcdir.
 	return undef # success
 }
 
 sub rcs_add ($) {
+	# Add a file. The filename is relative to the root of the srcdir.
 }
 
 sub rcs_recentchanges ($) {
+	# Examine the RCS history and generate a data structure for
+	# the recentchanges page.
+	# This structure is a list of items, each item is a hash reference
+	# representing one change to the repo.
+	# The hash has keys user (a link to the user making the change),
+	# committype (web or the name of the rcs), when (when the change
+	# happened, relative to the current time), message (a reference
+	# to an array of lines for the commit message), and pages (a
+	# reference to an array of links to the pages that were changed).
 }
 
 sub rcs_notify () {
+	# This function is called when a change is committed to the wiki,
+	# and ikiwiki is running as a post-commit hook from the RCS.
+	# It should examine the repository to somehow determine what pages
+	# changed, and then send emails to users subscribed to those pages.
 }
 
 sub rcs_getctime ($) {
+	# Optional, used to get the page creation time from the RCS.
 	error "getctime not implemented";
 }