topgrade 17.4.0

Upgrade all the things
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use std::path::PathBuf;

use color_eyre::eyre::Result;

use crate::command::CommandExt;
use crate::execution_context::ExecutionContext;
use crate::terminal::print_separator;
use crate::utils;
use crate::utils::PathExt;

/// <https://github.com/Gelio/go-global-update>
pub fn run_go_global_update(ctx: &ExecutionContext) -> Result<()> {
    let go_global_update = require_go_bin(ctx, "go-global-update")?;

    print_separator("go-global-update");

    ctx.execute(go_global_update).status_checked()
}

/// <https://github.com/nao1215/gup>
pub fn run_go_gup(ctx: &ExecutionContext) -> Result<()> {
    let gup = require_go_bin(ctx, "gup")?;

    print_separator("gup");

    let mut command = ctx.execute(gup);
    command.arg("update");

    for exclude in ctx.config().gup_exclude() {
        command.args(["--exclude", exclude]);
    }

    command.status_checked()
}

/// Get the path of a Go binary.
fn require_go_bin(ctx: &ExecutionContext, name: &str) -> Result<PathBuf> {
    utils::require(name).or_else(|_| {
        let go = utils::require("go")?;
        // TODO: Does this work? `go help gopath` says that:
        // > The GOPATH environment variable lists places to look for Go code.
        // > On Unix, the value is a colon-separated string.
        // > On Windows, the value is a semicolon-separated string.
        // > On Plan 9, the value is a list.
        // Should we also fallback to the env variable?
        let gopath_output = ctx.execute(go).always().args(["env", "GOPATH"]).output_checked_utf8()?;
        let gopath = gopath_output.stdout.trim();

        PathBuf::from(gopath).join("bin").join(name).require()
    })
}