Merge pull request #19 from rafaelrinaldi/installer

Improve installer and add docs

README.md

@@ -28,12 +28,15 @@ omf install pure
 ```
 
 ### Manually
+
+#### via `curl`
+
 ```sh
-set -l ffns (echo $HOME/.config/fish/functions)
-curl -Ls https://raw.github.com/rafaelrinaldi/pure/master/fish_prompt.fish > $ffns/fish_prompt.fish
-. $ffns/fish_prompt.fish
+curl -Ls https://raw.github.com/rafaelrinaldi/pure/master/installer.fish > /tmp/pure_installer.fish
+source /tmp/pure_installer.fish; and install_pure
 ```
 
+
 ## Features
 
 - [x] Display current directory tail

installer.fish

@@ -0,0 +1,102 @@
+set color_success (set_color green)
+set color_error (set_color --bold red)
+set color_white (set_color white)
+set color_normal (set_color normal)
+
+function pure::set_fish_config_path
+    printf "\tSet environment variable: %s\n" "\$FISH_CONFIG_DIR"
+    if test (count $argv) -ge 1
+        set -gx FISH_CONFIG_DIR $argv[1]
+    else
+        set -gx FISH_CONFIG_DIR "$HOME/.config/fish"
+    end
+end
+
+function pure::set_pure_install_path
+    printf "\tSet environment variable: %s\n" "\$PURE_INSTALL_DIR"
+    if test (count $argv) -ge 2
+        set -gx PURE_INSTALL_DIR $argv[2]
+    else
+        set -gx PURE_INSTALL_DIR "$FISH_CONFIG_DIR/functions/theme-pure"
+    end
+end
+
+function pure::check_git_is_available
+    printf "\tChecking for git availability"
+    command --search git >/dev/null 2>&1; or begin;
+        printf "%sError: git is not installed%s" "$color_error" "$color_normal"
+        exit 1
+    end
+end
+
+function pure::fetch_source
+    printf "\tFetching theme's source"
+    env git clone --depth=1 --quiet https://github.com/rafaelrinaldi/theme-pure.git $PURE_INSTALL_DIR; or begin;
+        printf "%sError: git clone of theme-pure repo failed%s" "$color_error" "$color_normal"
+        exit 1
+    end
+end
+
+function pure::backup_existing_theme
+    printf "\tBackuping existing theme\n"
+    set -l old_prompt $FISH_CONFIG_DIR/functions/fish_prompt.fish
+    set -l backup_prompt $old_prompt.ignore
+    if test -f "$old_prompt"
+        mv "$old_prompt" "$backup_prompt"
+        printf "\t\tPrevious config saved to: %s%s%s." "$color_white" "$backup_prompt" "$color_normal"
+    end
+end
+
+function pure::enable_autoloading
+    printf "\tEnabling autoloading for pure's functions on shell init"
+    set -l marker "# THEME PURE #"
+    if not test (grep "$THEME_PURE" $FISH_CONFIG_DIR/config.fish 2>&1 >/dev/null)
+        echo "$marker" >> $FISH_CONFIG_DIR/config.fish
+        echo "set fish_function_path $PURE_INSTALL_DIR" '$fish_function_path' >> $FISH_CONFIG_DIR/config.fish
+    end
+    ln -sf $PURE_INSTALL_DIR/fish_prompt.fish $FISH_CONFIG_DIR/functions/
+end
+
+function pure::enable_theme
+    printf "\tEnabling theme"
+    set fish_function_path $PURE_INSTALL_DIR $fish_function_path
+    source $FISH_CONFIG_DIR/functions/fish_prompt.fish
+end
+
+function pure::clean_after_install
+    printf "\tCleaning after install"
+    functions --erase pure::set_fish_config_dir
+    functions --erase pure::set_pure_install_dir
+    functions --erase pure::check_git_is_available
+    functions --erase pure::fetch_source
+    functions --erase pure::backup_existing_theme
+    functions --erase pure::enable_autoloading
+    functions --erase pure::enable_theme
+end
+
+function pure::success
+    echo $color_success "✔" $color_normal
+end
+function pure::error
+    echo $color_error "✖" $color_normal
+end
+
+function pure::exit_symbol
+    if test $argv[1] -eq 0
+        pure::success
+    else
+        pure::error
+    end
+end
+
+function install_pure
+    printf "Installing Pure theme\n"
+    pure::set_fish_config_path $argv
+    pure::set_pure_install_path $argv
+    pure::check_git_is_available; pure::exit_symbol $status
+    pure::fetch_source; pure::exit_symbol $status
+    pure::backup_existing_theme; pure::exit_symbol $status
+    pure::enable_autoloading; pure::exit_symbol $status
+    pure::enable_theme; pure::exit_symbol $status
+    pure::clean_after_install; pure::exit_symbol $status
+end