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#!/bin/sh
# Test interdiff with /dev/null automatic -p detection
# This tests that interdiff can auto-detect -p values when dealing with /dev/null
. ${top_srcdir-.}/tests/common.sh
# Create first patch (creates a file with initial content)
cat << EOF > patch1
--- /dev/null
+++ b/newfile.txt
@@ -0,0 +1,3 @@
+line one
+line two
+line three
EOF
# Create second patch (creates the same file with different content)
cat << EOF > patch2
--- /dev/null
+++ a/newfile.txt
@@ -0,0 +1,4 @@
+line one
+inserted line
+line two
+line three
EOF
# Expected interdiff output (should auto-detect -p1)
# This shows what needs to change to go from patch1's result to patch2's result
cat << EOF > expected
diff -u b/newfile.txt a/newfile.txt
--- b/newfile.txt
+++ a/newfile.txt
@@ -1,3 +1,4 @@
line one
+inserted line
line two
line three
EOF
# Run interdiff
${INTERDIFF} patch1 patch2 2>errors >actual || exit 1
[ -s errors ] && exit 1
# Compare the actual output with expected
diff -u expected actual || exit 1
exit 0
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