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builtins.rs
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builtins.rs
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use bstr::ByteSlice;
use eden_dag::nameset::hints::Hints;
use lib::core::dag::CommitSet;
use lib::core::eventlog::{EventLogDb, EventReplayer};
use lib::core::rewrite::find_rewrite_target;
use lib::git::{
get_latest_test_command_path, get_test_tree_dir, Commit, MaybeZeroOid, Repo,
SerializedNonZeroOid, SerializedTestResult, TEST_ABORT_EXIT_CODE, TEST_INDETERMINATE_EXIT_CODE,
TEST_SUCCESS_EXIT_CODE,
};
use std::borrow::Cow;
use std::collections::HashMap;
use std::convert::TryFrom;
use tracing::{instrument, warn};
use eyre::Context as EyreContext;
use lazy_static::lazy_static;
use crate::eval::{
eval0, eval0_or_1, eval0_or_1_pattern, eval1, eval1_pattern, eval2, eval_number_rhs, Context,
EvalError, EvalResult,
};
use crate::pattern::{make_pattern_matcher_set, Pattern};
use crate::pattern::{PatternError, PatternMatcher};
use crate::Expr;
type FnType = &'static (dyn Fn(&mut Context, &str, &[Expr]) -> EvalResult + Sync);
lazy_static! {
pub(super) static ref FUNCTIONS: HashMap<&'static str, FnType> = {
let functions: &[(&'static str, FnType)] = &[
("all", &fn_all),
("none", &fn_none),
("union", &fn_union),
("intersection", &fn_intersection),
("difference", &fn_difference),
("only", &fn_only),
("range", &fn_range),
("not", &fn_not),
("ancestors", &fn_ancestors),
("ancestors.nth", &fn_nthancestor),
("descendants", &fn_descendants),
("parents", &fn_parents),
("parents.nth", &fn_parents_nth),
("children", &fn_children),
("siblings", &fn_siblings),
("roots", &fn_roots),
("heads", &fn_heads),
("branches", &fn_branches),
("main", &fn_main),
("public", &fn_public),
("draft", &fn_draft),
("stack", &fn_stack),
("message", &fn_message),
("paths.changed", &fn_path_changed),
("author.name", &fn_author_name),
("author.email", &fn_author_email),
("author.date", &fn_author_date),
("committer.name", &fn_committer_name),
("committer.email", &fn_committer_email),
("committer.date", &fn_committer_date),
("exactly", &fn_exactly),
("current", &fn_current),
("tests.passed", &fn_tests_passed),
("tests.failed", &fn_tests_failed),
("tests.fixable", &fn_tests_fixable),
];
functions.iter().cloned().collect()
};
}
#[instrument]
fn fn_all(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
eval0(ctx, name, args)?;
let visible_heads = ctx
.dag
.query_visible_heads()
.map_err(EvalError::OtherError)?;
let visible_commits = ctx.dag.query_ancestors(visible_heads.clone())?;
let visible_commits = ctx
.dag
.filter_visible_commits(visible_commits)
.map_err(EvalError::OtherError)?;
Ok(visible_commits)
}
#[instrument]
fn fn_none(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
eval0(ctx, name, args)?;
Ok(CommitSet::empty())
}
#[instrument]
fn fn_union(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let (lhs, rhs) = eval2(ctx, name, args)?;
Ok(lhs.union(&rhs))
}
#[instrument]
fn fn_intersection(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let (lhs, rhs) = eval2(ctx, name, args)?;
Ok(lhs.intersection(&rhs))
}
#[instrument]
fn fn_difference(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let (lhs, rhs) = eval2(ctx, name, args)?;
Ok(lhs.difference(&rhs))
}
#[instrument]
fn fn_only(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let (lhs, rhs) = eval2(ctx, name, args)?;
Ok(ctx.dag.query_only(lhs, rhs)?)
}
#[instrument]
fn fn_range(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let (lhs, rhs) = eval2(ctx, name, args)?;
Ok(ctx.dag.query_range(lhs, rhs)?)
}
#[instrument]
fn fn_not(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let expr = eval1(ctx, name, args)?;
let visible_heads = ctx
.dag
.query_visible_heads()
.map_err(EvalError::OtherError)?;
let visible_commits = ctx.dag.query_ancestors(visible_heads.clone())?;
Ok(visible_commits.difference(&expr))
}
#[instrument]
fn fn_ancestors(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let expr = eval1(ctx, name, args)?;
Ok(ctx.dag.query_ancestors(expr)?)
}
#[instrument]
fn fn_descendants(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let expr = eval1(ctx, name, args)?;
Ok(ctx.dag.query_descendants(expr)?)
}
#[instrument]
fn fn_parents(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let expr = eval1(ctx, name, args)?;
Ok(ctx.dag.query_parents(expr)?)
}
#[instrument]
fn fn_children(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let expr = eval1(ctx, name, args)?;
Ok(ctx.dag.query_children(expr)?)
}
#[instrument]
fn fn_siblings(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let expr = eval1(ctx, name, args)?;
let parents = ctx.dag.query_parents(expr.clone())?;
let children = ctx.dag.query_children(parents)?;
let siblings = children.difference(&expr);
Ok(siblings)
}
#[instrument]
fn fn_roots(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let expr = eval1(ctx, name, args)?;
Ok(ctx.dag.query_roots(expr)?)
}
#[instrument]
fn fn_heads(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let expr = eval1(ctx, name, args)?;
Ok(ctx.dag.query_heads(expr)?)
}
#[instrument]
fn fn_branches(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
eval0(ctx, name, args)?;
Ok(ctx.dag.branch_commits.clone())
}
#[instrument]
fn fn_parents_nth(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let (lhs, n) = eval_number_rhs(ctx, name, args)?;
let commit_oids = ctx
.dag
.commit_set_to_vec(&lhs)
.map_err(EvalError::OtherError)?;
let mut result = Vec::new();
for commit_oid in commit_oids {
if let Some(n) = n.checked_sub(1) {
let parents = ctx.dag.query_parent_names(commit_oid)?;
if let Some(parent) = parents.get(n) {
result.push(Ok(parent.clone()))
}
}
}
Ok(CommitSet::from_iter(result.into_iter(), Hints::default()))
}
#[instrument]
fn fn_nthancestor(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let (lhs, n) = eval_number_rhs(ctx, name, args)?;
let commit_oids = ctx
.dag
.commit_set_to_vec(&lhs)
.map_err(EvalError::OtherError)?;
let n: u64 = u64::try_from(n).unwrap();
let mut result = Vec::new();
for commit_oid in commit_oids {
let ancestor = ctx.dag.query_first_ancestor_nth(commit_oid.into(), n)?;
if let Some(ancestor) = ancestor {
result.push(Ok(ancestor.clone()))
}
}
Ok(CommitSet::from_iter(result.into_iter(), Hints::default()))
}
#[instrument]
fn fn_main(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
eval0(ctx, name, args)?;
Ok(ctx.dag.main_branch_commit.clone())
}
#[instrument]
fn fn_public(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
eval0(ctx, name, args)?;
let public_commits = ctx
.dag
.query_public_commits_slow()
.map_err(EvalError::OtherError)?;
Ok(public_commits.clone())
}
#[instrument]
fn fn_draft(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
eval0(ctx, name, args)?;
let draft_commits = ctx
.dag
.query_draft_commits()
.map_err(EvalError::OtherError)?;
Ok(draft_commits.clone())
}
#[instrument]
fn fn_stack(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let arg = eval0_or_1(ctx, name, args)?.unwrap_or_else(|| ctx.dag.head_commit.clone());
let draft_commits = ctx
.dag
.query_draft_commits()
.map_err(EvalError::OtherError)?;
let stack_roots = ctx.dag.query_roots(draft_commits.clone())?;
let stack_ancestors = ctx.dag.query_range(stack_roots, arg)?;
let stack = ctx
.dag
// Note that for a graph like
//
// ```
// O
// |
// o A
// | \
// | o B
// |
// @ C
// ```
// this will return `{A, B, C}`, not just `{A, C}`.
.query_range(stack_ancestors, draft_commits.clone())?;
Ok(stack)
}
type MatcherFn = dyn Fn(&Repo, &Commit) -> Result<bool, PatternError> + Sync + Send;
#[instrument(skip(f))]
fn make_pattern_matcher(
ctx: &mut Context,
name: &str,
args: &[Expr],
f: Box<MatcherFn>,
) -> Result<CommitSet, EvalError> {
struct Matcher {
expr: String,
f: Box<MatcherFn>,
}
impl PatternMatcher for Matcher {
fn get_description(&self) -> &str {
&self.expr
}
fn matches_commit(&self, repo: &Repo, commit: &Commit) -> Result<bool, PatternError> {
(self.f)(repo, commit)
}
}
let matcher = Matcher {
expr: Expr::FunctionCall(Cow::Borrowed(name), args.to_vec()).to_string(),
f,
};
let matcher = make_pattern_matcher_set(ctx, ctx.repo, Box::new(matcher))?;
Ok(matcher)
}
#[instrument]
fn fn_message(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval1_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(move |_repo, commit| {
let message = commit.get_message_raw();
let message = match message.to_str() {
Ok(message) => message,
Err(err) => {
warn!(
?commit,
?message,
?err,
"Commit message could not be decoded as UTF-8"
);
return Ok(false);
}
};
Ok(pattern.matches_text(message))
}),
)
}
#[instrument]
fn fn_path_changed(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval1_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(move |repo: &Repo, commit: &Commit| {
let touched_paths = repo
.get_paths_touched_by_commit(commit)
.map_err(PatternError::Repo)?;
let result = touched_paths.into_iter().any(|path| {
let path = match path.to_str() {
Some(path) => path,
None => {
warn!(
?commit,
?path,
"Commit message could not be decoded as UTF-8"
);
return false;
}
};
pattern.matches_text(path)
});
Ok(result)
}),
)
}
#[instrument]
fn fn_author_name(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval1_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(
move |_repo: &Repo, commit: &Commit| match commit.get_author().get_name() {
Some(name) => Ok(pattern.matches_text(name)),
None => Ok(false),
},
),
)
}
#[instrument]
fn fn_author_email(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval1_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(
move |_repo: &Repo, commit: &Commit| match commit.get_author().get_email() {
Some(name) => Ok(pattern.matches_text(name)),
None => Ok(false),
},
),
)
}
#[instrument]
fn fn_author_date(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval1_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(move |_repo: &Repo, commit: &Commit| {
let time = commit.get_author().get_time();
Ok(pattern.matches_date(&time))
}),
)
}
#[instrument]
fn fn_committer_name(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval1_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(
move |_repo: &Repo, commit: &Commit| match commit.get_committer().get_name() {
Some(name) => Ok(pattern.matches_text(name)),
None => Ok(false),
},
),
)
}
#[instrument]
fn fn_committer_email(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval1_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(
move |_repo: &Repo, commit: &Commit| match commit.get_committer().get_email() {
Some(name) => Ok(pattern.matches_text(name)),
None => Ok(false),
},
),
)
}
#[instrument]
fn fn_committer_date(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval1_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(move |_repo: &Repo, commit: &Commit| {
let time = commit.get_committer().get_time();
Ok(pattern.matches_date(&time))
}),
)
}
#[instrument]
fn fn_exactly(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let (lhs, expected_len) = eval_number_rhs(ctx, name, args)?;
let actual_len: usize = ctx.dag.set_count(&lhs)?;
if actual_len == expected_len {
Ok(lhs)
} else {
Err(EvalError::UnexpectedSetLength {
expr: format!("{}", args[0]),
expected_len,
actual_len,
})
}
}
#[instrument]
fn fn_current(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let mut dag = ctx
.dag
.clear_obsolete_commits(ctx.repo)
.map_err(EvalError::OtherError)?;
let mut ctx = Context {
effects: ctx.effects,
repo: ctx.repo,
dag: &mut dag,
};
let expr = eval1(&mut ctx, name, args)?;
let conn = ctx.repo.get_db_conn()?;
let event_log_db = EventLogDb::new(&conn)
.wrap_err("Connecting to event log")
.map_err(EvalError::OtherError)?;
let event_replayer = EventReplayer::from_event_log_db(ctx.effects, ctx.repo, &event_log_db)
.wrap_err("Retrieving event replayer")
.map_err(EvalError::OtherError)?;
let event_cursor = event_replayer.make_default_cursor();
let commit_oids = ctx
.dag
.commit_set_to_vec(&expr)
.map_err(EvalError::OtherError)?;
let mut result = Vec::new();
for commit_oid in commit_oids {
match find_rewrite_target(&event_replayer, event_cursor, commit_oid) {
Some(new_commit_oid) => match new_commit_oid {
MaybeZeroOid::NonZero(new_commit_oid) => {
// commit rewritten as new_commit_oid
result.push(new_commit_oid);
}
MaybeZeroOid::Zero => {
// commit deleted, skip
}
},
// commit not rewritten
None => result.push(commit_oid),
}
}
Ok(result.into_iter().collect::<CommitSet>())
}
fn read_all_test_results(repo: &Repo, commit: &Commit) -> Option<Vec<SerializedTestResult>> {
let commit_test_dir = get_test_tree_dir(repo, commit).ok()?;
let mut all_results = Vec::new();
for dir in std::fs::read_dir(commit_test_dir).ok()? {
let dir = dir.ok()?;
if dir.file_type().ok()?.is_dir() {
let result_path = dir.path().join("result");
let result_contents = std::fs::read_to_string(result_path).ok()?;
let result: SerializedTestResult = serde_json::from_str(&result_contents).ok()?;
all_results.push(result);
}
}
Some(all_results)
}
fn read_latest_test_command(repo: &Repo) -> Option<String> {
let latest_command_path = get_latest_test_command_path(repo).ok()?;
let latest_command = std::fs::read_to_string(latest_command_path).ok()?;
Some(latest_command)
}
fn eval_test_command_pattern(
ctx: &mut Context,
name: &str,
args: &[Expr],
) -> Result<Pattern, EvalError> {
match eval0_or_1_pattern(ctx, name, args)? {
Some(pattern) => Ok(pattern),
None => {
let latest_test_command =
read_latest_test_command(ctx.repo).ok_or(EvalError::NoLatestTestCommand)?;
Ok(Pattern::Exact(latest_test_command))
}
}
}
#[instrument]
fn fn_tests_passed(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval_test_command_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(move |repo: &Repo, commit: &Commit| {
let result = read_all_test_results(repo, commit)
.unwrap_or_default()
.into_iter()
.any(|test_result| {
let SerializedTestResult {
command,
exit_code,
head_commit_oid: _,
snapshot_tree_oid: _,
interactive: _,
} = test_result;
exit_code == TEST_SUCCESS_EXIT_CODE
&& pattern.matches_text(&command.to_string())
});
Ok(result)
}),
)
}
#[instrument]
fn fn_tests_failed(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval_test_command_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(move |repo: &Repo, commit: &Commit| {
let result = read_all_test_results(repo, commit)
.unwrap_or_default()
.into_iter()
.any(|test_result| {
let SerializedTestResult {
command,
exit_code,
head_commit_oid: _,
snapshot_tree_oid: _,
interactive: _,
} = test_result;
exit_code != TEST_SUCCESS_EXIT_CODE
&& exit_code != TEST_INDETERMINATE_EXIT_CODE
&& exit_code != TEST_ABORT_EXIT_CODE
&& pattern.matches_text(&command.to_string())
});
Ok(result)
}),
)
}
#[instrument]
fn fn_tests_fixable(ctx: &mut Context, name: &str, args: &[Expr]) -> EvalResult {
let pattern = eval_test_command_pattern(ctx, name, args)?;
make_pattern_matcher(
ctx,
name,
args,
Box::new(move |repo: &Repo, commit: &Commit| {
let result = read_all_test_results(repo, commit)
.unwrap_or_default()
.into_iter()
.any(|test_result| {
let SerializedTestResult {
command,
exit_code,
head_commit_oid: _,
snapshot_tree_oid,
interactive: _,
} = test_result;
exit_code == TEST_SUCCESS_EXIT_CODE
&& pattern.matches_text(&command.to_string())
&& match (snapshot_tree_oid, commit.get_tree_oid()) {
(
Some(SerializedNonZeroOid(snapshot_tree_oid)),
MaybeZeroOid::NonZero(original_tree_oid),
) => snapshot_tree_oid != original_tree_oid,
(None, _) | (_, MaybeZeroOid::Zero) => false,
}
});
Ok(result)
}),
)
}