[PATCH] rev-list: Document --skip and add test cases.

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Signed-off-by: Robert Fitzsimons <robfitz@xxxxxxxx>
---

> I am having a hard time convincing myself that this is a feature
> that is a narrow special case for rev-list and does not belong
> to the generic revision traversal machinery.

Your implementation is much better then mine.  Here's some documentation
and a set of test cases.

Robert


 Documentation/git-rev-list.txt |    5 ++++
 t/t6005-rev-list-count.sh      |   51 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+), 0 deletions(-)

diff --git a/Documentation/git-rev-list.txt b/Documentation/git-rev-list.txt
index ec43c0b..9e0dcf8 100644
--- a/Documentation/git-rev-list.txt
+++ b/Documentation/git-rev-list.txt
@@ -10,6 +10,7 @@ SYNOPSIS
 --------
 [verse]
 'git-rev-list' [ \--max-count=number ]
+	     [ \--skip=number ]
 	     [ \--max-age=timestamp ]
 	     [ \--min-age=timestamp ]
 	     [ \--sparse ]
@@ -139,6 +140,10 @@ limiting may be applied.
 
 	Limit the number of commits output.
 
+--skip='number'::
+
+	Skip 'number' commits before starting to show the commit output.
+
 --since='date', --after='date'::
 
 	Show commits more recent than a specific date.
diff --git a/t/t6005-rev-list-count.sh b/t/t6005-rev-list-count.sh
new file mode 100755
index 0000000..334fccf
--- /dev/null
+++ b/t/t6005-rev-list-count.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+
+test_description='git-rev-list --max-count and --skip test'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+    for n in 1 2 3 4 5 ; do \
+        echo $n > a ; \
+        git add a ; \
+        git commit -m "$n" ; \
+    done
+'
+
+test_expect_success 'no options' '
+    test $(git-rev-list HEAD | wc -l) = 5
+'
+
+test_expect_success '--max-count' '
+    test $(git-rev-list HEAD --max-count=0 | wc -l) = 0 &&
+    test $(git-rev-list HEAD --max-count=3 | wc -l) = 3 &&
+    test $(git-rev-list HEAD --max-count=5 | wc -l) = 5 &&
+    test $(git-rev-list HEAD --max-count=10 | wc -l) = 5
+'
+
+test_expect_success '--max-count all forms' '
+    test $(git-rev-list HEAD --max-count=1 | wc -l) = 1 &&
+    test $(git-rev-list HEAD -1 | wc -l) = 1 &&
+    test $(git-rev-list HEAD -n1 | wc -l) = 1 &&
+    test $(git-rev-list HEAD -n 1 | wc -l) = 1
+'
+
+test_expect_success '--skip' '
+    test $(git-rev-list HEAD --skip=0 | wc -l) = 5 &&
+    test $(git-rev-list HEAD --skip=3 | wc -l) = 2 &&
+    test $(git-rev-list HEAD --skip=5 | wc -l) = 0 &&
+    test $(git-rev-list HEAD --skip=10 | wc -l) = 0
+'
+
+test_expect_success '--skip --max-count' '
+    test $(git-rev-list HEAD --skip=0 --max-count=0 | wc -l) = 0 &&
+    test $(git-rev-list HEAD --skip=0 --max-count=10 | wc -l) = 5 &&
+    test $(git-rev-list HEAD --skip=3 --max-count=0 | wc -l) = 0 &&
+    test $(git-rev-list HEAD --skip=3 --max-count=1 | wc -l) = 1 &&
+    test $(git-rev-list HEAD --skip=3 --max-count=2 | wc -l) = 2 &&
+    test $(git-rev-list HEAD --skip=3 --max-count=10 | wc -l) = 2 &&
+    test $(git-rev-list HEAD --skip=5 --max-count=10 | wc -l) = 0 &&
+    test $(git-rev-list HEAD --skip=10 --max-count=10 | wc -l) = 0
+'
+
+test_done
-- 
1.4.4.2.g80fef-dirty

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