Add diff / shortdiff ops

1 files changed, 60 insertions, 0 deletions

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"
+}