ansible/hacking/env-setup
Vincent Bernat 4afc228108
hacking: replace use of "which" with "command -v" ()
"command -v" is the POSIX compliant way to get the path to a command.
It returns the path to the command if it exists and exits with a
non-zero status when it does not, without any output. "which" is not
POSIX and it can have various different effects. With Zsh, it says
"python not found" on stdout.

See:
 - https://pubs.opengroup.org/onlinepubs/009695399/utilities/command.html

Signed-off-by: Vincent Bernat <vincent@bernat.ch>
2020-08-18 11:31:28 -04:00

105 lines
2.9 KiB
Text

# usage: source hacking/env-setup [-q]
# modifies environment for running Ansible from checkout
# prepend a value to a potentially empty path variable
# usage: prepend_path variable_name value
prepend_path()
{
variable_name="$1"
value="$2"
old_value=$( eval "echo \$$variable_name" )
if [ "x$old_value" != "x" ]; then
value="$value:"
fi
export "$variable_name=$value$old_value"
}
# Default values for shell variables we use
PYTHONPATH=${PYTHONPATH-""}
PATH=${PATH-""}
MANPATH=${MANPATH-$(manpath)}
PYTHON=$(command -v python || command -v python3)
PYTHON_BIN=${PYTHON_BIN-$PYTHON}
verbosity=${1-info} # Defaults to `info' if unspecified
if [ "$verbosity" = -q ]; then
verbosity=silent
fi
# When run using source as directed, $0 gets set to bash, so we must use $BASH_SOURCE
if [ -n "$BASH_SOURCE" ] ; then
HACKING_DIR=$(dirname "$BASH_SOURCE")
elif [ $(basename -- "$0") = "env-setup" ]; then
HACKING_DIR=$(dirname "$0")
# Works with ksh93 but not pdksh, have to eval to keep ash happy...
elif [ -n "$KSH_VERSION" ] && echo $KSH_VERSION | grep -qv '^@(#)PD KSH'; then
eval "HACKING_DIR=\$(dirname \"\${.sh.file}\")"
else
HACKING_DIR="$PWD/hacking"
fi
# The below is an alternative to readlink -fn which doesn't exist on macOS
# Source: http://stackoverflow.com/a/1678636
FULL_PATH=$($PYTHON_BIN -c "import os; print(os.path.realpath('$HACKING_DIR'))")
export ANSIBLE_HOME="$(dirname "$FULL_PATH")"
PREFIX_PYTHONPATH="$ANSIBLE_HOME/lib"
PREFIX_PATH="$ANSIBLE_HOME/bin"
PREFIX_MANPATH="$ANSIBLE_HOME/docs/man"
expr "$PYTHONPATH" : "${PREFIX_PYTHONPATH}.*" > /dev/null || prepend_path PYTHONPATH "$PREFIX_PYTHONPATH"
expr "$PATH" : "${PREFIX_PATH}.*" > /dev/null || prepend_path PATH "$PREFIX_PATH"
expr "$MANPATH" : "${PREFIX_MANPATH}.*" > /dev/null || prepend_path MANPATH "$PREFIX_MANPATH"
#
# Generate egg_info so that pkg_resources works
#
# Do the work in a function so we don't repeat ourselves later
gen_egg_info()
{
# check for current and past egg-info directory names
if ls "$PREFIX_PYTHONPATH"/ansible*.egg-info >/dev/null 2>&1; then
# bypass shell aliases with leading backslash
# see https://github.com/ansible/ansible/pull/11967
\rm -rf "$PREFIX_PYTHONPATH"/ansible*.egg-info
fi
$PYTHON_BIN setup.py egg_info
}
if [ "$ANSIBLE_HOME" != "$PWD" ] ; then
current_dir="$PWD"
else
current_dir="$ANSIBLE_HOME"
fi
(
cd "$ANSIBLE_HOME"
if [ "$verbosity" = silent ] ; then
gen_egg_info > /dev/null 2>&1 &
find . -type f -name "*.pyc" -exec rm -f {} \; > /dev/null 2>&1
else
gen_egg_info
find . -type f -name "*.pyc" -exec rm -f {} \;
fi
cd "$current_dir"
)
if [ "$verbosity" != silent ] ; then
cat <<- EOF
Setting up Ansible to run out of checkout...
PATH=$PATH
PYTHONPATH=$PYTHONPATH
MANPATH=$MANPATH
Remember, you may wish to specify your host file with -i
Done!
EOF
fi