.setup_base_env

##!/bin/bash

# ~/.setup_basic_env
# Basic environment setup, including PATH


##############################################################
#-------------------------------------------------------------
# Custom shell variables and early exports
#-------------------------------------------------------------
##############################################################

# For filename expansion, ignore filename matches that match any of the colon-separated globs in 'GLOBIGNORE'. Honors the setting of the extglob shell options
#-------------------------------------------------------------
#export GLOBIGNORE=".:.."	#How often do you REALLY want a glob to match "." or ".."?

# Don't auto-complete files with the following file extensions
#-------------------------------------------------------------
export FIGNORE=".dll:.DLL:.ax" #:.DS_Store:.pyc:.pyd:

# Treat files (with executable-bit set) matching these globs as not being on the PATH.
# Does not affect commands already in the hash, or bash's `[` `[[` and `test` commands.
#-------------------------------------------------------------
#export EXECIGNORE=""

# Must press ctrl+D 1+$IGNOREEOF times to exit shell...
# because I've accidentally'd my shell a few times too many when trying to send ctrl+D while suffering input delay
#-------------------------------------------------------------
export IGNOREEOF="1"

# Set arguments to automatically pass to the less pager; git pager needs to include -R and -F for git commands to behave nicely, but including -F in LESS affects man, so the -F should be handled in the gitconfig and/or aliases for less/man/git.
LESS="-R -PM ?f%f .?n?m(%T %i of %m) ..?ltlines %lt-%lb?L/%L. :byte %bB?s/%s. .?e(END) ?x- Next\: %x.:?pB%pB\%..   ?f(Press v to open with default editor).%t"
# --show-preproc-errors --modelines 2?
less_ver_compat(){
	# Add various flags to LESS if the installed version is new enough to understand them (rather than complain and immediately exit with return code 0).
	# Unfortunately, there seems to be no good way of removing both a suffix and a prefix in the same assignment,
	# but assigning multiple times in the same command works.
	ver="$(less -V)" ver="${ver#less }" ver="${ver%% \(*}"; # The parenthesis in the 3rd assignment needs to be escaped for Zsh compat.
	[ "0${ver}" -ge 549 ] && LESS="--no-histdups --wheel-lines=3 ${LESS}"
	[ "0${ver}" -ge 621 ] && LESS="--wordwrap ${LESS}"
	[ "0${ver}" -ge 624 ] && LESS="--proc-backspace ${LESS}"
}; less_ver_compat; unset -f less_ver_compat; unset ver;
export LESS

# Colored man pages: http://linuxtidbits.wordpress.com/2009/03/23/less-colors-for-man-pages/
# Less Colors for Man Pages
# Coloration seems to behave strangely at times, but oh well.
#export LESS_TERMCAP_mb=$'\E[01;31m'       # begin blinking
#export LESS_TERMCAP_md=$'\E[01;38;5;74m'  # begin bold
#export LESS_TERMCAP_me=$'\E[0m'           # end mode
#export LESS_TERMCAP_se=$'\E[0m'           # end standout-mode
#export LESS_TERMCAP_so=$'\E[7;33;40m'     # begin standout-mode - info box
#export LESS_TERMCAP_ue=$'\E[0m'           # end underline
#export LESS_TERMCAP_us=$'\E[04;38;5;146m' # begin underline

export LESSCHARSET='utf-8'

# Wait 4000 ms without receiving input before displaying the status message to tell the user it's still waiting.
export LESS_DATA_DELAY=4000

# Allow different preferred editors for local and remote sessions
if [ -n "$SSH_CONNECTION" ]; then
	export EDITOR="/usr/bin/nano"
	# export VISUAL="/usr/bin/nano"
else
	export EDITOR="/usr/bin/nano"
	# Example of dynamically selecting VISUAL according to availability of a graphic environment:
	#	"$(if [ -n $DISPLAY ]; then echo GRAPHICAL_TEXT_EDITOR; else echo '/usr/bin/nano'; fi)"
	# export VISUAL="/usr/bin/nano"
fi
command -v sudo >/dev/null 2>&1 && export SUDO_EDITOR="$EDITOR"

export TIME_STYLE="+%b %_2d, %_Y %_2I:%02M %p"
# export LANG='en_US.UTF-8'
export GCC_COLORS=1

export CARGO_HOME="${HOME}/.cargo"
export RUSTUP_HOME="${HOME}/.cargo"

export DOTNET_CLI_TELEMETRY_OPTOUT=1
# Proposed common opt-out: https://consoledonottrack.com
export DO_NOT_TRACK=1

# Enable accessibility for Qt; not sure what this will actually do in the absence of an X11 session
# This is commonly set by one of the startup scripts in /etc/X11/Xsession.d/
QT_ACCESSIBILITY="${QT_ACCESSIBILITY:-1}"

# Eventually, I'd like to move this to a dedicated "compat" file for sourcing
# On some DE/WM, this package and variable will help maintain a uniform theme for Qt5 applications
command -v qt5ct >/dev/null 2>&1 && export QT_QPA_PLATFORMTHEME=qt5ct

# Make Python use UTF-8 encoding for output to stdin/stdout/stderr.
#-------------------------------------------------------------
export PYTHONIOENCODING="UTF-8"

# Disallow pip from installing packages outside of a virtualenv
#-------------------------------------------------------------
#export PIP_REQUIRE_VIRTUALENV=true

# Config file path variables
#-------------------------------------------------------------
export BAT_CONFIG_PATH="${HOME}/.config/bat/config"
export RIPGREP_CONFIG_PATH="${HOME}/.config/ripgrep/.ripgreprc"
export HTML_TIDY="${HOME}/.config/html_tidy/.tidyrc"

##############################################################
#-------------------------------------------------------------
# Helper Functions
#-------------------------------------------------------------
##############################################################

# Adds to the $PATH variable, if path not already present
# Default is to prepend to $PATH
# Add "after" to append to $PATH
# function pathmunge () {
	# if ! echo "$PATH" | $(/bin/grep -Eq "(^|:)$1($|:)") ; then	# try calling grep in subshell for potential slight performance boost
		# if [ "$2" = "after" ] ; then
			# PATH="$PATH:$1"
		# else
			# PATH="$1:$PATH"
		# fi
	# fi
# }

# Does the same thing as pathmunge, but for MANPATH
# function manpathmunge () {
# 	if ! echo "$MANPATH" | $(/bin/grep -Eq "(^|:)$1($|:)") ; then
# 		if [ "$2" = "after" ] ; then
# 			MANPATH="$MANPATH:$1"
# 		else
# 			MANPATH="$1:$MANPATH"
# 		fi
# 	fi
# }

# Hopefully faster alternative to pathmunge; appends by default
function pathadd() {
	# Prepend/append to path, without duplicates
	# NOTE: be careful of path strings which are still valid if a variable in it is null or unset.
	case "$1" in
		"--prepend")
			shift # Clearly we don't want PATH to be "--prepend:$PATH"
			[ -d "$1" ] && [[ ":$PATH:" != *":$1:"* ]] && \
			export PATH="$1${PATH:+:${PATH}}"
			;;
		"--append")
			shift
			;& # Intentionally fall through to default case
		*)
			[ -d "$1" ] && [[ ":$PATH:" != *":$1:"* ]] && \
			export PATH="${PATH:+${PATH}:}$1"
			;;
	esac
}

# Hopefully faster alternative to manpathmunge; appends by default
function manpathadd() {
	# Prepend/append to manpath, without duplicates
	# NOTE: be careful of path strings which are still valid if a variable in it is null or unset.
	case "$1" in
		"--prepend")
			shift # Clearly we don't want MANPATH to be "--prepend:$MANPATH"
			[ -d "$1" ] && [[ ":$MANPATH:" != *":$1:"* ]] && \
			export MANPATH="$1${MANPATH:+:${MANPATH}}"
			;;
		"--append")
			shift
			;& # Intentionally fall through to default case
		*)
			[ -d "$1" ] && [[ ":$MANPATH:" != *":$1:"* ]] && \
			export MANPATH="${MANPATH:+${MANPATH}:}$1"
			;;
	esac
}

#Check if a particular directory is on the PATH
function checkpath(){
	case ":$PATH:" in
	*:"$1":*) echo "'$1' is on the PATH";;
	*) echo "'$1' is not on the PATH";;
	esac
}

seemsLikeWSL(){	# May want to add an OS check here too, just to be safe.
	# Return 0 if the system appears to be WSL; return 1 otherwise
	# [ -n $(command -v wsl) -o -n $(command -v wsl.exe) ] && \
		# return 0 || \
		# return 1
	grep -q Microsoft /proc/version
}

##############################################################
#-------------------------------------------------------------
# Additions to PATH
#-------------------------------------------------------------
##############################################################

# Try to use /env/environment for the default system path; Fully reconstruct PATH to prevent pollution by calls to `source`
# This is most likely a very less-than-ideal method of doing so, but it's worked for several months, and I lack better ideas.
# NOTE: this might have been a typo for /etc/environment, and should be verified
if [ -r "/env/environment" ]; then
	# FIXME: Honestly, this probably isn't the greatest idea, so I should probably do away with it...
	PATH=$(/usr/bin/cat /env/environment)
	PATH="${PATH:6:-1}"
else
	# shellcheck disable=SC3028
	if [ "$OSTYPE" = 'msys' ]; then
		# Best guess at a default path for msys (or cygwin, but I don't use that personally)
		PATH="/usr/local/bin:/usr/bin:/bin:/opt/bin"
	else
		# Best guess at a default system path on a unix/linux system
		PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
	fi
fi

if [ -n "$MINGW_PREFIX" ]; then
	# If using MINGW, specifically NOT the MSYS2 compat layer,
	# this MUST be before other standard system paths,
	# but should still come AFTER paths used for personal scripts,
	# such that a wrapper script can "shadow" a binary from the relevant MINGW environment.
	
	PATH="${MINGW_PREFIX}/bin:$PATH"
elif [ -n "$MSYSTEM" ]; then
	# If using MSYS2, specifically NOT MINGW, it may still be good to have MINGW binaries in the PATH.
	# Of course, since I'll primarily be using things for MSYS2 in that case, the MINGW binaries
	# should be AFTER the MSYS2 binaries on the PATH, such that only binaries installed for a MINGW 
	# environment will be callable without explicit prefixing.
	
	if [ -r '/mingw64/bin' ]; then
		PATH="$PATH:/mingw64/bin"
	elif [ -r '/mingw32/bin' ]; then
		# If ever I want to use anything MINGW, I'll use MINGW64 when possible.
		PATH="$PATH:/mingw32/bin"
	else
		# shellcheck disable=SC2016
		printf 'WARNING: $MSYSTEM has been assigned to an unrecognized value of "%s". There may be unexpected or missing PATH entries.\n' "$MSYSTEM"
	fi
fi

[ -v CARGO_HOME ] && PATH="$CARGO_HOME/bin:$PATH" # Insert before system binary locations, but not before user binary locations.
[ -d "${HOME}/.local/bin" ] && PATH="${HOME}/.local/bin:$PATH"
[ -d "${HOME}/bin" ] && PATH="${HOME}/bin:$PATH"

# Don't add this clutter to the path if aliases have already been generated through generateAll.sh;
# the aliases will be sourced in .bashrc if they exist in the user's home directory
if [ ! -r ~/.winAliases ] || [ ! -r ~/.sys32Aliases ]; then
	# !!TODO: Script that creates aliases for things in /c/Windows/System32/Wbem
	# shellcheck disable=SC3028
	if [ "$OSTYPE" = 'msys' ]; then
		PATH="$PATH:/c/Windows/System32:/c/Windows:/c/Windows/System32/Wbem:/c/Windows/System32/WindowsPowerShell/v1.0/"
	elif seemsLikeWSL; then
		# System is most likely WSL
		PATH="$PATH:/mnt/c/Windows/System32:/mnt/c/Windows:/mnt/c/Windows/System32/WindowsPowerShell/v1.0/"
	fi
fi

# shellcheck disable=SC3028
[ "$OSTYPE" = 'msys' ] && PATH="$PATH:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl"

##############################################################
#-------------------------------------------------------------
# Additions to MANPATH
#-------------------------------------------------------------
##############################################################

# In general, try to avoid using this if possible. Man tends to do a better job at this than we users do,
# and packages installed through the system package manager especially tend to put their manpages somewhere
# that man has no trouble finding them.
#
# I don't currently install anything that would have me adding to MANPATH with both msys and unix/linux systems

##############################################################
#-------------------------------------------------------------
# Load sensitive and machine-specific environment settings
#-------------------------------------------------------------
##############################################################

if [ -r "${HOME}/.setup_machine_env" ]; then
	. "${HOME}/.setup_machine_env"
fi

export PATH #MANPATH