Replace SC_VCS=git-svn with SC_WANT_CHANGELOG.

Now ChangeLog creation is controlled directly by a dedicated variable.
It is disabled by default, and enabled implicitly with cvs, svn and
git-svn. It can be enabled explicitly via `-c' too.

SC_VCS no longer will contain git-svn -- it will be simply git. That
simplifies a lot of checks in the code.

sunrise-commit.1.in

@@ -35,9 +35,9 @@ repository (due to limitations of non-distributed VCSes).
 
 .IP "\fB-c\fP, \fB--changelog\fP"
 
-Ignored (provided for backwards compatibility). ChangeLog entries are
-now created as needed. Use \fB--trivial\fP to suppress creation of
-ChangeLog entries.
+Force creating a ChangeLog even if DVCS is used. Otherwise, ChangeLog
+entries will be created if needed. Use \fB--trivial\fP to suppress
+creation of ChangeLog entries.
 
 Because of the nature of DVCSes, a ChangeLog will not be created for a
 new ebuild in a GIT or Mercurial repository. However, if the ebuild

sunrise-commit.in

@@ -52,6 +52,8 @@ local_supported || eval 'local() {
 
 # See if we're in a repo, and what VCS are we using.
 find_repo() {
+	: ${SC_WANT_CHANGELOG=}
+
 	if svn info >/dev/null 2>&1; then
 		SC_VCS=svn
 	elif hg tip >/dev/null 2>&1; then
@@ -65,10 +67,9 @@ find_repo() {
 
 		if [ ${ret} -ne 127 ] && [ ${ret} -ne 128 ]; then
 			if echo "${remotes}" | grep git-svn >/dev/null 2>&1; then
-				SC_VCS=git-svn
-			else
-				SC_VCS=git
+				SC_WANT_CHANGELOG=1
 			fi
+			SC_VCS=git-svn
 		else
 			die 'Unable to find any familiar repository type (are you inside the repo?).'
 		fi
@@ -82,7 +83,7 @@ find_repo() {
 is_whole_dir_removed() {
 	if [ ${SC_VCS} = svn ]; then
 		[ "$(svn status --depth=empty -- "${1}" | wc -l)" = 1 ]
-	elif [ ${SC_VCS%-svn} = git ]; then
+	elif [ ${SC_VCS} = git ]; then
 		[ -z "$(git ls-files -c -- "${1}")" ]
 	elif [ ${SC_VCS} = hg ]; then
 		[ -z "$(hg status -madc "${1}")" ]
@@ -96,7 +97,7 @@ is_package_removal() {
 	local fields list
 	[ -d profiles ] && fields=1-2 || fields=1
 
-	if [ ${SC_VCS%-svn} = git ]; then
+	if [ ${SC_VCS} = git ]; then
 		list=$(git diff-index --relative --name-only --diff-filter=D HEAD)
 	elif [ ${SC_VCS} = hg ]; then
 		list=$(hg status -nr .)
@@ -189,7 +190,7 @@ find_ebuilds() {
 check_for_changes() {
 	local output
 
-	if [ ${SC_VCS%-svn} = git ]; then
+	if [ ${SC_VCS} = git ]; then
 		output=$(git diff-index --name-only --relative HEAD -- "${@}")
 	elif [ ${SC_VCS} = hg ]; then
 		output=$(hg status -- ${1-.} "${@}")
@@ -207,7 +208,7 @@ check_for_changes() {
 
 # Discard any changes to a particular set of files.
 vcs_reset() {
-	if [ ${SC_VCS%-svn} = git ]; then
+	if [ ${SC_VCS} = git ]; then
 		git checkout HEAD -- "${@}" 2>/dev/null || req rm -f -- "${@}"
 	elif [ ${SC_VCS} = hg ]; then
 		[ -n "$(hg status -au "${@}")" ] && req rm -f -- "${@}"
@@ -225,7 +226,7 @@ vcs_reset() {
 
 # Request VCS to provide a verbose status report.
 vcs_status() {
-	if [ ${SC_VCS%-svn} = git ]; then
+	if [ ${SC_VCS} = git ]; then
 		git status -s -- ${1-.} "${@}"
 	elif [ ${SC_VCS} = hg ]; then
 		hg status -- ${1-.}  "${@}"
@@ -238,7 +239,7 @@ vcs_status() {
 
 # Add particular files to the repository.
 vcs_add() {
-	${SC_VCS%-svn} add -- "${@}"
+	${SC_VCS} add -- "${@}"
 }
 
 # Commit the specified objects using the commit message provided
@@ -248,7 +249,7 @@ vcs_commit() {
 	msg=${1}
 	shift
 
-	if [ ${SC_VCS%-svn} = git ]; then
+	if [ ${SC_VCS} = git ]; then
 		exec git commit -m "${msg}" ${1+-o} -- "${@}"
 	elif [ ${SC_VCS} = hg ]; then
 		exec hg commit -m "${msg}" -- ${1-.} "${@}"
@@ -332,7 +333,7 @@ main() {
 				;;
 
 			-c|--changelog)
-				# Now changelog entries are implicit -- backwards compat.
+				SC_WANT_CHANGELOG=1
 				;;
 			-C|--nocolor)
 				monochrome=1
@@ -408,7 +409,7 @@ main() {
 
 			# With DVCS repos, we do not do ChangeLogs by default...
 			# ...at least unless they're already there.
-			if [ ${SC_VCS#git-} = svn ] || [ ${SC_VCS} = cvs ] || [ -f ChangeLog ]; then
+			if [ -n "${SC_WANT_CHANGELOG}" ] || [ -f ChangeLog ]; then
 				sayv 'Cleaning up the ChangeLog...'
 				vcs_reset ChangeLog