Add --project-origin override

cli/src/args.rs

@@ -153,7 +153,12 @@ pub fn get_args(tagged_filterer: bool) -> Result<ArgMatches<'static>> {
 			.help_heading(Some(OPTSET_OUTPUT))
 			.help("Send a desktop notification when the command ends")
 			.short("N")
-			.long("notify"));
+			.long("notify"))
+		.arg(Arg::with_name("project-origin")
+			.help_heading(Some(OPTSET_FILTERING))
+			.help("Override the project origin: the directory from which ignore files are detected")
+			.value_name("path")
+			.long("project-origin"));
 
 	let app = if tagged_filterer {
 		app.arg(

cli/src/filterer/common.rs

@@ -20,6 +20,10 @@ pub async fn dirs(args: &ArgMatches<'static>) -> Result<(PathBuf, PathBuf)> {
 		.into_diagnostic()?;
 	debug!(?curdir, "current directory");
 
+	let project_origin = if let Some(origin) = args.value_of("project-origin") {
+		debug!(?origin, "project origin override");
+		canonicalize(origin).into_diagnostic()?
+	} else {
 		let homedir = dirs::home_dir()
 			.map(canonicalize)
 			.transpose()
@@ -65,11 +69,12 @@ pub async fn dirs(args: &ArgMatches<'static>) -> Result<(PathBuf, PathBuf)> {
 		debug!(?origins, "resolved all project origins");
 
 		// This canonicalize is probably redundant
-	let project_origin = canonicalize(
+		canonicalize(
 			common_prefix(&origins)
 				.ok_or_else(|| miette!("no common prefix, but this should never fail"))?,
 		)
-	.into_diagnostic()?;
+		.into_diagnostic()?
+	};
 	debug!(?project_origin, "resolved common/project origin");
 
 	let workdir = curdir;

cli/tests/snapshots/help__help_unix.snap

@@ -39,6 +39,8 @@ OPTIONS:
                                              [possible values: do-nothing, queue, restart, signal]
     -w, --watch <path>...                    Watch a specific file or directory
         --force-poll <interval>              Force polling mode (interval in milliseconds)
+        --project-origin <path>              Override the project origin: the directory from which ignore files are
+                                             detected
         --shell <shell>                      Use a different shell, or `none`. Defaults to `sh` (until 2.0, where that
                                              will change to `$SHELL`). E.g. --shell=bash
     -s, --signal <signal>                    Specify the signal to send when using --on-busy-update=signal

cli/tests/snapshots/help__help_windows.snap

@@ -38,6 +38,8 @@ OPTIONS:
                                              [possible values: do-nothing, queue, restart, signal]
     -w, --watch <path>...                    Watch a specific file or directory
         --force-poll <interval>              Force polling mode (interval in milliseconds)
+        --project-origin <path>              Override the project origin: the directory from which ignore files are
+                                             detected
         --shell <shell>                      Use a different shell, or `none`. Try --shell=powershell, which will become
                                              the default in 2.0.
     -s, --signal <signal>                    Specify the signal to send when using --on-busy-update=signal