734 lines
26 KiB
Bash
Executable File
734 lines
26 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
# shellcheck disable=SC2016
|
|
|
|
# Tests lib.fileset
|
|
# Run:
|
|
# [nixpkgs]$ lib/fileset/tests.sh
|
|
# or:
|
|
# [nixpkgs]$ nix-build lib/tests/release.nix
|
|
|
|
set -euo pipefail
|
|
shopt -s inherit_errexit dotglob
|
|
|
|
die() {
|
|
# The second to last entry contains the line number of the top-level caller
|
|
lineIndex=$(( ${#BASH_LINENO[@]} - 2 ))
|
|
echo >&2 -e "test case at ${BASH_SOURCE[0]}:${BASH_LINENO[$lineIndex]} failed:" "$@"
|
|
exit 1
|
|
}
|
|
|
|
if test -n "${TEST_LIB:-}"; then
|
|
NIX_PATH=nixpkgs="$(dirname "$TEST_LIB")"
|
|
else
|
|
NIX_PATH=nixpkgs="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.."; pwd)"
|
|
fi
|
|
export NIX_PATH
|
|
|
|
tmp="$(mktemp -d)"
|
|
clean_up() {
|
|
rm -rf "$tmp"
|
|
}
|
|
trap clean_up EXIT SIGINT SIGTERM
|
|
work="$tmp/work"
|
|
mkdir "$work"
|
|
cd "$work"
|
|
|
|
# Crudely unquotes a JSON string by just taking everything between the first and the second quote.
|
|
# We're only using this for resulting /nix/store paths, which can't contain " anyways,
|
|
# nor can they contain any other characters that would need to be escaped specially in JSON
|
|
# This way we don't need to add a dependency on e.g. jq
|
|
crudeUnquoteJSON() {
|
|
cut -d \" -f2
|
|
}
|
|
|
|
prefixExpression='let
|
|
lib = import <nixpkgs/lib>;
|
|
internal = import <nixpkgs/lib/fileset/internal.nix> {
|
|
inherit lib;
|
|
};
|
|
in
|
|
with lib;
|
|
with internal;
|
|
with lib.fileset;'
|
|
|
|
# Check that two nix expression successfully evaluate to the same value.
|
|
# The expressions have `lib.fileset` in scope.
|
|
# Usage: expectEqual NIX NIX
|
|
expectEqual() {
|
|
local actualExpr=$1
|
|
local expectedExpr=$2
|
|
if actualResult=$(nix-instantiate --eval --strict --show-trace 2>"$tmp"/actualStderr \
|
|
--expr "$prefixExpression ($actualExpr)"); then
|
|
actualExitCode=$?
|
|
else
|
|
actualExitCode=$?
|
|
fi
|
|
actualStderr=$(< "$tmp"/actualStderr)
|
|
|
|
if expectedResult=$(nix-instantiate --eval --strict --show-trace 2>"$tmp"/expectedStderr \
|
|
--expr "$prefixExpression ($expectedExpr)"); then
|
|
expectedExitCode=$?
|
|
else
|
|
expectedExitCode=$?
|
|
fi
|
|
expectedStderr=$(< "$tmp"/expectedStderr)
|
|
|
|
if [[ "$actualExitCode" != "$expectedExitCode" ]]; then
|
|
echo "$actualStderr" >&2
|
|
echo "$actualResult" >&2
|
|
die "$actualExpr should have exited with $expectedExitCode, but it exited with $actualExitCode"
|
|
fi
|
|
|
|
if [[ "$actualResult" != "$expectedResult" ]]; then
|
|
die "$actualExpr should have evaluated to $expectedExpr:\n$expectedResult\n\nbut it evaluated to\n$actualResult"
|
|
fi
|
|
|
|
if [[ "$actualStderr" != "$expectedStderr" ]]; then
|
|
die "$actualExpr should have had this on stderr:\n$expectedStderr\n\nbut it was\n$actualStderr"
|
|
fi
|
|
}
|
|
|
|
# Check that a nix expression evaluates successfully to a store path and returns it (without quotes).
|
|
# The expression has `lib.fileset` in scope.
|
|
# Usage: expectStorePath NIX
|
|
expectStorePath() {
|
|
local expr=$1
|
|
if ! result=$(nix-instantiate --eval --strict --json --read-write-mode --show-trace \
|
|
--expr "$prefixExpression ($expr)"); then
|
|
die "$expr failed to evaluate, but it was expected to succeed"
|
|
fi
|
|
# This is safe because we assume to get back a store path in a string
|
|
crudeUnquoteJSON <<< "$result"
|
|
}
|
|
|
|
# Check that a nix expression fails to evaluate (strictly, read-write-mode).
|
|
# And check the received stderr against a regex
|
|
# The expression has `lib.fileset` in scope.
|
|
# Usage: expectFailure NIX REGEX
|
|
expectFailure() {
|
|
local expr=$1
|
|
local expectedErrorRegex=$2
|
|
if result=$(nix-instantiate --eval --strict --read-write-mode --show-trace 2>"$tmp/stderr" \
|
|
--expr "$prefixExpression $expr"); then
|
|
die "$expr evaluated successfully to $result, but it was expected to fail"
|
|
fi
|
|
stderr=$(<"$tmp/stderr")
|
|
if [[ ! "$stderr" =~ $expectedErrorRegex ]]; then
|
|
die "$expr should have errored with this regex pattern:\n\n$expectedErrorRegex\n\nbut this was the actual error:\n\n$stderr"
|
|
fi
|
|
}
|
|
|
|
# Check that the traces of a Nix expression are as expected when evaluated.
|
|
# The expression has `lib.fileset` in scope.
|
|
# Usage: expectTrace NIX STR
|
|
expectTrace() {
|
|
local expr=$1
|
|
local expectedTrace=$2
|
|
|
|
nix-instantiate --eval --show-trace >/dev/null 2>"$tmp"/stderrTrace \
|
|
--expr "$prefixExpression trace ($expr)" || true
|
|
|
|
actualTrace=$(sed -n 's/^trace: //p' "$tmp/stderrTrace")
|
|
|
|
nix-instantiate --eval --show-trace >/dev/null 2>"$tmp"/stderrTraceVal \
|
|
--expr "$prefixExpression traceVal ($expr)" || true
|
|
|
|
actualTraceVal=$(sed -n 's/^trace: //p' "$tmp/stderrTraceVal")
|
|
|
|
# Test that traceVal returns the same trace as trace
|
|
if [[ "$actualTrace" != "$actualTraceVal" ]]; then
|
|
cat "$tmp"/stderrTrace >&2
|
|
die "$expr traced this for lib.fileset.trace:\n\n$actualTrace\n\nand something different for lib.fileset.traceVal:\n\n$actualTraceVal"
|
|
fi
|
|
|
|
if [[ "$actualTrace" != "$expectedTrace" ]]; then
|
|
cat "$tmp"/stderrTrace >&2
|
|
die "$expr should have traced this:\n\n$expectedTrace\n\nbut this was actually traced:\n\n$actualTrace"
|
|
fi
|
|
}
|
|
|
|
# We conditionally use inotifywait in withFileMonitor.
|
|
# Check early whether it's available
|
|
# TODO: Darwin support, though not crucial since we have Linux CI
|
|
if type inotifywait 2>/dev/null >/dev/null; then
|
|
canMonitor=1
|
|
else
|
|
echo "Warning: Cannot check for paths not getting read since the inotifywait command (from the inotify-tools package) is not available" >&2
|
|
canMonitor=
|
|
fi
|
|
|
|
# Run a function while monitoring that it doesn't read certain paths
|
|
# Usage: withFileMonitor FUNNAME PATH...
|
|
# - FUNNAME should be a bash function that:
|
|
# - Performs some operation that should not read some paths
|
|
# - Delete the paths it shouldn't read without triggering any open events
|
|
# - PATH... are the paths that should not get read
|
|
#
|
|
# This function outputs the same as FUNNAME
|
|
withFileMonitor() {
|
|
local funName=$1
|
|
shift
|
|
|
|
# If we can't monitor files or have none to monitor, just run the function directly
|
|
if [[ -z "$canMonitor" ]] || (( "$#" == 0 )); then
|
|
"$funName"
|
|
else
|
|
|
|
# Use a subshell to start the coprocess in and use a trap to kill it when exiting the subshell
|
|
(
|
|
# Assigned by coproc, makes shellcheck happy
|
|
local watcher watcher_PID
|
|
|
|
# Start inotifywait in the background to monitor all excluded paths
|
|
coproc watcher {
|
|
# inotifywait outputs a string on stderr when ready
|
|
# Redirect it to stdout so we can access it from the coproc's stdout fd
|
|
# exec so that the coprocess is inotify itself, making the kill below work correctly
|
|
# See below why we listen to both open and delete_self events
|
|
exec inotifywait --format='%e %w' --event open,delete_self --monitor "$@" 2>&1
|
|
}
|
|
|
|
# This will trigger when this subshell exits, no matter if successful or not
|
|
# After exiting the subshell, the parent shell will continue executing
|
|
trap 'kill "${watcher_PID}"' exit
|
|
|
|
# Synchronously wait until inotifywait is ready
|
|
while read -r -u "${watcher[0]}" line && [[ "$line" != "Watches established." ]]; do
|
|
:
|
|
done
|
|
|
|
# Call the function that should not read the given paths and delete them afterwards
|
|
"$funName"
|
|
|
|
# Get the first event
|
|
read -r -u "${watcher[0]}" event file
|
|
|
|
# With funName potentially reading files first before deleting them,
|
|
# there's only these two possible event timelines:
|
|
# - open*, ..., open*, delete_self, ..., delete_self: If some excluded paths were read
|
|
# - delete_self, ..., delete_self: If no excluded paths were read
|
|
# So by looking at the first event we can figure out which one it is!
|
|
# This also means we don't have to wait to collect all events.
|
|
case "$event" in
|
|
OPEN*)
|
|
die "$funName opened excluded file $file when it shouldn't have"
|
|
;;
|
|
DELETE_SELF)
|
|
# Expected events
|
|
;;
|
|
*)
|
|
die "During $funName, Unexpected event type '$event' on file $file that should be excluded"
|
|
;;
|
|
esac
|
|
)
|
|
fi
|
|
}
|
|
|
|
# Check whether a file set includes/excludes declared paths as expected, usage:
|
|
#
|
|
# tree=(
|
|
# [a/b] =1 # Declare that file a/b should exist and expect it to be included in the store path
|
|
# [c/a] = # Declare that file c/a should exist and expect it to be excluded in the store path
|
|
# [c/d/]= # Declare that directory c/d/ should exist and expect it to be excluded in the store path
|
|
# )
|
|
# checkFileset './a' # Pass the fileset as the argument
|
|
declare -A tree
|
|
checkFileset() {
|
|
# New subshell so that we can have a separate trap handler, see `trap` below
|
|
local fileset=$1
|
|
|
|
# Process the tree into separate arrays for included paths, excluded paths and excluded files.
|
|
local -a included=()
|
|
local -a excluded=()
|
|
local -a excludedFiles=()
|
|
# Track which paths need to be created
|
|
local -a dirsToCreate=()
|
|
local -a filesToCreate=()
|
|
for p in "${!tree[@]}"; do
|
|
# If keys end with a `/` we treat them as directories, otherwise files
|
|
if [[ "$p" =~ /$ ]]; then
|
|
dirsToCreate+=("$p")
|
|
isFile=
|
|
else
|
|
filesToCreate+=("$p")
|
|
isFile=1
|
|
fi
|
|
case "${tree[$p]}" in
|
|
1)
|
|
included+=("$p")
|
|
;;
|
|
0)
|
|
excluded+=("$p")
|
|
if [[ -n "$isFile" ]]; then
|
|
excludedFiles+=("$p")
|
|
fi
|
|
;;
|
|
*)
|
|
die "Unsupported tree value: ${tree[$p]}"
|
|
esac
|
|
done
|
|
|
|
# Create all the necessary paths.
|
|
# This is done with only a fixed number of processes,
|
|
# in order to not be too slow
|
|
# Though this does mean we're a bit limited with how many files can be created
|
|
if (( ${#dirsToCreate[@]} != 0 )); then
|
|
mkdir -p "${dirsToCreate[@]}"
|
|
fi
|
|
if (( ${#filesToCreate[@]} != 0 )); then
|
|
readarray -d '' -t parentsToCreate < <(dirname -z "${filesToCreate[@]}")
|
|
mkdir -p "${parentsToCreate[@]}"
|
|
touch "${filesToCreate[@]}"
|
|
fi
|
|
|
|
expression="toSource { root = ./.; fileset = $fileset; }"
|
|
|
|
# We don't have lambda's in bash unfortunately,
|
|
# so we just define a function instead and then pass its name
|
|
# shellcheck disable=SC2317
|
|
run() {
|
|
# Call toSource with the fileset, triggering open events for all files that are added to the store
|
|
expectStorePath "$expression"
|
|
if (( ${#excludedFiles[@]} != 0 )); then
|
|
rm "${excludedFiles[@]}"
|
|
fi
|
|
}
|
|
|
|
# Runs the function while checking that the given excluded files aren't read
|
|
storePath=$(withFileMonitor run "${excludedFiles[@]}")
|
|
|
|
# For each path that should be included, make sure it does occur in the resulting store path
|
|
for p in "${included[@]}"; do
|
|
if [[ ! -e "$storePath/$p" ]]; then
|
|
die "$expression doesn't include path $p when it should have"
|
|
fi
|
|
done
|
|
|
|
# For each path that should be excluded, make sure it doesn't occur in the resulting store path
|
|
for p in "${excluded[@]}"; do
|
|
if [[ -e "$storePath/$p" ]]; then
|
|
die "$expression included path $p when it shouldn't have"
|
|
fi
|
|
done
|
|
|
|
rm -rf -- *
|
|
}
|
|
|
|
|
|
#### Error messages #####
|
|
|
|
# Absolute paths in strings cannot be passed as `root`
|
|
expectFailure 'toSource { root = "/nix/store/foobar"; fileset = ./.; }' 'lib.fileset.toSource: `root` \("/nix/store/foobar"\) is a string-like value, but it should be a path instead.
|
|
\s*Paths in strings are not supported by `lib.fileset`, use `lib.sources` or derivations instead.'
|
|
|
|
# Only paths are accepted as `root`
|
|
expectFailure 'toSource { root = 10; fileset = ./.; }' 'lib.fileset.toSource: `root` is of type int, but it should be a path instead.'
|
|
|
|
# Different filesystem roots in root and fileset are not supported
|
|
mkdir -p {foo,bar}/mock-root
|
|
expectFailure 'with ((import <nixpkgs/lib>).extend (import <nixpkgs/lib/fileset/mock-splitRoot.nix>)).fileset;
|
|
toSource { root = ./foo/mock-root; fileset = ./bar/mock-root; }
|
|
' 'lib.fileset.toSource: Filesystem roots are not the same for `fileset` and `root` \("'"$work"'/foo/mock-root"\):
|
|
\s*`root`: root "'"$work"'/foo/mock-root"
|
|
\s*`fileset`: root "'"$work"'/bar/mock-root"
|
|
\s*Different roots are not supported.'
|
|
rm -rf *
|
|
|
|
# `root` needs to exist
|
|
expectFailure 'toSource { root = ./a; fileset = ./.; }' 'lib.fileset.toSource: `root` \('"$work"'/a\) does not exist.'
|
|
|
|
# `root` needs to be a file
|
|
touch a
|
|
expectFailure 'toSource { root = ./a; fileset = ./a; }' 'lib.fileset.toSource: `root` \('"$work"'/a\) is a file, but it should be a directory instead. Potential solutions:
|
|
\s*- If you want to import the file into the store _without_ a containing directory, use string interpolation or `builtins.path` instead of this function.
|
|
\s*- If you want to import the file into the store _with_ a containing directory, set `root` to the containing directory, such as '"$work"', and set `fileset` to the file path.'
|
|
rm -rf *
|
|
|
|
# The fileset argument should be evaluated, even if the directory is empty
|
|
expectFailure 'toSource { root = ./.; fileset = abort "This should be evaluated"; }' 'evaluation aborted with the following error message: '\''This should be evaluated'\'
|
|
|
|
# Only paths under `root` should be able to influence the result
|
|
mkdir a
|
|
expectFailure 'toSource { root = ./a; fileset = ./.; }' 'lib.fileset.toSource: `fileset` could contain files in '"$work"', which is not under the `root` \('"$work"'/a\). Potential solutions:
|
|
\s*- Set `root` to '"$work"' or any directory higher up. This changes the layout of the resulting store path.
|
|
\s*- Set `fileset` to a file set that cannot contain files outside the `root` \('"$work"'/a\). This could change the files included in the result.'
|
|
rm -rf *
|
|
|
|
# Path coercion only works for paths
|
|
expectFailure 'toSource { root = ./.; fileset = 10; }' 'lib.fileset.toSource: `fileset` is of type int, but it should be a path instead.'
|
|
expectFailure 'toSource { root = ./.; fileset = "/some/path"; }' 'lib.fileset.toSource: `fileset` \("/some/path"\) is a string-like value, but it should be a path instead.
|
|
\s*Paths represented as strings are not supported by `lib.fileset`, use `lib.sources` or derivations instead.'
|
|
|
|
# Path coercion errors for non-existent paths
|
|
expectFailure 'toSource { root = ./.; fileset = ./a; }' 'lib.fileset.toSource: `fileset` \('"$work"'/a\) does not exist.'
|
|
|
|
# File sets cannot be evaluated directly
|
|
expectFailure 'union ./. ./.' 'lib.fileset: Directly evaluating a file set is not supported.
|
|
\s*To turn it into a usable source, use `lib.fileset.toSource`.
|
|
\s*To pretty-print the contents, use `lib.fileset.trace` or `lib.fileset.traceVal`.'
|
|
expectFailure '_emptyWithoutBase' 'lib.fileset: Directly evaluating a file set is not supported.
|
|
\s*To turn it into a usable source, use `lib.fileset.toSource`.
|
|
\s*To pretty-print the contents, use `lib.fileset.trace` or `lib.fileset.traceVal`.'
|
|
|
|
# Past versions of the internal representation are supported
|
|
expectEqual '_coerce "<tests>: value" { _type = "fileset"; _internalVersion = 0; _internalBase = ./.; }' \
|
|
'{ _internalBase = ./.; _internalBaseComponents = path.subpath.components (path.splitRoot ./.).subpath; _internalBaseRoot = /.; _internalIsEmptyWithoutBase = false; _internalVersion = 3; _type = "fileset"; }'
|
|
expectEqual '_coerce "<tests>: value" { _type = "fileset"; _internalVersion = 1; }' \
|
|
'{ _type = "fileset"; _internalIsEmptyWithoutBase = false; _internalVersion = 3; }'
|
|
expectEqual '_coerce "<tests>: value" { _type = "fileset"; _internalVersion = 2; }' \
|
|
'{ _type = "fileset"; _internalIsEmptyWithoutBase = false; _internalVersion = 3; }'
|
|
|
|
# Future versions of the internal representation are unsupported
|
|
expectFailure '_coerce "<tests>: value" { _type = "fileset"; _internalVersion = 4; }' '<tests>: value is a file set created from a future version of the file set library with a different internal representation:
|
|
\s*- Internal version of the file set: 4
|
|
\s*- Internal version of the library: 3
|
|
\s*Make sure to update your Nixpkgs to have a newer version of `lib.fileset`.'
|
|
|
|
# _create followed by _coerce should give the inputs back without any validation
|
|
expectEqual '{
|
|
inherit (_coerce "<test>" (_create ./. "directory"))
|
|
_internalVersion _internalBase _internalTree;
|
|
}' '{ _internalBase = ./.; _internalTree = "directory"; _internalVersion = 3; }'
|
|
|
|
#### Resulting store path ####
|
|
|
|
# The store path name should be "source"
|
|
expectEqual 'toSource { root = ./.; fileset = ./.; }' 'sources.cleanSourceWith { name = "source"; src = ./.; }'
|
|
|
|
# We should be able to import an empty directory and end up with an empty result
|
|
tree=(
|
|
)
|
|
checkFileset './.'
|
|
|
|
# The empty value without a base should also result in an empty result
|
|
tree=(
|
|
[a]=0
|
|
)
|
|
checkFileset '_emptyWithoutBase'
|
|
|
|
# Directories recursively containing no files are not included
|
|
tree=(
|
|
[e/]=0
|
|
[d/e/]=0
|
|
[d/d/e/]=0
|
|
[d/d/f]=1
|
|
[d/f]=1
|
|
[f]=1
|
|
)
|
|
checkFileset './.'
|
|
|
|
# Check trees that could cause a naïve string prefix checking implementation to fail
|
|
tree=(
|
|
[a]=0
|
|
[ab/x]=0
|
|
[ab/xy]=1
|
|
[ab/xyz]=0
|
|
[abc]=0
|
|
)
|
|
checkFileset './ab/xy'
|
|
|
|
# Check path coercion examples in ../../doc/functions/fileset.section.md
|
|
tree=(
|
|
[a/x]=1
|
|
[a/b/y]=1
|
|
[c/]=0
|
|
[c/d/]=0
|
|
)
|
|
checkFileset './.'
|
|
|
|
tree=(
|
|
[a/x]=1
|
|
[a/b/y]=1
|
|
[c/]=0
|
|
[c/d/]=0
|
|
)
|
|
checkFileset './a'
|
|
|
|
tree=(
|
|
[a/x]=1
|
|
[a/b/y]=0
|
|
[c/]=0
|
|
[c/d/]=0
|
|
)
|
|
checkFileset './a/x'
|
|
|
|
tree=(
|
|
[a/x]=0
|
|
[a/b/y]=1
|
|
[c/]=0
|
|
[c/d/]=0
|
|
)
|
|
checkFileset './a/b'
|
|
|
|
tree=(
|
|
[a/x]=0
|
|
[a/b/y]=0
|
|
[c/]=0
|
|
[c/d/]=0
|
|
)
|
|
checkFileset './c'
|
|
|
|
# Test the source filter for the somewhat special case of files in the filesystem root
|
|
# We can't easily test this with the above functions because we can't write to the filesystem root and we don't want to make any assumptions which files are there in the sandbox
|
|
expectEqual '_toSourceFilter (_create /. null) "/foo" ""' 'false'
|
|
expectEqual '_toSourceFilter (_create /. { foo = "regular"; }) "/foo" ""' 'true'
|
|
expectEqual '_toSourceFilter (_create /. { foo = null; }) "/foo" ""' 'false'
|
|
|
|
|
|
## lib.fileset.union, lib.fileset.unions
|
|
|
|
|
|
# Different filesystem roots in root and fileset are not supported
|
|
mkdir -p {foo,bar}/mock-root
|
|
expectFailure 'with ((import <nixpkgs/lib>).extend (import <nixpkgs/lib/fileset/mock-splitRoot.nix>)).fileset;
|
|
toSource { root = ./.; fileset = union ./foo/mock-root ./bar/mock-root; }
|
|
' 'lib.fileset.union: Filesystem roots are not the same:
|
|
\s*first argument: root "'"$work"'/foo/mock-root"
|
|
\s*second argument: root "'"$work"'/bar/mock-root"
|
|
\s*Different roots are not supported.'
|
|
|
|
expectFailure 'with ((import <nixpkgs/lib>).extend (import <nixpkgs/lib/fileset/mock-splitRoot.nix>)).fileset;
|
|
toSource { root = ./.; fileset = unions [ ./foo/mock-root ./bar/mock-root ]; }
|
|
' 'lib.fileset.unions: Filesystem roots are not the same:
|
|
\s*element 0: root "'"$work"'/foo/mock-root"
|
|
\s*element 1: root "'"$work"'/bar/mock-root"
|
|
\s*Different roots are not supported.'
|
|
rm -rf *
|
|
|
|
# Coercion errors show the correct context
|
|
expectFailure 'toSource { root = ./.; fileset = union ./a ./.; }' 'lib.fileset.union: first argument \('"$work"'/a\) does not exist.'
|
|
expectFailure 'toSource { root = ./.; fileset = union ./. ./b; }' 'lib.fileset.union: second argument \('"$work"'/b\) does not exist.'
|
|
expectFailure 'toSource { root = ./.; fileset = unions [ ./a ./. ]; }' 'lib.fileset.unions: element 0 \('"$work"'/a\) does not exist.'
|
|
expectFailure 'toSource { root = ./.; fileset = unions [ ./. ./b ]; }' 'lib.fileset.unions: element 1 \('"$work"'/b\) does not exist.'
|
|
|
|
# unions needs a list
|
|
expectFailure 'toSource { root = ./.; fileset = unions null; }' 'lib.fileset.unions: Expected argument to be a list, but got a null.'
|
|
|
|
# The tree of later arguments should not be evaluated if a former argument already includes all files
|
|
tree=()
|
|
checkFileset 'union ./. (_create ./. (abort "This should not be used!"))'
|
|
checkFileset 'unions [ ./. (_create ./. (abort "This should not be used!")) ]'
|
|
|
|
# unions doesn't include any files for an empty list or only empty values without a base
|
|
tree=(
|
|
[x]=0
|
|
[y/z]=0
|
|
)
|
|
checkFileset 'unions [ ]'
|
|
checkFileset 'unions [ _emptyWithoutBase ]'
|
|
checkFileset 'unions [ _emptyWithoutBase _emptyWithoutBase ]'
|
|
checkFileset 'union _emptyWithoutBase _emptyWithoutBase'
|
|
|
|
# The empty value without a base is the left and right identity of union
|
|
tree=(
|
|
[x]=1
|
|
[y/z]=0
|
|
)
|
|
checkFileset 'union ./x _emptyWithoutBase'
|
|
checkFileset 'union _emptyWithoutBase ./x'
|
|
|
|
# union doesn't include files that weren't specified
|
|
tree=(
|
|
[x]=1
|
|
[y]=1
|
|
[z]=0
|
|
)
|
|
checkFileset 'union ./x ./y'
|
|
checkFileset 'unions [ ./x ./y ]'
|
|
|
|
# Also for directories
|
|
tree=(
|
|
[x/a]=1
|
|
[x/b]=1
|
|
[y/a]=1
|
|
[y/b]=1
|
|
[z/a]=0
|
|
[z/b]=0
|
|
)
|
|
checkFileset 'union ./x ./y'
|
|
checkFileset 'unions [ ./x ./y ]'
|
|
|
|
# And for very specific paths
|
|
tree=(
|
|
[x/a]=1
|
|
[x/b]=0
|
|
[y/a]=0
|
|
[y/b]=1
|
|
[z/a]=0
|
|
[z/b]=0
|
|
)
|
|
checkFileset 'union ./x/a ./y/b'
|
|
checkFileset 'unions [ ./x/a ./y/b ]'
|
|
|
|
# unions or chained union's can include more paths
|
|
tree=(
|
|
[x/a]=1
|
|
[x/b]=1
|
|
[y/a]=1
|
|
[y/b]=0
|
|
[z/a]=0
|
|
[z/b]=1
|
|
)
|
|
checkFileset 'unions [ ./x/a ./x/b ./y/a ./z/b ]'
|
|
checkFileset 'union (union ./x/a ./x/b) (union ./y/a ./z/b)'
|
|
checkFileset 'union (union (union ./x/a ./x/b) ./y/a) ./z/b'
|
|
|
|
# unions should not stack overflow, even if many elements are passed
|
|
tree=()
|
|
for i in $(seq 1000); do
|
|
tree[$i/a]=1
|
|
tree[$i/b]=0
|
|
done
|
|
# This is actually really hard to test:
|
|
# A lot of files would be needed to cause a stack overflow.
|
|
# And while we could limit the maximum stack size using `ulimit -s`,
|
|
# that turns out to not be very deterministic: https://github.com/NixOS/nixpkgs/pull/256417#discussion_r1339396686.
|
|
# Meanwhile, the test infra here is not the fastest, creating 10000 would be too slow.
|
|
# So, just using 1000 files for now.
|
|
checkFileset 'unions (mapAttrsToList (name: _: ./. + "/${name}/a") (builtins.readDir ./.))'
|
|
|
|
## Tracing
|
|
|
|
# The second trace argument is returned
|
|
expectEqual 'trace ./. "some value"' 'builtins.trace "(empty)" "some value"'
|
|
|
|
# The fileset traceVal argument is returned
|
|
expectEqual 'traceVal ./.' 'builtins.trace "(empty)" (_create ./. "directory")'
|
|
|
|
# The tracing happens before the final argument is needed
|
|
expectEqual 'trace ./.' 'builtins.trace "(empty)" (x: x)'
|
|
|
|
# Tracing an empty directory shows it as such
|
|
expectTrace './.' '(empty)'
|
|
|
|
# This also works if there are directories, but all recursively without files
|
|
mkdir -p a/b/c
|
|
expectTrace './.' '(empty)'
|
|
rm -rf -- *
|
|
|
|
# The empty file set without a base also prints as empty
|
|
expectTrace '_emptyWithoutBase' '(empty)'
|
|
expectTrace 'unions [ ]' '(empty)'
|
|
|
|
# If a directory is fully included, print it as such
|
|
touch a
|
|
expectTrace './.' "$work"' (all files in directory)'
|
|
rm -rf -- *
|
|
|
|
# If a directory is not fully included, recurse
|
|
mkdir a b
|
|
touch a/{x,y} b/{x,y}
|
|
expectTrace 'union ./a/x ./b' "$work"'
|
|
- a
|
|
- x (regular)
|
|
- b (all files in directory)'
|
|
rm -rf -- *
|
|
|
|
# If an included path is a file, print its type
|
|
touch a x
|
|
ln -s a b
|
|
mkfifo c
|
|
expectTrace 'unions [ ./a ./b ./c ]' "$work"'
|
|
- a (regular)
|
|
- b (symlink)
|
|
- c (unknown)'
|
|
rm -rf -- *
|
|
|
|
# Do not print directories without any files recursively
|
|
mkdir -p a/b/c
|
|
touch b x
|
|
expectTrace 'unions [ ./a ./b ]' "$work"'
|
|
- b (regular)'
|
|
rm -rf -- *
|
|
|
|
# If all children are either fully included or empty directories,
|
|
# the parent should be printed as fully included
|
|
touch a
|
|
mkdir b
|
|
expectTrace 'union ./a ./b' "$work"' (all files in directory)'
|
|
rm -rf -- *
|
|
|
|
mkdir -p x/b x/c
|
|
touch x/a
|
|
touch a
|
|
# If all children are either fully excluded or empty directories,
|
|
# the parent should be shown (or rather not shown) as fully excluded
|
|
expectTrace 'unions [ ./a ./x/b ./x/c ]' "$work"'
|
|
- a (regular)'
|
|
rm -rf -- *
|
|
|
|
# Completely filtered out directories also print as empty
|
|
touch a
|
|
expectTrace '_create ./. {}' '(empty)'
|
|
rm -rf -- *
|
|
|
|
# A general test to make sure the resulting format makes sense
|
|
# Such as indentation and ordering
|
|
mkdir -p bar/{qux,someDir}
|
|
touch bar/{baz,qux,someDir/a} foo
|
|
touch bar/qux/x
|
|
ln -s x bar/qux/a
|
|
mkfifo bar/qux/b
|
|
expectTrace 'unions [
|
|
./bar/baz
|
|
./bar/qux/a
|
|
./bar/qux/b
|
|
./bar/someDir/a
|
|
./foo
|
|
]' "$work"'
|
|
- bar
|
|
- baz (regular)
|
|
- qux
|
|
- a (symlink)
|
|
- b (unknown)
|
|
- someDir (all files in directory)
|
|
- foo (regular)'
|
|
rm -rf -- *
|
|
|
|
# For recursively included directories,
|
|
# `(all files in directory)` should only be used if there's at least one file (otherwise it would be `(empty)`)
|
|
# and this should be determined without doing a full search
|
|
#
|
|
# a is intentionally ordered first here in order to allow triggering the short-circuit behavior
|
|
# We then check that b is not read
|
|
# In a more realistic scenario, some directories might need to be recursed into,
|
|
# but a file would be quickly found to trigger the short-circuit.
|
|
touch a
|
|
mkdir b
|
|
# We don't have lambda's in bash unfortunately,
|
|
# so we just define a function instead and then pass its name
|
|
# shellcheck disable=SC2317
|
|
run() {
|
|
# This shouldn't read b/
|
|
expectTrace './.' "$work"' (all files in directory)'
|
|
# Remove all files immediately after, triggering delete_self events for all of them
|
|
rmdir b
|
|
}
|
|
# Runs the function while checking that b isn't read
|
|
withFileMonitor run b
|
|
rm -rf -- *
|
|
|
|
# Partially included directories trace entries as they are evaluated
|
|
touch a b c
|
|
expectTrace '_create ./. { a = null; b = "regular"; c = throw "b"; }' "$work"'
|
|
- b (regular)'
|
|
|
|
# Except entries that need to be evaluated to even figure out if it's only partially included:
|
|
# Here the directory could be fully excluded or included just from seeing a and b,
|
|
# so c needs to be evaluated before anything can be traced
|
|
expectTrace '_create ./. { a = null; b = null; c = throw "c"; }' ''
|
|
expectTrace '_create ./. { a = "regular"; b = "regular"; c = throw "c"; }' ''
|
|
rm -rf -- *
|
|
|
|
# We can trace large directories (10000 here) without any problems
|
|
filesToCreate=({0..9}{0..9}{0..9}{0..9})
|
|
expectedTrace=$work$'\n'$(printf -- '- %s (regular)\n' "${filesToCreate[@]}")
|
|
# We need an excluded file so it doesn't print as `(all files in directory)`
|
|
touch 0 "${filesToCreate[@]}"
|
|
expectTrace 'unions (mapAttrsToList (n: _: ./. + "/${n}") (removeAttrs (builtins.readDir ./.) [ "0" ]))' "$expectedTrace"
|
|
rm -rf -- *
|
|
|
|
# TODO: Once we have combinators and a property testing library, derive property tests from https://en.wikipedia.org/wiki/Algebra_of_sets
|
|
|
|
echo >&2 tests ok
|