refactor: put the dry-run and quiet checks on Ctx

src/cmd/compose.rs

@@ -1,4 +1,5 @@
 use super::{Argv, Cmd};
+use crate::ctx::Ctx;
 
 // compose prints its own progress, which --quiet has to ask it to stop
 fn compose(quiet: bool) -> Argv {
@@ -10,6 +11,49 @@ fn compose(quiet: bool) -> Argv {
     }
 }
 
+// the compose commands, each already knowing whether -q asked compose to stop
+// narrating. the flag was a field every construction site set by hand, and
+// three of them did not, so `ahab -q` still had compose talking over the output
+pub struct Compose<'a> {
+    ctx: &'a Ctx,
+}
+
+impl<'a> Compose<'a> {
+    pub(crate) fn new(ctx: &'a Ctx) -> Self {
+        Self { ctx }
+    }
+
+    pub fn up(&self) -> Up {
+        Up {
+            quiet: self.ctx.quiet,
+        }
+    }
+
+    pub fn stop(&self) -> Stop {
+        Stop {
+            quiet: self.ctx.quiet,
+        }
+    }
+
+    pub fn start(&self, service: &'a str) -> Start<'a> {
+        Start {
+            service,
+            quiet: self.ctx.quiet,
+        }
+    }
+
+    // reading the project says nothing, so there is no progress to quieten
+    pub fn config(&self) -> Config {
+        Config
+    }
+
+    pub fn ps(&self, service: &str) -> Ps {
+        Ps {
+            service: service.to_string(),
+        }
+    }
+}
+
 // docker compose run --rm, which runs the image's entrypoint and so fixes up the
 // container user before handing over
 pub struct Run {
@@ -19,20 +63,15 @@ pub struct Run {
 }
 
 impl Run {
-    pub fn wrapping(service: &str, inner: Argv) -> Self {
+    // only reached through Cmd::in_service, which takes the context, so the
+    // progress flag cannot be left off by forgetting a builder call
+    pub(super) fn wrapping(ctx: &Ctx, service: &str, inner: Argv) -> Self {
         Self {
             service: service.to_string(),
             inner,
-            quiet: false,
+            quiet: ctx.quiet,
         }
     }
-
-    // compose narrates the container it creates before handing over, which is
-    // progress along the way rather than what was asked for
-    pub fn quiet(mut self, quiet: bool) -> Self {
-        self.quiet = quiet;
-        self
-    }
 }
 
 impl Cmd for Run {
@@ -59,14 +98,6 @@ pub struct Ps {
     service: String,
 }
 
-impl Ps {
-    pub fn id_of(service: &str) -> Self {
-        Self {
-            service: service.to_string(),
-        }
-    }
-}
-
 impl Cmd for Ps {
     fn argv(&self) -> Argv {
         compose(false).arg("ps").arg("--quiet").arg(&self.service)
@@ -74,7 +105,7 @@ impl Cmd for Ps {
 }
 
 pub struct Up {
-    pub quiet: bool,
+    quiet: bool,
 }
 
 impl Cmd for Up {
@@ -84,8 +115,8 @@ impl Cmd for Up {
 }
 
 pub struct Start<'a> {
-    pub service: &'a str,
+    service: &'a str,
-    pub quiet: bool,
+    quiet: bool,
 }
 
 impl Cmd for Start<'_> {
@@ -95,7 +126,7 @@ impl Cmd for Start<'_> {
 }
 
 pub struct Stop {
-    pub quiet: bool,
+    quiet: bool,
 }
 
 impl Cmd for Stop {

src/cmd/mod.rs

@@ -14,7 +14,7 @@ use std::{
 use anyhow::Result;
 
 pub use argv::Argv;
-pub use compose::{Config, Ps, Run, Start, Stop, Up};
+pub use compose::{Compose, Run};
 pub use django::{Bash, Manage, Words};
 pub use docker::{Cp, Exec};
 pub use git::{CheckIgnore, ConfigGet, LsFiles, RevParse};
@@ -43,9 +43,12 @@ pub trait Cmd {
         Exec::wrapping(container, self.argv())
     }
 
-    fn in_service(&self, service: &str) -> Run {
+    // the context comes in here because compose narrates what it is doing, and
-        Run::wrapping(service, self.argv())
+    // whether it should is the caller's -q rather than this command's business
+    fn in_service(&self, ctx: &Ctx, service: &str) -> Run {
+        Run::wrapping(ctx, service, self.argv())
     }
+
     // terminals
     fn run(&self, ctx: &Ctx) -> Result<()> {
         self.argv().run(ctx)

src/commands/django.rs

@@ -4,7 +4,7 @@ use anyhow::{Result, anyhow};
 
 use crate::cmd::{Bash, Cmd, Manage, Words};
 use crate::ctx::Ctx;
-use crate::fsops::{create_dir, touch, write_new};
+
 use crate::output::note;
 use crate::project::Project;
 
@@ -40,8 +40,8 @@ pub fn make_command(ctx: &Ctx, app: &Path, name: &str) -> Result<()> {
     let management_dir = app_dir.join("management");
 
     if !management_dir.exists() {
-        create_dir(ctx, &management_dir)?;
+        ctx.fs().create_dir(&management_dir)?;
-        touch(ctx, &management_dir.join("__init__.py"))?;
+        ctx.fs().touch(&management_dir.join("__init__.py"))?;
 
         note!(ctx, "created module {app_name}.management")
     };
@@ -49,14 +49,13 @@ pub fn make_command(ctx: &Ctx, app: &Path, name: &str) -> Result<()> {
     let commands_dir = management_dir.join("commands");
 
     if !commands_dir.exists() {
-        create_dir(ctx, &commands_dir)?;
+        ctx.fs().create_dir(&commands_dir)?;
-        touch(ctx, &commands_dir.join("__init__.py"))?;
+        ctx.fs().touch(&commands_dir.join("__init__.py"))?;
 
         note!(ctx, "created module {app_name}.management.commands")
     };
 
-    write_new(
+    ctx.fs().write_new(
-        ctx,
         &commands_dir.join(format!("{name}.py")),
         DEBUG_TEMPLATE.as_bytes(),
     )?;
@@ -72,22 +71,18 @@ fn is_module_name(name: &str) -> bool {
 }
 
 pub fn bash(ctx: &Ctx) -> Result<()> {
-    Bash.in_service(&service(ctx)?)
+    Bash.in_service(ctx, &service(ctx)?).replace(ctx)
-        .quiet(ctx.quiet)
-        .replace(ctx)
 }
 
 pub fn run(ctx: &Ctx, rest: &[String]) -> Result<()> {
     Words::new(rest)
-        .in_service(&service(ctx)?)
+        .in_service(ctx, &service(ctx)?)
-        .quiet(ctx.quiet)
         .replace(ctx)
 }
 
 pub fn manage(ctx: &Ctx, rest: &[String]) -> Result<()> {
     Manage::new(rest)
-        .in_service(&service(ctx)?)
+        .in_service(ctx, &service(ctx)?)
-        .quiet(ctx.quiet)
         .replace(ctx)
 }
 

src/commands/link.rs

@@ -11,9 +11,7 @@ use anyhow::{Context, Result, anyhow, bail};
 
 use self::store::{Leads, Repo, ignored, leads, resolve, symlink_metadata_opt, tracked};
 use crate::ctx::Ctx;
-use crate::fsops::{
+use crate::fsops::suffixed;
-    ensure_private_parent, move_path, place_link, prune_empty, remove_file, rename, suffixed,
-};
 use crate::output::{line, note, warning};
 
 const BACKUP_SUFFIX: &str = ".ahab-bak";
@@ -137,10 +135,10 @@ fn restore_one(ctx: &Ctx, repo: &Repo, path: &Path, report: &Report) -> Result<(
         bail!("{} is in the way; move it aside", aside.display());
     }
 
-    rename(ctx, &src, &aside)?;
+    ctx.fs().rename(&src, &aside)?;
 
-    if let Err(e) = move_path(ctx, &stored, &src) {
+    if let Err(e) = ctx.fs().move_path(&stored, &src) {
-        rename(ctx, &aside, &src).with_context(|| {
+        ctx.fs().rename(&aside, &src).with_context(|| {
             format!(
                 "could not put the link at {} back after failing to restore it",
                 src.display()
@@ -150,8 +148,8 @@ fn restore_one(ctx: &Ctx, repo: &Repo, path: &Path, report: &Report) -> Result<(
         return Err(e);
     }
 
-    remove_file(ctx, &aside)?;
+    ctx.fs().remove_file(&aside)?;
-    prune_empty(ctx, stored.parent(), &repo.base);
+    ctx.fs().prune_empty(stored.parent(), &repo.base);
 
     report.line("restored", &rel);
     Ok(())
@@ -295,7 +293,7 @@ fn link_one(ctx: &Ctx, repo: &Repo, path: &Path, force: bool, report: &Report) -
     stays_in_store(repo, &rel)?;
     // before anything is moved in, so the tree it lands in is never briefly
     // readable by anyone else
-    ensure_private_parent(ctx, &repo.base, &target)?;
+    ctx.fs().ensure_private_parent(&repo.base, &target)?;
 
     if tracked(ctx, repo, &rel)? {
         return Err(anyhow!(
@@ -363,7 +361,7 @@ fn link_one(ctx: &Ctx, repo: &Repo, path: &Path, force: bool, report: &Report) -
                 return Err(needs_force(&target));
             }
 
-            place_link(ctx, &src, &target)?;
+            ctx.fs().place_link(&src, &target)?;
             report.line("repointed", &rel);
             Ok(())
         }
@@ -381,10 +379,10 @@ fn link_one(ctx: &Ctx, repo: &Repo, path: &Path, force: bool, report: &Report) -
                 ));
             }
 
-            rename(ctx, &src, &backup)?;
+            ctx.fs().rename(&src, &backup)?;
             report.line("saved", &suffixed(&rel, BACKUP_SUFFIX));
 
-            place_link(ctx, &src, &target)?;
+            ctx.fs().place_link(&src, &target)?;
             report.line("linked", &rel);
             Ok(())
         }
@@ -399,7 +397,7 @@ fn link_one(ctx: &Ctx, repo: &Repo, path: &Path, force: bool, report: &Report) -
             if !force {
                 return Err(needs_force(&target));
             }
-            place_link(ctx, &src, &target)?;
+            ctx.fs().place_link(&src, &target)?;
             report.line("linked", &rel);
             Ok(())
         }
@@ -416,10 +414,10 @@ fn link_one(ctx: &Ctx, repo: &Repo, path: &Path, force: bool, report: &Report) -
 // but no link placed, the store holds a path nothing points at and the working
 // tree has lost it altogether, which is the one outcome worse than failing
 fn move_and_link(ctx: &Ctx, src: &Path, target: &Path) -> Result<()> {
-    move_path(ctx, src, target)?;
+    ctx.fs().move_path(src, target)?;
 
-    if let Err(e) = place_link(ctx, src, target) {
+    if let Err(e) = ctx.fs().place_link(src, target) {
-        move_path(ctx, target, src).with_context(|| {
+        ctx.fs().move_path(target, src).with_context(|| {
             format!(
                 "could not put {} back after failing to link it to {}",
                 src.display(),

src/commands/postgres.rs

@@ -11,11 +11,10 @@ use self::server::{Database, wait_until_ready, when_ready};
 use self::shape::{Dump, HEADER_LEN, Kind};
 use crate::cli::Format;
 use crate::cmd::{
-    Cmd, Cp, CreateDb, DropDb, Gunzip, Gzip, Head, PgDump, PgDumpAll, PgRestore, Psql, Rm, Start,
+    Cmd, Cp, CreateDb, DropDb, Gunzip, Gzip, Head, PgDump, PgDumpAll, PgRestore, Psql, Rm,
-    Stop, Up,
 };
 use crate::ctx::Ctx;
-use crate::fsops::{create_private_new, remove_file, rename, suffixed};
+use crate::fsops::{create_private_new, suffixed};
 use crate::output::{note, warning};
 
 // unique per run: docker cp will not copy a directory over an existing path, and
@@ -136,7 +135,7 @@ pub fn import(ctx: &Ctx, file: &Path) -> Result<()> {
     }
 
     note!(ctx, "stopping all containers");
-    Stop { quiet: ctx.quiet }.run(ctx)?;
+    ctx.compose().stop().run(ctx)?;
 
     // everything from here runs with the project down, so an error leaves it
     // that way and the user has no reason to guess as much
@@ -159,11 +158,7 @@ fn local_path_for_docker(file: &Path) -> Result<()> {
 
 fn imported(ctx: &Ctx, db: &Database, dump: &Dump, file: &Path) -> Result<()> {
     note!(ctx, "starting db container");
-    Start {
+    ctx.compose().start(&db.service).run(ctx)?;
-        service: &db.service,
-        quiet: ctx.quiet,
-    }
-    .run(ctx)?;
 
     let remote = remote_dump();
 
@@ -229,8 +224,8 @@ fn imported(ctx: &Ctx, db: &Database, dump: &Dump, file: &Path) -> Result<()> {
     restored?;
 
     note!(ctx, "restarting containers");
-    Stop { quiet: ctx.quiet }.run(ctx)?;
+    ctx.compose().stop().run(ctx)?;
-    Up { quiet: ctx.quiet }.run(ctx)?;
+    ctx.compose().up().run(ctx)?;
 
     Ok(())
 }
@@ -337,11 +332,11 @@ pub fn dump(ctx: &Ctx, file: &Path, format: Format, gzip: bool) -> Result<()> {
     };
 
     if let Err(e) = dumped {
-        let _ = remove_file(ctx, &partial);
+        let _ = ctx.fs().remove_file(&partial);
         return Err(e);
     }
 
-    rename(ctx, &partial, file)?;
+    ctx.fs().rename(&partial, file)?;
 
     Ok(())
 }

src/commands/postgres/server.rs

@@ -4,7 +4,7 @@ use std::time::{Duration, Instant};
 use anyhow::{Result, bail};
 
 use super::shape::Kind;
-use crate::cmd::{Cmd, PgIsReady, PgRestore, Ps, Psql};
+use crate::cmd::{Cmd, PgIsReady, PgRestore, Psql};
 use crate::ctx::Ctx;
 use crate::project::Project;
 
@@ -26,7 +26,7 @@ impl Database {
         let service = compose.postgres()?;
         let (user, name) = compose.postgres_credentials(&service)?;
 
-        let listed = Ps::id_of(&service).capture(ctx)?;
+        let listed = ctx.compose().ps(&service).capture(ctx)?;
         let mut ids = listed.lines().map(str::trim).filter(|id| !id.is_empty());
 
         let container = match (ids.next(), ids.next()) {

src/commands/status.rs

@@ -2,7 +2,7 @@ use std::path::Path;
 
 use anyhow::Result;
 
-use crate::cmd::{Cmd, Ps};
+use crate::cmd::Cmd;
 use crate::commands::link;
 use crate::ctx::Ctx;
 use crate::output::line;
@@ -62,7 +62,7 @@ fn role(ctx: &Ctx, role: &str, detected: Result<String>, project: &Project) {
 
     line!("{role}: {service} ({image})");
 
-    match Ps::id_of(&service).capture(ctx) {
+    match ctx.compose().ps(&service).capture(ctx) {
         Ok(id) if id.trim().is_empty() => line!("\tcontainer: not running"),
         Ok(id) => line!("\tcontainer: {}", short(id.trim())),
         Err(e) => line!("\tcontainer: {e:#}"),

src/ctx.rs

@@ -1,6 +1,22 @@
+use crate::cmd::Compose;
+use crate::fsops::Fs;
+
 // how ahab was invoked, handed to everything that runs commands or writes files
 pub struct Ctx {
     pub verbose: bool,
     pub dry_run: bool,
     pub quiet: bool,
 }
+
+impl Ctx {
+    // the two things these flags actually decide, asked for by name rather than
+    // read field by field wherever they are needed: a dry run writes nothing,
+    // and --quiet stops compose narrating
+    pub fn fs(&self) -> Fs<'_> {
+        Fs::new(self)
+    }
+
+    pub fn compose(&self) -> Compose<'_> {
+        Compose::new(self)
+    }
+}

src/fsops.rs

@@ -16,47 +16,59 @@ pub fn suffixed(path: &Path, suffix: &str) -> PathBuf {
     PathBuf::from(out)
 }
 
-// every write to the working tree goes through this module, so a dry run is held
+// the working tree, as this invocation is allowed to touch it. every write goes
-// back in one place rather than at each call site
+// through here, so what a dry run means is settled in one place rather than at
-pub fn move_path(ctx: &Ctx, src: &Path, target: &Path) -> Result<()> {
+// the top of each operation, where the next one added could simply not ask
-    if ctx.dry_run {
+pub struct Fs<'a> {
-        return Ok(());
+    ctx: &'a Ctx,
+}
+
+impl<'a> Fs<'a> {
+    pub(crate) fn new(ctx: &'a Ctx) -> Self {
+        Self { ctx }
     }
 
-    ensure_parent(ctx, target)?;
+    // a dry run writes nothing and reports that nothing went wrong, which for
+    // every operation here is its empty answer
+    fn unless_planned<T: Default>(&self, act: impl FnOnce() -> Result<T>) -> Result<T> {
+        match self.ctx.dry_run {
+            true => Ok(T::default()),
+            false => act(),
+        }
+    }
+
+    pub fn move_path(&self, src: &Path, target: &Path) -> Result<()> {
+        self.unless_planned(|| {
+            ensure_parent(target)?;
 
             // rename cannot cross filesystems, and the store often is another one
             match fs::rename(src, target) {
                 Ok(()) => Ok(()),
                 Err(rename_err) => match copy_recursive(src, target) {
-            Ok(()) => remove_recursive(ctx, src),
+                    Ok(()) => remove_recursive(src),
                     Err(copy_err) => Err(copy_err).with_context(|| format!("after {rename_err}")),
                 },
             }
-}
+        })
-
-pub fn rename(ctx: &Ctx, src: &Path, target: &Path) -> Result<()> {
-    if ctx.dry_run {
-        return Ok(());
     }
 
-    Ok(fs::rename(src, target)?)
+    pub fn rename(&self, src: &Path, target: &Path) -> Result<()> {
-}
+        self.unless_planned(|| Ok(fs::rename(src, target)?))
-
-pub fn place_link(ctx: &Ctx, link_path: &Path, target: &Path) -> Result<()> {
-    if ctx.dry_run {
-        return Ok(());
     }
 
-    // the parent can be missing when the store holds a path the repository does
+    pub fn place_link(&self, link_path: &Path, target: &Path) -> Result<()> {
-    // not have any more, and symlink would only report the bare ENOENT
+        self.unless_planned(|| {
-    ensure_parent(ctx, link_path)?;
+            // the parent can be missing when the store holds a path the
+            // repository does not have any more, and symlink would only report
+            // the bare ENOENT
+            ensure_parent(link_path)?;
 
-    // symlink under a temp name and rename over the path: the rename is atomic
+            // symlink under a temp name and rename over the path: the rename is
+            // atomic
             let tmp = suffixed(link_path, ".ahab-tmp");
 
-    // only ahab's own leftover is cleared away: anything else here belongs to
+            // only ahab's own leftover is cleared away: anything else here
-    // the project, and silently unlinking it would lose it
+            // belongs to the project, and silently unlinking it would lose it
             match fs::symlink_metadata(&tmp) {
                 Ok(meta) if meta.is_symlink() => fs::remove_file(&tmp)?,
                 Ok(_) => {
@@ -72,29 +84,46 @@ pub fn place_link(ctx: &Ctx, link_path: &Path, target: &Path) -> Result<()> {
 
             symlink(target, &tmp)?;
             Ok(fs::rename(&tmp, link_path)?)
-}
+        })
-
-// 0600 and only where nothing is yet. a dump is the whole database, and
-// pg_dumpall's is every role's password hash, so it is not the owner's to share
-// by default; create_new also refuses to follow a symlink planted at the path,
-// which File::create would open and truncate
-pub fn create_private_new(path: &Path) -> Result<std::fs::File> {
-    std::fs::OpenOptions::new()
-        .write(true)
-        .create_new(true)
-        .mode(0o600)
-        .open(path)
-        .with_context(|| format!("creating {}", path.display()))
-}
-
-// the store holds what should not be reachable from the repository, so the
-// directories it is kept in are the owner's alone. only the tree at or below
-// `base` is created here; what is above it is the user's own business
-pub fn ensure_private_parent(ctx: &Ctx, base: &Path, target: &Path) -> Result<()> {
-    if ctx.dry_run {
-        return Ok(());
     }
 
+    pub fn remove_file(&self, path: &Path) -> Result<()> {
+        self.unless_planned(|| Ok(fs::remove_file(path)?))
+    }
+
+    pub fn create_dir(&self, path: &Path) -> Result<()> {
+        self.unless_planned(|| Ok(fs::create_dir(path)?))
+    }
+
+    // created if it is missing, left as it is otherwise, which is what a caller
+    // making an empty __init__.py wants
+    pub fn touch(&self, path: &Path) -> Result<()> {
+        self.unless_planned(|| {
+            fs::OpenOptions::new()
+                .write(true)
+                .create(true)
+                .truncate(false)
+                .open(path)?;
+
+            Ok(())
+        })
+    }
+
+    // fails rather than writing over a file that is already there
+    pub fn write_new(&self, path: &Path, contents: &[u8]) -> Result<()> {
+        self.unless_planned(|| {
+            let mut file = fs::File::create_new(path)?;
+            file.write_all(contents)?;
+
+            Ok(())
+        })
+    }
+
+    // the store holds what should not be reachable from the repository, so the
+    // directories it is kept in are the owner's alone. only the tree at or
+    // below `base` is created here; what is above it is the user's own business
+    pub fn ensure_private_parent(&self, base: &Path, target: &Path) -> Result<()> {
+        self.unless_planned(|| {
             let Some(parent) = target.parent().filter(|dir| dir.starts_with(base)) else {
                 return Ok(());
             };
@@ -105,22 +134,55 @@ pub fn ensure_private_parent(ctx: &Ctx, base: &Path, target: &Path) -> Result<()
                 .mode(0o700)
                 .create(parent)
                 .with_context(|| format!("creating {}", parent.display()))
-}
+        })
-
-pub fn remove_file(ctx: &Ctx, path: &Path) -> Result<()> {
-    if ctx.dry_run {
-        return Ok(());
     }
 
-    Ok(fs::remove_file(path)?)
+    // a restored path can leave the store holding nothing but empty directories
+    pub fn prune_empty(&self, dir: Option<&Path>, stop: &Path) {
+        let pruned: Result<()> = self.unless_planned(|| {
+            let mut dir = dir;
+
+            while let Some(path) = dir {
+                if path == stop || !path.starts_with(stop) || fs::remove_dir(path).is_err() {
+                    break;
+                }
+
+                dir = path.parent();
+            }
+
+            Ok(())
+        });
+
+        // an empty directory left behind is untidy, not a failure
+        let _ = pruned;
+    }
+}
+
+// 0600 and only where nothing is yet. a dump is the whole database, and
+// pg_dumpall's is every role's password hash, so it is not the owner's to share
+// by default; create_new also refuses to follow a symlink planted at the path,
+// which File::create would open and truncate.
+//
+// not on Fs: a dry run has no file to hand back, so its one caller asks for
+// this only once it knows it is writing for real
+pub fn create_private_new(path: &Path) -> Result<std::fs::File> {
+    std::fs::OpenOptions::new()
+        .write(true)
+        .create_new(true)
+        .mode(0o600)
+        .open(path)
+        .with_context(|| format!("creating {}", path.display()))
+}
+
+fn ensure_parent(target: &Path) -> Result<()> {
+    match target.parent() {
+        Some(parent) if !parent.as_os_str().is_empty() => Ok(fs::create_dir_all(parent)?),
+        _ => Ok(()),
+    }
 }
 
 // whatever is there, file, directory or symlink
-fn remove_recursive(ctx: &Ctx, path: &Path) -> Result<()> {
+fn remove_recursive(path: &Path) -> Result<()> {
-    if ctx.dry_run {
-        return Ok(());
-    }
-
     if fs::symlink_metadata(path)?.is_dir() {
         fs::remove_dir_all(path)?;
     } else {
@@ -130,70 +192,6 @@ fn remove_recursive(ctx: &Ctx, path: &Path) -> Result<()> {
     Ok(())
 }
 
-fn ensure_parent(ctx: &Ctx, target: &Path) -> Result<()> {
-    if ctx.dry_run {
-        return Ok(());
-    }
-
-    match target.parent() {
-        Some(parent) if !parent.as_os_str().is_empty() => Ok(fs::create_dir_all(parent)?),
-        _ => Ok(()),
-    }
-}
-
-pub fn create_dir(ctx: &Ctx, path: &Path) -> Result<()> {
-    if ctx.dry_run {
-        return Ok(());
-    }
-
-    Ok(fs::create_dir(path)?)
-}
-
-// created if it is missing, left as it is otherwise, which is what a caller
-// making an empty __init__.py wants
-pub fn touch(ctx: &Ctx, path: &Path) -> Result<()> {
-    if ctx.dry_run {
-        return Ok(());
-    }
-
-    fs::OpenOptions::new()
-        .write(true)
-        .create(true)
-        .truncate(false)
-        .open(path)?;
-
-    Ok(())
-}
-
-// fails rather than writing over a file that is already there
-pub fn write_new(ctx: &Ctx, path: &Path, contents: &[u8]) -> Result<()> {
-    if ctx.dry_run {
-        return Ok(());
-    }
-
-    let mut file = fs::File::create_new(path)?;
-    file.write_all(contents)?;
-
-    Ok(())
-}
-
-// a restored path can leave the store holding nothing but empty directories
-pub fn prune_empty(ctx: &Ctx, dir: Option<&Path>, stop: &Path) {
-    if ctx.dry_run {
-        return;
-    }
-
-    let mut dir = dir;
-
-    while let Some(path) = dir {
-        if path == stop || !path.starts_with(stop) || fs::remove_dir(path).is_err() {
-            return;
-        }
-
-        dir = path.parent();
-    }
-}
-
 fn copy_recursive(src: &Path, target: &Path) -> Result<()> {
     let meta = fs::symlink_metadata(src)?;
 

src/project.rs

@@ -1,7 +1,7 @@
 use anyhow::{Context, Result, anyhow};
 use serde_json::Value;
 
-use crate::cmd::{Cmd, Config};
+use crate::cmd::Cmd;
 use crate::ctx::Ctx;
 
 const POSTGRES_IMAGES: [&str; 4] = ["postg", "timescale", "pgvector", "citus"];
@@ -13,7 +13,7 @@ pub struct Project {
 
 impl Project {
     pub fn resolve(ctx: &Ctx) -> Result<Self> {
-        let json = Config.capture(ctx)?;
+        let json = ctx.compose().config().capture(ctx)?;
         let config: Value = serde_json::from_str(&json).context("parsing docker compose config")?;
         let services = config
             .get("services")