Make manifest mode with --force option cause existing digests to be replaced

for any files that exist in ${DISTDIR}. This provides an alternative to
ebuild --force manifest for updating existing distfiles digests. Digests
are assumed to be corect for files that do not exist in ${DISTDIR} since
the user could simply remove the whole Manifest if they wanted to regenerate
digests for all files (and it's safer to regenerate as few as possible
because it's less probably that a valid digest will get replaced by an
invalid one). (trunk r12802)

svn path=/main/branches/2.1.6/; revision=13036

2 files changed, 49 insertions, 1 deletions

diff --git a/bin/repoman b/bin/repoman
index 7bb507d98..ad5c51f83 100755
--- a/bin/repoman
+++ b/bin/repoman
@@ -799,11 +799,50 @@ for x in scanlist:
 
 	if options.mode == "manifest" or \
 	  options.mode in ('commit', 'fix') and not options.pretend:
+		auto_assumed = set()
+		fetchlist_dict = portage.FetchlistDict(checkdir,
+			repoman_settings, portdb)
+		if options.mode == 'manifest' and options.force:
+			portage._doebuild_manifest_exempt_depend += 1
+			try:
+				distdir = repoman_settings['DISTDIR']
+				mf = portage.manifest.Manifest(checkdir, distdir,
+					fetchlist_dict=fetchlist_dict)
+				mf.create(requiredDistfiles=None,
+					assumeDistHashesAlways=True)
+				for distfiles in fetchlist_dict.itervalues():
+					for distfile in distfiles:
+						if os.path.isfile(os.path.join(distdir, distfile)):
+							mf.fhashdict['DIST'].pop(distfile, None)
+						else:
+							auto_assumed.add(distfile)
+				mf.write()
+			finally:
+				portage._doebuild_manifest_exempt_depend -= 1
+
 		repoman_settings["O"] = checkdir
 		if not portage.digestgen([], repoman_settings, myportdb=portdb):
 			print "Unable to generate manifest."
 			dofail = 1
 		if options.mode == "manifest":
+			if not dofail and options.force and auto_assumed and \
+				'assume-digests' in repoman_settings.features:
+				# Show which digests were assumed despite the --force option
+				# being given. This output will already have been shown by
+				# digestgen() if assume-digests is not enabled, so only show
+				# it here if assume-digests is enabled.
+				pkgs = list(fetchlist_dict)
+				pkgs.sort()
+				portage.writemsg_stdout("  digest.assumed" + \
+					portage.output.colorize("WARN",
+					str(len(auto_assumed)).rjust(18)) + "\n")
+				for cpv in pkgs:
+					fetchmap = fetchlist_dict[cpv]
+					pf = portage.catsplit(cpv)[1]
+					for distfile in sorted(fetchmap):
+						if distfile in auto_assumed:
+							portage.writemsg_stdout(
+								"   %s::%s\n" % (pf, distfile))
 			continue
 		elif dofail:
 			sys.exit(1)
diff --git a/man/repoman.1 b/man/repoman.1
index df9d6b07f..cca390aaf 100644
--- a/man/repoman.1
+++ b/man/repoman.1
@@ -18,6 +18,14 @@ Force commit to proceed, regardless of QA issues. For convenience, this option
 causes the most time consuming QA checks to be skipped. The commit message will
 include an indication that this option has been enabled, together with the
 usual portage version stamp.
+
+When used together with \fBmanifest\fR mode, \fB--force\fR causes existing
+digests to be replaced for any files that exist in ${DISTDIR}.
+Existing digests are assumed to be correct for files that would otherwise
+have to be downloaded in order to recompute digests. \fBWARNING:\fR When
+replacing existing digests, it is the user's responsibility to ensure that
+files contained in ${DISTDIR} have the correct identities. Especially beware
+of partially downloaded files.
 .TP
 \fB-q\fR, \fB--quiet\fR
 Be less verbose about extraneous info
@@ -69,7 +77,8 @@ Scan directory tree for QA issues (short listing)
 Fix simple QA issues (stray digests, missing digests)
 .TP
 .B manifest
-Generate a Manifest (fetches files if necessary)
+Generate a Manifest (fetches distfiles if necessary). See the \fB\-\-force\fR
+option if you would like to replace existing distfiles digests.
 .TP
 .B commit
 Scan directory tree for QA issues; if OK, commit via cvs