shell: include git branch in PS1 , add ssh-agent and add rust

.stow-local-ignore

@@ -1,2 +1,3 @@
 ^/\.git.*
 .*\.bak$
+readme.md

readme.md

@@ -0,0 +1,79 @@
+# Stew Home
+
+This repo contains dotfiles LailaTheElf uses in the home directory. It also
+contains a script (`stow/dot-local/bin/stowhome`) that uses GNU Stow to link
+them from all the correct spots.
+
+## Install
+
+> NOTE: this is made for [ElfOS](https://gitea.finnvanreenen.nl/LailaTheElf/ElfOS.git)
+> any other setup are **not** suported!
+
+1. Install GNU Stow:
+
+```sh
+sudo pacman -Sy stow
+```
+
+2. Clone this repository to `~/.config/dotfiles`.
+
+```sh
+git clone https://gitea.finnvanreenen.nl/LailaTheElf/stowhome.git -O "$HOME/.config/dotfiles"
+```
+
+3. Install stowhome
+
+```sh
+"$HOME/.config/dotfiles/stow/dot-local/bin/stowhome" stow
+```
+
+## File structure
+
+Of the repo, the root directory contains a folder for every package and the
+following files:
+
+- **.stow-local-ignore**: The ignore file for GNU Stow (uses [Perl regex](https://perldoc.perl.org/perlre)).
+- **readme.md**: This file.
+
+The packages is essentially a chroot of the home directory. All the files in
+there are links to the corresponding place of the home directory (except the
+once matching a line in the `.stow-local-ignore` file).
+
+The `--dotfile` option is used; this means files and directories starting with
+'dot-' will be prepended with a dot. So `dot-local` will become `.local`. This
+is to prevent a repository full of hidden files.
+
+## Usage
+
+### Link the dotfiles (stewing)
+
+```sh
+stowhome <package> [<package> [<package> [...]]]
+```
+
+Where `<package>` is a directory from this repo or `all` foor all packages.
+
+If the dotfiles already exist as normal files (not symlinks), it will skip this
+file. To overwrite the file in stow, use this command:
+
+```sh
+stowhome --adopt <package> [<package> [<package> [...]]]
+```
+
+To overwrite the dotfile, you can just remove or rename the file and then run
+`stowhome` again.
+
+### Unlink the dotfiles (destewing)
+
+```sh
+stowhome -D <package> [<package> [<package> [...]]]
+```
+
+### Update dotfiles
+
+To edit an already managed by stowhome dotfile, you can just edit it. The
+changes will update in the Git repository (`$HOME/.config/dotfiles`), but no
+commit will be made.
+
+Overriding a file with one in this repo is easies by removing or renaming the
+file.

shell/dot-bashrc

@@ -9,9 +9,36 @@ alias ls='ls --color=auto'
 alias la='ls --color=auto -plhA'
 alias grep='grep --color=auto'
 
-PS1='\n\h \W\n\$ '
+parse_git_branch() {
+    local b=$(git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/')
+    if [ "$b" != "" ]
+    then
+        git diff --cached --exit-code &> /dev/null || b="${b}+"
+        git diff --exit-code &> /dev/null || b="${b}*"
+    fi
+    echo -n "$b"
+}
+# \e[0;$(e=$?;((e))&& echo "91" || echo "0"))m\]\$\[\e[0m\] 
+PS1='\n\[\e[35m\]\h \[\e[32m\]\w \[\e[35m\]$(parse_git_branch)\[\e[0m\]\n$ '
 
 export PATH="$PATH:$HOME/.local/bin"
 export EDITOR=vim
 export QSYS_ROOTDIR="$HOME/.local/intelFPGA_lite/18.1/quartus/sopc_builder/bin"
 . "$HOME/.cargo/env"
+
+# start ssh-agent
+if [[ ! -f "$HOME/.ssh/agent.env" ]]
+then
+    ssh-agent >"$HOME/.ssh/agent.env"
+else
+    . "$HOME/.ssh/agent.env" >/dev/null
+    ps -p $SSH_AGENT_PID >/dev/null || ssh-agent >"$HOME/.ssh/agent.env"
+fi
+. "$HOME/.ssh/agent.env"
+export SSH_AGENT_PID;
+export SSH_AUTH_SOCK;
+
+# rust
+export RUSTUP_HOME="$HOME/.local/rust/rustup"
+export CARGO_HOME="$HOME/.local/rust/cargo"
+. $HOME/.local/rust/cargo

stow/dot-local/bin/stowhome

@@ -1,8 +1,24 @@
 #!/bin/bash
 
+function get_all_packages() {
+    cd "$HOME/.config/dotfiles"
+    find . -maxdepth 1 -type d -not -name ".git" -not -name "."
+}
+
+stow_cmd="stow --dir '$HOME/.config/dotfiles' --target '$HOME' --dotfiles"
+
 if [ "$*" == "" ]
-do
+then
     echo "you must supply at least one package"
+    echo
+    echo "available packages:"
+    get_all_packages | sed -e 's|^.\/|  - |'
 else
-    stow --dir "$HOME/.config/dotfiles" --target "$HOME" --dotfiles $*
+    if [ "$(echo "$*" | grep -E -e '^(.* )?all$')" != "" ]
+    then
+        all_packages=$(get_all_packages | sed -e 's|^.\/||' | tr '\n' ' ')
+        $stow_cmd $(echo "$*" | sed -e "s/all/$all_packages/")
+    else
+        $stow_cmd $*
+    fi
 fi