gnu: codex, codex-acp: Drop file_lock patches; enable network-proxy.

* gnu/packages/patches/rust-codex-0.98.0-arg0-file-lock.patch,
gnu/packages/patches/rust-codex-0.98.0-core-file-lock.patch,
gnu/packages/patches/rust-codex-0.98.0-execpolicy-file-lock.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Unregister them.
* gnu/packages/rust-sources.scm (rust-codex-0.0.0.785c0c43)[source]<patches>:
Remove file-lock patches.
(rust-codex-0.98.0)[source]<patches>: Likewise.
[arguments]<#:cargo-package-crates>: Add
codex-network-proxy.
* gnu/packages/rust-apps.scm (codex)[source]<patches>: Remove file-lock
patches.
[arguments]<#:cargo-install-paths>: Add network-proxy.
<#:cargo-package-crates>: Add codex-network-proxy.
(codex-acp)[arguments]<#:rust>: Delete.
<#:cargo-test-flags>: Remove override.
* gnu/packages/patches/codex-0.98.0-remove-patch-sections.patch: Stop
excluding network-proxy from workspace members.

Change-Id: Iabc65a4ca2e8cc5801933a74a2b53b9bce404102

6 files changed, 12 insertions, 268 deletions

diff --git a/gnu/packages/patches/codex-0.98.0-remove-patch-sections.patch b/gnu/packages/patches/codex-0.98.0-remove-patch-sections.patch
index 34cd8bccf55..c54fe0b7fd2 100644
--- a/gnu/packages/patches/codex-0.98.0-remove-patch-sections.patch
+++ b/gnu/packages/patches/codex-0.98.0-remove-patch-sections.patch
@@ -2,28 +2,16 @@ Author: Danny Milosavljevic <dannym@friendly-machines.com>
 Date: 2026-02-08
 License: ASL2.0
 
-Remove [patch.crates-io] and [patch.'ssh://...'] sections and
-exclude network-proxy from workspace members.
+Remove [patch.crates-io] and [patch.'ssh://...'] sections.
 
 The [patch] sections point to git repositories which are unavailable
 in an offline build.  The vendored crossterm, ratatui,
 tokio-tungstenite and tungstenite forks are provided as cargo-inputs
 instead.
 
-The network-proxy workspace member depends on rama which requires
-Rust 1.91+.
-
 --- a/codex-rs/Cargo.toml
 +++ b/codex-rs/Cargo.toml
-@@ -28,7 +28,6 @@
-     "lmstudio",
-     "login",
-     "mcp-server",
--    "network-proxy",
-     "ollama",
-     "process-hardening",
-     "protocol",
-@@ -311,16 +310,3 @@
+@@ -311,16 +311,3 @@
  debug = 1         # Reduce debug symbol size
  inherits = "test"
  opt-level = 0
diff --git a/gnu/packages/patches/rust-codex-0.98.0-arg0-file-lock.patch b/gnu/packages/patches/rust-codex-0.98.0-arg0-file-lock.patch
deleted file mode 100644
index 62298d95725..00000000000
--- a/gnu/packages/patches/rust-codex-0.98.0-arg0-file-lock.patch
+++ /dev/null
@@ -1,89 +0,0 @@
-Author: Danny Milosavljevic <dannym@friendly-machines.com>
-Date: 2026-02-07
-License: ASL2.0
-Subject: Use libc::flock instead of unstable std File::try_lock().
-
-The file_lock feature is tracked at <https://github.com/rust-lang/rust/issues/130994>
-and is not yet stable in old Rust versions like Rust 1.88.
-
-diff -ruN a/codex-rs/arg0/Cargo.toml b/codex-rs/arg0/Cargo.toml
---- a/codex-rs/arg0/Cargo.toml
-+++ b/codex-rs/arg0/Cargo.toml
-@@ -17,5 +17,6 @@
- codex-core = { workspace = true }
- codex-linux-sandbox = { workspace = true }
- dotenvy = { workspace = true }
-+libc = { workspace = true }
- tempfile = { workspace = true }
- tokio = { workspace = true, features = ["rt-multi-thread"] }
-diff -ruN a/codex-rs/arg0/src/lib.rs b/codex-rs/arg0/src/lib.rs
---- a/codex-rs/arg0/src/lib.rs
-+++ b/codex-rs/arg0/src/lib.rs
-@@ -5,6 +5,8 @@
-
- use codex_core::CODEX_APPLY_PATCH_ARG1;
- #[cfg(unix)]
-+use std::os::unix::io::AsRawFd;
-+#[cfg(unix)]
- use std::os::unix::fs::symlink;
- use tempfile::TempDir;
-
-@@ -13,6 +15,18 @@
- const MISSPELLED_APPLY_PATCH_ARG0: &str = "applypatch";
- const LOCK_FILENAME: &str = ".lock";
-
-+// FIXME: Remove this helper when Rust provides stable file locking API.
-+// The file_lock feature is tracked at <https://github.com/rust-lang/rust/issues/130994>.
-+#[cfg(unix)]
-+fn try_lock_exclusive(file: &File) -> std::io::Result<()> {
-+    let ret = unsafe { libc::flock(file.as_raw_fd(), libc::LOCK_EX | libc::LOCK_NB) };
-+    if ret == 0 {
-+        Ok(())
-+    } else {
-+        Err(std::io::Error::last_os_error())
-+    }
-+}
-+
- /// Keeps the per-session PATH entry alive and locked for the process lifetime.
- pub struct Arg0PathEntryGuard {
-     _temp_dir: TempDir,
-@@ -216,7 +230,7 @@
-         .create(true)
-         .truncate(false)
-         .open(&lock_path)?;
--    lock_file.try_lock()?;
-+    try_lock_exclusive(&lock_file)?;
-
-     for filename in &[
-         APPLY_PATCH_ARG0,
-@@ -307,10 +321,10 @@
-         Err(err) => return Err(err),
-     };
-
--    match lock_file.try_lock() {
-+    match try_lock_exclusive(&lock_file) {
-         Ok(()) => Ok(Some(lock_file)),
--        Err(std::fs::TryLockError::WouldBlock) => Ok(None),
--        Err(err) => Err(err.into()),
-+        Err(ref e) if e.raw_os_error() == Some(libc::EWOULDBLOCK) => Ok(None),
-+        Err(err) => Err(err),
-     }
- }
-
-@@ -318,6 +332,7 @@
- mod tests {
-     use super::LOCK_FILENAME;
-     use super::janitor_cleanup;
-+    use super::try_lock_exclusive;
-     use std::fs;
-     use std::fs::File;
-     use std::path::Path;
-@@ -350,7 +365,7 @@
-         let dir = root.path().join("locked");
-         fs::create_dir(&dir)?;
-         let lock_file = create_lock(&dir)?;
--        lock_file.try_lock()?;
-+        try_lock_exclusive(&lock_file)?;
-
-         janitor_cleanup(root.path())?;
-
diff --git a/gnu/packages/patches/rust-codex-0.98.0-core-file-lock.patch b/gnu/packages/patches/rust-codex-0.98.0-core-file-lock.patch
deleted file mode 100644
index ee53f7e2772..00000000000
--- a/gnu/packages/patches/rust-codex-0.98.0-core-file-lock.patch
+++ /dev/null
@@ -1,91 +0,0 @@
-Author: Danny Milosavljevic <dannym@friendly-machines.com>
-Date: 2026-01-25
-License: ASL2.0
-Subject: Use libc::flock instead of unstable std File::try_lock()/try_lock_shared().
-
-The file_lock feature is tracked at <https://github.com/rust-lang/rust/issues/130994>.
-and is not yet stable in old Rust versions like Rust 1.85.
-
-The file_lock feature was stabilized after Rust 1.88, but we only have 1.88.
-
-diff -u a/codex-rs/core/src/message_history.rs b/codex-rs/core/src/message_history.rs
---- a/codex-rs/core/src/message_history.rs
-+++ b/codex-rs/core/src/message_history.rs
-@@ -41,6 +41,8 @@
- use std::os::unix::fs::OpenOptionsExt;
- #[cfg(unix)]
- use std::os::unix::fs::PermissionsExt;
-+#[cfg(unix)]
-+use std::os::unix::io::AsRawFd;
-
- /// Filename that stores the message history inside `~/.codex`.
- const HISTORY_FILENAME: &str = "history.jsonl";
-@@ -51,6 +53,28 @@
- const MAX_RETRIES: usize = 10;
- const RETRY_SLEEP: Duration = Duration::from_millis(100);
-
-+// FIXME: Remove these helpers when Rust provides stable file locking API
-+// The file_lock feature is tracked at <https://github.com/rust-lang/rust/issues/130994>.
-+#[cfg(unix)]
-+fn try_lock_exclusive(file: &File) -> std::io::Result<()> {
-+    let ret = unsafe { libc::flock(file.as_raw_fd(), libc::LOCK_EX | libc::LOCK_NB) };
-+    if ret == 0 {
-+        Ok(())
-+    } else {
-+        Err(std::io::Error::last_os_error())
-+    }
-+}
-+
-+#[cfg(unix)]
-+fn try_lock_shared(file: &File) -> std::io::Result<()> {
-+    let ret = unsafe { libc::flock(file.as_raw_fd(), libc::LOCK_SH | libc::LOCK_NB) };
-+    if ret == 0 {
-+        Ok(())
-+    } else {
-+        Err(std::io::Error::last_os_error())
-+    }
-+}
-+
- #[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
- pub struct HistoryEntry {
-     pub session_id: String,
-@@ -126,7 +150,7 @@
-     tokio::task::spawn_blocking(move || -> Result<()> {
-         // Retry a few times to avoid indefinite blocking when contended.
-         for _ in 0..MAX_RETRIES {
--            match history_file.try_lock() {
-+            match try_lock_exclusive(&history_file) {
-                 Ok(()) => {
-                     // While holding the exclusive lock, write the full line.
-                     // We do not open the file with `append(true)` on Windows, so ensure the
-@@ -137,10 +161,10 @@
-                     enforce_history_limit(&mut history_file, history_max_bytes)?;
-                     return Ok(());
-                 }
--                Err(std::fs::TryLockError::WouldBlock) => {
-+                Err(ref e) if e.kind() == std::io::ErrorKind::WouldBlock => {
-                     std::thread::sleep(RETRY_SLEEP);
-                 }
--                Err(e) => return Err(e.into()),
-+                Err(e) => return Err(e),
-             }
-         }
-
-@@ -341,7 +365,7 @@
-     // Open & lock file for reading using a shared lock.
-     // Retry a few times to avoid indefinite blocking.
-     for _ in 0..MAX_RETRIES {
--        let lock_result = file.try_lock_shared();
-+        let lock_result = try_lock_shared(&file);
-
-         match lock_result {
-             Ok(()) => {
-@@ -368,7 +392,7 @@
-                 // Not found at requested offset.
-                 return None;
-             }
--            Err(std::fs::TryLockError::WouldBlock) => {
-+            Err(ref e) if e.kind() == std::io::ErrorKind::WouldBlock => {
-                 std::thread::sleep(RETRY_SLEEP);
-             }
-             Err(e) => {
diff --git a/gnu/packages/patches/rust-codex-0.98.0-execpolicy-file-lock.patch b/gnu/packages/patches/rust-codex-0.98.0-execpolicy-file-lock.patch
deleted file mode 100644
index 10b8b37c5c3..00000000000
--- a/gnu/packages/patches/rust-codex-0.98.0-execpolicy-file-lock.patch
+++ /dev/null
@@ -1,49 +0,0 @@
-Author: Danny Milosavljevic <dannym@friendly-machines.com>
-Date: 2026-01-25
-License: ASL2.0
-Subject: Use libc::flock instead of unstable std File::lock().
-
-The file_lock feature is tracked at <https://github.com/rust-lang/rust/issues/130994>.
-and is not yet stable in old Rust versions like Rust 1.85.
-
-The file_lock feature was stabilized after Rust 1.88, but we only have 1.88.
-
-diff -u a/codex-rs/execpolicy/Cargo.toml b/codex-rs/execpolicy/Cargo.toml
---- a/codex-rs/execpolicy/Cargo.toml
-+++ b/codex-rs/execpolicy/Cargo.toml
-@@ -19,6 +19,7 @@
- [dependencies]
- anyhow = { workspace = true }
- clap = { workspace = true, features = ["derive"] }
-+libc = { workspace = true }
- multimap = { workspace = true }
- serde = { workspace = true, features = ["derive"] }
- serde_json = { workspace = true }
-diff -u a/codex-rs/execpolicy/src/amend.rs b/codex-rs/execpolicy/src/amend.rs
---- a/codex-rs/execpolicy/src/amend.rs
-+++ b/codex-rs/execpolicy/src/amend.rs
-@@ -1,4 +1,5 @@
- use std::fs::OpenOptions;
-+use std::os::unix::io::AsRawFd;
- use std::io::Read;
- use std::io::Seek;
- use std::io::SeekFrom;
-@@ -100,10 +101,14 @@
-             path: policy_path.to_path_buf(),
-             source,
-         })?;
--    file.lock().map_err(|source| AmendError::LockPolicyFile {
--        path: policy_path.to_path_buf(),
--        source,
--    })?;
-+    // FIXME: Use file.lock() when Rust 1.91 is available
-+    let ret = unsafe { libc::flock(file.as_raw_fd(), libc::LOCK_EX) };
-+    if ret != 0 {
-+        return Err(AmendError::LockPolicyFile {
-+            path: policy_path.to_path_buf(),
-+            source: std::io::Error::last_os_error(),
-+        });
-+    }
-
-     let len = file
-         .metadata()
diff --git a/gnu/packages/rust-apps.scm b/gnu/packages/rust-apps.scm
index fadc8dfa71c..827e778c938 100644
--- a/gnu/packages/rust-apps.scm
+++ b/gnu/packages/rust-apps.scm
@@ -845,9 +845,6 @@ Commit and SemVer specifications.")
      (origin
        (inherit (package-source rust-codex-0.98.0))
        (patches (search-patches
-                 "rust-codex-0.98.0-execpolicy-file-lock.patch"
-                 "rust-codex-0.98.0-core-file-lock.patch"
-                 "rust-codex-0.98.0-arg0-file-lock.patch"
                  "codex-0.98.0-remove-patch-sections.patch"
                  "rust-codex-0.98.0-test-shebangs.patch"
                  "rust-codex-0.98.0-test-timeout.patch"))))
@@ -856,7 +853,7 @@ Commit and SemVer specifications.")
      (list
       #:install-source? #f
       #:cargo-install-paths '(list "cli" "exec" "exec-server"
-                                   "linux-sandbox" "mcp-server"
+                                   "linux-sandbox" "mcp-server" "network-proxy"
                                    "app-server" "tui")
       ;; schema_fixtures_match_generated (upstream fixture is stale:
       ;; FileChange::Update in codex-protocol gained old_content,
@@ -1042,7 +1039,7 @@ Commit and SemVer specifications.")
          "codex-exec"
          "codex-exec-server"
          "codex-stdio-to-uds"
-         ;; codex-network-proxy requires rama which needs Rust 1.91+.
+         "codex-network-proxy"
          "codex-chatgpt"
          "codex-cloud-tasks-client"
          ;;; Tier 5.
@@ -1148,7 +1145,10 @@ Commit and SemVer specifications.")
             (lambda _
               (setenv "HOME" "/tmp")
               (setenv "USER" "nixbld"))))))
-    (native-inputs (list perl python-minimal  ;for tests
+    (native-inputs (list clang              ;bindgen uses libclang to parse BoringSSL's C headers
+                         cmake-minimal    ;BoringSSL is compiled from C source
+                         libunwind        ;BoringSSL tests verify stack unwinding in assembly
+                         perl python-minimal ;for tests
                          pkg-config))
     (inputs (cons* bash-minimal coreutils git-minimal sed
                    openssl sqlite `(,zstd "lib")
@@ -1180,11 +1180,7 @@ Configure providers via @file{~/.codex/config.toml}.")
     (build-system cargo-build-system)
     (arguments
      (list
-      #:rust rust-1.88
       #:install-source? #f
-      ;; Skip doctests (--doc) because rustdoc is unavailable for non-default
-      ;; Rust versions in Guix.
-      #:cargo-test-flags '(list "--lib" "--bins" "--tests")
       #:phases
       #~(modify-phases %standard-phases
           (add-after 'unpack 'patch-codex-deps
diff --git a/gnu/packages/rust-sources.scm b/gnu/packages/rust-sources.scm
index c4e2c2685d2..93ddee042a4 100644
--- a/gnu/packages/rust-sources.scm
+++ b/gnu/packages/rust-sources.scm
@@ -728,13 +728,7 @@ intelligence.")
           (file-name (git-file-name name version))
           (sha256
            (base32 "0rwj1ykknng39mhzna3fw3rcl3vngynsjdcj1namgkvw91zd9dl7"))
-          ;; TODO: Remove patches when Rust provides stable file locking API.
-          ;; The file_lock feature is tracked at
-          ;; <https://github.com/rust-lang/rust/issues/130994>.
-          (patches (search-patches "rust-codex-0.98.0-execpolicy-file-lock.patch"
-                                   "rust-codex-0.98.0-core-file-lock.patch"
-                                   "rust-codex-0.98.0-arg0-file-lock.patch"
-                                   "rust-codex-0.98.0-core-remove-self-dep.patch"))))
+          (patches (search-patches "rust-codex-0.98.0-core-remove-self-dep.patch"))))
        (build-system cargo-build-system)
        (arguments
         (list
@@ -832,9 +826,6 @@ and runtime for AI-assisted coding.")
         (file-name (git-file-name name version))
         (sha256
          (base32 "1mn322gbir4gn4y5jihdqg0wprjlnx771chyfmmm7ri7pnim1zmc"))
-        ;; TODO: Remove patches when Rust provides stable file locking API.
-        ;; The file_lock feature is tracked at
-        ;; <https://github.com/rust-lang/rust/issues/130994>.
         (modules '((guix build utils)))
         (snippet '(begin
                     ;;; These are JSON manifests with a dotslash
@@ -845,10 +836,7 @@ and runtime for AI-assisted coding.")
                     ;; Bundled bubblewrap source tree; includes a
                     ;; compiled BPF blob (demos/flatpak.bpf).
                     (delete-file-recursively "codex-rs/vendor/bubblewrap")))
-        (patches (search-patches "rust-codex-0.98.0-execpolicy-file-lock.patch"
-                                 "rust-codex-0.98.0-core-file-lock.patch"
-                                 "rust-codex-0.98.0-arg0-file-lock.patch"
-                                 "rust-codex-0.98.0-core-remove-self-dep.patch"
+        (patches (search-patches "rust-codex-0.98.0-core-remove-self-dep.patch"
                                  "rust-codex-0.98.0-windows-sandbox-protocol-version.patch"
                                  "rust-codex-0.98.0-test-shebangs.patch"))))
      (build-system cargo-build-system)
@@ -888,7 +876,8 @@ and runtime for AI-assisted coding.")
           "codex-login"              ; Depends on codex-core
           "codex-ollama"             ; Depends on codex-core
           "codex-common"             ; Depends on codex-core, codex-lmstudio, codex-ollama
-          "codex-mcp-server")         ; Depends on codex-core, codex-common
+          "codex-mcp-server"          ; Depends on codex-core, codex-common
+          "codex-network-proxy")      ; Depends on codex-core, rama
        #:phases
        #~(modify-phases %standard-phases
           (add-after 'unpack 'chdir-to-workspace