add `file_prefix` option to config and opening function

5 files changed, 32 insertions, 2 deletions

diff --git a/README.md b/README.md
index 6907af4..8a503e8 100644
--- a/README.md
+++ b/README.md
@@ -145,6 +145,9 @@ editor = "vim" # with args: "vim -y"
 pdf_opener = "xdg-open"
 # Default app to open URLs/DOIs
 url_opener = "xdg-open"
+# Prefix which is prepended to the filepath from the `file` field
+# Use absolute paths (~ for HOME works). Otherwise, loading might not work.
+file_prefix = "/some/path/prefix"
 ```
 
 If no file or dir is set as `bibfiles` value, you *have to* add a path via CLI
@@ -152,6 +155,23 @@ interface. If the `bibfiles` value is set *and* a further path (or multiple) is
 provided through the CLI call, the entries of all those files will be opened in
 the started `bibiman` session.
 
+The file prefix offers the possibility to keep file paths in your `.bib` file
+short: E.g. a combination of those values in config and bibfile:
+
+```toml
+# bibiman.toml
+file_prefix = "~/Documents/literature"
+```
+
+```bibtex
+# bibfile.bib
+file = {aristotle.pdf}
+```
+
+Will result in opening the file `~/Documents/literature/aristotle.pdf` when
+trying to open the PDF from inside `bibiman`. The `.bib` file itself will not be
+edited!
+
 ### Color Configuration<a name="color-configuration"></a>
 
 Furthermore, it is now possible to customize the colors. The following values
diff --git a/files/bibiman.toml b/files/bibiman.toml
index 2e5d51b..987e780 100644
--- a/files/bibiman.toml
+++ b/files/bibiman.toml
@@ -12,6 +12,10 @@
 ## Default app to open URLs/DOIs
 # url_opener = "xdg-open"
 
+## Prefix which is prepended to the filepath from the `file` field
+## Use absolute paths (~ for HOME works). Otherwise, loading might not work.
+# file_prefix = [ "/some/path/prefix" ]
+
 # [colors]
 ## Default values for dark-themed terminal
 ## Possible values are:
diff --git a/src/app.rs b/src/app.rs
index e41defc..1eaa1a3 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -359,7 +359,11 @@ pub fn open_connected_file(cfg: &BibiConfig, file: &OsStr) -> Result<()> {
     // Build command to execute pdf-reader. 'xdg-open' is Linux standard
     let cmd = &cfg.general.pdf_opener;
     // If necessary, replace ~ with /home dir
-    let file = PathBuf::from(file);
+    let file = if cfg.general.file_prefix.is_some() {
+        cfg.general.file_prefix.clone().unwrap().join(file)
+    } else {
+        PathBuf::from(file)
+    };
 
     let file = expand_home(&file);
 
diff --git a/src/config.rs b/src/config.rs
index 956b724..f1ac3ca 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -41,6 +41,7 @@ pub struct General {
     pub editor: Option<String>,
     pub pdf_opener: String,
     pub url_opener: String,
+    pub file_prefix: Option<PathBuf>,
 }
 
 /// Substruct [colors] in config.toml
@@ -66,6 +67,7 @@ impl Default for BibiConfig {
                 editor: None,
                 pdf_opener: select_opener(),
                 url_opener: select_opener(),
+                file_prefix: None,
             },
             colors: Colors {
                 main_text_color: Color::Indexed(250),
diff --git a/tests/biblatex-test.bib b/tests/biblatex-test.bib
index 0a1202e..4071dcb 100644
--- a/tests/biblatex-test.bib
+++ b/tests/biblatex-test.bib
@@ -80,7 +80,7 @@
     keywords = {primary, ancient, philosophy},
     langid = {english},
     langidopts = {variant=american},
-    file = {~/Documents/projects/coding/bibiman/tests/aristotle_physics.pdf},
+    file = {~/Documents/coding/projects/bibiman/tests/aristotle_physics.pdf},
     annotation = {A \texttt{book} entry with a \texttt{translator} field},
 }