Add option to ignore files that are older than history

README.md

@@ -26,21 +26,24 @@ For more usage see the `--help` output:
 
 ```console
 $ git-warp-time --help
-CLI utility that resets the timestamps of files in a Git repository working directory to the exact
-timestamp of the last commit which modified each file
+CLI utility that resets the timestamps of files in a Git repository working
+directory to the exact timestamp of the last commit which modified each file
 
 Usage: git-warp-time [OPTIONS] [PATHS]...
 
 Arguments:
-  [PATHS]...  Optional list of paths to operate on instead of default which is all files tracked by
-              Git
+  [PATHS]...  Optional list of paths to operate on instead of default which is
+              all files tracked by Git
 
 Options:
-  -d, --dirty    Include files tracked by Git but modifications in the working tee
-  -i, --ignored  Include files tracked by Git but also ignored
-  -q, --quiet    Don't print any output about files touched or skipped
-  -h, --help     Print help
-  -V, --version  Print version
+  -d, --dirty         Include files tracked by Git but modifications in the
+                      working tee
+  -i, --ignored       Include files tracked by Git but also ignored
+  -o, --ignore-older  Only touch files that are newer than their history, ignore
+                      ones that are older
+  -q, --quiet         Don't print any output about files touched or skipped
+  -h, --help          Print help
+  -V, --version       Print version
 ```
 
 ## Library Usage
@@ -49,7 +52,7 @@ In your `Cargo.toml` file.
 
 ```toml
 [dependencies]
-git-warp-time = "0.7"
+git-warp-time = "0.8"
 ```
 
 Then use the crate functions and types in your project something like this:

src/bin/git-warp-time.rs

@@ -44,6 +44,7 @@ fn main() -> Result<()> {
     let mut opts = git_warp_time::Options::new()
         .dirty(matches.get_flag("dirty"))
         .ignored(matches.get_flag("ignored"))
+        .ignore_older(matches.get_flag("ignore_older"))
         .verbose(!matches.get_flag("quiet"));
     if matches.contains_id("paths") {
         let mut paths: FileSet = FileSet::new();

src/cli.rs

@@ -13,6 +13,10 @@ pub struct Cli {
     #[clap(short, long)]
     pub ignored: bool,
 
+    /// Only touch files that are newer than their history, ignore ones that are older
+    #[clap(short = 'o', long)]
+    pub ignore_older: bool,
+
     /// Don't print any output about files touched or skipped
     #[clap(short, long)]
     pub quiet: bool,

src/lib.rs

@@ -56,6 +56,7 @@ pub struct Options {
     paths: Option<FileSet>,
     dirty: bool,
     ignored: bool,
+    ignore_older: bool,
     verbose: bool,
 }
 
@@ -74,6 +75,7 @@ impl Options {
             paths: None,
             dirty: false,
             ignored: false,
+            ignore_older: false,
             verbose: false,
         }
     }
@@ -84,6 +86,7 @@ impl Options {
             paths: self.paths.clone(),
             dirty: flag,
             ignored: self.ignored,
+            ignore_older: self.ignore_older,
             verbose: self.verbose,
         }
     }
@@ -94,6 +97,18 @@ impl Options {
             paths: self.paths.clone(),
             dirty: self.dirty,
             ignored: flag,
+            ignore_older: self.ignore_older,
+            verbose: self.verbose,
+        }
+    }
+
+    /// Whether or not to touch files older than history, default is true
+    pub fn ignore_older(&self, flag: bool) -> Options {
+        Options {
+            paths: self.paths.clone(),
+            dirty: self.dirty,
+            ignored: self.ignored,
+            ignore_older: flag,
             verbose: self.verbose,
         }
     }
@@ -104,6 +119,7 @@ impl Options {
             paths: self.paths.clone(),
             dirty: self.dirty,
             ignored: self.ignored,
+            ignore_older: self.ignore_older,
             verbose: flag,
         }
     }
@@ -114,6 +130,7 @@ impl Options {
             paths: input,
             dirty: self.dirty,
             ignored: self.ignored,
+            ignore_older: self.ignore_older,
             verbose: self.verbose,
         }
     }
@@ -236,11 +253,16 @@ fn diff_affects_oid(diff: &Diff, oid: &Oid, touchable_path: &mut Utf8PathBuf) ->
     })
 }
 
-fn touch_if_older(path: Utf8PathBuf, time: i64, verbose: bool) -> Result<bool> {
+fn touch_if_time_mismatch(
+    path: Utf8PathBuf,
+    time: i64,
+    verbose: bool,
+    ignore_older: bool,
+) -> Result<bool> {
     let commit_time = FileTime::from_unix_time(time, 0);
     let metadata = fs::metadata(&path).context(IoSnafu)?;
     let file_mtime = FileTime::from_last_modification_time(&metadata);
-    if file_mtime != commit_time {
+    if file_mtime > commit_time || (!ignore_older && file_mtime < commit_time) {
         filetime::set_file_mtime(&path, commit_time).context(IoSnafu)?;
         if verbose {
             println!("Rewound the clock: {path}");
@@ -296,7 +318,12 @@ fn process_touchables(repo: &Repository, touchables: FileSet, opts: &Options) ->
             let affected = diff_affects_oid(&diff, oid, touchable_path);
             if affected {
                 let time = commit.time().seconds();
-                if let Ok(true) = touch_if_older(touchable_path.to_path_buf(), time, opts.verbose) {
+                if let Ok(true) = touch_if_time_mismatch(
+                    touchable_path.to_path_buf(),
+                    time,
+                    opts.verbose,
+                    opts.ignore_older,
+                ) {
                     touched
                         .write()
                         .unwrap()