| "run_in provides a shared implementation for cwd and workspace_root execution" |
| |
| run_in_attrs = { |
| "tool": attr.label(mandatory = True, executable = True, cfg = "exec"), |
| "_template_sh": attr.label(default = "//multitool/private:run_in.template.sh", allow_single_file = True), |
| "_template_bat": attr.label(default = "//multitool/private:run_in.template.bat", allow_single_file = True), |
| } |
| |
| def run_in(ctx, env_var): |
| """ |
| run_in implements a rule that runs a tool in a directory provided by env_var |
| |
| Args: |
| ctx: rule ctx argument |
| env_var: env var string that contains the desired execution directory |
| |
| Returns: |
| A list including the DefaultInfo provider for the created wrapper |
| executable |
| """ |
| |
| # This algorithm requires --enable_runfiles (enabled by default on non-windows) |
| template = ctx.file._template_sh |
| wrapper_name = ctx.label.name |
| tool_short_path = ctx.executable.tool.short_path |
| if ctx.executable.tool.extension == "exe": |
| template = ctx.file._template_bat |
| wrapper_name = wrapper_name + ".bat" |
| tool_short_path = tool_short_path.replace("/", "\\") |
| output = ctx.actions.declare_file(wrapper_name) |
| ctx.actions.expand_template( |
| template = template, |
| output = output, |
| substitutions = { |
| "{{tool}}": tool_short_path, |
| "{{env_var}}": env_var, |
| }, |
| ) |
| return [DefaultInfo(executable = output, runfiles = ctx.attr.tool[DefaultInfo].default_runfiles)] |
