X-Git-Url: https://feistymeow.org/gitweb/?a=blobdiff_plain;f=scripts%2Fcore%2Ffunctions.sh;h=4ace5d80f3cbfad44ae81041fccfeafca20bda86;hb=e768391ab81b189397f0fd19827999365f8b3e33;hp=9dcfce80b35a5565c50868bf5f8cecb5707b24d9;hpb=086c15677bb5993d61983f5b79c9a31dc1d15e1d;p=feisty_meow.git

diff --git a/scripts/core/functions.sh b/scripts/core/functions.sh
index 9dcfce80..4ace5d80 100644
--- a/scripts/core/functions.sh
+++ b/scripts/core/functions.sh
@@ -49,6 +49,8 @@ if [ -z "$skip_all" ]; then
     return $?
   }
 
+  ##############
+
   # displays the value of a variable in bash friendly format.
   function var() {
     HOLDIFS="$IFS"
@@ -84,6 +86,8 @@ if [ -z "$skip_all" ]; then
     IFS="$HOLDIFS"
   }
 
+  ##############
+
   # when passed a list of things, this will return the unique items from that list as an echo.
   function uniquify()
   {
@@ -104,6 +108,8 @@ if [ -z "$skip_all" ]; then
     fi
   }
 
+  ##############
+
   function success_sound()
   {
     if [ ! -z "$CLAM_FINISH_SOUND" ]; then
@@ -118,13 +124,27 @@ if [ -z "$skip_all" ]; then
     fi
   }
 
+  ##############
+
+  # echoes the maximum number of columns that the terminal supports.  usually
+  # anything you print to the terminal with length less than (but not equal to)
+  # maxcols will never wrap.
+  function get_maxcols()
+  {
+    # calculate the number of columsn in the terminal.
+    local cols=$(stty size | awk '{print $2}')
+    echo $cols
+  }
+
+  ##############
+
   # checks the result of the last command that was run, and if that failed,
   # then this complains and exits from bash.  the function parameters are
   # used as the message to print as a complaint.
   function test_or_die()
   {
     if [ $? -ne 0 ]; then
-      echo -e "\n\naction failed: $*\n\nExiting script..."
+      echo -e "\n\naction failed: $*\n\n*** Exiting script..."
       error_sound
       exit 1
     fi
@@ -134,24 +154,34 @@ if [ -z "$skip_all" ]; then
   function test_or_continue()
   {
     if [ $? -ne 0 ]; then
-      echo -e "\n\nerror occurred: $*\n\nContinuing script..."
+      echo -e "\n\nerror occurred: $*\n\n=> Continuing script..."
       error_sound
     fi
   }
 
+  ##############
+
   # wraps secure shell with some parameters we like, most importantly to enable X forwarding.
   function ssh()
   {
     local args=($*)
-    save_terminal_title
     # we remember the old terminal title, then force the TERM variable to a more generic
     # version for the other side (just 'linux'); we don't want the remote side still
     # thinking it's running xterm.
-    export TERM=linux
+    save_terminal_title
+#hmmm: why were we doing this?  it scorches the user's logged in session, leaving it without proper terminal handling.
+#    # we save the value of TERM; we don't want to leave the user's terminal
+#    # brain dead once we come back from this function.
+#    local oldterm="$TERM"
+#    export TERM=linux
     /usr/bin/ssh -X -C "${args[@]}"
+#    # restore the terminal variable also.
+#    TERM="$oldterm"
     restore_terminal_title
   }
 
+  ##############
+
   # locates a process given a search pattern to match in the process list.
   # supports a single command line flag style parameter of "-u USERNAME";
   # if the -u flag is found, a username is expected afterwards, and only the
@@ -267,6 +297,9 @@ if [ -z "$skip_all" ]; then
     fi
   }
   
+  ##############
+
+#hmmm: holy crowbars, this is an old one.  do we ever still have any need of it?
   # an unfortunately similarly named function to the above 'ps' as in process
   # methods, but this 'ps' stands for postscript.  this takes a postscript file
   # and converts it into pcl3 printer language and then ships it to the printer.
@@ -280,9 +313,21 @@ if [ -z "$skip_all" ]; then
     done
   }
   
-#  function fix_alsa() {
-#    sudo /etc/init.d/alsasound restart
-#  }
+#hmmm: not really doing anything yet; ubuntu seems to have changed from pulseaudio in 17.04?
+  # restarts the sound driver.
+  function fix_sound_driver() {
+    # stop bash complaining about blank function body.
+    local nothing=
+#if alsa something
+#    sudo service alsasound restart
+#elif pulse something
+#    sudo pulseaudio -k
+#    sudo pulseaudio -D
+#else
+#    something else...?
+#fi
+
+  }
 
   function screen() {
     save_terminal_title
@@ -363,14 +408,15 @@ if [ -z "$skip_all" ]; then
   # sudo function wraps the normal sudo by ensuring we replace the terminal
   # label if they're doing an su with the sudo.
   function sudo() {
-#    local first_command="$1"
     save_terminal_title
     /usr/bin/sudo "$@"
+    retval=$?
     restore_terminal_title
 #    if [ "$first_command" == "su" ]; then
 #      # yep, they were doing an su, but they're back now.
 #      label_terminal_with_info
 #    fi
+    return $retval
   }
   
   # trashes the .#blah files that cvs and subversion leave behind when finding conflicts.
@@ -406,6 +452,7 @@ if [ -z "$skip_all" ]; then
     unalias CORE_ALIASES_LOADED &>/dev/null
     unset -f function_sentinel 
     # reload feisty meow environment in current shell.
+    echo "reloading the feisty meow scripts."
     source "$FEISTY_MEOW_SCRIPTS/core/launch_feisty_meow.sh"
     # run nechung oracle to give user a new fortune.
     nechung
@@ -430,13 +477,24 @@ if [ -z "$skip_all" ]; then
       echo "but that folder does not exist.  Skipping customization."
       return 1
     fi
+
+    # prevent permission foul-ups.
+#hmmm: save error output here instead of muting it.
+#hmmm: better yet actually, just don't complain on freaking cygwin, since that's where this happens
+    chown -R "$(logname):$(logname)" \
+        "$FEISTY_MEOW_LOADING_DOCK"/* "$FEISTY_MEOW_GENERATED_STORE"/* 2>/dev/null
+    test_or_continue "chowning to $(logname) didn't happen."
+
     regenerate >/dev/null
     pushd "$FEISTY_MEOW_LOADING_DOCK/custom" &>/dev/null
     incongruous_files="$(bash "$FEISTY_MEOW_SCRIPTS/files/list_non_dupes.sh" "$FEISTY_MEOW_SCRIPTS/customize/$custom_user" "$FEISTY_MEOW_LOADING_DOCK/custom")"
 
-    local fail_message="\nare the perl dependencies installed?  if you're on ubuntu or debian, try this:\n
-    $(grep "apt.*perl" $FEISTY_MEOW_APEX/readme.txt)\n"
-    
+    local fail_message="\n
+are the perl dependencies installed?  if you're on ubuntu or debian, try this:\n
+    $(grep "apt-get.*perl" $FEISTY_MEOW_APEX/readme.txt)\n
+or if you're on cygwin, then try this (if apt-cyg is available):\n
+    $(grep "apt-cyg.*perl" $FEISTY_MEOW_APEX/readme.txt)\n";
+
     #echo "the incongruous files list is: $incongruous_files"
     # disallow a single character result, since we get "*" as result when nothing exists yet.
     if [ ${#incongruous_files} -ge 2 ]; then
@@ -453,12 +511,18 @@ if [ -z "$skip_all" ]; then
 
     if [ -d "$FEISTY_MEOW_SCRIPTS/customize/$custom_user/scripts" ]; then
       echo "copying custom scripts for $custom_user"
-      netcp "$FEISTY_MEOW_SCRIPTS/customize/$custom_user/scripts" "$FEISTY_MEOW_LOADING_DOCK/custom/" &>/dev/null
+      rsync -avz "$FEISTY_MEOW_SCRIPTS/customize/$custom_user/scripts" "$FEISTY_MEOW_LOADING_DOCK/custom/" &>/dev/null
+      test_or_continue "copying customization scripts"
 #hmmm: could save output to show if an error occurs.
     fi
     echo
     regenerate
 
+    # prevent permission foul-ups, again.
+    chown -R "$(logname):$(logname)" \
+        "$FEISTY_MEOW_LOADING_DOCK" "$FEISTY_MEOW_GENERATED_STORE" 2>/dev/null
+    test_or_continue "chowning to $(logname) didn't happen."
+
     restore_terminal_title
   }
 
@@ -802,6 +866,69 @@ return 0
 
   ##############
 
+  # given a filename and a string to seek and a number of lines, then this
+  # function will remove the first occurrence of a line in the file that
+  # matches the string, and it will also axe the next N lines as specified.
+  function create_chomped_copy_of_file()
+  {
+    local filename="$1"; shift
+    local seeker="$1"; shift
+    local numlines=$1; shift
+
+#echo into create_chomped_copy...
+#var filename seeker numlines 
+
+    # make a backup first, oy.
+    \cp -f "$filename" "/tmp/$(basename ${filename}).bkup-${RANDOM}" 
+    test_or_die "backing up file: $filename"
+
+    # make a temp file to write to before we move file into place in bind.
+    local new_version="/tmp/$(basename ${filename}).bkup-${RANDOM}" 
+    \rm -f "$new_version"
+    test_or_die "cleaning out new version of file from: $new_version"
+
+    local line
+    local skip_count=0
+    local found_any=
+    while read line; do
+      # don't bother looking at the lines if we're already in skip mode.
+      if [[ $skip_count == 0 ]]; then
+        # find the string they're seeking.
+        if [[ ! "$line" =~ .*${seeker}.* ]]; then
+          # no match.
+          echo "$line" >> "$new_version"
+        else
+          # a match!  start skipping.  we will delete this line and the next N lines.
+          ((skip_count++))
+#echo first skip count is now $skip_count
+          found_any=yes
+        fi
+      else
+        # we're already skipping.  let's keep going until we hit the limit.
+        ((skip_count++))
+#echo ongoing skip count is now $skip_count
+        if (( $skip_count > $numlines )); then
+          echo "Done skipping, and back to writing output file."
+          skip_count=0
+        fi
+      fi
+    done < "$filename"
+
+#echo file we created looks like this:
+#cat "$new_version"
+
+    if [ ! -z "$found_any" ]; then
+      # put the file back into place under the original name.
+      \mv "$new_version" "$filename"
+      test_or_die "moving the new version into place in: $filename"
+    else
+      # cannot always be considered an error, but we can at least gripe.
+      echo "Did not find any matches for seeker '$seeker' in file: $filename"
+    fi
+  }
+
+  ##############
+
   # NOTE: no more function definitions are allowed after this point.
 
   function function_sentinel()