feat: add write_aspect_bazelrc_presets macro

.aspect/bazelrc/BUILD.bazel

@@ -1 +1,27 @@
-exports_files(glob(["*.bazelrc"]))
+load("@aspect_bazel_lib//lib:write_source_files.bzl", "write_source_file")
+
+exports_files(glob([
+    "*.bazelrc",
+    "*.md",
+]))
+
+# `usage.md` & `intro.md` are also used for [docsite](https://docs.aspect.build/guides/bazelrc)
+# content which is why they are separated into individual md files
+genrule(
+    name = "gen_readme_md",
+    srcs = glob(["*.md"]),
+    outs = ["_README.md"],
+    cmd = """
+      cat .aspect/bazelrc/intro.md > $@
+      echo '' >> $@
+      cat .aspect/bazelrc/usage.md >> $@
+      echo '' >> $@
+      cat .aspect/bazelrc/automatic_updates.md >> $@
+    """,
+)
+
+write_source_file(
+    name = "update_readme_md",
+    in_file = "_README.md",
+    out_file = "README.md",
+)

.aspect/bazelrc/README.md

@@ -1,4 +1,56 @@
-# Aspect Recommended Bazel Options
+# Aspect bazelrc presets
+
+The `.bazelrc` files found here are the source-of-truth for our recommended Bazel presets.
 
-The Bazel options found here are the source-of-truth for our recommended set of settings.
 They are mirrored on our docsite at https://docs.aspect.build/guides/bazelrc.
+
+## Using Aspect bazelrc presets in your project
+
+The `.bazelrc` file can get large, fast.
+Some settings don't apply everywhere - some options are appropriate only on CI,
+and some vary depending on the version of Bazel you use or languages used.
+
+Bazel rc files can contain `import` statements, which allow you to organize the content better.
+
+To use these presets in your project, simply vendor the `*.bazelrc` files from
+https://github.com/aspect-build/bazel-lib/tree/main/.aspect/bazelrc into the
+`.aspect/bazelrc` folder in your repository and `import` them in your `.bazelrc` file.
+
+For example,
+
+```python title=".bazelrc"
+# Import Aspect bazelrc presets
+import %workspace%/.aspect/bazelrc/bazel6.bazelrc
+import %workspace%/.aspect/bazelrc/convenience.bazelrc
+import %workspace%/.aspect/bazelrc/correctness.bazelrc
+import %workspace%/.aspect/bazelrc/debug.bazelrc
+import %workspace%/.aspect/bazelrc/javascript.bazelrc
+import %workspace%/.aspect/bazelrc/performance.bazelrc
+
+### YOUR PROJECT SPECIFIC OPTIONS GO HERE ###
+
+# Load any settings & overrides specific to the current user from `.aspect/bazelrc/user.bazelrc`.
+# This file should appear in `.gitignore` so that settings are not shared with team members. This
+# should be last statement in this config so the user configuration is able to overwrite flags from
+# this file. See https://bazel.build/configure/best-practices#bazelrc-file.
+try-import %workspace%/.aspect/bazelrc/user.bazelrc
+```
+
+## Automatic updates
+
+A convenient way to automatically keep your vendored copy up-to-date is to use the `write_aspect_bazelrc_presets` rule in `.aspect/bazelrc/BUILD.bazel`:
+
+```python title=".aspect/bazelrc/BUILD.bazel"
+"Aspect bazelrc presets; see https://docs.aspect.build/guides/bazelrc"
+
+load("@aspect_bazel_lib//lib:bazelrc_presets.bzl", "write_aspect_bazelrc_presets")
+
+write_aspect_bazelrc_presets(name = "update_aspect_bazelrc_presets")
+```
+
+When `@aspect_bazel_lib` is upgraded in your `WORKSPACE.bazel` or your `MODULE.bazel` file, a `diff_test`
+stamped out by `write_aspect_bazelrc_presets` will fail if your vendored copy is out-of-date and print the Bazel command
+to run to update it. For example, `bazel run //.aspect/bazelrc:update_aspect_bazelrc_presets`.
+
+See the [bazelrc](https://github.com/aspect-build/bazel-examples/blob/main/bazelrc/.aspect/bazelrc/BUILD.bazel) example
+in our [bazel-examples](https://github.com/aspect-build/bazel-examples) repository for a working example.

.aspect/bazelrc/automatic_updates.md

@@ -0,0 +1,18 @@
+## Automatic updates
+
+A convenient way to automatically keep your vendored copy up-to-date is to use the `write_aspect_bazelrc_presets` rule in `.aspect/bazelrc/BUILD.bazel`:
+
+```python title=".aspect/bazelrc/BUILD.bazel"
+"Aspect bazelrc presets; see https://docs.aspect.build/guides/bazelrc"
+
+load("@aspect_bazel_lib//lib:bazelrc_presets.bzl", "write_aspect_bazelrc_presets")
+
+write_aspect_bazelrc_presets(name = "update_aspect_bazelrc_presets")
+```
+
+When `@aspect_bazel_lib` is upgraded in your `WORKSPACE.bazel` or your `MODULE.bazel` file, a `diff_test`
+stamped out by `write_aspect_bazelrc_presets` will fail if your vendored copy is out-of-date and print the Bazel command
+to run to update it. For example, `bazel run //.aspect/bazelrc:update_aspect_bazelrc_presets`.
+
+See the [bazelrc](https://github.com/aspect-build/bazel-examples/blob/main/bazelrc/.aspect/bazelrc/BUILD.bazel) example
+in our [bazel-examples](https://github.com/aspect-build/bazel-examples) repository for a working example.

.aspect/bazelrc/intro.md

@@ -0,0 +1,5 @@
+# Aspect bazelrc presets
+
+The `.bazelrc` files found here are the source-of-truth for our recommended Bazel presets.
+
+They are mirrored on our docsite at https://docs.aspect.build/guides/bazelrc.

.aspect/bazelrc/usage.md

@@ -0,0 +1,31 @@
+## Using Aspect bazelrc presets in your project
+
+The `.bazelrc` file can get large, fast.
+Some settings don't apply everywhere - some options are appropriate only on CI,
+and some vary depending on the version of Bazel you use or languages used.
+
+Bazel rc files can contain `import` statements, which allow you to organize the content better.
+
+To use these presets in your project, simply vendor the `*.bazelrc` files from
+https://github.com/aspect-build/bazel-lib/tree/main/.aspect/bazelrc into the
+`.aspect/bazelrc` folder in your repository and `import` them in your `.bazelrc` file.
+
+For example,
+
+```python title=".bazelrc"
+# Import Aspect bazelrc presets
+import %workspace%/.aspect/bazelrc/bazel6.bazelrc
+import %workspace%/.aspect/bazelrc/convenience.bazelrc
+import %workspace%/.aspect/bazelrc/correctness.bazelrc
+import %workspace%/.aspect/bazelrc/debug.bazelrc
+import %workspace%/.aspect/bazelrc/javascript.bazelrc
+import %workspace%/.aspect/bazelrc/performance.bazelrc
+
+### YOUR PROJECT SPECIFIC OPTIONS GO HERE ###
+
+# Load any settings & overrides specific to the current user from `.aspect/bazelrc/user.bazelrc`.
+# This file should appear in `.gitignore` so that settings are not shared with team members. This
+# should be last statement in this config so the user configuration is able to overwrite flags from
+# this file. See https://bazel.build/configure/best-practices#bazelrc-file.
+try-import %workspace%/.aspect/bazelrc/user.bazelrc
+```

.bazelrc

@@ -1,25 +1,18 @@
 # Bazel settings that apply to this repository.
 # Settings that apply only to CI are in .aspect/bazelrc/ci.bazelrc
 
-# Import Aspect recommended Bazel convenience settings for all projects
+# Import Aspect bazelrc presets
 import %workspace%/.aspect/bazelrc/convenience.bazelrc
-
-# Import Aspect recommended Bazel correctness settings for all projects
 import %workspace%/.aspect/bazelrc/correctness.bazelrc
-
-# Import Aspect recommended Bazel performance settings for all projects
 import %workspace%/.aspect/bazelrc/performance.bazelrc
-
-# Import Aspect recommended Bazel debug settings for all projects
 import %workspace%/.aspect/bazelrc/debug.bazelrc
-
-# Import Aspect recommended Bazel javascript settings for all projects
 import %workspace%/.aspect/bazelrc/javascript.bazelrc
 
-# Import Aspect recommended Bazel 6 settings for all projects;
-# using a try-import here since this repository is also tested against Bazel 5 on CI
+# Use a try-import for Bazel 6 settings since this repository is also tested against Bazel 5 on CI
 try-import %workspace%/.aspect/bazelrc/bazel6.bazelrc
 
+### PROJECT SPECIFIC OPTIONS ###
+
 # For testing our --stamp behavior.
 # Normally users would use a --workspace_status_command with a script that calls `git describe`.
 build --embed_label=v1.2.3

docs/BUILD.bazel

@@ -128,4 +128,9 @@ stardoc_with_diff_test(
     bzl_library_target = "//lib:repositories",
 )
 
+stardoc_with_diff_test(
+    name = "bazelrc_presets",
+    bzl_library_target = "//lib:bazelrc_presets",
+)
+
 update_docs()

e2e/bzlmod/.bazelignore

@@ -0,0 +1 @@
+e2e/bzlmod/.aspect/bazelrc

e2e/copy_to_directory/.bazelignore

@@ -0,0 +1 @@
+e2e/bzlmod/.aspect/bazelrc

e2e/workspace/.bazelignore

@@ -0,0 +1 @@
+e2e/bzlmod/.aspect/bazelrc

lib/BUILD.bazel

@@ -230,3 +230,9 @@ bzl_library(
     srcs = ["base64.bzl"],
     deps = ["//lib/private/docs:base64"],
 )
+
+bzl_library(
+    name = "bazelrc_presets",
+    srcs = ["bazelrc_presets.bzl"],
+    deps = [":write_source_files"],
+)

lib/bazelrc_presets.bzl

@@ -0,0 +1,59 @@
+"Aspect bazelrc presets; see https://docs.aspect.build/guides/bazelrc"
+
+load("@aspect_bazel_lib//lib:write_source_files.bzl", "write_source_files")
+
+ALL_PRESETS = [
+    "bazel5",
+    "bazel6",
+    "ci",
+    "convenience",
+    "correctness",
+    "debug",
+    "javascript",
+    "performance",
+]
+
+def write_aspect_bazelrc_presets(
+        name,
+        presets = ALL_PRESETS):
+    """Keeps your vendored copy of Aspect recommended `.bazelrc` presets up-to-date.
+
+    This macro uses a [write_source_files](https://docs.aspect.build/rules/aspect_bazel_lib/docs/write_source_files)
+    rule under the hood to keep your presets up-to-date.
+
+    By default all presets are vendored but this list can be customized using
+    the 'presets' attribute.
+
+    See https://docs.aspect.build/guides/bazelrc for more info.
+
+    Args:
+        name: a unique name for this target
+
+        presets: a list of preset names to keep up-to-date
+
+          For example,
+
+          ```
+          write_aspect_bazelrc_presets(
+            name = "update_aspect_bazelrc_presets",
+            presets = [
+              "bazel6",
+              "ci",
+              "convenience",
+              "correctness",
+              "debug",
+              "javascript",
+              "performance",
+            ],
+          )
+          ```
+    """
+
+    files = {}
+    for p in presets:
+        files["{}.bazelrc".format(p)] = "@aspect_bazel_lib//.aspect/bazelrc:{}.bazelrc".format(p)
+
+    write_source_files(
+        name = name,
+        files = files,
+    )

lib/tests/bazelrc_presets/BUILD.bazel

@@ -0,0 +1,5 @@
+"Aspect bazelrc presets; see https://docs.aspect.build/guides/bazelrc"
+
+load("@aspect_bazel_lib//lib:bazelrc_presets.bzl", "write_aspect_bazelrc_presets")
+
+write_aspect_bazelrc_presets(name = "update_aspect_bazelrc_presets")

lib/tests/bazelrc_presets/bazel5.bazelrc

@@ -0,0 +1,5 @@
+# Performance improvement for WORKSPACE evaluation
+# of slow rulesets, for example rules_k8s has been
+# observed to take 10 seconds without this flag.
+# See https://github.com/bazelbuild/bazel/issues/13907
+common --incompatible_existing_rules_immutable_view

lib/tests/bazelrc_presets/bazel6.bazelrc

@@ -0,0 +1,15 @@
+# Speed up all builds by not checking if external repository files have been modified.
+# Docs: https://github.com/bazelbuild/bazel/blob/1af61b21df99edc2fc66939cdf14449c2661f873/src/main/java/com/google/devtools/build/lib/bazel/repository/RepositoryOptions.java#L244
+build --noexperimental_check_external_repository_files
+fetch --noexperimental_check_external_repository_files
+query --noexperimental_check_external_repository_files
+
+# Directories used by sandboxed non-worker execution may be reused to avoid unnecessary setup costs.
+# Save time on Sandbox creation and deletion when many of the same kind of action run during the
+# build.
+# Docs: https://bazel.build/reference/command-line-reference#flag--reuse_sandbox_directories
+build --reuse_sandbox_directories
+
+# Avoid this flag being enabled by remote_download_minimal or remote_download_toplevel
+# See https://meroton.com/blog/bazel-6-errors-build-without-the-bytes/
+build --noexperimental_action_cache_store_output_metadata

lib/tests/bazelrc_presets/ci.bazelrc

@@ -0,0 +1,75 @@
+# We recommend enforcing a policy that keeps your CI from being slowed down
+# by individual test targets that should be optimized
+# or split up into multiple test targets with sharding or manually.
+# Set this flag to exclude targets that have their timeout set to eternal (>15m) from running on CI.
+# Docs: https://bazel.build/docs/user-manual#test-timeout-filters
+build --test_timeout_filters=-eternal
+
+# Set this flag to enable re-tries of failed tests on CI.
+# When any test target fails, try one or more times. This applies regardless of whether the "flaky"
+# tag appears on the target definition.
+# This is a tradeoff: legitimately failing tests will take longer to report,
+# but we can paper over flaky tests that pass most of the time.
+# The alternative is to mark every flaky test with the `flaky = True` attribute, but this requires
+# the buildcop to make frequent code edits.
+# Not recommended for local builds so that the flakiness is observed during development and thus
+# is more likely to get fixed.
+# Note that when passing after the first attempt, Bazel will give a special "FLAKY" status.
+# Docs: https://bazel.build/docs/user-manual#flaky-test-attempts
+build --flaky_test_attempts=2
+
+# Announce all announces command options read from the bazelrc file(s) when starting up at the
+# beginning of each Bazel invocation. This is very useful on CI to be able to inspect what Bazel rc
+# settings are being applied on each run.
+# Docs: https://bazel.build/docs/user-manual#announce-rc
+build --announce_rc
+
+# Add a timestamp to each message generated by Bazel specifying the time at which the message was
+# displayed.
+# Docs: https://bazel.build/docs/user-manual#show-timestamps
+build --show_timestamps
+
+# Only show progress every 60 seconds on CI.
+# Docs: https://bazel.build/reference/command-line-reference#flag--progress_report_interval
+build --progress_report_interval=60
+
+# Only show progress every 60 seconds on CI.
+# https://bazel.build/reference/command-line-reference#flag--show_progress_rate_limit
+build --show_progress_rate_limit=60
+
+# Don't use cursor controls in its screen output.
+# Docs: https://bazel.build/docs/user-manual#curses
+build --curses=no
+
+# Use colors to highlight its output on the screen. Set to `no` if your CI does not display colors.
+# Docs: https://bazel.build/docs/user-manual#color
+build --color=yes
+
+# The terminal width in columns. Configure this to override the default value based on what your CI system renders.
+# Docs: https://github.com/bazelbuild/bazel/blob/1af61b21df99edc2fc66939cdf14449c2661f873/src/main/java/com/google/devtools/build/lib/runtime/UiOptions.java#L151
+build --terminal_columns=80
+
+######################################
+# Generic remote cache configuration #
+######################################
+
+# Only download remote outputs of top level targets to the local machine.
+# Docs: https://bazel.build/reference/command-line-reference#flag--remote_download_toplevel
+build --remote_download_toplevel
+
+# The maximum amount of time to wait for remote execution and cache calls.
+# https://bazel.build/reference/command-line-reference#flag--remote_timeout
+build --remote_timeout=3600
+
+# Upload locally executed action results to the remote cache.
+# Docs: https://bazel.build/reference/command-line-reference#flag--remote_upload_local_results
+build --remote_upload_local_results
+
+# Fall back to standalone local execution strategy if remote execution fails. If the grpc remote
+# cache connection fails, it will fail the build, add this so it falls back to the local cache.
+# Docs: https://bazel.build/reference/command-line-reference#flag--remote_local_fallback
+build --remote_local_fallback
+
+# Fixes builds hanging on CI that get the TCP connection closed without sending RST packets.
+# Docs: https://bazel.build/reference/command-line-reference#flag--grpc_keepalive_time
+build --grpc_keepalive_time=30s