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name: Test | ||
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on: | ||
push: | ||
branches: [ '*' ] | ||
tags: [ 'v*' ] | ||
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jobs: | ||
lint: | ||
runs-on: ubuntu-latest | ||
steps: | ||
- name: Checkout | ||
uses: actions/checkout@v3 | ||
- name: Run ShellCheck | ||
uses: ludeeus/action-shellcheck@master | ||
env: | ||
SHELLCHECK_OPTS: -x | ||
test: | ||
runs-on: ubuntu-latest | ||
steps: | ||
- name: Setup BATS | ||
run: | | ||
git clone --depth 1 --branch v1.10.0 https://github.com/bats-core/bats-core.git /tmp/bats | ||
sudo /tmp/bats/install.sh /usr/local | ||
rm -rf /tmp/bats | ||
sudo mkdir -p /usr/lib/bats/bats-support /usr/lib/bats/bats-assert | ||
wget -O- 'https://github.com/ztombol/bats-support/archive/refs/tags/v0.3.0.tar.gz' | \ | ||
sudo tar -xz --strip-components=1 -C /usr/lib/bats/bats-support | ||
wget -O- 'https://github.com/ztombol/bats-assert/archive/refs/tags/v0.3.0.tar.gz' | \ | ||
sudo tar -xz --strip-components=1 -C /usr/lib/bats/bats-assert | ||
- name: Checkout | ||
uses: actions/checkout@v3 | ||
- uses: orbit-online/upkg@v0.14.0 | ||
- name: Run tests | ||
run: bats . |
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# trap.sh | ||
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Library for managing bash signal traps. | ||
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## Contents | ||
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- [Installation](#installation) | ||
- [Usage](#usage) | ||
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## Installation | ||
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With [μpkg](https://github.com/orbit-online/upkg) | ||
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``` | ||
upkg install -g orbit-online/trap.sh@<VERSION> | ||
``` | ||
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## Usage | ||
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### `trap_append CMD SIGNAL` | ||
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Appends `CMD` to the `SIGNAL` trap. `$TRAP_POINTER` will contain a pointer | ||
that can be used with `trap_remove` to remove the command again. | ||
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### `trap_remove POINTER` | ||
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Removes the command identified by `POINTER` from the list of traps to run. |
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#!/usr/bin/env bats | ||
# shellcheck disable=2030,2031 | ||
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load '/usr/lib/bats/bats-support/load' | ||
load '/usr/lib/bats/bats-assert/load' | ||
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setup_file() { | ||
bats_require_minimum_version 1.5.0 | ||
} | ||
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@test 'trap is run on signal' { | ||
assert_equal "$(bash -ec "source $BATS_TEST_DIRNAME/trap.sh | ||
trap_append \"echo 'USR2 signal received'\" USR2 | ||
kill -s USR2 \$\$ | ||
")" 'USR2 signal received' | ||
} | ||
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@test 'trap removal works' { | ||
assert_equal "$(bash -ec "source $BATS_TEST_DIRNAME/trap.sh | ||
trap_append \"echo 'cmd to remove'\" USR2 | ||
p=\$TRAP_POINTER | ||
trap_append \"echo 'USR2 signal received'\" USR2 | ||
trap_remove \$p | ||
kill -s USR2 \$\$ | ||
")" 'USR2 signal received' | ||
} | ||
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@test 'only commands for specific signal are run' { | ||
assert_equal "$(bash -ec "source $BATS_TEST_DIRNAME/trap.sh | ||
trap_append \"echo 'USR1 signal received'\" USR1 | ||
trap_append \"echo 'USR2 signal received'\" USR2 | ||
kill -s USR2 \$\$ | ||
")" 'USR2 signal received' | ||
} |
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#!/usr/bin/env bash | ||
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TRAP_CMDS=() | ||
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_trap_run() { | ||
local signal=$1 trap_cmd | ||
for trap_cmd in "${TRAP_CMDS[@]}"; do | ||
[[ $trap_cmd = $signal* ]] || continue | ||
eval "${trap_cmd#"$signal "}" || true | ||
done | ||
} | ||
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trap_append() { | ||
local cmd=$1 signal=$2 trap_cmd | ||
TRAP_POINTER=0 | ||
for trap_cmd in "${TRAP_CMDS[@]}"; do | ||
[[ -n $trap_cmd ]] || break | ||
: $((TRAP_POINTER++)) | ||
done | ||
TRAP_CMDS[TRAP_POINTER]="$signal $cmd" | ||
# shellcheck disable=SC2064 | ||
[[ $(trap -p "$signal") = "trap -- '_trap_run $signal' $signal" ]] || trap "_trap_run $signal" "$signal" | ||
} | ||
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trap_remove() { | ||
local pointer=$1 | ||
TRAP_CMDS[pointer]='' | ||
} |
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{ | ||
"assets": ["trap.sh"] | ||
} |