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#!/usr/bin/env bash
## Commands defined by this file:
#
# * to_absolute <path>
# • Convert a given path into an absolute path. Relative paths are
# resolved relative to the working directory. Removes redundant directory
# separators.
# * native_path <path>
# • On MinGW/Cygwin/MSYS, convert the given Cygwin path to a Windows-native
# path. On other platforms, the argument is unmodified
#
## Variables set by this file:
#
# * TOOLS_DIR
# • The path to the directory containing this script file
# * MONGOC_DIR
# • The path to the top-level project directory
# * USER_CACHES_DIR (overridable)
# • A user-local directory in which to store cached data
# * BUILD_CACHE_DIR (overridable)
# • A user-local directory for caches related to these scripts
# * EXE_SUFFIX
# • Expands to “.exe” on Windows, otherwise an empty string
. "$(dirname "${BASH_SOURCE[0]}")/use.sh" platform base
# Check for Cygpath, used by various commands. Better to check once than check every time.
_HAVE_CYGPATH=false
if have-command cygpath; then
_HAVE_CYGPATH=true
fi
# Usage: native-path <path>
native-path() {
[[ "$#" -eq 1 ]] || fail "native_path expects exactly one argument"
local arg=$1
if $IS_WINDOWS; then
$_HAVE_CYGPATH || fail "No 'cygpath' command is available, but we require it to normalize file paths on Windows."
local ret
ret="$(cygpath -w "$arg")"
debug "Convert path [$arg] → [$ret]"
printf %s "$ret"
else
printf %s "$arg"
fi
}
# Usage: to_absolute <path>
to_absolute() {
[[ "$#" -eq 1 ]] || fail "to_absolute expects a single argument"
local ret
local arg="$1"
debug "Resolve path [$arg]"
# Cygpath can resolve the path in a single subprocess:
if $_HAVE_CYGPATH; then
# Ask Cygpath to resolve the path. It knows how to do it reliably and quickly:
ret=$(cygpath --absolute --mixed --long-name -- "$arg")
debug "Cygpath resolved: [$arg]"
printf %s "$ret"
return 0
fi
# If the given directory exists, we can ask the shell to resolve the path
# by going there and asking the PWD:
if is-dir "$arg"; then
ret=$(run-chdir "$arg" pwd)
debug "Resolved: [$arg]"
printf %s "$ret"
return 0
fi
# Do it the "slow" way:
# The parent path:
local _parent
_parent="$(dirname "$arg")"
# The filename part:
local _fname
_fname="$(basename "$arg")"
# There are four cases to consider from dirname:
if [[ $_parent = "." ]]; then # The parent is '.' as in './foo'
# Replace the leading '.' with the working directory
_parent="$(pwd)"
elif [[ $_parent = ".." ]]; then # The parent is '..' as in '../foo'
# Replace a leading '..' with the parent of the working directory
_parent="$(dirname "$(pwd)")"
elif [[ $arg == "$_parent" ]]; then # The parent is itself, as in '/'
# A root directory is its own parent according to 'dirname'
printf %s "$arg"
return 0
else # The parent is some other path, like 'foo' in 'foo/bar'
# Resolve the parent path
_parent="$(set +x; DEBUG=0 to_absolute "$_parent")"
fi
# At this point $_parent is an absolute path
if [[ $_fname = ".." ]]; then
# Strip one component
ret="$(dirname "$_parent")"
elif [[ $_fname = "." ]]; then
# Drop a '.' at the end of a path
ret="$_parent"
else
# Join the result
ret="$_parent/$_fname"
fi
# Remove duplicate dir separators
while [[ $ret =~ "//" ]]; do
ret="${ret//\/\///}"
done
debug "Resolved path: [$arg] → [$ret]"
printf %s "$ret"
}
# Get the TOOLS_DIR as a native absolute path. All other path vars are derived
# from this one, and will therefore remain as native pathsS
_this_file=$(to_absolute "${BASH_SOURCE[0]}")
_this_dir=$(dirname "$_this_file")
TOOLS_DIR=$(native-path "$_this_dir")
declare -r TOOLS_DIR=$TOOLS_DIR
MONGOC_DIR=$(dirname "$TOOLS_DIR")
declare -r MONGOC_DIR=$MONGOC_DIR
EXE_SUFFIX=""
if $IS_WINDOWS; then
EXE_SUFFIX=".exe"
fi
declare -r EXE_SUFFIX=$EXE_SUFFIX
if [[ "${USER_CACHES_DIR:=${XDG_CACHE_HOME:-}}" = "" ]]; then
if $IS_DARWIN; then
USER_CACHES_DIR=$HOME/Library/Caches
elif $IS_UNIX_LIKE; then
USER_CACHES_DIR=$HOME/.cache
elif $IS_WINDOWS; then
USER_CACHES_DIR=${LOCALAPPDATA:-$USERPROFILE/.cache}
else
log "Using ~/.cache as fallback user caching directory"
USER_CACHES_DIR="$(to_absolute ~/.cache)"
fi
fi
# Ensure we are dealing with a complete path
USER_CACHES_DIR="$(to_absolute "$USER_CACHES_DIR")"
declare -r USER_CACHES_DIR=$USER_CACHES_DIR
: "${BUILD_CACHE_BUST:=1}"
: "${BUILD_CACHE_DIR:="$USER_CACHES_DIR/mongoc/build.$BUILD_CACHE_BUST"}"
if is-main; then
# Just print the paths that we detected
log "Paths:"
log " • USER_CACHES_DIR=[$USER_CACHES_DIR]"
log " • BUILD_CACHE_DIR=[$BUILD_CACHE_DIR]"
log " • BUILD_CACHE_BUST=[$BUILD_CACHE_BUST]"
log " • EXE_SUFFIX=[$EXE_SUFFIX]"
log " • TOOLS_DIR=[$TOOLS_DIR]"
log " • MONGOC_DIR=[$MONGOC_DIR]"
fi
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