added missing file config_installer.rs

src/config_installer.rs

@@ -0,0 +1,151 @@
+use std::fs::*;
+use std::io::Write;
+use std::process::Command;
+use std::ffi::OsStr;
+use std::path::Path;
+
+use crate::fail::{HError, HResult};
+use crate::widget::WidgetCore;
+
+
+pub fn ensure_config(core: WidgetCore) -> HResult<()> {
+    if has_config()? {
+        let previewers_path = crate::paths::previewers_path()?;
+        let actions_path = crate::paths::actions_path()?;
+
+        if !previewers_path.exists() {
+            core.show_status("Coulnd't find previewers in config dir! Adding!")?;
+            install_config_previewers()
+                .or_else(|_|
+                         core.show_status("Error installing previewers! Check log!"))?;
+        }
+
+        if !actions_path.exists() {
+            core.show_status("Coulnd't find actions in config dir! Adding!")?;
+            install_config_actions()
+                .or_else(|_|
+                         core.show_status("Error installing actions! Check log!"))?;
+        }
+
+        return Ok(());
+    }
+
+    let msg = match install_config_all() {
+        Ok(_) => format!("Config installed in: {}",
+                         crate::paths::hunter_path()?.to_string_lossy()),
+        Err(_) => format!("{}Problems with installation of default configuration! Look inside log.",
+                          crate::term::color_red()),
+    };
+    core.show_status(&msg)?;
+
+    Ok(())
+}
+
+
+fn default_config_archive() -> &'static [u8] {
+    let default_config = include_bytes!("../config.tar.gz");
+    default_config
+}
+
+fn has_config() -> HResult<bool> {
+    let config_dir = crate::paths::hunter_path()?;
+
+    if config_dir.exists() {
+        return Ok(true);
+    } else {
+        return Ok(false);
+    }
+}
+
+
+fn install_config_all() -> HResult<()> {
+    let hunter_dir = crate::paths::hunter_path()?;
+    let config_dir = hunter_dir.parent()?;
+
+    if !hunter_dir.exists() {
+        // create if non-existing
+        std::fs::create_dir(&hunter_dir)
+            .or_else(|_| HError::log(&format!("Couldn't create directory: {}",
+                                              hunter_dir.as_os_str()
+                                                        .to_string_lossy())))?;
+    }
+
+    let archive_path = create_archive()?;
+    extract_archive(config_dir, &archive_path)?;
+    delete_archive(archive_path)?;
+
+    Ok(())
+}
+
+fn move_dir(from: &str, to: &Path) -> HResult<()> {
+    let success = Command::new("mv")
+        .arg(from)
+        .arg(to.as_os_str())
+        .status()
+        .map(|s| s.success());
+
+    if success.is_err() || !success.unwrap() {
+        HError::log(&format!("Couldn't move {} to {} !",
+                             from,
+                             to.to_string_lossy()))
+    } else {
+        Ok(())
+    }
+}
+
+fn install_config_previewers() -> HResult<()> {
+    let hunter_dir = crate::paths::hunter_path()?;
+    let archive_path = create_archive()?;
+    extract_archive(Path::new("/tmp"), &archive_path)?;
+    move_dir("/tmp/hunter/previewers", &hunter_dir)?;
+    delete_archive(&archive_path)
+}
+
+fn install_config_actions() -> HResult<()> {
+    let hunter_dir = crate::paths::hunter_path()?;
+    let archive_path = create_archive()?;
+    extract_archive(Path::new("/tmp"), &archive_path)?;
+    move_dir("/tmp/hunter/actions", &hunter_dir)?;
+    delete_archive(&archive_path)
+}
+
+fn create_archive() -> HResult<&'static str> {
+    let archive_path = "/tmp/hunter-config.tar.gz";
+    let def_config = default_config_archive();
+
+    File::create(archive_path)
+        .and_then(|mut f| {
+            f.write_all(def_config).map(|_| f)
+        })
+        .and_then(|mut f| f.flush())
+        .or_else(|_| {
+            HError::log(&format!("Failed to write config archive to: {}",
+                                 archive_path))
+        })?;
+    Ok(archive_path)
+}
+
+
+fn extract_archive(to: &Path, archive_path: &str) -> HResult<()> {
+    let success = Command::new("tar")
+        .args(&[OsStr::new("-C"),
+                to.as_os_str(),
+                OsStr::new("-xf"),
+                OsStr::new(archive_path)])
+        .status()
+        .or_else(|_| HError::log(&format!("Couldn't run tar!")))
+        .map(|s| s.success())?;
+
+    if !success {
+        HError::log(&format!("Extraction of archive failed! Archive: {}",
+                             archive_path))?
+    }
+
+    Ok(())
+}
+
+fn delete_archive(archive_path: &str) -> HResult<()> {
+    std::fs::remove_file(archive_path)
+        .or_else(|_| HError::log(&format!("Deletion of archive failed! Archive: {}",
+                                          archive_path)))
+}