Execute commands only when successful

archiso/scripts/build.fish

@@ -14,17 +14,19 @@ begin
     set -l nixDir "$profileDir/$root/nix/var/nix/profiles/per-user/root/channels/nixpkgs"
 
     mkdir -p "$rootHome"
-    fish "$(status dirname)/../../scripts/copy-repo.fish" "$projectDir"
+    and fish "$(status dirname)/../../scripts/copy-repo.fish" "$projectDir"
 
+    and begin
         if [ ! -d "$nixCache" ]
             mkdir -p "$nixCache"
-        git clone https://github.com/NixOS/nixpkgs.git --depth=1 -b "$nixVersion" "$nixCache"
-        rm -rf "$nixCache/.git"
+            and git clone https://github.com/NixOS/nixpkgs.git --depth=1 -b "$nixVersion" "$nixCache"
+            and rm -rf "$nixCache/.git"
+        end
     end
 
-    sudo mount --mkdir -t overlay overlay -o lowerdir=.:"$overlayDir",upperdir="$upperDir",workdir="$workDir" "$profileDir"
-    sudo mount --mkdir --bind "$nixCache" "$nixDir"
-    sudo mkarchiso $argv "$profileDir"
+    and sudo mount --mkdir -t overlay overlay -o lowerdir=.:"$overlayDir",upperdir="$upperDir",workdir="$workDir" "$profileDir"
+    and sudo mount --mkdir --bind "$nixCache" "$nixDir"
+    and sudo mkarchiso $argv "$profileDir"
     sudo umount "$nixDir"
-    sudo umount "$profileDir"
+    and sudo umount "$profileDir"
 end

archiso/scripts/show-diff.fish

@@ -8,17 +8,17 @@ begin
     begin
         . "$dir/template-path.fish"
         rm -rf "$contextRoot"
-        cp -r "$(templatePath)" "$contextRoot"
-        chmod -R 755 "$contextRoot"
-        git init "$contextRoot"
-        git -C "$contextRoot" add .
+        and cp -r "$(templatePath)" "$contextRoot"
+        and chmod -R 755 "$contextRoot"
+        and git init "$contextRoot"
+        and git -C "$contextRoot" add .
 
-        begin
+        and begin
             git -C "$projectDir" ls-files
             git -C "$projectDir" ls-files --exclude-standard --others
         end | \
             rsync -r --include-from=/dev/stdin --exclude={.gitignore,README.md,scripts,LICENSE,valhalla.patch} "$dir/.." "$contextRoot"
     end 2>&1 > /dev/null;
 
-    git -C "$contextRoot" diff
+    and git -C "$contextRoot" diff
 end

archiso/scripts/update.fish

@@ -6,7 +6,9 @@ begin
     . "$dir/template-path.fish"
     cp -r "$(templatePath)"/* "$projectDir"
 
+    and begin
         if [ -f "$patch" ]
             git -C "$projectDir" apply --directory=archiso "$patch"
         end
     end
+end

scripts/copy-repo.fish

@@ -3,10 +3,10 @@ begin
     set -l target "$argv[1]"
     set -l dir "$(status dirname)/.."
     git clone "$dir" "$target"
-    git -C "$dir" diff HEAD | git -C "$target" apply --allow-empty
+    and git -C "$dir" diff HEAD | git -C "$target" apply --allow-empty
 
-    git -C "$dir" ls-files --exclude-standard --others | \
+    and git -C "$dir" ls-files --exclude-standard --others | \
         while read file
-            cp "$dir/$file" "$target/$file"
+            and cp "$dir/$file" "$target/$file"
         end
 end