Merge bitcoin/bitcoin#29228: test: Remove all-lint.py script

fa2b95c test: Remove all-lint.py script (MarcoFalke)
fadb06c doc: move-only lint docs to one place (MarcoFalke)

Pull request description:

  Seems confusing to have a test runner that calls another runner (`all-lint.py`), which calls a subset of the lint tests.

  Fix that by just calling this subset of lint tests in the test runner directly, and remove the now unused `all-lint.py`.

  To run all lint checks locally, refer to the documentation: https://github.com/bitcoin/bitcoin/blob/master/test/lint/README.md#running-locally

ACKs for top commit:
  kevkevinpal:
    ACK [fa2b95c](bitcoin/bitcoin@fa2b95c)
  achow101:
    ACK fa2b95c
  TheCharlatan:
    ACK fa2b95c
  pablomartin4btc:
    tACK fa2b95c
  brunoerg:
    utACK fa2b95c

Tree-SHA512: 43fac9acb4e9a6744d695dd49c7202e19ab4bf480f4cccff768647d0157a065f40e6ad70b9f6a65ba42048cc5fa9834365aa8e7aa0ed64c09e0cd4eb8dccb831

Author: achow101

test/README.md

@@ -326,35 +326,7 @@ Use the `-v` option for verbose output.
 
 ### Lint tests
 
-#### Dependencies
-
-| Lint test | Dependency |
-|-----------|:----------:|
-| [`lint-python.py`](lint/lint-python.py) | [flake8](https://gitlab.com/pycqa/flake8)
-| [`lint-python.py`](lint/lint-python.py) | [lief](https://github.com/lief-project/LIEF)
-| [`lint-python.py`](lint/lint-python.py) | [mypy](https://github.com/python/mypy)
-| [`lint-python.py`](lint/lint-python.py) | [pyzmq](https://github.com/zeromq/pyzmq)
-| [`lint-python-dead-code.py`](lint/lint-python-dead-code.py) | [vulture](https://github.com/jendrikseipp/vulture)
-| [`lint-shell.py`](lint/lint-shell.py) | [ShellCheck](https://github.com/koalaman/shellcheck)
-| [`lint-spelling.py`](lint/lint-spelling.py) | [codespell](https://github.com/codespell-project/codespell)
-
-In use versions and install instructions are available in the [CI setup](../ci/lint/04_install.sh).
-
-Please be aware that on Linux distributions all dependencies are usually available as packages, but could be outdated.
-
-#### Running the tests
-
-Individual tests can be run by directly calling the test script, e.g.:
-
-```
-test/lint/lint-files.py
-```
-
-You can run all the shell-based lint tests by running:
-
-```
-test/lint/all-lint.py
-```
+See the README in [test/lint](/test/lint).
 
 # Writing functional tests
 

test/lint/README.md

@@ -16,12 +16,36 @@ result is cached and it prevents issues when the image changes.
 test runner
 ===========
 
-To run the checks in the test runner outside the docker, use:
+To run all the lint checks in the test runner outside the docker, use:
 
 ```sh
 ( cd ./test/lint/test_runner/ && cargo fmt && cargo clippy && cargo run )
 ```
 
+#### Dependencies
+
+| Lint test | Dependency |
+|-----------|:----------:|
+| [`lint-python.py`](lint/lint-python.py) | [flake8](https://gitlab.com/pycqa/flake8)
+| [`lint-python.py`](lint/lint-python.py) | [lief](https://github.com/lief-project/LIEF)
+| [`lint-python.py`](lint/lint-python.py) | [mypy](https://github.com/python/mypy)
+| [`lint-python.py`](lint/lint-python.py) | [pyzmq](https://github.com/zeromq/pyzmq)
+| [`lint-python-dead-code.py`](lint/lint-python-dead-code.py) | [vulture](https://github.com/jendrikseipp/vulture)
+| [`lint-shell.py`](lint/lint-shell.py) | [ShellCheck](https://github.com/koalaman/shellcheck)
+| [`lint-spelling.py`](lint/lint-spelling.py) | [codespell](https://github.com/codespell-project/codespell)
+
+In use versions and install instructions are available in the [CI setup](../ci/lint/04_install.sh).
+
+Please be aware that on Linux distributions all dependencies are usually available as packages, but could be outdated.
+
+#### Running the tests
+
+Individual tests can be run by directly calling the test script, e.g.:
+
+```
+test/lint/lint-files.py
+```
+
 check-doc.py
 ============
 Check for missing documentation of command line options.
@@ -59,7 +83,3 @@ To do so, add the upstream repository as remote:
 ```
 git remote add --fetch secp256k1 https://github.com/bitcoin-core/secp256k1.git
 ```
-
-all-lint.py
-===========
-Calls other scripts with the `lint-` prefix.

test/lint/all-lint.py

@@ -3,6 +3,7 @@
 // file COPYING or https://opensource.org/license/mit/.
 
 use std::env;
+use std::fs;
 use std::path::PathBuf;
 use std::process::Command;
 use std::process::ExitCode;
@@ -29,8 +30,8 @@ fn check_output(cmd: &mut std::process::Command) -> Result<String, LintError> {
 }
 
 /// Return the git root as utf8, or panic
-fn get_git_root() -> String {
-    check_output(git().args(["rev-parse", "--show-toplevel"])).unwrap()
+fn get_git_root() -> PathBuf {
+    PathBuf::from(check_output(git().args(["rev-parse", "--show-toplevel"])).unwrap())
 }
 
 fn lint_subtree() -> LintResult {
@@ -94,11 +95,24 @@ fn lint_doc() -> LintResult {
 }
 
 fn lint_all() -> LintResult {
-    if Command::new("test/lint/all-lint.py")
-        .status()
-        .expect("command error")
-        .success()
-    {
+    let mut good = true;
+    let lint_dir = get_git_root().join("test/lint");
+    for entry in fs::read_dir(lint_dir).unwrap() {
+        let entry = entry.unwrap();
+        let entry_fn = entry.file_name().into_string().unwrap();
+        if entry_fn.starts_with("lint-")
+            && entry_fn.ends_with(".py")
+            && !Command::new("python3")
+                .arg(entry.path())
+                .status()
+                .expect("command error")
+                .success()
+        {
+            good = false;
+            println!("^---- failure generated from {}", entry_fn);
+        }
+    }
+    if good {
         Ok(())
     } else {
         Err("".to_string())
@@ -110,10 +124,10 @@ fn main() -> ExitCode {
         ("subtree check", lint_subtree),
         ("std::filesystem check", lint_std_filesystem),
         ("-help=1 documentation check", lint_doc),
-        ("all-lint.py script", lint_all),
+        ("lint-*.py scripts", lint_all),
     ];
 
-    let git_root = PathBuf::from(get_git_root());
+    let git_root = get_git_root();
 
     let mut test_failed = false;
     for (lint_name, lint_fn) in test_list {