diff options
| -rw-r--r-- | scripts/BUILD | 15 | ||||
| -rwxr-xr-x | scripts/generate_bash_completion.sh | 77 |
2 files changed, 85 insertions, 7 deletions
diff --git a/scripts/BUILD b/scripts/BUILD index decf702cfc..7c782cc760 100644 --- a/scripts/BUILD +++ b/scripts/BUILD @@ -8,15 +8,16 @@ genrule( name = "bash_completion", srcs = ["bazel-complete-template.bash"], outs = ["bazel-complete.bash"], - cmd = "cat $(SRCS) > $@\n" + - "touch err.log\n" + - "TMP=`mktemp -d $${TMPDIR:-/tmp}/tmp.XXXXXXXXXX`\n" + - "trap \"rm -fr err.log $${TMP}\" EXIT\n" + - "$(location //src:bazel) " + - " --batch --output_user_root=$${TMP} --host_javabase=$(JAVABASE) " + - " help completion 2>err.log >>$@ || { cat err.log; exit 1; }", + cmd = " ".join([ + "$(location :generate_bash_completion.sh)", + "--bazel=$(location //src:bazel)", + "--javabase=$(JAVABASE)", + "--output=$@", + "--prepend=$(location bazel-complete-template.bash)", + ]), output_to_bindir = 1, tools = [ + ":generate_bash_completion.sh", "//src:bazel", "//tools/defaults:jdk", ], diff --git a/scripts/generate_bash_completion.sh b/scripts/generate_bash_completion.sh new file mode 100755 index 0000000000..83851e39ff --- /dev/null +++ b/scripts/generate_bash_completion.sh @@ -0,0 +1,77 @@ +#!/bin/sh +# +# Copyright 2017 The Bazel Authors. All rights reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +# +# Generates the Bash completion script for Bazel. +# +# At a minimum, you must pass the --bazel and --output flags to specify the path +# to the Bazel binary to use and the output file to generate. +# +# Callers can customize the completion script by passing additional files with +# the --prepend and --append flags, which are stitched together to generate the +# final completion script. Prepended files can override built-in variables and +# appended files can override built-in functions. +# + +set -e + +die() { + echo "${@}" 1>&2 + exit 1 +} + +get_optarg() { + expr "${1}" : "[^=]*=\\(.*\\)" +} + +append= +bazel= +javabase= +output= +prepend= +while [ ${#} -gt 0 ]; do + case "${1}" in + --append=*) append="${append} $(get_optarg "${1}")" ;; + --bazel=*) bazel="$(get_optarg "${1}")" ;; + --javabase=*) javabase="$(get_optarg "${1}")" ;; + --output=*) output="$(get_optarg "${1}")" ;; + --prepend=*) prepend="${prepend} $(get_optarg "${1}")" ;; + --*) die "Unknown option ${1}" ;; + *) break ;; + esac + shift +done +[ ${#} -eq 0 ] || die "No arguments allowed" +[ -n "${bazel}" ] || die "--bazel required but not provided" +[ -n "${output}" ] || die "--output required but not provided" + +tempdir="$(mktemp -d "${TMPDIR:-/tmp}/generate_bash_completion.XXXXXXXX")" +trap "rm -rf '${tempdir}'" EXIT + +touch "${tempdir}/WORKSPACE" +mkdir "${tempdir}/root" + +[ -z "${prepend}" ] || cat ${prepend} >>"${tempdir}/output" + +host_javabase_flag= +[ -z "${javabase}" ] || host_javabase_flag="--host_javabase=${javabase}" +"${bazel}" --output_user_root="${tempdir}/root" ${host_javabase_flag} \ + help completion >>"${tempdir}/output" + +[ -z "${append}" ] || cat ${append} >>"${tempdir}/output" + +rm -f "${output}" +mv "${tempdir}/output" "${output}" |