convert: add a mode where mercurial_sink skips empty revisions. The getchanges function of some converter_source classes can return some false positives. I.e. they sometimes claim that a file "foo" was changed in some revision, even though its contents are still the same. convert_svn is particularly bad, but I think this can also happen with convert_cvs and, at least in theory, with mercurial_source. For regular conversions this is not really a problem - as long as getfile returns the right contents, we'll get a converted revision with the right contents. But when we use --filemap, this could lead to superfluous revisions being converted. Instead of fixing every converter_source, I decided to change mercurial_sink to work around this problem. When --filemap is used, we're interested only in revisions that touch some specific files. If a revision doesn't change any of these files, then we're not interested in it (at least for revisions with a single parent; merges are special). For mercurial_sink, we abuse this property and rollback a commit if the manifest text hasn't changed. This avoids duplicating the logic from localrepo.filecommit to detect unchanged files.

     1

header = header.tmpl

     2

footer = ''

     3

changeset = changeset.tmpl

     4

difflineplus = '#line#'

     5

difflineminus = '#line#'

     6

difflineat = '#line#'

     7

diffline = '#line#'

     8

changesetparent = '# Parent #node#'

     9

changesetchild = '# Child #node#'

    10

filenodelink = ''

    11

filerevision = '#rawfileheader##raw#'

    12

fileline = '#line#'

    13

diffblock = '#lines#'

    14

filediff = filediff.tmpl

    15

fileannotate = fileannotate.tmpl

    16

annotateline = '#author#@#rev#: #line#'

    17

manifest = manifest.tmpl

    18

manifestdirentry = 'drwxr-xr-x {basename}\n'

    19

manifestfileentry = '{permissions|permissions} {size} {basename}\n'

    20

index = index.tmpl

    21

indexentry = '#url#\n'