Add justfile and integration tests

.gitignore

@@ -1 +1,2 @@
 /target
+dist/

justfile

@@ -0,0 +1,15 @@
+dist: target-release-skip
+	if test ! -d dist ; then mkdir dist ; fi
+	cp target/release/skip dist/
+
+inttest: target-debug-skip
+	./test.sh
+
+target-release-skip: unittest inttest
+	cargo build --release
+
+target-debug-skip:
+	cargo build
+
+unittest: target-debug-skip
+	cargo test

test.sh

@@ -0,0 +1,131 @@
+#!/usr/bin/env bash
+
+set -e
+
+SKIP="./target/debug/skip"
+DIFF="diff -u --color"
+
+if test ! -x $SKIP ; then
+    echo "File missing: $SKIP - try 'zig build'"
+    exit 1
+fi
+
+echo "> skip a line when reading from stdin"
+INPUT=$(cat<<EOF
+line 1
+line 2
+EOF
+)
+echo "line 2" > test.expect
+echo "$INPUT" | $SKIP 1 > test.out
+$DIFF test.expect test.out
+rm test.expect test.out
+
+echo "> skip a line when reading from a file"
+cat<<EOF > test.in
+line 1
+line 2
+EOF
+echo "line 2" > test.expect
+$SKIP 1 test.in > test.out
+$DIFF test.expect test.out
+rm test.expect test.out
+
+echo "> skip until 2 matching lines seen"
+cat<<EOF > test.in
+alpha
+beta
+alpha
+alpha
+gamma
+alpha
+EOF
+cat<<EOF > test.expect
+alpha
+gamma
+alpha
+EOF
+$SKIP 2 test.in --line alpha > test.out
+$DIFF test.expect test.out
+rm test.in test.expect test.out
+
+echo "> skip lines until 2 tokens seen"
+cat<<EOF > test.in
+Lorem ipsum dolor sit amet, 
+consectetur adipiscing elit, 
+sed do eiusmod tempor incididunt 
+ut labore et dolore magna aliqua. 
+Ut enim ad minim veniam, 
+quis nostrud exercitation ullamco 
+laboris nisi ut aliquip ex ea 
+commodo consequat. 
+EOF
+cat<<EOF > test.expect
+Ut enim ad minim veniam, 
+quis nostrud exercitation ullamco 
+laboris nisi ut aliquip ex ea 
+commodo consequat. 
+EOF
+$SKIP 2 test.in --token dolor > test.out
+$DIFF test.expect test.out
+rm test.in test.expect test.out
+
+echo "> handle unknown parameter with simple error message"
+cat<<EOF > test.expect.err
+error: unexpected argument '--foo' found
+
+  note: to pass '--foo' as a value, use '-- --foo'
+
+Usage: skip [OPTIONS] <LINES> [FILE]
+
+For more information, try '--help'.
+EOF
+cat<<EOF > test.expect
+EOF
+touch test.out test.err
+$SKIP --foo > test.out 2> test.err || true
+$DIFF test.expect test.out
+$DIFF test.expect.err test.err
+rm test.expect test.out
+rm test.expect.err test.err
+
+echo "> handle ignore-extra when token is missing"
+cat<<EOF > test.expect.err
+error: the following required arguments were not provided:
+  --token <TOKEN>
+  <LINES>
+
+Usage: skip --ignore-extras --token <TOKEN> <LINES> [FILE]
+
+For more information, try '--help'.
+EOF
+cat<<EOF > test.expect
+EOF
+touch test.out test.err
+$SKIP --ignore-extras > test.out 2> test.err || true
+$DIFF test.expect test.out
+$DIFF test.expect.err test.err
+rm test.expect test.out
+rm test.expect.err test.err
+
+echo "> skip lines until 4 tokens seen - ignored extra tokens on same line"
+cat<<EOF > test.in
+Lorem ipsum dolor sit amet, 
+consectetur adipiscing elit, 
+sed do eiusmod tempor incididunt 
+ut labore et dolore magna aliqua. 
+Ut enim ad minim veniam, 
+quis nostrud exercitation ullamco 
+laboris nisi ut aliquip ex ea 
+commodo consequat. 
+EOF
+cat<<EOF > test.expect
+quis nostrud exercitation ullamco 
+laboris nisi ut aliquip ex ea 
+commodo consequat. 
+EOF
+$SKIP 4 test.in --token m --ignore-extras > test.out
+$DIFF test.expect test.out
+rm test.in test.expect test.out
+
+echo done