From 53b619e1c927c518c27150c8ac0a4c99791c61cd Mon Sep 17 00:00:00 2001
From: Malf Furious <m@lfurio.us>
Date: Tue, 9 Oct 2018 22:14:41 -0400
Subject: Add diff / shortdiff ops

---
 diff.sh | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 main.sh |  4 ++++
 make.sh |  2 +-
 3 files changed, 65 insertions(+), 1 deletion(-)
 create mode 100644 diff.sh

diff --git a/diff.sh b/diff.sh
new file mode 100644
index 0000000..9f3480c
--- /dev/null
+++ b/diff.sh
@@ -0,0 +1,60 @@
+##
+# systrunk diff [<from>=BASE] [<to>=WKTREE]
+#
+# Perform a unified diff (diff -u) between <from> and <to>, which
+# should be two revisions in the repository.  If not supplied, <to>
+# will be the worktree.  Otherwise, there is no way to specify the
+# worktree.
+##
+function systr_diff
+{
+    if [ $# -lt 2 ]; then
+        to="."
+    else
+        to=$(systr_repo_resolve_reference "$2")
+        to="$path/revs/$to/"
+    fi
+
+    if [ $# -lt 1 ]; then
+        from="$BASE"
+    else
+        from=$(systr_repo_resolve_reference "$1")
+    fi
+
+    from="$path/revs/$from/"
+
+    diff -ruNd --color=auto --exclude='*.systr' "$from" "$to"
+}
+
+##
+# systrunk shortdiff [<from>=BASE] [<to>=WKTREE]
+#
+# Indicate only names of files that have been changed, added,
+# or removed between <from> and <to>, which should be two
+# revisions in the repository.  If not supplied, <to> will be
+# the worktree.  Otherwise, there is no way to specify the
+# worktree.
+##
+function systr_short_diff
+{
+    if [ $# -lt 2 ]; then
+        to="."
+    else
+        to=$(systr_repo_resolve_reference "$2")
+        to="$path/revs/$to/"
+    fi
+
+    if [ $# -lt 1 ]; then
+        from="$BASE"
+    else
+        from=$(systr_repo_resolve_reference "$1")
+    fi
+
+    if [[ "$from" == "NULL" ]]; then
+        exit
+    fi
+
+    from="$path/revs/$from/"
+
+    diff -qr --exclude='*.systr' "$from" "$to"
+}
diff --git a/main.sh b/main.sh
index f5a2df7..63c43ff 100644
--- a/main.sh
+++ b/main.sh
@@ -55,6 +55,10 @@ function main
         systr_short_log "$@"
     elif [[ "$cmd" == "log" ]]; then
         systr_log "$@"
+    elif [[ "$cmd" == "shortdiff" ]]; then
+        systr_short_diff "$@"
+    elif [[ "$cmd" == "diff" ]]; then
+        systr_diff "$@"
     elif [[ "$cmd" == "merge" ]]; then
         systr_merge "$@"
     elif [[ "$cmd" == "update" ]]; then
diff --git a/make.sh b/make.sh
index 7c40920..0ba5124 100755
--- a/make.sh
+++ b/make.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/bash
 echo "#!/usr/bin/bash -e" >systrunk
 cat rsync.sh repo-access.sh repo-mutate.sh >>systrunk
-cat checkout.sh commit.sh merge.sh main.sh >>systrunk
+cat checkout.sh commit.sh merge.sh diff.sh main.sh >>systrunk
 chmod +x systrunk
-- 
cgit v1.2.3