From af27c560f7f272bb70306461146984882afa8e56 Mon Sep 17 00:00:00 2001
From: Dan Davison <dandavison7@gmail.com>
Date: Sun, 22 Nov 2020 19:24:51 -0500
Subject: Handle copied files

Fixes #392
---
 src/cli.rs         | 4 ++++
 src/config.rs      | 2 ++
 src/delta.rs       | 8 ++++++--
 src/options/set.rs | 1 +
 src/parse.rs       | 8 ++++++++
 5 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/src/cli.rs b/src/cli.rs
index 8daa8efc..a366f529 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -437,6 +437,10 @@ pub struct Opt {
     /// Text to display in front of a added file path.
     pub file_added_label: String,
 
+    #[structopt(long = "file-copied-label", default_value = "copied:")]
+    /// Text to display in front of a copied file path.
+    pub file_copied_label: String,
+
     #[structopt(long = "file-renamed-label", default_value = "renamed:")]
     /// Text to display in front of a renamed file path.
     pub file_renamed_label: String,
diff --git a/src/config.rs b/src/config.rs
index 9a26b677..28983b6d 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -23,6 +23,7 @@ pub struct Config {
     pub commit_style: Style,
     pub decorations_width: cli::Width,
     pub file_added_label: String,
+    pub file_copied_label: String,
     pub file_modified_label: String,
     pub file_removed_label: String,
     pub file_renamed_label: String,
@@ -151,6 +152,7 @@ impl From<cli::Opt> for Config {
             commit_style,
             decorations_width: opt.computed.decorations_width,
             file_added_label: opt.file_added_label,
+            file_copied_label: opt.file_copied_label,
             file_modified_label: opt.file_modified_label,
             file_removed_label: opt.file_removed_label,
             file_renamed_label: opt.file_renamed_label,
diff --git a/src/delta.rs b/src/delta.rs
index 180a3893..af4106a3 100644
--- a/src/delta.rs
+++ b/src/delta.rs
@@ -98,7 +98,9 @@ where
             state = State::FileMeta;
             handled_file_meta_header_line_file_pair = None;
         } else if (state == State::FileMeta || source == Source::DiffUnified)
-            && (line.starts_with("--- ") || line.starts_with("rename from "))
+            && (line.starts_with("--- ")
+                || line.starts_with("rename from ")
+                || line.starts_with("copy from "))
         {
             let parsed_file_meta_line =
                 parse::parse_file_meta_line(&line, source == Source::GitDiff);
@@ -114,7 +116,9 @@ where
                 ));
             }
         } else if (state == State::FileMeta || source == Source::DiffUnified)
-            && (line.starts_with("+++ ") || line.starts_with("rename to "))
+            && (line.starts_with("+++ ")
+                || line.starts_with("rename to ")
+                || line.starts_with("copy to "))
         {
             let parsed_file_meta_line =
                 parse::parse_file_meta_line(&line, source == Source::GitDiff);
diff --git a/src/options/set.rs b/src/options/set.rs
index 67a5e21d..87eef7d4 100644
--- a/src/options/set.rs
+++ b/src/options/set.rs
@@ -129,6 +129,7 @@ pub fn set_options(
             commit_decoration_style,
             commit_style,
             file_added_label,
+            file_copied_label,
             file_decoration_style,
             file_modified_label,
             file_removed_label,
diff --git a/src/parse.rs b/src/parse.rs
index 05b0ceb5..7e39c772 100644
--- a/src/parse.rs
+++ b/src/parse.rs
@@ -22,6 +22,7 @@ pub fn get_file_extension_from_marker_line(line: &str) -> Option<&str> {
 #[derive(Debug, PartialEq)]
 pub enum FileEvent {
     Change,
+    Copy,
     Rename,
     NoEvent,
 }
@@ -47,6 +48,12 @@ pub fn parse_file_meta_line(line: &str, git_diff_name: bool) -> (String, FileEve
         line if line.starts_with("rename to ") => {
             (line[10..].to_string(), FileEvent::Rename) // "rename to ".len()
         }
+        line if line.starts_with("copy from ") => {
+            (line[10..].to_string(), FileEvent::Copy) // "copy from ".len()
+        }
+        line if line.starts_with("copy to ") => {
+            (line[8..].to_string(), FileEvent::Copy) // "copy to ".len()
+        }
         _ => ("".to_string(), FileEvent::NoEvent),
     }
 }
@@ -103,6 +110,7 @@ pub fn get_file_change_description_from_file_paths(
                 "{}{} ⟶   {}",
                 format_label(match file_event {
                     FileEvent::Rename => &config.file_renamed_label,
+                    FileEvent::Copy => &config.file_copied_label,
                     _ => "",
                 }),
                 format_file(minus_file),
-- 
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