status: show in-progress info for porcelain v2

Porcelain v2 format is intended to be extendable. So we add in-progress
information unconditionally to the branch information (in case that is
shown at all).

Note that - in contrast to the short status info - we add all available
information in case multiple operations are in progress, and we do so by
outputting one line per operation.

Author: mjg

t/t7064-wtstatus-pv2.sh

@@ -295,6 +295,7 @@ test_expect_success 'verify AA (add-add) conflict' '
 	cat >expect <<-EOF &&
 	# branch.oid $HM
 	# branch.head AA_M
+	# branch.inprogress MERGING
 	u AA N... 000000 100644 100644 100644 $ZERO_OID $OID_AA_B $OID_AA_A conflict.txt
 	EOF
 
@@ -335,6 +336,7 @@ test_expect_success 'verify UU (edit-edit) conflict' '
 	cat >expect <<-EOF &&
 	# branch.oid $HM
 	# branch.head UU_M
+	# branch.inprogress MERGING
 	u UU N... 100644 100644 100644 100644 $OID_UU_ANC $OID_UU_B $OID_UU_A conflict.txt
 	EOF
 

t/t7512-status-help.sh

@@ -99,7 +99,9 @@ EOF
 UU main.txt
 EOF
 	git status --untracked-files=no --short --branch --in-progress >actual &&
-	test_cmp expected actual
+	test_cmp expected actual &&
+	git status --untracked-files=no --porcelain=v2 --branch >actual &&
+	test_grep "^# branch.inprogress REBASE-m$" actual
 '
 
 
@@ -166,7 +168,9 @@ EOF
 UU main.txt
 EOF
 	git status --untracked-files=no --short --branch --in-progress >actual &&
-	test_cmp expected actual
+	test_cmp expected actual &&
+	git status --untracked-files=no --porcelain=v2 --branch >actual &&
+	test_grep "^# branch.inprogress REBASE-i$" actual
 '
 
 
@@ -636,7 +640,9 @@ EOF
 ## am_already_exists; AM
 EOF
 	git status --untracked-files=no --short --branch --in-progress >actual &&
-	test_cmp expected actual
+	test_cmp expected actual &&
+	git status --untracked-files=no --porcelain=v2 --branch >actual &&
+	test_grep "^# branch.inprogress AM$" actual
 '
 
 
@@ -710,7 +716,9 @@ EOF
 ## HEAD (no branch); BISECTING
 EOF
 	git status --untracked-files=no --short --branch --in-progress >actual &&
-	test_cmp expected actual
+	test_cmp expected actual &&
+	git status --untracked-files=no --porcelain=v2 --branch >actual &&
+	test_grep "^# branch.inprogress BISECTING$" actual
 '
 
 
@@ -803,7 +811,9 @@ EOF
 UU main.txt
 EOF
 	git status --untracked-files=no --short --branch --in-progress >actual &&
-	test_cmp expected actual
+	test_cmp expected actual &&
+	git status --untracked-files=no --porcelain=v2 --branch >actual &&
+	test_grep "^# branch.inprogress CHERRY-PICKING$" actual
 '
 
 
@@ -937,7 +947,9 @@ EOF
 UU to-revert.txt
 EOF
 	git status --untracked-files=no --short --branch --in-progress >actual &&
-	test_cmp expected actual
+	test_cmp expected actual &&
+	git status --untracked-files=no --porcelain=v2 --branch >actual &&
+	test_grep "^# branch.inprogress REVERTING$" actual
 '
 
 

wt-status.c

@@ -2302,6 +2302,20 @@ static void wt_porcelain_v2_print_tracking(struct wt_status *s)
 			}
 		}
 	}
+	if (s->state.merge_in_progress)
+		fprintf(s->fp, "# branch.inprogress %s%c", "MERGING", eol);
+	if (s->state.am_in_progress)
+		fprintf(s->fp, "# branch.inprogress %s%c", "AM", eol);
+	if (s->state.rebase_in_progress)
+		fprintf(s->fp, "# branch.inprogress %s%c", "REBASE-m", eol);
+	if (s->state.rebase_interactive_in_progress)
+		fprintf(s->fp, "# branch.inprogress %s%c", "REBASE-i", eol);
+	if (s->state.cherry_pick_in_progress)
+		fprintf(s->fp, "# branch.inprogress %s%c", "CHERRY-PICKING", eol);
+	if (s->state.revert_in_progress)
+		fprintf(s->fp, "# branch.inprogress %s%c", "REVERTING", eol);
+	if (s->state.bisect_in_progress)
+		fprintf(s->fp, "# branch.inprogress %s%c", "BISECTING", eol);
 }
 
 /*