t4013: add "diff" UI program tests.

diff --git a/t/t1001-read-tree-m-2way.sh b/t/t1001-read-tree-m-2way.sh
index 309baa5ae2867c31a7d396d63b6e6eb5cac8b3e2..75e4c9a88657e4ea28e0b4dfb7cbb2c3eaaa2f3f 100755 (executable)
--- a/t/t1001-read-tree-m-2way.sh
+++ b/t/t1001-read-tree-m-2way.sh
@@ -11,7 +11,7 @@ There is the head (called H) and another commit (called M), which is
 simply ahead of H.  The index and the work tree contains a state that
 is derived from H, but may also have local changes.  This test checks
 all the combinations described in the two-tree merge "carry forward"
-rules, found in <Documentation/git-rev-tree.txt>.
+rules, found in <Documentation/git-read-tree.txt>.
 
 In the test, these paths are used:
         bozbar  - in H, stays in M, modified from bozbar to gnusto
@@ -29,7 +29,6 @@ read_tree_twoway () {
 _x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
 _x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
 compare_change () {
-       cat current
        sed -n >current \
            -e '/^--- /d; /^+++ /d; /^@@ /d;' \
            -e 's/^\([-+][0-7][0-7][0-7][0-7][0-7][0-7]\) '"$_x40"' /\1 X /p' \
@@ -38,7 +37,7 @@ compare_change () {
 }
 
 check_cache_at () {
-       clean_if_empty=`git-diff-files "$1"`
+       clean_if_empty=`git-diff-files -- "$1"`
        case "$clean_if_empty" in
        '')  echo "$1: clean" ;;
        ?*)  echo "$1: dirty" ;;
@@ -51,20 +50,31 @@ check_cache_at () {
        esac
 }
 
+cat >bozbar-old <<\EOF
+This is a sample file used in two-way fast forward merge
+tests.  Its second line ends with a magic word bozbar
+which will be modified by the merged head to gnusto.
+It has some extra lines so that external tools can
+successfully merge independent changes made to later
+lines (such as this one), avoiding line conflicts.
+EOF
+
+sed -e 's/bozbar/gnusto (earlier bozbar)/' bozbar-old >bozbar-new
+
 test_expect_success \
     setup \
     'echo frotz >frotz &&
      echo nitfol >nitfol &&
-     echo bozbar >bozbar &&
+     cat bozbar-old >bozbar &&
      echo rezrov >rezrov &&
      echo yomin >yomin &&
-     git-update-cache --add nitfol bozbar rezrov &&
+     git-update-index --add nitfol bozbar rezrov &&
      treeH=`git-write-tree` &&
      echo treeH $treeH &&
      git-ls-tree $treeH &&
 
-     echo gnusto >bozbar &&
-     git-update-cache --add frotz bozbar --force-remove rezrov &&
+     cat bozbar-new >bozbar &&
+     git-update-index --add frotz bozbar --force-remove rezrov &&
      git-ls-files --stage >M.out &&
      treeM=`git-write-tree` &&
      echo treeM $treeM &&
@@ -86,9 +96,11 @@ echo '+100644 X 0    yomin' >expected
 test_expect_success \
     '4 - carry forward local addition.' \
     'rm -f .git/index &&
-     git-update-cache --add yomin &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
+     git-update-index --add yomin &&
      read_tree_twoway $treeH $treeM &&
-     git-ls-files --stage >4.out || exit
+     git-ls-files --stage >4.out || return 1
      diff -u M.out 4.out >4diff.out
      compare_change 4diff.out expected &&
      check_cache_at yomin clean'
@@ -96,11 +108,13 @@ test_expect_success \
 test_expect_success \
     '5 - carry forward local addition.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo yomin >yomin &&
-     git-update-cache --add yomin &&
+     git-update-index --add yomin &&
      echo yomin yomin >yomin &&
      read_tree_twoway $treeH $treeM &&
-     git-ls-files --stage >5.out || exit
+     git-ls-files --stage >5.out || return 1
      diff -u M.out 5.out >5diff.out
      compare_change 5diff.out expected &&
      check_cache_at yomin dirty'
@@ -108,7 +122,9 @@ test_expect_success \
 test_expect_success \
     '6 - local addition already has the same.' \
     'rm -f .git/index &&
-     git-update-cache --add frotz &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
+     git-update-index --add frotz &&
      read_tree_twoway $treeH $treeM &&
      git-ls-files --stage >6.out &&
      diff -u M.out 6.out &&
@@ -117,8 +133,10 @@ test_expect_success \
 test_expect_success \
     '7 - local addition already has the same.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo frotz >frotz &&
-     git-update-cache --add frotz &&
+     git-update-index --add frotz &&
      echo frotz frotz >frotz &&
      read_tree_twoway $treeH $treeM &&
      git-ls-files --stage >7.out &&
@@ -128,23 +146,29 @@ test_expect_success \
 test_expect_success \
     '8 - conflicting addition.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo frotz frotz >frotz &&
-     git-update-cache --add frotz &&
+     git-update-index --add frotz &&
      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 
 test_expect_success \
     '9 - conflicting addition.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo frotz frotz >frotz &&
-     git-update-cache --add frotz &&
+     git-update-index --add frotz &&
      echo frotz >frotz &&
      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 
 test_expect_success \
     '10 - path removed.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo rezrov >rezrov &&
-     git-update-cache --add rezrov &&
+     git-update-index --add rezrov &&
      read_tree_twoway $treeH $treeM &&
      git-ls-files --stage >10.out &&
      diff -u M.out 10.out'
@@ -152,23 +176,29 @@ test_expect_success \
 test_expect_success \
     '11 - dirty path removed.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo rezrov >rezrov &&
-     git-update-cache --add rezrov &&
+     git-update-index --add rezrov &&
      echo rezrov rezrov >rezrov &&
      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 
 test_expect_success \
     '12 - unmatching local changes being removed.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo rezrov rezrov >rezrov &&
-     git-update-cache --add rezrov &&
+     git-update-index --add rezrov &&
      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 
 test_expect_success \
     '13 - unmatching local changes being removed.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo rezrov rezrov >rezrov &&
-     git-update-cache --add rezrov &&
+     git-update-index --add rezrov &&
      echo rezrov >rezrov &&
      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 
@@ -180,10 +210,12 @@ EOF
 test_expect_success \
     '14 - unchanged in two heads.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo nitfol nitfol >nitfol &&
-     git-update-cache --add nitfol &&
+     git-update-index --add nitfol &&
      read_tree_twoway $treeH $treeM &&
-     git-ls-files --stage >14.out || exit
+     git-ls-files --stage >14.out || return 1
      diff -u M.out 14.out >14diff.out
      compare_change 14diff.out expected &&
      check_cache_at nitfol clean'
@@ -191,11 +223,13 @@ test_expect_success \
 test_expect_success \
     '15 - unchanged in two heads.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo nitfol nitfol >nitfol &&
-     git-update-cache --add nitfol &&
+     git-update-index --add nitfol &&
      echo nitfol nitfol nitfol >nitfol &&
      read_tree_twoway $treeH $treeM &&
-     git-ls-files --stage >15.out || exit
+     git-ls-files --stage >15.out || return 1
      diff -u M.out 15.out >15diff.out
      compare_change 15diff.out expected &&
      check_cache_at nitfol dirty'
@@ -203,23 +237,29 @@ test_expect_success \
 test_expect_success \
     '16 - conflicting local change.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo bozbar bozbar >bozbar &&
-     git-update-cache --add bozbar &&
+     git-update-index --add bozbar &&
      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 
 test_expect_success \
     '17 - conflicting local change.' \
     'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
      echo bozbar bozbar >bozbar &&
-     git-update-cache --add bozbar &&
+     git-update-index --add bozbar &&
      echo bozbar bozbar bozbar >bozbar &&
      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 
 test_expect_success \
     '18 - local change already having a good result.' \
     'rm -f .git/index &&
-     echo gnusto >bozbar &&
-     git-update-cache --add bozbar &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
+     cat bozbar-new >bozbar &&
+     git-update-index --add bozbar &&
      read_tree_twoway $treeH $treeM &&
      git-ls-files --stage >18.out &&
      diff -u M.out 18.out &&
@@ -228,8 +268,10 @@ test_expect_success \
 test_expect_success \
     '19 - local change already having a good result, further modified.' \
     'rm -f .git/index &&
-     echo gnusto >bozbar &&
-     git-update-cache --add bozbar &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
+     cat bozbar-new >bozbar &&
+     git-update-index --add bozbar &&
      echo gnusto gnusto >bozbar &&
      read_tree_twoway $treeH $treeM &&
      git-ls-files --stage >19.out &&
@@ -239,8 +281,10 @@ test_expect_success \
 test_expect_success \
     '20 - no local change, use new tree.' \
     'rm -f .git/index &&
-     echo bozbar >bozbar &&
-     git-update-cache --add bozbar &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
+     cat bozbar-old >bozbar &&
+     git-update-index --add bozbar &&
      read_tree_twoway $treeH $treeM &&
      git-ls-files --stage >20.out &&
      diff -u M.out 20.out &&
@@ -249,17 +293,29 @@ test_expect_success \
 test_expect_success \
     '21 - no local change, dirty cache.' \
     'rm -f .git/index &&
-     echo bozbar >bozbar &&
-     git-update-cache --add bozbar &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
+     cat bozbar-old >bozbar &&
+     git-update-index --add bozbar &&
      echo gnusto gnusto >bozbar &&
      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 
+# This fails with straight two-way fast forward.
+test_expect_success \
+    '22 - local change cache updated.' \
+    'rm -f .git/index &&
+     git-read-tree $treeH &&
+     git-checkout-index -u -f -q -a &&
+     sed -e "s/such as/SUCH AS/" bozbar-old >bozbar &&
+     git-update-index --add bozbar &&
+     if read_tree_twoway $treeH $treeM; then false; else :; fi'
+
 # Also make sure we did not break DF vs DF/DF case.
 test_expect_success \
     'DF vs DF/DF case setup.' \
     'rm -f .git/index &&
      echo DF >DF &&
-     git-update-cache --add DF &&
+     git-update-index --add DF &&
      treeDF=`git-write-tree` &&
      echo treeDF $treeDF &&
      git-ls-tree $treeDF &&
@@ -267,7 +323,7 @@ test_expect_success \
      rm -f DF &&
      mkdir DF &&
      echo DF/DF >DF/DF &&
-     git-update-cache --add --remove DF DF/DF &&
+     git-update-index --add --remove DF DF/DF &&
      treeDFDF=`git-write-tree` &&
      echo treeDFDF $treeDFDF &&
      git-ls-tree $treeDFDF &&
@@ -278,7 +334,7 @@ test_expect_success \
     'rm -f .git/index &&
      rm -fr DF &&
      echo DF >DF &&
-     git-update-cache --add DF &&
+     git-update-index --add DF &&
      read_tree_twoway $treeDF $treeDFDF &&
      git-ls-files --stage >DFDFcheck.out &&
      diff -u DFDF.out DFDFcheck.out &&