docs: update

README.md

@@ -32,9 +32,10 @@ _/\ __)/_)    pkgs   130
 
 - [ ] Add optional and additional information detection.
     - [ ] CPU
-    - [ ] Terminal Emulator
+    - [ ] Terminal Emulator ([#12](https://github.com/dylanaraps/pfetch/pull/12))
         - The way I implement this in `neofetch` is interesting.
-    - [ ] Terminal colors
+    - [x] Terminal colors ([commit](https://github.com/dylanaraps/pfetch/commit/ba03cb3cf4dfbc767abce6acd53c07ab5568e23d))
+    - [ ] Window manager ([#13](https://github.com/dylanaraps/pfetch/pull/13))
     - [ ] ???
 - [ ] Expand operating system support.
     - [ ] Solaris ([#5](https://github.com/dylanaraps/pfetch/issues/5))
@@ -46,7 +47,7 @@ _/\ __)/_)    pkgs   130
         - [ ] CYGWIN
         - [ ] MSYS
         - [ ] MINGW
-        - [ ] WSL (*this is fairly simple*)
+        - [x] WSL (*this is fairly simple*)
 
 ## Configuration
 
@@ -58,7 +59,7 @@ _/\ __)/_)    pkgs   130
 # Default: first example below
 # Valid: space separated string
 #
-# OFF by default: shell
+# OFF by default: shell palette
 PF_INFO="ascii title distro host kernel uptime pkgs memory"
 
 # Example: Only ASCII.

pfetch

@@ -154,6 +154,12 @@ get_os() {
             if command -v lsb_release; then
                 distro=$(lsb_release -sd)
 
+                # lsb_release sometimes adds quotes around the output,
+                # this simply remove quotes from the start/end if they
+                # exist.
+                distro=${distro##\"}
+                distro=${distro%%\"}
+
             else
                 # Disable warning about shellcheck not being able
                 # to read '/etc/os-release'. This is fine.
@@ -165,6 +171,19 @@ get_os() {
             # don't follow any os-release/lsb standards whatsoever.
             command -v crux        && distro=$(crux)
             command -v guix        && distro='Guix System'
+
+            # Check to see if Linux is running in Windows 10 under
+            # WSL (Windows subsystem for Linux) and append a string
+            # accordingly.
+            #
+            # If the kernel version string ends in "-Microsoft",
+            # we're very likely running under Windows 10 in WSL.
+            #
+            # This also acts as a means of allowing the user to
+            # fake this by changing their kernel version to end in
+            # "Microsoft".
+            [ "${kernel%%*-Microsoft}" ] ||
+                distro="$distro on Windows 10"
         ;;
 
         Darwin*)
@@ -240,6 +259,10 @@ get_kernel() {
    esac
 }
 
+get_shell() {
+    log shell "${SHELL##*/}" >&6
+}
+
 get_host() {
     case $os in
         Linux*)
@@ -352,6 +375,10 @@ get_uptime() {
 }
 
 get_pkgs() {
+    # This is just a simple wrapper around 'command -v' to avoid
+    # spamming '>/dev/null' throughout this function.
+    has() { command -v "$1" >/dev/null; }
+
     # This works by first checking for which package managers are
     # installed and finally by printing each package manager's
     # package list with each package one per line.
@@ -372,27 +399,27 @@ get_pkgs() {
         case $os in
             Linux*)
                 # Commands which print packages one per line.
-                command -v kiss       && kiss l
-                command -v bonsai     && bonsai list
-                command -v pacman-key && pacman -Qq
-                command -v dpkg       && dpkg-query -f '.\n' -W
-                command -v rpm        && rpm -qa
-                command -v xbps-query && xbps-query -l
-                command -v apk        && apk info
+                has kiss       && kiss l
+                has bonsai     && bonsai list
+                has pacman-key && pacman -Qq
+                has dpkg       && dpkg-query -f '.\n' -W
+                has rpm        && rpm -qa
+                has xbps-query && xbps-query -l
+                has apk        && apk info
 
                 # Directories containing packages.
-                command -v brew       && printf '%s\n' "$(brew --cellar)/"*
-                command -v emerge     && printf '%s\n' /var/db/pkg/*/*/
-                command -v pkgtool    && printf '%s\n' /var/log/packages/*
+                has brew       && printf '%s\n' "$(brew --cellar)/"*
+                has emerge     && printf '%s\n' /var/db/pkg/*/*/
+                has pkgtool    && printf '%s\n' /var/log/packages/*
 
                 # GUIX requires two commands.
-                command -v guix       && {
+                has guix       && {
                     guix package -p /run/current-system/profile -I
                     guix package -I
                 }
 
                 # NIX requires two commands.
-                command -v nix-store  && {
+                has nix-store  && {
                     nix-store -q --requisites /run/current-system/sw
                     nix-store -q --requisites ~.nix-profile
                 }
@@ -400,11 +427,11 @@ get_pkgs() {
 
             Darwin*)
                 # Commands which print packages one per line.
-                command -v pkgin      && pkgin list
-                command -v port       && port installed
+                has pkgin      && pkgin list
+                has port       && port installed
 
                 # Directories containing packages.
-                command -v brew       && printf '%s\n' /usr/local/Cellar/*
+                has brew       && printf '%s\n' /usr/local/Cellar/*
             ;;
 
             FreeBSD*)
@@ -572,128 +599,19 @@ get_memory() {
     log memory "${mem_used:-?}M / ${mem_full:-?}M" >&6
 }
 
-get_term() {
-    # Workaround for macOS systems that don't support the
-    # "algorithm" of obtaining the terminal program name.
+get_palette() {
+    # Print the first 8 terminal colors. This uses the existing
+    # sequences to change text color with a sequence prepended
+    # to reverse the foreground and background colors.
     #
-    # This also doubles as a means of allowing the user to
-    # set whatever value they like here through the
-    # '$TERM_PROGRAM' environment variable.
-    case $TERM_PROGRAM in
-        iTerm.app)    term=iTerm2 ;;
-        Terminal.app) term='Apple Terminal' ;;
-        Hyper)        term=HyperTerm ;;
-        *)            term=${TERM_PROGRAM%%.app} ;;
-    esac
+    # This allows us to save hardcoding a second set of sequences
+    # for background colors.
+    palette="  $c1  $c2  $c3  $c4  $c5  $c6  $c7  "
 
-    # Special case for TosWin2 (FreeMiNT) which doesn't
-    # support the "algorithm" of obtaining the terminal
-    # program name.
-    [ "$TERM" = tw52 ] || [ "$TERM" = tw100 ] &&
-        term=TosWin2
-
-    # Special case for when 'pfetch' is run over SSH.
-    [ "$SSH_CONNECTION" ] &&
-        term=$SSH_TTY
-
-    # This surprisingly reliable method of detecting the current
-    # terminal emulator is kinda neat.
-    #
-    # It works by looping through each parent of each process
-    # starting with '$PPID' (the parent process ID) until we
-    # find a match or hit PID 1 (init).
-    #
-    # On each iteration the name of the current parent process
-    # is checked against a list of good values and bad values.
-    # If no match is found we check the parent of the parent
-    # and so on.
-    #
-    # Using this method *no* terminal emulator names are
-    # hardcoded and the list remains small and general. In short
-    # it's basically a list of what *isn't* a terminal emulator
-    # and a list of places we should *stop*.
-    while [ -z "$term" ]; do
-        # This block is OS-specific and handles the fetching of
-        # the parent process (of the parent) and the fetching of
-        # said process' name.
-        case $os in
-            Linux*)
-                # On Linux some implementation of 'ps' aren't POSIX
-                # compliant, thankfully Linux provides this information
-                # though the '/proc' filesystem.
-                #
-                # This loops line by line over the '/proc/PID/status'
-                # file splitting at ':' and '<TAB>', we then look for
-                # the key containing 'PPid' and grab the value.
-                while IFS=':	' read -r key val; do
-                    case $key in
-                        PPid)
-                            ppid=$val
-                            break
-                        ;;
-                    esac
-                done < "/proc/${ppid:-$PPID}/status"
-
-                # Get the name of the parent process.
-                read -r name < "/proc/$ppid/comm"
-            ;;
-
-            Windows*)
-                # I need some assistance to add Windows support
-                # as the 'ps' command used in MINGW, MSYS and CYGWIN
-                # isn't POSIX compliant(?).
-                return
-            ;;
-
-            *)
-                # POSIX compliant 'ps' makes this really easy,
-                # just two simple commands to grab the parent
-                # process ID and the ID's name.
-                ppid=$(ps -p "${ppid:-$PPID}" -o ppid=)
-                name=$(ps -p "$ppid"          -o comm=)
-            ;;
-        esac
-
-        # Check the parent process name against a list of good and bad
-        # values. On a bad value we either keep iterating up the parent
-        # process list or we stop altogether (PID 1 for example).
-        case $name in
-            # If the parent process name matches the user's shell (or
-            # anything that looks like a shell), do another iteration.
-            #
-            # This also includes 'screen' and anything that looks like
-            # 'su' or 'sudo'.
-            ${SHELL##*/} | *sh | screen | su* ) ;;
-
-            # If the parent process name matches 'login', 'init' or
-            # '*Login*' we're most likely in the TTY and not a graphical
-            # session. In this case 'term' is set to the current TTY and
-            # we end here.
-            login* | *Login* | init)
-                term=$(tty)
-            ;;
-
-            # If the parent process name matches anything in this list
-            # we can no longer continue. We've either hit PID 1 or a parent
-            # which *won't* lead to the terminal emulator's PID.
-            ruby      | systemd  | python*  | 1  | sshd* | tmux* |\
-            USER*PID* | kdeinit* | launchd* | '' )
-                break
-            ;;
-
-            # If none of the above have matched we've reached the terminal
-            # emulator's PID and we can end here.
-            *)
-                term=${name##*/}
-            ;;
-        esac
-    done
-
-    [ "$term" ] && log term "$term" >&6
-}
-
-get_shell() {
-    log shell "${SHELL##*/}" >&6
+    # Print the palette with a newline before and after.
+    # The '\033[%sC' moves the text to the right, the
+    # length of the ascii art.
+    printf '\n[%sC%s\n' "${ascii_width-1}" "$palette" >&6
 }
 
 get_ascii() {
@@ -1170,7 +1088,7 @@ main() {
         # Disable globbing and set the positional parameters to the
         # contents of 'PF_INFO'.
         set -f
-        set +f ${PF_INFO-ascii title os host kernel term uptime pkgs memory}
+        set +f ${PF_INFO-ascii title os host kernel uptime pkgs memory}
 
         # Iterate over the info functions to determine the lengths of the
         # "info names" for output alignment. The option names and subtitles