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-rw-r--r--editors/diff.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/editors/diff.c b/editors/diff.c
index 3719bb4..daa58af 100644
--- a/editors/diff.c
+++ b/editors/diff.c
@@ -76,6 +76,28 @@
* 6n words for files of length n.
*/
+//usage:#define diff_trivial_usage
+//usage: "[-abBdiNqrTstw] [-L LABEL] [-S FILE] [-U LINES] FILE1 FILE2"
+//usage:#define diff_full_usage "\n\n"
+//usage: "Compare files line by line and output the differences between them.\n"
+//usage: "This implementation supports unified diffs only.\n"
+//usage: "\nOptions:"
+//usage: "\n -a Treat all files as text"
+//usage: "\n -b Ignore changes in the amount of whitespace"
+//usage: "\n -B Ignore changes whose lines are all blank"
+//usage: "\n -d Try hard to find a smaller set of changes"
+//usage: "\n -i Ignore case differences"
+//usage: "\n -L Use LABEL instead of the filename in the unified header"
+//usage: "\n -N Treat absent files as empty"
+//usage: "\n -q Output only whether files differ"
+//usage: "\n -r Recurse"
+//usage: "\n -S Start with FILE when comparing directories"
+//usage: "\n -T Make tabs line up by prefixing a tab when necessary"
+//usage: "\n -s Report when two files are the same"
+//usage: "\n -t Expand tabs to spaces in output"
+//usage: "\n -U Output LINES lines of context"
+//usage: "\n -w Ignore all whitespace"
+
#include "libbb.h"
#if 0