view contrib/plan9/9diff @ 23276:4be754832829

largefiles: move "copyalltostore" invocation into "markcommitted"

Before this patch, while "hg convert", largefiles avoids copying
largefiles in the working directory into the store area by combination
of setting "repo._isconverting" in "mercurialsink{before|after}" and
checking it in "copytostoreabsolute".

This avoiding is needed while "hg convert", because converting doesn't
update largefiles in the working directory.

But this implementation is not efficient, because:

  - invocation in "markcommitted" can easily ensure updating
    largefiles in the working directory

    "markcommitted" is invoked only when new revision is committed via
    "commit" of "localrepository" (= with files in the working
    directory). On the other hand, "commitctx" may be invoked directly
    for in-memory committing.

  - committing without updating the working directory (e.g. "import
    --bypass") also needs this kind of avoiding

For efficiency of this kind of avoiding, this patch does:

  - move "copyalltostore" invocation into "markcommitted"
  - remove meaningless procedures below:
    - hooking "mercurialsink{before|after}" to (un)set "repo._isconverting"
    - checking "repo._isconverting" in "copytostoreabsolute"

This patch invokes "copyalltostore" also in "_commitcontext", because
"_commitcontext" expects that largefiles in the working directory are
copied into store area after "commitctx". In this case, the working
directory is used as a kind of temporary area to write largefiles out,
even though converted revisions are committed via "commitctx" (without
updating normal files).

#!/bin/rc
# 9diff - Mercurial extdiff wrapper for diff(1)

rfork e

fn getfiles {
	cd $1 &&
	for(f in `{du -as | awk '{print $2}'})
		test -f $f && echo `{cleanname $f}
}

fn usage {
	echo >[1=2] usage: 9diff [diff options] parent child root
	exit usage
}

opts=()
while(~ $1 -*){
	opts=($opts $1)
	shift
}
if(! ~ $#* 3)
	usage

# extdiff will set the parent and child to a single file if there is
# only one change. If there are multiple changes, directories will be
# set. diff(1) does not cope particularly with directories; instead we
# do the recursion ourselves and diff each file individually.
if(test -f $1)
	diff $opts $1 $2
if not{
	# extdiff will create a snapshot of the working copy to prevent
	# conflicts during the diff. We circumvent this behavior by
	# diffing against the repository root to produce plumbable
	# output. This is antisocial.
	for(f in `{sort -u <{getfiles $1} <{getfiles $2}}){
		file1=$1/$f; test -f $file1 || file1=/dev/null
		file2=$3/$f; test -f $file2 || file2=/dev/null
		diff $opts $file1 $file2
	}
}
exit ''