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125 lines
3.5 KiB
125 lines
3.5 KiB
4 months ago
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#!/bin/bash
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# diag-build: a tool showing enabled warnings in a project.
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#
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# diag-build acts as a wrapper for 'diagtool show-enabled', in the same way
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# that scan-build acts as a wrapper for the static analyzer. The common case is
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# simple: use 'diag-build make' or 'diag-build xcodebuild' to list the warnings
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# enabled for the first compilation command we see. Other build systems require
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# you to manually specify "dry-run" and "use $CC and $CXX"; if there is a build
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# system you are interested in, please add it to the switch statement.
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print_usage () {
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echo 'Usage: diag-build.sh [-v] xcodebuild [flags]'
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echo ' diag-build.sh [-v] make [flags]'
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echo ' diag-build.sh [-v] <other build command>'
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echo
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echo 'diagtool must be in your PATH'
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echo 'If using an alternate build command, you must ensure that'
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echo 'the compiler used matches the CC environment variable.'
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}
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# Mac OS X's BSD sed uses -E for extended regular expressions,
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# but GNU sed uses -r. Find out which one this system accepts.
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EXTENDED_SED_FLAG='-E'
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echo -n | sed $EXTENDED_SED_FLAG 's/a/b/' 2>/dev/null || EXTENDED_SED_FLAG='-r'
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if [[ "$1" == "-v" ]]; then
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verbose=$1
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shift
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fi
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guessing_cc=0
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if [[ -z "$CC" ]]; then
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guessing_cc=1
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if [[ -x $(dirname $0)/clang ]]; then
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CC=$(dirname $0)/clang
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elif [[ ! -z $(which clang) ]]; then
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CC=$(which clang)
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else
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echo -n 'Error: could not find an appropriate compiler'
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echo ' to generate build commands.' 1>&2
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echo 'Use the CC environment variable to set one explicitly.' 1>&2
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exit 1
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fi
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fi
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if [[ -z "$CXX" ]]; then
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if [[ -x $(dirname $0)/clang++ ]]; then
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CXX=$(dirname $0)/clang++
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elif [[ ! -z $(which clang++) ]]; then
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CXX=$(which clang++)
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else
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CXX=$CC
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fi
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fi
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diagtool=$(which diagtool)
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if [[ -z "$diagtool" ]]; then
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if [[ -x $(dirname $0)/diagtool ]]; then
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diagtool=$(dirname $0)/diagtool
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else
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echo 'Error: could not find diagtool.' 1>&2
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exit 1
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fi
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fi
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tool=$1
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shift
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if [[ -z "$tool" ]]; then
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print_usage
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exit 1
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elif [[ "$tool" == "xcodebuild" ]]; then
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dry_run='-dry-run'
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set_compiler="CC='$CC' CXX='$CXX'"
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elif [[ "$tool" == "make" ]]; then
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dry_run='-n'
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set_compiler="CC='$CC' CXX='$CXX'"
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else
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echo "Warning: unknown build system '$tool'" 1>&2
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if [[ $guessing_cc -eq 1 ]]; then
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# FIXME: We really only need $CC /or/ $CXX
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echo 'Error: $CC must be set for other build systems' 1>&2
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exit 1
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fi
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fi
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escape () {
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echo $@ | sed 's:[]:\\|/.+*?^$(){}[]:\\&:g'
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}
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escCC=$(escape $CC)
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escCXX=$(escape $CXX)
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command=$(
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eval $tool $dry_run $set_compiler $@ 2>/dev/null |
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# Remove "if" early on so we can find the right command line.
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sed $EXTENDED_SED_FLAG "s:^[[:blank:]]*if[[:blank:]]{1,}::g" |
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# Combine lines with trailing backslashes
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sed -e :a -e '/\\$/N; s/\\\n//; ta' |
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grep -E "^[[:blank:]]*($escCC|$escCXX)" |
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head -n1 |
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sed $EXTENDED_SED_FLAG "s:($escCC|$escCXX):${diagtool//:/\\:} show-enabled:g"
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)
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if [[ -z "$command" ]]; then
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echo 'Error: could not find any build commands.' 1>&2
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if [[ "$tool" != "xcodebuild" ]]; then
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# xcodebuild always echoes the compile commands on their own line,
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# but other tools give no such guarantees.
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echo -n 'This may occur if your build system embeds the call to ' 2>&1
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echo -n 'the compiler in a larger expression. ' 2>&1
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fi
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exit 2
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fi
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# Chop off trailing '&&', '||', and ';'
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command=${command%%&&*}
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command=${command%%||*}
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command=${command%%;*}
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[[ -n "$verbose" ]] && echo $command
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eval $command
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