feat: .bashrc auto alias ssh VPS

1 files changed, 18 insertions, 2 deletions

diff --git a/home/xyz/.bashrc b/home/xyz/.bashrc
index 31347f31..5adab160 100644
--- a/home/xyz/.bashrc
+++ b/home/xyz/.bashrc
@@ -43,6 +43,24 @@ for cmd in loop o 'watch -c'; do
 done
 unset cmd
 
+# note: the following code pipe to while read will not work, because pipe create subshell
+#git -C "$HOME/programs/config_local_arch" branch | awk '{print ($1=="*")?$2:$1}' | grep -v master | while read -r branch; do
+# `man bash`: "Each command in a multi-command pipeline, where pipes are created, is executed in a subshell, which is a separate process."
+# https://stackoverflow.com/questions/56327528/bash-aliases-set-in-while-loop-not-persisting
+# can be tested via $BASHPID, note $$ will not work, because $$ does not show subshell pid
+# another way is: echo "$(exec sh -c 'echo "$PPID"')"
+# `man bash`:
+# > BASHPIP Expands to the process ID of the current bash process. This differs from $$ under certain circumstances, such as subshells that  do not  require bash to be re-initialized.
+# > $ Expands to the process ID of the shell. In a subshell, it expands to the process ID of the current shell, not the subshell.
+# https://unix.stackexchange.com/questions/484442/how-can-i-get-the-pid-of-a-subshell
+for branch in $(git -C "$HOME/programs/config_local_arch" branch | awk '{print ($1=="*")?$2:$1}' | grep -v master); do
+	case "$branch" in
+		master|studio|pp) ;;
+		*) alias "s$branch"="ssh $branch";;
+	esac
+done
+unset branch
+
 # different name
 alias a=alarm
 # /dev/ttyACM0 can be in config file, or as environmantal variable, see /usr/share/doc/adafruit-ampy/README.md
@@ -77,9 +95,7 @@ alias r='rem -cu+2 -@'
 # https://askubuntu.com/a/22043
 alias s='sudo '
 alias sa='ssh-add -l || ssh-add'
-alias sca='ssh ca'
 alias se='sudo -E '
-alias sia='ssh ia'
 alias sp='ssh pp'
 alias spd='speedtest; librespeed-cli'
 alias sst='ssh studio'